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    Wyświetlanie 1-14 z 14
    Tytuł:
    The Influence of Olive Oil Waste as a Biofuel on the Exhaust Gases of the Internal Combustion Engine
    Autorzy:
    Al-Aseebee, Munaf D. F.
    Naje, Ahmed Samir
    Powiązania:
    https://bibliotekanauki.pl/articles/24201727.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    olive oil
    waste
    biofuel
    combustion
    engine
    Opis:
    Future options for addressing the depletion of fossil fuels and reducing pollution from internal combustion engines may include biofuel as an alternative fuel. This study aims to experimentally and statistically assess the effect of using diesel-biofuel blends on the emissions of a single-cylinder direct-injection engine. Using recycled olive oil, a chemical Tran’s esterification process was used to create biofuel. The experimental results were contrasted with those of a one-dimensional engine model for exhaust emissions and torque, which showed high agreement between test and numerical data. In order to comprehend the factors that affect the engine’s reaction to variations in fuel composition, the thermodynamic characteristics of the engine for various blends were also supplied. According to the investigation, a mixture with 20% of the volume fraction of oleic acid methyl ester olive-based biofuel and 80% of the volume fraction of pure diesel can be an effective fuel alternative for cleaner exhaust emissions while offering almost the same performance.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 5; 322--328
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chemical Composition of Monovarietal Extra Virgin Olive Oils Obtained from Tunisian Mills: Influence of Geographical Origin
    Autorzy:
    Manai-Djebali, Hédia
    Trabelsi, Najla
    Medfai, Wafa
    Hessini, Kamel
    Nait Mohamed, Salma
    Madrigal-Martínez, Mónica
    Martinez Cañas, Manuel A.
    Sánchez-Casas, Jacinto
    Ben Youssef, Nabil
    Oueslati, Imen
    Powiązania:
    https://bibliotekanauki.pl/articles/24024623.pdf
    Data publikacji:
    2023-11-28
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    Chétoui olive
    olive oil quality
    nutritional properties
    collection region
    Opis:
    Comprehending the variability in the chemical composition of olive oil from the same olive variety, based on its geographical origin, is essential. This study investigated the chemical composition of Chétoui olive oils from thirteen mills located in Northern Tunisia's Béja region. The chemical composition of olive oil exhibits substantial regional variability. Free acidity ranged from 0.57% to 0.73%, and peroxide values varied between 7.33 and 14.00 meq O2/kg. Total phenolic content varied as well, with values ranging from 906.53 to 1,298.60 caffeic acid eq/kg (oils from Amdoun and Testour II, respectively). Chlorophyll contents ranged from 2.03 to 7.85 mg/kg, and carotenoids from 1.28 to 3.92 mg/kg. Olive oils from Amdoun and Dogga II were the richest in these compounds. In terms of tocopherols, the range extended from 282.88 mg/kg (oil from Tibar) to 416.79 mg/kg (oil from Testour II). DPPH radical scavenging activity of the polar fraction of all olive oils was higher than that of the non-polar fraction. Fatty acid profiles were mostly similar with exception of the oil from Tibar with lower saturated fatty acid content and higher monounsaturated fatty acid content. Substantial differences in polyunsaturated fatty acid content were found. Triacylglycerol compositions differed as well, with the lowest triolein percentage around 13.66% and the highest at approximately 34.98%. In summary, this study reveals significant regional variations in the chemical composition of Chétoui monovarietal olive oil, highlighting the collection region impact on oil quality and nutritional properties.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2023, 73, 4; 354-366
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetic properties of Lipase obtained from Pseudomonas aeruginosa isolated from crude oil contaminated soil
    Autorzy:
    Femi-Ola, Titilayo Olufunke
    Orjiakor, Paul Ikechukwu
    Enerijiofi, Kingsley Erhons
    Oke, Iyanuoluwa Omolade
    Fatoyinbo, Adebayo Adeola
    Powiązania:
    https://bibliotekanauki.pl/articles/134985.pdf
    Data publikacji:
    2019
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    biodegradation
    enzymes
    gel filtration
    lipase
    olive oil
    Pseudomonas aeruginosa
    Opis:
