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Tytuł:
Vitamin D in SARS-CoV-2 infection
Autorzy:
Decyk, A.
Kobylinska, M.
Antosik, K.
Kurowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/2083105.pdf
Data publikacji:
2022
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
COVID-19
SARS-CoV-2 pandemic
vitamin D3
supplementation
koronawirus SARS-CoV-2
witamina D3
suplementacja
Opis:
Background. SARS-CoV-2 virus is one of the largest RNA viruses, included in the coronavirus group, showing tropism to airway epithelial cells. SARS-CoV-2 causes an acute respiratory infectious disease, Covid-19. According to WHO reports, mortality due to Covid-19 is higher in the elderly and in those burdened with comorbidities such as diabetes, obstructive pulmonary disease, coronary artery disease, cancer, hypertension, hepatitis B, obesity or chronic kidney disease. Objective. The aim of the study was to review the current literature on the influence and importance of vitamin D levels on the course of SARS-CoV-2 infection. Material and method. A systematic review of studies published from January 1, 2009 to June 31, 2021 has been performed. For this purpose, bibliographic databases such as PubMed and Scopus were searched. The following keywords and combinations were used: Covid-19, vitamin D, 25-hydroxy-vitamin D, vitamin D supplementation, SARS-CoV-2. Results. It has been shown that vitamin D plays an important role in the mechanisms of the innate immunity in the course of the acute respiratory infections. The overlapping factors of the severity of COVID-19 disease, vitamin D deficiency, and the prevalence of obesity, age scare, ethnicity, has led some researchers to hypothesize that vitamin D supplementation may be promising as a preventive or therapeutic measure for COVID-19. Conclusions. A very important factor that has an immunomodulatory character is vitamin D, the adequate supplementation of which can be a preventive or therapeutic measure in case of SARS-CoV-2 infection, especially in elderly people, with obesity and other chronic diseases.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2022, 73, 1; 5-12
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Częstość występowania klas jakości mięsa tuczników pochodzących z pogłowia masowego
Frequency of meat quality classes in fatteners from the mass population
Autorzy:
Sieczkowska, H.
Nurzynska, A.
Tarczynski, K.
Zybert, A.
Krzecio-Nieczyporuk, E.
Antosik, K.
Powiązania:
https://bibliotekanauki.pl/articles/843991.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Zootechniczne
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2019, 15, 1
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Częstość występowania mutacji c.1473+1G>A w genie ADAMTS17 u psów ras predysponowanych do wystąpienia pierwotnego zwichnięcia soczewki w polskich hodowlach
The incidence of c.1473+1G>A mutation in the ADAMTS17 gene in canine breeds predisposed for primary lens luxation (PLL) in Polish kennel
Autorzy:
Lisiak-Teodorczyk, K.
Mackowski, M.
Cholewinski, G.
Wojciechowicz, J.
Antosik, P.
Powiązania:
https://bibliotekanauki.pl/articles/860588.pdf
Data publikacji:
2018
Wydawca:
Krajowa Izba Lekarsko-Weterynaryjna
Tematy:
Polska
psy rasowe
hodowla zwierzat
choroby oczu
choroby dziedziczne
genetyka zwierzat
pierwotne zwichniecie soczewki
gen ADAMTS17
mutacja c.1473+1G>A
wystepowanie
czestotliwosc wystepowania
Źródło:
Życie Weterynaryjne; 2018, 93, 09
0137-6810
Pojawia się w:
Życie Weterynaryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of activated carbon from the biodegradable film for CO2 capture applications
Autorzy:
Serafin, J.
Antosik, A. K.
