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Wyszukujesz frazę "Nanocomposites" wg kryterium: Temat


Tytuł:
Characterization of ferromagnetic composite materials for biomedical applications
Autorzy:
Fedotova, J.
Wójcik, M.
Powiązania:
https://bibliotekanauki.pl/articles/284640.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanokompozyty
nanocomposites
Opis:
The great technological development in materials engineering together with quantum mechanical effect called giant magnetoresistance (GMR) observed in thin film structures composed of alternating ferromagnetic and nonmagnetic metal layers have evolved to the point where their synergistic combination have culminated in a new field of multidisciplinary research and in new applications. Paper shows results of investigations of nanocomposites consisting of magnetic metallic (alloy) nanoparticles (MMNPs) embedded in a dielectric matrix (like SiO2 or Al2O3). The studied (Fe0.45Co0.45Zr0.10)x(Al2O3)100-x(17
Źródło:
Engineering of Biomaterials; 2007, 10, no. 69-72; 6-7
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary investigation of alginate fibers modified with magnetite
Autorzy:
Frączek-Szczypta, A.
Piecek, A.
Boguń, M.
Błażewicz, S.
Powiązania:
https://bibliotekanauki.pl/articles/284612.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
fibers
biomaterials
Opis:
In this work alginate nanocomposite fibers modified with magnetite were investigated as prospective material for bone tissue regeneration after tumor resection. In the first stage of the research the morphology of composite fibers and their chemical composition were evaluated. Determination of the mechanical properties of the nanocomposite materials indicated that magnetite does not improve the strength of the nanocomposites. A slight increase of Young’s modulus was observed only for composite fibers with a lower concentration of nanoadditive. Weekly and monthly incubation of fibers in distilled water indicates the release of magnetite from the material. This result is optimistic in terms of the applicability of these materials, not only for tissue regeneration, but also to destroy cancer cells using the external magnetic field.
Źródło:
Engineering of Biomaterials; 2011, 14, no. 106-108; 17-20
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation and characterization of polyoxymethylene/functionalized hydroxyapatite nanocomposites
Autorzy:
Król-Morkisz, K.
Pielichowska, K.
Powiązania:
https://bibliotekanauki.pl/articles/284950.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polyoxymethylene
nanocomposites
copolymers
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 56
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and characterization of graphene-loaded chitosan hydrogels with cross-linking gradient
Autorzy:
Kosowska, K.
Domalik-Pyzik, P.
Chłopek, J.
Powiązania:
https://bibliotekanauki.pl/articles/285566.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
chitosan
nanocomposites
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 40
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature dependence of cyclic behavior of poly (lactic acid)/hydroxyapatite nanocomposites
Autorzy:
Dusunceli, N.
Powiązania:
https://bibliotekanauki.pl/articles/285188.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
polymers
biodegradation
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 88
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioactivity and stability studies of POM/HAp nanocomposites
Autorzy:
Pielichowska, K.
Stodolak, E.
Powiązania:
https://bibliotekanauki.pl/articles/286002.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
bioactivity
stability
Źródło:
Engineering of Biomaterials; 2010, 13, no. 99-101; 1-2
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polylactide - carbon nanotubes nanocomposites as membranes for guided nerve regeneration (GNR)
Autorzy:
Stodolak-Zych, E.
Frączek-Szczypta, A.
Błażewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/285045.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
membranes
nerve regeneration
Opis:
New generation of membrane materials can play role in regeneration process in living organism e.g. creation of optimal conditions for regeneration of bone tissue (GBR/GTR technique) or defected peripheral nerve (GNR technique). However, biodegradable polymeric materials which are now widely used in GNR technique (PLA, PCL, collagen) does not have satisfactory mechanical properties such as strength (RM) or Young's modulus (E) because it is difficult to control their porosity [1,2]. Materials suitable for nerve regeneration should exhibit electrical properties which stimulate the regeneration [3]. The main idea of the guided nerve regeneration is utilisation of a membrane separating two tissues i.e. defected nerve tissue and connective tissue. Inside the defected nerve tissue surrounded by the membrane should be present factors influencing the regeneration process such as: ECM protein, nervotrofic factors. On the other hand, the membrane should act as a barrier for fibroblast cells inflowing into the defected area. The work presents results of investigations on porous nanocomposite materials basing on bioresorbable aliphatic polyesters i.e. poly-(L/DL)-lactide and carbon nanotubes (CNT). All materials i.e. nanocomposite foils and porous materials were prepared using synthetic co-polymer of L/DL-lactide with L/DL ratio of 80/20 from Purac®. The polymer had the FDA attestation confirming its biocompability. As the nanofillers, two types of CNTs produced by Nanostructured and Amorphous Materials (Inc. Huston, USA) were used: MWCNTs (multi-wall carbon nanotubes; diameter 10-30 nm and length 1-2 μm) and SWCNTs (single-wall carbon nanotubes; diameter 0.7-2 nm and length 15-30 μm). Nanocomposite membrane materials (PLDLA/0.5% wt. MWCNTs and PLDLA/0.5% wt. SWCNTs) were prepared using combined methods: phase inversion and freeze-drying. Porous microstructure of the nanocomposites was investigated using SEM/EDS. It was found, that the presence of the CNT influenced shape, size (5-50 μm) and distribution of pores in the material (total porosity of PLDLA/ MWCNTs was about ~65% and PLDLA/S WCNTs was about ~35%). The nanoadditives increased mechanical properties of the membrane materials. For example addtition of the SWCNTs increased the membrane strength (RM) form 16 to 24 MPa. Physicochemical properties of the materials surface were investigated by means of wettability and surface energy measurements. It was shown that dispersion part of surface free energy decreased when SWCNTs were used as additives (from 4.5 mm/mJ PLDLA membrane to 0.7 mm/mJ PLDLA/SWCNTs), while in the case of the MWCNTs addition dispersion part of surface energy increased from 4.5 mm/mJ to 6.9 mm/mJ. Such PLDLA-based materials modified with CNTs (MWCNTs, SWCNTs) may be an attractive support for adhering cells. SWCNTs were more suitable nanoad- ditives for PLDLA-matrix membranes than MWCNTs, because such membranes were stronger, hydrophilic and much more bioactive.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 139-140
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon nanocomposite membrane with bioactive fillers
Autorzy:
Stodolak-Zych, E.
Szatkowski, P
Błażewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/285168.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
membranes
bioactive fillers
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 57
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Naturally-derived hydrogels and nanocomposites as building blocks of scaffolds for tissue regeneration
Autorzy:
Stancu, I. C.
Drăgușin-Zakman, D. M.
Serafim, A.
Cecoltan, S.
Lungu, A.
Vasile, E.