    Soil contaminated with crude oil has negatively affected some of the communities in Ekiti State region in Nigeria. There is an increased interest in microbial lipases because of their enormous potential in industrial and biotechnological applications. This study investigated the characteristics of partially-purified lipase from Pseudomonas aeruginosa isolated from oil-contaminated soil in Ado-Ekiti, Ekiti State. The lipase was purified by gel-filtration, having a molecular weight of 39.11 kDa, with Km and Vmax values of 12.50 and 28.86, respectively. The enzyme had an optimal pH of 8.0 and exhibited its maximal activity at 50°C, whereas the relatively stable temperature and pH were 40°C and 5.0, respectively. The enzyme activity was enhanced by olive oil, which served as the carbon source. Sodium chloride enhanced lipase activity, while calcium chloride acted as mild inhibitor, and iron chloride acted a strong inhibitor. The lipase from Pseudomonas aeruginosa possessed properties of an industrial enzyme and will be useful for biodegradation and bioremediation studies.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 59 (131); 154-161
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Productivism and post-productivism in the olive groves of southern Spain
    Autorzy:
    Sánchez Martínez, José Domingo
    Almonacid, Antonio Garrido
    Powiązania:
    https://bibliotekanauki.pl/articles/1052545.pdf
    Data publikacji:
    2017-06-15
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    Common Agricultural Policy
    olive oil
    rural development
    monoculture
    southern Spain
    Opis:
    This work examines changes in the cultivation of olive groves in the region of Andalusia since the accession of Spain to the European Common Market (1986). The first phase is marked by the triumph of productivism in which some of the basic elements of this model (specialisation and intensification) are overwhelming, according to the statistical sources used for this research, although the behaviour in terms of corporate concentration can be considered unique. Also notable, as we will explain later, are other less desirable effects of the process, which can currently be considered environmentally unsustainable. As the weaknesses and contradictions of the model have become evident, in the recent years – as a result of the new stimuli provided by the Common Agricultural Policy – more attention is paid to the opportunities offered by rural development. For the moment, the results of this approach have been limited, although the 2015–2020 planning period could be decisive for its reorientation.
    Źródło:
    Quaestiones Geographicae; 2017, 36, 2; 57-69
    0137-477X
    2081-6383
    Pojawia się w:
    Quaestiones Geographicae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Can olive oil prevent distal colon mucosal atrophy caused by disuse in rats with colostomy? An experimental animal study
    Autorzy:
    Atıcı, Ahmet
    Demir, Emel
    Gürsoy, Didar
    Çelikkaya, Mehmet
    Akçora, Bülent
    Powiązania:
    https://bibliotekanauki.pl/articles/1391554.pdf
    Data publikacji:
    2021
    Wydawca:
    Index Copernicus International
    Tematy:
    children
    distal colon mucosal atrophy caused by disuse
    olive oil
    Opis:
    Aim: This study aims to investigate the effects of pure olive oil on mucosal atrophy of the distal colon in rats. Material and methods: The study included 28 male albino Wistar rats weighing 300–350 g. A total of 28 animals were randomly allocated to four groups: group 1: control group (n = 6); group 2: ostomy group (n = 6); group 3: ostomy + saline group (n = 8); group 4: ostomy + olive oil group (n = 8). By definition, group 1 did not undergo any procedure. The same surgical procedure was performed for groups 2, 3, and 4 as described below. In all animals from these groups, a two-centimeter-long mid-line incision was made and the colon was divided into 5 cm sections, measured from the distal colon to the caecum. Proximal and distal stomas were created 2 cm apart in the midline with the use of single-layer interrupted sutures. All rats were kept under close daily observation until they were terminated postoperatively after the 1st month. Animals from group 2 did not undergo any additional procedures, while those fromgroups 3 and 4 were given 2 mL of saline and olive oil twice a day, respectively. At the end of the 1st month, the rats were re-operated through the same approach. Biopsies were taken from the proximal and distal stomas of all rats in the same manner for further histopathological analysis. Results: Group 1 showed no significant differences in terms of mucosal thickness, muscular thickness, wall thickness or colonic lumen diameter between the proximal and distal segments of the colon. Although there were significant differences between the proximal and distal colostomies for each parameter in groups 2, 3, and 4, the mucosal thickness, muscular thickness, wall thickness, and colonic lumen diameter differences for proximal and distal ostomies were very small in group 4 when compared to groups 2 and 3. Conclusion: The administration of pure olive oil through the distal colon before colostomy closure may reduce the difference in diameter between the proximal and distal intestinal segments. As a result, a more straightforward surgical procedure may be achieved.