Wilpiszewska, K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/949409.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
biodegradable film activated carbon
adsorption
CO2
capture
Opis:
In this work for the first time, activated carbons were prepared from carboxymethyl fi lm (low-cost carboxymethyl fi lm waste), using chemical activation with potassium hydroxide. The samples were characterized by nitrogen adsorption-desorption at 77 K, XRD, SEM methods. The high values of the specifi c surface area and total pore volume were achieved and were equal to 2064 m2/g and 1.188 cm3 /g, respectively. Waste from the fi lm can be immediately utilized without CO2 production. This is the environmentally friendly way of waste utilization. Through this process, we can protect our environment. This study showed that the activated carbon obtained from carboxymethyl fi lm waste can be used as a good adsorbent for CO2 adsorption.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 3; 75-80
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ montmorylonitu na właściwości reologiczne wodnych dyspersji karboksymetyloskrobi
Influence of montmorillonite on the rheological properties of water disperisons of carboxymethyl starch
Autorzy:
Antosik, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/172201.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
karboksymetyloskrobia
montmorylonit
wodne dyspersje
carboxymethyl starch
montmorillonite
water dispersion
Opis:
Water dispersions are usually a colloidal system in which one of the phases is highly dispersed in a second of a continuous nature, called a dispersion medium (in this case it is water). Dispersal is also called the process of distraction and self- -disperse as such. Water dispersions of carboxymethyl starch are the basis for the preparation of many products that, due to their initial dispersion form, can be modified, e.g. by adding fillers such as biodegradable films that affect the rheological properties of the dispersion [1]. The carboxymethyl derivative of starch was synthesized for the first time in 1924. The carboxymethylation reaction has become one of the most important starch modifications used in the industry on a large scale. Carboxymethyl starch (CMS) is characterized by a good solubility in cold water and higher resistance to bacteria than unmodified starch [7–9]. The carboxymethyl starch is obtained by the reaction of carboxymethylation (etherification) of the alkaline starch consisting in the introduction of the substituents into the structure of the starch, by reaction with monochloroacetic acid sodium salt. This process is called Williamson’s synthesis and CMS with different degree of substitution can be obtained by means of the mentioned process [10, 11]. The degree of substitution of carboxymethyl starch has a significant influence on its rheological properties, water dispersion of CMS with DS = 0.87 showed five times higher viscosity than CMS with lower value of this parameter, i.e. 0.15. Water dispersions with an increase in the montmorillonite content showed a high viscosity increase (about twice the increase in viscosity with the addition of 3% by weight). In both cases, aqueous dispersions stored above one month may be subject to the environmental degradation. In addition, in cases of compositions containing MMT, a rapid drop in viscosity due to the montmorillonite sedimentation is observed [17]. Rheological research of water carboxymethyl starch dispersions has great importance for science and for the subsequent application possibilities of products obtained on their basis. The effect of fillers on viscosity, and thus on the possibility of mixing them with aqueous CMS dispersions, affects, for example, the production of biodegradable films based on CMS with MMT, where the film is obtained from an aqueous dispersion of CMS with MMT with the addition of glycerine and citric acid [22]. Moreover, water dispersion of carboxymethyl starch with the addition of montmorillonite can be used as an additive to drilling fluids, electro-reed liquids or foundry adhesives [17].
Źródło:
Wiadomości Chemiczne; 2018, 72, 11-12; 829-839
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fragrant films on the basis of potato starch
Autorzy:
Drewnowska, E.
Antosik, A. D.
Wróblewska, A.
Czech, Z.
Wilpiszewska, K.
Powiązania:
https://bibliotekanauki.pl/articles/778537.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fragrant starch-based films
biodegradability
starch
α-pinene
eugenol
Opis:
New fragrant and biodegradable starch-based films have been obtained. These films were prepared by the method of the outpour into the Teflon mould of the starch composition containing such fragrant compounds as: eugenol or α-pinene. For characterizing the final products the following properties were taken into account: the solubility in water, the absorbance of moisture from air and the length of release of the fragrant compound. The obtained starch-based films were characterized by the relatively long time of release the fragrant compound and also by the good absorbance of moisture from air. Taking into account the properties of the obtained films, they can find applications in production of appliances used in the bioactive cleaning of air. The prototype of such a product was presented in this work. The presented studies show the potential of applying these materials in the future, and thus these examinations should be developed.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 2; 88-92
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Montmorillonite as the catalyst in oxidation of limonene with hydrogen peroxide and in isomerization of limonene
Autorzy:
Malko, M.
Antosik, A. K.
Wróblewska, A.
Czech, Z.
Wilpiszewska, K.
Miądlicki, P.
Michalkiewicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/779496.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
montmorillonite
R-(+)-limonene
oxidation
isomerization
hydrogen peroxide
heterogeneous catalysis
Opis:
In our studies montmorillonite (MMT) was used as the heterogeneous, natural catalyst. This material was previously prepared by bentonite purification with help of the sedimentation method. The obtained catalyst was characterized by: XRD, SEM, BET and EDX. Catalytic tests with montmorillonite as the catalyst were performed with the natural terpene – R-(+)-limonene. This compound was oxidized with hydrogen peroxide and, moreover, in the separate process it was also isomerized. As the main products of limonene oxidation were detected: (1,2-8,9)-diepoxide, perillyl alcohol, carvone, carveol, 1,2-epoxylimonene and 1,2-epoxylimonene diol. In the isomerization of R-(+)-limonene were formed: terpinenes, terpinolene and p-cymene. Conversions of limonene in these processes reached 70–80%. The application of montmorillonite (the natural of origin) in the studied processes (oxidation and isomerization) is environmentally friendly, it allows to reduce the cost of the studied processes. The resulting products of the processes of oxidation and isomerization of R-(+)-limonene have many applications.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 4; 50-58
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przewodzące samoprzylepne kleje akrylanowe z napełniaczami węglowymi
Conductive acrylic pressure-sensitive adhesives with carbon filler
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172375.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
przewodzące kleje samoprzylepne
polimery
samoprzylepne kleje akrylanowe
adhesives
conductive pressure-sensitive adhesives
polymer
acrylic pressure-sensitive adhesives
Opis:
Pressure-sensitive adhesives (PSA) are a group of adhesive-based macromolecular polymers which are characterized by good (satisfying the requirements of industrial) adhesion and cohesion; high temperature stability during use, excellent aging resistance and constant tear strength. In 1935, the concept of self-adhesive glue, wherein the obtained self-adhesive product of the invention R. Stanton Avery, was firstly developed. From many types of adhesives, the most common adhesives are acrylics pressure-sensitive adhesives [1–3]. In most cases, self-adhesive adhesives do not exhibit good conductive properties, whereas conductivity grades are classified in the group of insulators. In order to improve their conductive properties, studies have been conducted on the modification of polymers in adhesive compositions, where at least one of the components exhibited conductive properties (e.g. polymers with conjugated π-bonded polymers along polymeric chains). However, the best effects were obtained by adding conductive fillers such as metal (copper, aluminum), specially modified soot, nanotubes or graphene, carbon fibers, metallized glass and conductive fibers. This allowed the creation of electrically conductive compositions characterizing by conductivity in the range from 10–2 to 102 S/cm. This relatively high conductivity is the result of the percolation of conductive filler molecules into an insulating matrix or tunneling between electrically conductive molecules [10, 11]. Acrylate pressure-sensitive adhesives with conductive fillers have found a number of important industrial applications, especially in the electronics industry. Pressure- sensitive adhesives, such as self-adhesive tapes or adhesive films, are used as heating elements, sensors or conductive gums. Due to their good performance, they can be used to connect solar panels or glue small components in the microelectronics industry. They also can be used to discharge static charges from the surface – used as flexible drainage connections – especially in places where the spark is undesirable and can be dangerous. They are used as heating elements [10, 12, 27].
Źródło:
Wiadomości Chemiczne; 2017, 71, 11-12; 887-896
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatność kryteriów diagnozujących klasy jakości mięsa wieprzowego do szacowania cech przydatności kulinarnej mięsa
Usefulness of pork meat quality classes criteria in assessing of its culinary value
Autorzy:
Sieczkowska, H.
Andrzejczuk, A.
Zybert, A.
Krzecio-Niczyporuk, E.
Antosik, K.
Tarczynski, K.
Kocwin-Podsiadla, M.
Powiązania:
https://bibliotekanauki.pl/articles/843319.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Zootechniczne
Tematy:
mieso wieprzowe
jakosc miesa
klasy jakosci
przydatnosc kulinarna
korelacja fenotypowa
Opis:
Celem badań było określenie przydatności kryteriów (pH, R1, EC) diagnozujących podstawowe klasy jakości mięsa wieprzowego (RFN, PSE, DFD, AM) do szacowania podstawowych cech przydatności kulinarnej mięsa. Badania przeprowadzono w sezonie wiosenno-jesiennym na 320 tucznikach pogłowia masowego. Zapewniono jednakowe warunki odchowu, obrotu przedubojowego i uboju zwierząt oraz postępowania poubojowego z tuszami. Analizowany materiał badawczy był wyrównany w zakresie masy tuszy ciepłej (87,09 ±4,05 kg) i procentowej zawartości mięsa w tuszy (56,68 ±3,01%). Udowodnione statystycznie istotne korelacje podstawowych kryteriów jakości mięsa wieprzowego z wybranymi (istotnymi z punktu widzenia konsumenta) cechami decydującymi o jego wartości kulinarnej, potwierdzają ich przydatność do szacowania podstawowych cech przydatności kulinarnej. Dla bardziej precyzyjnego wnioskowania dotyczącego przydatności podstawowych kryteriów diagnozujących klasy jakości mięsa wieprzowego (pH1, pH24, pH48, R1, EC2, EC24) do szacowania cech przydatności kulinarnej mięsa wieprzowego należałoby zastosować do wyliczeń statystycznych analizę kanoniczną, umożliwiającą określenie powiązań dwóch zbiorów zmiennych: objaśnianych (charakteryzujących przydatność kulinarną) i objaśniających (stanowiących podstawowe kryteria diagnozowania jakości mięsa).
