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Tytuł:
Synthesis and Kinetic Study of a PCL-GAP-PCL Tri-block Copolymer
Autorzy:
Chizari, M.
Bayat, Y.
Powiązania:
https://bibliotekanauki.pl/articles/358140.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
poly(glycidyl azide)
poly(caprolactone)
copolymer
kinetic study
activation energy
Opis:
An energetic tri-block copolymer PCL-GAP-PCL (Mn = 1794) was synthesized by a ring-opening polymerization of ε-caprolactone with glycidyl azide polymer (GAP) of low molecular weight (Mn = 1006 g/mol) as initiator, in the presence of dibutyltin dilaurate (DBTDL) as catalyst, at 100 °C in the absence of solvent. The products obtained in high yield were characterized by FTIR, gel permeation chromatography (GPC), and 1H and 13C NMR spectroscopy. Thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) were used to study the thermal behaviour of the polymers. An advanced isoconversional method has been applied for kinetic analysis. The activation energy, calculated by the Flynn-Wall-Ozawa (FWO) and Kissinger methods, and thermal analysis revealed that the tri-block copolymer has greater thermal stability than homopolymer GAP. The results of the activation energies from the Kissinger method for the first and second steps were 180.3 kJ·mol−1 and 209.8 kJ·mol−1, respectively. Furthermore, for the copolymer, the activation energy versus the level of conversion was calculated by the FWO method. The glass transition temperature (Tg) for GAP was influenced by the PCL blocks; as a result the copolymer (Tg = −64 °C) showed better thermal properties than homopolymer GAP (Tg = −48 °C).
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 2; 243-257
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological property poly(ε- caprolactone) as potential material for reproduction devices
Autorzy:
Wieczorek, R.
Stodolak-Zych, E.
Kosenyuk, Y.
Powiązania:
https://bibliotekanauki.pl/articles/284532.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
poly(ε-caprolactone)
reproduction
biomaterials
Opis:
The main limitation of embryos transfer is the lack of catheters for their obtaining and transferring which would have desirable and confirmed biological properties ensuring high bioconcordance and low toxicity. Catheters used routinely for embryos obtaining and transfer are tools used for insemination, urology and other medical purposes, but their bioconcordance with embryos was never confirmed. For these reasons in our studies we attempted to develop the modern set of catheters designed for the contact with embryos, based on the biomaterial characterized by good biological and mechanical properties such as with optimal resilience and elastic properties, and capable to be free shaped in the form of a tube of 1-2 mm diameter. The material which hypothetically fulfills biological requirements and at the same time gives possibility of free shaping is resorbable polymer used for the long time in many fields of medicine is poly-ε-caprolactone (PCL). Because of its biological and physical properties it was taken into consideration to use this biomaterial for in vitro embryos culture and for cryoconservation. The aim of the study was verification of biological properties of poly-ε-caprolactone (PCL) as the material dedicated to biotechnology of animal reproduction and gynecology and evaluation of possibility of poly-ε-caprolactone (PCL) application as a potential material for production of medical devices, as catheters for obtaining and transporting of embryos as well as dishes for embryos culture in vitro and covers for cryoconservation. The possible application of this biomaterial needs verification of its biological properties on embryos culture. The foil discs made of the polycaprolactone, thickness 0.5 mm, diameter 3.5 mm, were prepared in two forms: the reference one (nPCL) and thermally modified by freezing in liquid nitrogen (mPCL). The verification of PCL bioconcordance was performed by evaluation of 102 pig embryos at the development stage of 2 to 4 blastomers. To evaluate poly-ε-caprolactone bioconcordance 5-day long culture of the embryos was performed on the evaluating material, not frozen (nPCL) and frozen in liquid nitrogen (mPCL) and additionally culture after short contact with poly-ε-caprolactone lasting 15 minutes (nPCL-15). In all evaluated study groups the development of embryos was suppressed shortly after transfer to the culture with PCL. In the control group 74-78% of the embryos reached blastocyst stage. Because of cytotoxic influence of polycaprolacton on embryos it cannot be used as the material for catheter production used in biotechnology of animal reproduction and other materials used for in vitro culture and cryoconservation.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 140
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using polymers: utopia or reality?