    Źródło:
    Polish Journal of Surgery; 2021, 93, 4; 35-40
    0032-373X
    2299-2847
    Pojawia się w:
    Polish Journal of Surgery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Surface active agent production from olive oil in high salt conditions and its process optimization
    Autorzy:
    Taran, M.
    Mohamadian, E.
    Asadi, S.
    Bakhtiyari, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/779005.pdf
    Data publikacji:
    2012
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    surface active agent
    olive oil
    optimization
    Taguchi experimental design methodology
    Opis:
    Microbial surfactants or biosurfactants are surface active amphiphilic macromolecules that are produced by a number of microorganisms (bacteria, yeast and fungi). These compounds have extensive application in various industries especially in food, pharmaceutical and oil industry. The aim of this paper is to optimize the culture conditions for the biosurfactant production from olive oil by a novel halophilic isolate microorganism. The Taguchi experimental design methodology based analysis of olive oil as carbon source, yeast extract as nitrogen source and KH2PO4 as phosphorus source revealed that the olive oil and yeast extract signifi cantly affect biosurfactant production in high salt conditions. Maximum biosurfactant (E24= 40%) produced in the presence of 4% (v/v) olive oil, 0.2% (w/v) yeast extract, and 0.002% (w/v) KH2PO4 . In conclusion, halophilic archaeon Haloarcula sp. IRU1 could be a potential microorganism for the production of biosurfactant from olive oil as carbon source in high salt conditions. The optimal parameters obtained during the optimization process were: olive oil 4%, yeast extract 0.4% and KH2PO4 0.004%.
    Źródło:
    Polish Journal of Chemical Technology; 2012, 14, 4; 30-34
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of methylene blue from aqueous solutions with natural olive pomace modified with ultrasounds and acid
    Autorzy:
    Kalipci, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/208148.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    methylene blue
    olive oil
    Freundlich isotherm
    błękit metylenowy
    oliwa z oliwek
    izoterma Freundlicha
    Opis:
    Removal of methylene blue (MB) from aqueous solution by raw olive pomace (ROP) which is a waste of industrial olive oil and olive pomace modified with ultrasounds and acid (MOP) has been investigated. It was found that the data for ROP and MOP were well fit to the Freundlich isotherm model (R2 equal to 0.864 and 0.834, respectively). As a result; it was determined that raw olive pomace can be used for the removal of methylene blue dye (KF = 10.08 mg/g(dm3/mg)1/n) and modified olive pomace had high adsorption capacity for MB (KF = 73.08 mg/g(dm3/mg)1/n).
    Źródło:
    Environment Protection Engineering; 2016, 42, 3; 5-17
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Overall color parameter as a parameter determining the level of oxidation of olive oil
    Autorzy:
    Różańska, Anna
    Namieśnik, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/1179567.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    analytical chemistry
    edible oils
    food analysis
    olive oil
    overall color parameter
    thermal degradation
    Opis:
    Edible fats are an important part of a human daily diet. They have a significant effect on the proper functioning of the human body. During frying, the oil is chemically modified and the fats consumed should have the highest oxidation stability. The subject of the study were samples of olive oil bought at local markets in Gdansk. Samples were heated at 20 °C, 60 °C, 100 °C, 140 °C and 180 °C. The aim of the study was to determine the differences in the level of oxidation of selected edible oils which were heated. Studies were performed using spectrophotometric techniques. The dependence between the level of oxidation of the olive oil samples and the value of the overall color parameter was determined. Based on the results obtained, the lower value of the color parameter overall, means that the oil is more degraded. The used procedure is characterized by an uncomplicated and low cost consuming stage of the preparation of the sample for analysis and also enables rapid analysis.