The aim of the study was to determine the usefulness of criteria (pH, R1 and EC) used to determine pork quality classes (RFN, PSE, DFD and AM) in assessing culinary value characteristics of pork. The study was carried out on 320 fatteners from the mass population in the spring-autumn season. Rearing conditions, pre-slaughter handling and carcass handling were the same for all animals. The fatteners were similar in terms of hot carcass weight (87.09 ±4.05 kg) and lean meat content (56.68 ±3.01%). The statistically significant correlations found confirmed that basic pork quality criteria are suitable for assessment of selected parameters of culinary value that are important to the consumer. To obtain more precise conclusions regarding the suitability of basic pork quality criteria (pH1, pH24, pH48, R1, EC2 and EC24) for estimation of characteristics of culinary value, canonical analysis should be used to determine the relationships between two sets of variables: independent (basic criteria of pork quality classes) and dependent (basic culinary values of pork).
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2017, 13, 3
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przydatność kulinarna i technologiczna mięsa tuczników trójrasowych (landrace x yorkshire) x duroc i (landrace x yorkshire) x hampshire
Culinary and technological suitability of pork obtained from three-way cross fatteners (Landrace x Yorkshire) x Duroc and (Landrace x Yorkshire) x Hampshire
Autorzy:
Sieczkowska, H.
Zybert, A.
Krzecio-Nieczyporuk, E.
Antosik, K.
Tarczynski, K.
Kocwin-Podsiadla, M.
Powiązania:
https://bibliotekanauki.pl/articles/843151.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Zootechniczne
Tematy:
trzoda chlewna
tuczniki
mieszance trojrasowe
mieszance [landrace x yorkshire] x duroc
mieszance [landrace x yorkshire] x hampshire
mieso wieprzowe
jakosc miesa
przydatnosc kulinarna
przydatnosc technologiczna
Źródło:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2017, 13, 4
1733-7305
Pojawia się w:
Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Samonaprawiające się lakiery
Self-healing varnishes
Autorzy:
Bednarczyk, P.
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172663.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
lakier
samonaprawiające się materiały
powłoki
varnish
self-healing material
coatings
Opis:
The recent decade brought about new dimensions to materials developments; stimuliresponse materials capable of responding to internal or external stimuli. The ability of materials to autonomously self-heal is the most promising property [1]. The number of publications that appeared in the past decade concerning the self-repair of polymeric materials is quite extensive. They cover different fields of research, including thermoplastic and thermoset polymers, polymer composites, and coatings. The first ideas already started to develop in the 1990s, when scientists started to look at nature to solve the recurring problem of damage to materials [2]. The process of implementing a strategy of autorepair of a damage is a subject of increasing interest. One of the challenges for many of the already developed self- -repairing systems is to enhance the structural stability and mechanical properties of the materials. The first developed self-healing materials relied on microencapsulated healing agents within the bulk polymer [3]. Upon mechanical stress, the microcapsules were ruptured releasing agents that reacted with the catalyst in the polymer matrix to repair the damage [4–5]. Among many other crosslinking methods relying mainly on epoxy chemistry, ‘click’-based chemistry, the use of thiolene-based systems, as well as catalytic crosslinking reactions based on ring opening metathesis polymerization have found wide application in materials science. In the latter methodology, the catalyst present inside the matrix then promotes an autorepair reaction via ROMP. Thermosetting autorepair polymers which have been proposed so far include Grubbs’ first-generation catalyst; currently, the possibility of applying other ruthenium catalysts such as second-generation Grubbs’ catalyst and Hoveyda–Grubbs’ second-generation catalyst are under evaluation [3]. In addition to the aforementioned methods, you can also find self-healing coatings in the reaction of Diels-Alder. The self-healing concept envisages a similar recovery of material properties, such as fracture toughness, corrosion resistance, or conductivity, to improve the durability and reliability of the polymer materials. Damage due to impact, wear or fatigue initiates a healing mechanism that preferentially without external stimulus can recover any functionality. Researchers working in the field of self-healing polymeric materials mainly focus on high-end applications where the added value outweighs the cost of production. Such applications can, for example, be found in the transport sector, electronics, and structural materials. Car coatings, structural composites in airplanes, conductive polymers in sensors are only some examples of many targeted applications. Repair of damage in these materials is often laborious, not cost-efficient and only detected on the macroscopic level when it is too late. On the other hand, self -healing materials try to avoid macroscopic failure by responding immediately or at least fast enough to damage [1].