Autorzy:
Dubruel, P.
Desmet, T.
Vlierberghe, S. van
Musial, O.
Cornelissen, R.
Declercq, H.
Berneel, E.
Powiązania:
https://bibliotekanauki.pl/articles/284926.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polymers
medicine
poly(ε-caprolactone)
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 123
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of bioactive glass particle size on properties of poly(ε-caprolactone) based membranes
Autorzy:
Dziadek, M.
Zagrajczuk, B.
Pukas, K.
Cholewa-Kowalska, K.
Powiązania:
https://bibliotekanauki.pl/articles/284146.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
bioactive glasses
membranes
poly(ε-caprolactone)
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 66
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Poly(ε-caprolactone) as potential material for catheters to xenogeneic transplantations and embryologic devices
Autorzy:
Stodolak-Zych, E.
Wieczorek, J.
Para, U.
Powiązania:
https://bibliotekanauki.pl/articles/284854.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
transplantation
poly(ε-caprolactone)
embryologic devices
Opis:
The paper presents study performed to investigate the possible use of modified poly(ε-caprolactone) as a potential material for catheters. Experiment verifies if thermal modification using liquid nitrogen (LN) changes microstructure, biostability, mechanical and physicochemical properties of polymer. The easiness of forming material into tubes to confirm handiness was checked.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 111-114
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Needle-punched fibrous polycaprolactone scaffold for bone tissue engineering
Autorzy:
Rajzer, I.
Grzybowska-Pietras, J.
Fabia, J.
Sarna, E.
Powiązania:
https://bibliotekanauki.pl/articles/284522.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
needle-punched nonwovens
scaffold
hydroxyapatite
poly(ε-caprolactone)
Opis:
In the present work a three dimensional composite scaffolds for bone tissue engineering were created by a carding and needle-punch processes. Highly porous nonwoven fabrics were obtained from PCL and PCL/n-HAp cut fibers without the use of any chemicals during the manufacturing process. The properties of nonwoven scaffolds were examined by SEM, FTIR, DSC and TGA methods. The average pore diameter as well as the pore size distribution of nonwoven fabrics were measured by a capillary flow porometry. The obtained results suggest that needle-punching method can be used to produce highly porous microstructures with an interconnected pore network.
Źródło:
Engineering of Biomaterials; 2013, 16, 121; 2-5
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New homogeneous blends of dibutyrylchitin and aliphatic polyesters
Autorzy:
Sobecki, Paweł P.
Pabin-Szafko, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/1035501.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
biodegradable polyester
blends
dibutyrylchitin
poly(ε-caprolactone)
polylactide
Opis:
The results of physical modification of dibutyrylchitin (DBCH) for the purpose of improvement of its imperfect mechanical properties are presented. Thus, the novel blends of DBCH and biodegradable aliphatic copolymer derived from ε-caprolactone, L-lactide and glycolide (PCLG) in various proportions were prepared and examined. DBCH/PCLG blends with PCLG contents between 6 - 50 wt% were successfully prepared in film form with the thickness in the range of 10 - 500 μm. The morphology of these blend films was studied by means of differential scanning calorimetry and infrared spectroscopy. DBCH was found to be able to form miscible blends with PCLG polyester within the whole composition range studied; revealed that blends were composed of an amorphous homogeneous phase as evidenced by the presence of a single glass transition temperature, that to decrease with increasing PCLG content in materials. Furthermore, physical modification of DBCH with polyester resulted in superior mechanical properties – the blended materials exhibited a much higher toughness and elongation at break as well as a lower value of elasticity modulus.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2010, 15; 47-54
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Verification of biological properties of poly-ε-caprolacton (PCL) as the material dedicated to medicine and biotechnology
Autorzy:
Wieczorek, J.