    Źródło:
    World Scientific News; 2017, 75; 81-88
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late antiquity: the twilight of mouldmade lamps
    Autorzy:
    Motsianos, Ioannis
    Powiązania:
    https://bibliotekanauki.pl/articles/1634114.pdf
    Data publikacji:
    2020-01-03
    Wydawca:
    Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
    Tematy:
    late antiquity
    lighting devices
    mouldmade lamps
    wheel-made lamps
    reproduction
    imitation
    regeneration
    olive oil
    Opis:
    The article examines clay lamp evolution in late antiquity and explores the probable reasons for the dominance of mouldmade lamps during the first Christian centuries and the possible causes which led to their disappearance at the close of late antiquity.
    Źródło:
    Polish Archaeology in the Mediterranean; 2019, 28(1); 73-87
    1234-5415
    Pojawia się w:
    Polish Archaeology in the Mediterranean
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Controlled freeze physics methodology for extra virgin olive oil (EVOO) stabilization
    Autorzy:
    Giannakopoulos, E.
    Zisimopoulos, D.
    Georgiou, C.
    Argyropoulou, K.
    Salahas, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/79863.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    conference
    extra virgin olive oil
    antioxidant capacity
    phenolic compound
    oil quality
    storage
    freezing
    stabilization process
    phenolics
    quality index
    aromatic compound
    free radical
    lipid peroxidation
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 2
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Olive paste fast preheating and the quality of extra virgin olive oil: sensory and chemical markers
    Szybkie ogrzewanie masy oliwkowej i jakość oliwy z oliwek z pierwszego tłoczenia : wskaźniki sensorowe i chemiczne
    Autorzy:
    Boselli, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/271102.pdf
    Data publikacji:
    2015
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
    Tematy:
    extra virgin olive oil
    preheating
    malaxation
    phenolic compounds
    HPLC
    sensory analysis
    consumers' preference
    oliwa z oliwek z pierwszego tłoczenia
    ogrzewanie
    rozcieranie
    związki fenolowe
    analiza sensoryczna
    preferencje konsumentów
    Opis:
    The virgin olive oils (EVOOs) obtained with fast preheating of the olive paste after crushing combined or not with different malaxation periods were studied by means of multivariate statistical elaboration in order to find correlations between the chemical data and the sensory attributes and oxidative stability during a storage period of 12 months. Principal Component Analysis showed that a VOO with high content of simple phenolics compared to the complex phenolics is an oil which has been subjected to oxidation, for instance due to the storage or excessive heat. Based on these results, a new chemical index of 'normalized tyrosols' calculated as the ratio between the sum of concentration of 3,4-dihydroxyphenylethanol (3,4-DHPEA) and 4-hydroxyphenylethanol (p-HPEA) and the sum of total phenols (determined with HPLC) was proposed for the first time. This index is highly positively correlated to primary oxidation (r=0.6941) and inversely related to the oxidative stability (r=-0.6025). In addition, the normalized tyrosols are a good marker of sensory defects of EVOOs.
    Badano oliwę z oliwek z pierwszego tłoczenia (EVOOs) otrzymaną przy szybkim ogrzewaniu masy oliwkowej po rozcieraniu połączonym lub nie z różnym czasem mieszania, za pomocą wielowymiarowego opracowania statystycznego, w celu znalezienia korelacji między danymi chemicznymi a cechami smakowymi oraz odpornością na utlenianie podczas przechowywania przez 12 miesięcy. Analiza głównych składowych wykazała, że VOO z dużą zawartością prostych związków fenolowych, w porównaniu ze złożonymi związkami fenolowymi, jest oliwą podatną na utlenianie, np. podczas długotrwałego przechowywania lub przy nadmiernym ogrzewaniu. Na podstawie otrzymanych wyników zaproponowano znormalizowany indeks tyrozolowy, obliczony jako stosunek sumy stężenia 3,4-dihydroksyfenyloetanolu i 4-hydroksyfenyloetanolu oraz sumy wszystkich fenoli (oznaczonych za pomocą HPLC). Ten indeks jest wprost proporcjonalny do pierwotnego utleniania (r=0,6941) i odwrotnie proporcjonalny do odporności na utlenianie (r=-0,6025). Znormalizowany indeks tyrozolowy jest dobrym wskaźnikiem wad sensorowych EVOOs.