Źródło:
Wiadomości Chemiczne; 2017, 71, 5-6; 381-388
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dwustronnie klejące taśmy na bazie samoprzylepnych klejów silikonowych
Double-side tape based on silicone pressure-sensitive adhesive
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1208802.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
dwustronne taśmy samoprzylepne
silikonowe kleje samoprzylepne
double-side self-adhesive tape
silicone pressure-sensitive adhesives
Opis:
Silikonowe kleje samoprzylepne są wysokiej klasy klejami, które mogą być używane w szerokim zakresie temperaturowym, od –40 do 300ºC, jako taśmy lub etykiety samoprzylepne na różnego rodzaju podłożach, gdzie nie mogą być stosowane typowe PSA. Od 2000 r. obserwuje się wzrost zainteresowania możliwością nowych zastosowań dla PSA silikonowych, zwłaszcza takich produktów samoprzylepnych, jak taśmy medyczne oraz przemysłowe. Sieciowanie silikonowego PSA z grupami metylowymi oraz fenylowymi można przeprowadzić za pomocą nadtlenków organicznych w temp. pomiędzy 120 a 150°C. Taśmy dwustronne są bardzo zróżnicowane pod względem używanych nośników oraz rodzajów klejów samoprzylepnych i służą do łączenia ze sobą wielu rodzajów materiałów. W dostępnej literaturze nie ma doniesień o dwustronnych taśmach na bazie silikonowych PSA. Badane taśmy otrzymano przez dwustronne powlekanie nośnika. Otrzymane dwustronne taśmy samoprzylepne na bazie Si-PSA wykazują dobre właściwości fizyczne dla obu stron filmu klejowego w postaci odpowiedniej kleistości (tacku), odpowiedniej przyczepności (adhezji) oraz wysokiej wytrzymałości wewnętrznej (kohezji).
Silicone pressure-sensitive adhesives are high-performance adhesives that can be utilized over a wide range of temperatures, from –40 to 300ºC. They are widely used in self-adhesives tapes and labels when application conditions or the nature of substrate surfaces surpass the performance boundaries of organic-based PSAs. Since the year 2000, there has been continuing interest in it of new uses for silicone PSAs, especially in applications such as medical and industrial tapes. The crosslinking of silicone PSAs with methyl or/and phenyl groups can be achieved thermally between 120 and 150°C by organic peroxide. Double-side tapes are highly differentiated in used carrier and pressure-sensitive adhesives; they are used for joining together the assembly of all kinds materials. In the available literature there are no reports about double-side tape based on silicone PSA. Tapes were obtained by double-side coating of the carrier. The resulting double-sided self-adhesive tape on the basis of Si-PSA exhibit good physical properties both sides of the adhesive film in a form suitable tackiness (tacku), sufficient adhesion (adhesion), and high internal strength (cohesion).
Źródło:
Chemik; 2016, 70, 7; 369-374
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sieciowanie samoprzylepnych klejów silikonowych
Crosslinking of silicone pressure-sensitive adhesives
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172358.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
polimery
silikonowe kleje samoprzylepne
pressure-sensitive adhesives
polimer
silicone pressure sensitive adhesives
Opis:
Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [1–4]. Since 1960s, silicone pressure-sensitive adhesives have found many uses. They are used in industrial plants, as tapes for joining materials with low surface energy, as well as in the sectors of electrical and electronic, medical care, health care and automotive industry. For about 10 years there has been great interest in new uses for the silicone PSA, particularly for medical and industrial belts. The above examples describe a growing range of potential commercial applications of silicone pressure- -sensitive adhesives. Silicone pressure-sensitive adhesives typically consist of large segments of the silane-functional silicone polymers and silicone resins (MQ). It is well known that silicone pressure-sensitive adhesives because of their unique properties are special-purpose products. The combination of the properties of silicones such as high flexibility of connections Si-O-Si, low intermolecular interaction, low surface tension, excellent thermal stability and transparency for UV radiation, excellent electrical properties, high chemical resistance and weather resistance makes silicone adhesives have improved properties compared to other typical polymeric organic adhesives. Due to the low surface tension of silicone adhesives, adhesive is easily spread on the surface of various materials [4–9]. The properties of silicone pressure sensitive adhesives (Si-PSA) crosslinking thermally by organic peroxides (according to a radical mechanism) depend on the type and concentration of crosslinker used. Benzoyl peroxide (BPO) and 2,4-dichlorobenzoyl peroxide (DClBPO) are the most commonly used peroxides the industry. Increasing the content of BPO or DClBPO in a predominantly affects significantly increase the cohesion, while reducing the adhesion of tested adhesives [1, 5, 6]. With the market testing of pressure sensitive adhesives and literature studies clearly show that there were no studies to date on the process of UV-curing silicone pressure sensitive adhesives; and there is no sales sided adhesive tapes, silicone crosslinked by UV radiation.