Powiązania:
https://bibliotekanauki.pl/articles/284242.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
nanocomposites
tissue regeneration
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 8
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanokompozyty z grafenem: wytwarzanie, właściwości i znaczenie w budownictwie
Nanocomposites with graphene: preparation, properties and role in construction engineering
Autorzy:
Trzaska, Zdzisław
Trzaska, Maria
Powiązania:
https://bibliotekanauki.pl/articles/460804.pdf
Data publikacji:
2016-09
Wydawca:
Mazowieckie Biuro Planowania Regionalnego w Warszawie
Tematy:
nanokompozyty
grafen
Nanocomposites
graphene
Opis:
Znaczący postęp w rozwoju nowych technologii, w tym inżynierii materiałowej, jaki się dokonał w ubiegłym dwudziestoleciu stawia obecnie projektowanie nowych konstrukcji i urządzeń w świetle wymagań dotąd niemożliwych do spełnienia.. Konstrukcje i urządzenia wykonane z użyciem nanotechnologii całkowicie spełniają wysokie wymagania wytrzymałościowe i kreują postęp techniczny. Nanokompozyty są materiałami wyjątkowo korzystnymi, pod wieloma względami, i efektywnie stosowanymi w praktycznej realizacji złożonych konstrukcji oraz w inżynierii powierzchni. Spełnienie wciąż rosnących wymagań w stosunku do bardzo obciążonych konstrukcji, szczególnie w budownictwie, przemyśle samochodowym i lotniczym, coraz intensywniej wymuszają stosowanie materiałów jednocześnie lekkich, wytrzymałych, niezawodnych i odpornych na działanie środowiska naturalnego. Na przeciw takim wymaganiom wychodzą nanokompozyty o różnych osnowach i z grafenem jako fazą rozproszoną. Właściwości wybranych nanokompozytów z grafenem, metody ich wytwarzania i potencjalne obszary zastosowania stanowią przedmiot rozważań przedstawionych w referacie. Szczególna uwaga jest poświęcona nakompozytom metal/grafen, polimery/grafen, beton/grafen i nanokrystalicznej celulozie.
Significant progress in the development of new technologies, including materials science that has been made in the past two decades puts the current design of new structures and facilities in the light of the requirements are impossible to meet the ever. Structures and devices made using nanotechnology fully meet high strength requirements and create technical progress. Nanocomposites are materials extremely favorable, in many respects, and effectively used in the practical implementation of complex structures and surface engineering. Meeting growing requirements for a heavily loaded structures, particularly in construction, automotive and aerospace industries, increasingly necessitate the use of materials simultaneously light, strong, reliable and resistant to the environment. For such demands go against nanocomposites with different matrices and graphene as the dispersed phase. The properties selected from graphene nanocomposites, methods for their preparation and potential areas of application are the subject of the considerations set out in the paper. Particular attention is devoted to nanocomposites: metal/graphene, polymers/graphene, concrete/graphene and nanocrystalline cellulose.
Źródło:
MAZOWSZE Studia Regionalne; 2016, 19; 223-245
1689-4774
Pojawia się w:
MAZOWSZE Studia Regionalne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of Some Optical Properties of Polystyrene - Copper Nanocomposite Films
Autorzy:
Kadhim, Raheem Gaayid
Powiązania:
https://bibliotekanauki.pl/articles/1192701.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
nano Copper
nanocomposites
polystyrene
Opis:
The effect of addition of nano Cu on some optical properties of polystyrene has been studied. For this purpose, many samples have been prepared by adding nano Cu to the polystyrene with different Weight percentages and different thickness. The absorption spectra have been recorded at the wavelength ranges (220-800 nm). The absorption coefficient, extinction coefficient and energy gap of the indirect allowed and forbidden transition have been determined. Results show that the absorption coefficient and extinction coefficient increase and the energy gap of the indirect allowed and forbidden transition decreases with the wt. % content of nano Cu.
Źródło:
World Scientific News; 2016, 30; 14-25
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and characterization of novel chitosan nanocomposite hydrogels for drug delivery and bone tissue engineering
Autorzy:
Pazdan, K.
Pielichowska, K.
Chłopek, J.