    Źródło:
    Aparatura Badawcza i Dydaktyczna; 2015, 20, 1; 36-45
    2392-1765
    Pojawia się w:
    Aparatura Badawcza i Dydaktyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The role of selected plant products in the prevention of cadmium-induced toxicity®
    Rola wybranych produktów roślinnych w zapobieganiu toksyczności wywołanej przez kadm®
    Autorzy:
    Sitek, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/1522455.pdf
    Data publikacji:
    2021
    Wydawca:
    Wyższa Szkoła Menedżerska w Warszawie
    Tematy:
    cadmium exposure
    oxidative stress
    turmeric
    ginger
    garlic
    onion
    black seeds oil
    olive oil
    blueberry
    green tea
    hibiscus
    ekspozycja na kadm
    stres oksydacyjny
    kurkuma
    imbir
    czosnek
    cebula
    olej z czarnuszki
    oliwa z oliwek
    borówka amerykańska
    zielona herbata
    hibiskus
    Opis:
    Long-term exposure to cadmium (Cd) leads to the development of numerous diseases in human as well as in animals associated with renal and hepatic injury, respiratory, skeletal and cardiovascular disturbances, as well as visual changes, blindness and hearing loss. Cd was classified as human carcinogen (Group 1) by the International Agency for Research on Cancer. The study discusses the effect of selected plant products on reduced toxicity caused by Cd. Animal studies confirmed that the effect of such products as: turmeric, ginger, garlic, onion, black seeds oil, olive oil, blueberry, green tea, hibiscus was efficient in reducing the Cd level in organs and tissues and had positive effect on the urinary tract and cardiovascular, reproductive, nervous, immune and respiratory system. Consumption of these products in occupational and environmental exposure to Cd appears promising.
    Długotrwała ekspozycja na kadm (Cd) ludzi jak i zwierząt, prowadzi do rozwoju wielu zmian patologicznych związanych z uszkodzeniem nerek, wątroby, zaburzeniami w układzie oddechowym, kostnym, sercowo-naczyniowym, a ponadto z zaburzeniami widzenia, ślepotą i niedosłuchem. Cd został zaklasyfikowany przez Międzynarodową Agencję Badań nad Rakiem jako substancja rakotwórcza dla człowieka (Grupa 1). W artykule omówiono potencjalnie korzystny wpływ wybranych produktów roślinnych na zmniejszanie toksyczności wywołanej przez Cd. Badania na zwierzętach wykazały, że spożywanie produktów takich jak: kurkuma, imbir, czosnek, cebula, olej z czarnuszki, oliwa z oliwek, borówka amerykańska, zielona herbata, hibiskus było skuteczne w obniżaniu zawartości Cd w narządach i tkankach oraz korzystnie wpływało na układ krwionośny, moczowy, rozrodczy, nerwowy, odpornościowy i oddechowy. Obiecujące wydaje się zalecanie spożywania tych produktów przy zawodowym i środowiskowym narażeniu na Cd.
    Źródło:
    Postępy Techniki Przetwórstwa Spożywczego; 2021, 1; 79-94
    0867-793X
    2719-3691
    Pojawia się w:
    Postępy Techniki Przetwórstwa Spożywczego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy Valorization of Olive Mill Waste Cake – Extraction of Vegetable Oil and Transesterification
    Autorzy:
    Mehdaoui, Imane
    Majbar, Zineb
    Hassani, El Mokhtar Saoudi
    Mahmoud, Rachid
    Atemni, Ibrahim
    Ben Abbou, Mohamed
    Taleb, Mustapha
    Rais, Zakia
    Powiązania:
    https://bibliotekanauki.pl/articles/24201716.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    olive mill waste cake
    extraction
    valorisation
    vegetable oil
    transesterification
    biodiesel
    Opis:
    The olive mill wastewater, effluents from the trituration of olives, are treated in most Mediterranean countries by natural evaporation. However, this method of treatment is a source of air and soil pollution by the generation of solid waste, called olive mill waste cake. This work focused on extracting of vegetable oil from this by-product for biodiesel production by transesterification. The extraction took place with a Soxhlet extractor, using hexane as solvent. The vegetable oil and biodiesel were characterized by measuring the physicochemical parameters that identify them according to AFNOR standards. The extraction results show that the oil yield is 21.28%. The oil obtained is characterized by density, water and ash content, acidity, saponification, peroxide and ester. The yield of the oil esterification reaction is 86.41% or about 185 Kg of biodiesel/ton of olive mill waste cake, and in terms of energy 2783.7 MJ or 2 GW.t-1. The biodiesel produced is comparable to petroleum diesel according to EN 14214, 2013.