Grad, I.
Stodolak-Zych, E.
Kosenyuk, Y.
Powiązania:
https://bibliotekanauki.pl/articles/285736.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
embryos
poly(ε-caprolactone) (PCL)
culture
catheters
pigs
Opis:
The aim of the study was evaluation of possibility of poly-ε-caprolacton (PCL) application as potential material for production of medical devices, as catheters for obtaining and transporting of embryos as well as dishes for embryos culture in vitro and covers for cryoconservation. The possible application of this biomaterial needs verification of its biological properties on embryos culture. The foil discs made of policaprolacton, thickness 0.5 mm, diameter 3.5 mm, were prepared in two forms: the baseline one (nPCL) and thermally modified by freezing with liquid nitrogen (mPCL). The verification of PCL bioconcordance was performed by evaluation of 102 pig embryos. To evaluate poly-ε-caprolacton bioconcordance we performed 5-day long culture of embryos on the evaluated material, not frozen (nPCL) and frozen in liquid nitrogen (mPCL) and additionally culture after short contact with poly-ε-caprolacton, lasting 15 minutes (nPCL-15). In all evaluated study groups the development of embryos was suppressed shortly after transfer to the culture with PCL. In the control group. 74%-78% of embryos reached blastocyst stage. Polycaprolacton cannot be used as the material for catheter production used in biotechnology of animal reproduction and other materials used for in vitro culture and cryoconservation.
Źródło:
Engineering of Biomaterials; 2013, 16, no. 122-123 spec. iss.; 66-68
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemical characteristics of chitin-polyester systems in dependence on their composition
Autorzy:
Sobecki, Paweł P.
Pabin-Szafko, Barbara
Szumilewicz, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/1035429.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
biodegradable
blends
dibutyrylchitin
poly(ε-caprolactone)
polyesters
polylactide
Opis:
In order to improve the properties of their individual components, the compositions of dibutyrylchitin (DBC) and aliphatic polyesters (PCLG) were prepared and examined. The studied systems are homogeneous in a wide range of composition and molar masses of their components. The homogeneities of the blends made it possible to form smooth and transparent films, which were investigated by mechanical testing. It was found that the chemical structure and molar mass of a polyester component had an effect on mechanical properties of the systems. The films were subjected to hydrolytic degradation in media of various pH values (4.0, 7.4 and 13.0) at 37 °C. Furthermore, it was found that the molar mass and composition of the PCLG component clearly affected the rate of hydrolysis of the studied systems. The effect of hydrophilicity of the DBC/PCLG blends on degradation rate was also investigated. Consequently, by an appropriate choice of the components it is possible to control the profile of hydrolytic degradation of the DBC/PCLG systems.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2011, 16; 23-30
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biodegradation of poly(ε-caprolactone) in natural water environments
Autorzy:
Heimowska, A.
Morawska, M.
Bocho-Janiszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/949393.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
biodegradation
poly(ε-caprolactone)
fresh water
sea water
pond
Opis:
The environmental degradation of poly(ε-caprolactone)[PCL] in natural fresh water (pond) and in The Baltic Sea is presented in this paper. The characteristic parameters of both environments were measured during experiment and their influence on the biodegradation of the samples was discussed. The loss of weight and changes of surface morphology of polymer samples were tested during the period of incubation. The poly(ε-caprolactone) was more biodegradable in natural sea water than in pond. PCL samples were completely assimilated over the period of six weeks incubation in The Baltic Sea water, but after forty two weeks incubation in natural fresh water the polymer weight loss was about 39%. The results have confirmed that the investigated polymers are susceptible to an enzymatic attack of microorganisms, but their activity depends on environments.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 1; 120-126
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of innovative biopolymers designed for bone regeneration applications and in vitro study of their biocompatibility and osteogenic capacity on human bone marrow mesenchymal stem cells
Autorzy:
Basile, M. S.