Powiązania:
https://bibliotekanauki.pl/articles/285119.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
tissue engineering
hydrogels
Opis:
Biodegradable materials for drug delivery and bone tissue engineering are currently intensively developing and improving, but there are still a lot of problems to solve related with bioactivity, biocompatibility, release profile etc. Osteosarcoma is an aggressive malignant neoplasm arising from primitive transformed cells of mesenchymal origin that exhibit osteoblastic differentiation and produce malignant osteoid. It is the most common histological form of primary bone cancer [1,2]. Treatment is most destinations and made up for: intensive multidrug short induction chemotherapy, amputation or tumor resection within the limits of normal tissue and in the last phase again chemotherapy. This kind of neoplasm is most recently detected in young male till 25 age, therefore improving methods of treatment is so important. Chitosan is a natural-based polymer obtained by alkaline deacetylation of chitin received from powdered shrimp shells was purchased from Acros Organics. Its main advantages are non-toxic, non-immunogenic, non-carcinogenic degradation products, biocompatible, bioactive and biodegradable. These properties cause chitosan a very good candidate for novel hydrogel drug delivery systems. Chitosan easily forms hydrogel particles and entraps biomolecules through a number of mechanisms, including chemical crosslinking, ionic crosslinking, and ionic complexation [3,4]. A possible alternative of chitosan by the chemical modification also has been useful for the association of bioactive molecules to polymer and controlling the drug release profile. There are few methods of modification, or example.: copolimerization, grafting, chemical and ionic crosslinking, polyelectrolyte complexes, etc [5]. Previous studies demonstrated that chitosan could promote the proliferation and osteogenesis but only with moderate swelling ratio of composite, too high ability of entrapment water solutions are not recommended. There are a lot of advantages in chitosan properties that can be used in research work to obtain the material of the best expected properties. Laponite® (LA) is a plate-like synthetic clay hectoritetype belongs to a family of phyllosolicates type 2:1 [6]. Its structure represent empirical formula: Na0.7+[Si8Mg5.5Li0.3 O20(OH)4]0.7-. The plates size is about 25 nm x 0,92 nm. LA has a large surface area, anionic surface charges and exchangeable Na+ cations in hydrated interlayers. Presence of sodium cations causes better adsorption properties for cationic drug molecules. Moreover, the exfoliated LA particles may act as multifunctional crosslinkers in forming the nanocomposite hydrogels, and the polymer chains were anchored to the particles and entangled to form a network [7]. Used synthetic clay has got the same type structure and but better sorption properties to montmorillonite but it has got serious advantage - as a synthetic compound shows low heavy metal content. The initial results indicate that the incorporation of clay improved the swelling behavior in contrast to the pure chitosan beads. There also had been revealed significant disproportion of viscosity received hydrogels according to different type of LA or different concentration. Increasing content causes telling rise of viscosity, especially reported in higher content of used crosslinker. The aim of research is to develop a bioactive system biopolymer/layered silicate intelligent nanocomposite based on chitosan and synthetic clay by a cross-linking reaction using sodium tripolyphosphate as the gel factor. The resultant composite were characterized by Fourier transform infrared spectroscopy, scanning electronic microscope and X-ray diffraction analysis. The bioactivity in physiological pH solution (SBF pH=7.40) [8], drug encapsulation efficiency and controlled release behaviour were also investigated by using the model drug to reveal the effects of introduced LA.
Źródło:
Engineering of Biomaterials; 2013, 16, no. 122-123 spec. iss.; 1-2
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanocomposite membranes obtained by a hot pressing method
Autorzy:
Stodolak-Zych, E.
Sas, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/283974.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bone defects
membranes
nanocomposites
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 56
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chitosan-based nanocomposites modified with reduced graphene oxide prepared via green synthesis
Autorzy:
Kosowska, K.
Domalik-Pyzik, P.
Jagiełło, J.
Lipińska, L.
Chłopek, J.
Powiązania:
https://bibliotekanauki.pl/articles/284680.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
graphene oxide
green synthesis
Źródło:
Engineering of Biomaterials; 2017, 20, no. 143 spec. iss.; 59
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioinspired nanocomposite structures for bone tissue regeneration based on collagen, gelatin, polyamide and hydroxyapatite
Autorzy:
Suchy, T.
Balik, K.
Supova, M.
Hruskova, D.
Sucharda, Z.
Cerny, M.
Sedlacek, R.
Powiązania:
https://bibliotekanauki.pl/articles/286173.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
nanocomposites
bone tissue regeneration
biomaterials
Źródło:
Engineering of Biomaterials; 2009, 12, no. 89-91; 13-15
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł

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