    Źródło:
    Journal of Ecological Engineering; 2023, 24, 5; 306--315
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of selected vegetable oils on the properties of acrylonitrile-butadiene rubber vulcanizates
    Wpływ dodatku wybranych olejów roślinnych na właściwości wulkanizatów kauczuku akrylonitrylo-butadienowego
    Autorzy:
    Khalaf, A. I.
    Ward, A. A.
    Abd El-Kader, A. E.
    El-Sabbagh, S. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/947018.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    vegetable oils (olive and orange oil)
    acrylonitrile-butadiene rubber
    aging resistance
    mechanical properties
    dielectric properties
    oleje roślinne (oliwkowy i pomarańczowy)
    kauczuk akrylonitrylo-butadienowy
    odporność na starzenie
    właściwości mechaniczne
    właściwości dielektryczne
    Opis:
    In this study, we study if vegetable oils such as olive and orange oil, which are natural products devoid of any toxic effects, can function as multipurpose additives (processing aids, plasticizers and antioxidants) in acrylonitrile-butadiene rubber (NBR) containing 20 phr of carbon black (HAF). Dioctyl phthalate (DOP) and polymerized 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ) were used as a reference plasticizer and antioxidant respectively. Rheometric and swelling characteristics were studied. The mechanical and dielectric properties before and after thermo-oxidative aging for different time periods up to 264 h at 100 °C were also studied. The physico-mechanical results indicated that olive and orange oils impart good mechanical properties to NBR vulcanizates. Furthermore, they improve aging resistance and increase hardness. Dielectric relaxation spectra were used to study the relaxation behavior of these samples as function of frequency (0.1 Hz to 5 MHz) at different temperatures. The obtained data were interpreted on the basis of electrode polarization and provide evidence that the recorded relaxation phenomena include contributions from both the polymeric matrix and the presence of the reinforcing phase. According to the available mechanical and electrical results, it is suggested that olive and orange oils may be used as multipurpose additives in nitrile rubber.
    Badano możliwość zastosowania naturalnych, nietoksycznych olejów roślinnych — oleju z oliwek i oleju z pomarańczy — jako wielofunkcyjnych dodatków (substancji pomocniczych, plastyfikatorów, przeciwutleniaczy) do kauczuku akrylonitrylo-butadienowego (NBR), zawierającego 20 phr sadzy węglowej (HAF). Porównawczo, w kompozycjach użyto ftalanu dioktylu (DOP) i polimeryzowanej 2,2,4-trimetylo-1,2-dihydrohinoliny w charakterze, odpowiednio, plastyfikatora i przeciwutleniacza. Wyznaczono charakterystykę reometryczną i pęcznienia próbek wytworzonych wulkanizatów, ponadto badano ich mechaniczne oraz dielektryczne właściwości przed i po starzeniu termiczno-oksydacyjnym wciągu 264 hw temp. 100 °C. Wyniki wykazały, że oleje oliwkowy i pomarańczowy korzystnie poprawiają właściwości fizyko-mechaniczne wulkanizatów NBR, ponadto zwiększają odporność na starzenie oraz twardość. Na podstawie polaryzacji elektrodowej oceniono też przebieg procesu relaksacji wytworzonych próbek w funkcji częstotliwości (od 0,1 Hz do 5 MHz) w różnej temperaturze. Stwierdzono, że obserwowane procesy relaksacyjne dotyczą zarówno matrycy polimerowej, jak i składników wzmocnienia.
    Źródło:
    Polimery; 2015, 60, 1; 43-56
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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