Źródło:
Wiadomości Chemiczne; 2016, 70, 1-2; 25-32
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UV-crosslinkable photoreactive self-adhesive hydrogels based on acrylics
Autorzy:
Czech, Z.
Antosik, A.K.
Bednarczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/778227.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
self-adhesive hydrogels
acrylics
UV-crosslinking
tack
peel adhesion
water adsorption
Opis:
Hydrogels are a unique class of macromolecular networks that can hold a large fraction of an aqueous solvent within their structure. They are suitable for biomedical area including controlled drug delivery and for technical applications as self-adhesive materials for bonding of wet surfaces. This paper describes photoreactive self-adhesive hydrogels based on acrylics crosslinked using UV radiation. They are prepared in ethyl acetate through radical polymerization of monomers mixture containing 2-ethylhexyl acrylate (2-EHA), butyl acrylate (BA), acrylic acid (AA) and copolymerizable photoinitiator 4-acryloyloxy benzophenone (ABP) at presence of radical starter 2.2’-azobis-diisobutyronitrile AIBN. The synthesized acrylic copolymers were determined by viscosity and GPC analysis and later modified using ethoxylated amines. 4-acryloyloxy benzophenone (ABP) was used as crosslinking monomer. After UV crosslinking the properties of these novel synthesized hydrogels, such as tack, peel adhesion, shears strength, elongation and water adsorption were also studied.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 2; 126-130
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ napełniaczy krzemowych na właściwości samoprzylepnych klejów silikonowych
Influence of silicone fillers on silicone pressure-sensitive adhesives properties
Autorzy:
Antosik, A. K.
Czech, Z.
Powiązania:
https://bibliotekanauki.pl/articles/172170.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
kleje samoprzylepne
kaolin
montmorylonit
silikonowe kleje samoprzylepne
pressure-sensitive adhesives
montmorilonite
silicone pressure-sensitive adhesives
Opis:
Pressure-sensitive adhesives (PSAs) represent a system that actually dates back to the invention of the self-adhesive articles in 1935 when R. Stanton Avery produced the first coating unit using a wooden cigar box with two holes cut in the bottom. PSAs can be defined as a special category of adhesive which in dry form are permanently tacky at room temperature [2, 6–8]. Since 1960s, silicone pressure-sensitive adhesives have found many uses. They are used in industrial plants, as tapes for joining materials with low surface energy, as well as in the sectors of electrical and electronic, medical care, health care and automotive industry. For about 10 years there has been great interest in new uses for the silicone PSA, particularly for medical and industrial belts. The above examples describe a growing range of potential commercial applications of silicone pressure-sensitive adhesives [2, 7, 9–11]. In contrast to the pressure-sensitive adhesives organic silicone pressure-sensitive adhesives show much better performance by this well known it happened that are used to obtain self-adhesive materials for special purposes. Si-PSA usually consist of large segments of the silanol-functional silicone polymers, and silicone resins. Polymeric chains comprising the silicone resins include methyl and phenyl groups thus are very little reactive chemicals. In order to obtain the best adhesion-cohesion balance are used crosslinked thermally in a temperature range of 120–150°C by using organic peroxides. Peroxides most commonly used in industry benzoyl peroxide (BPO) and 2,4-dichlorobenzoyl peroxide (DClBPO). Silicone pressure- -sensitive adhesives are characterized by high flexibility of connections Si-O-Si, low impact intermolecular, low surface tension, excellent thermal stability and transparency for UV radiation, excellent electrical properties, high chemical resistance and weather resistance [2, 6, 7, 14]. In the available literature the montmorillonite and kaolin modified silicone pressure-sensitive adhesives which exhibited increased thermal resistance are reported. The thermal properties of adhesives compositions are better to compared with “pure” silicon composition without any filler [6, 12–14].
Źródło:
Wiadomości Chemiczne; 2016, 70, 11-12; 761-769
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł

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