Gomez d'Ayala, G.
Laurienzo, P.
Malinconico, M.
Oliva, A.
Powiązania:
https://bibliotekanauki.pl/articles/284365.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
functionalization of poly(ε-caprolactone)
bone marrow mesenchymal stem cells
Opis:
In the frame of a project aiming to the improvement of the properties of biodegradable polyester-based devices, designed for bone regeneration, we have prepared and characterized novel composites based on poly(ε-caprolactone) (PCL). In particular, we report in this paper the functional changes made through radical grafting on PCL to obtain the less hydrophobic derivatives, PCL-MA-GMA [maleic anhydride (MA)-glycidylmethacrylate (GMA)] and PCL-DMAEA [N-(dimethyl-amino)ethylacrylate]. In addition, we studied in vitro the biocompatibility and the osteogenic capacity of these novel polyesters on human bone marrow (BM) mesenchymal stem cells (MSC).
Źródło:
Engineering of Biomaterials; 2012, 15, 113; 13-15
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of porogenes in production of porouspolymers by supercritical foaming
Autorzy:
Sawicka, Katarzyna
Kosowska, Katarzyna
Henczka, Marek
Powiązania:
https://bibliotekanauki.pl/articles/185217.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tissue engineering
supercritical fluids
foaming
poly(ε-caprolactone)
porogenes
inżynieria tkankowa
płyny nadkrytyczne
Opis:
Biocomposite foam scaffolds of poly(ε-caprolactone) (PCL) with different porogenes were producedwith batch foaming technique using supercritical carbon dioxide (scCO2)as a blowing agent. Inperformed experiments composites were prepared from graphene-oxide (nGO), nano-hydroxyapatite(nHA) and nano-cellulose (nC), with various concentrations. The objective of the study was to explorethe effects of porogen concentration and foaming process parameters on the morphology and me-chanical properties of three-dimensional porous structures that can be used as temporary scaffolds intissue engineering. The structures were manufactured using scCO2as a blowing agent, at two variousfoaming pressures (9 MPa and 18 MPa), at three different temperatures (323 K, 343 K and 373 K) fordifferent saturation times (0.5 h, 1 h and 4 h). In order to examine the utility of porogenes, a number oftests, such as static compression tests, thermal analysis and scanning electron microscopy, have beenperformed. Analysis of experimental results showed that the investigated materials demonstrated highmechanical strength and a wide range of pore sizes. The obtained results suggest that PCL porousstructures are useful as biodegradable and biocompatible scaffolds for tissue engineering.
Źródło:
Chemical and Process Engineering; 2019, 40, 1; 115--122
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ poli(ε-kaprolaktonu) na ekspresję i aktywność fosfatazy alkalicznej w ludzkich komórkach osteogennych
The effect of poly(ε-caprolactone) on the expression and activity of alkaline phosphatase in human osteogenic cells
Autorzy:
Leszczyńska, J.
Wójtowicz, J.
Olkowski, R.
Komasa, J.
Ulański, P.
Lewandowska-Szumieł, M.
Powiązania:
https://bibliotekanauki.pl/articles/286189.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
poli(ε-kaprolakton)
osteoblasty
fosfataza zasadowa
różnicowanie
poly(ε-caprolactone)
osteoblasts
alkaline phosphatase
differentiation
Opis:
Poli(ε-kaprolakton) jest materiałem wykorzystywanym jako rusztowanie dla komórek w inżynierii tkankowej kości. Na podstawie danych z literatury oraz naszych własnych badań nad reakcją komórek osteogennych na bezpośredni kontakt z poli(ε-kaprolaktonem) można przypuszczać, iż materiał ten może wpływać na poziom markerów różnicowania komórek w kierunku osteoblastów. Celem niniejszej pracy było zbadanie wpływu poli(ε-kaprolaktonu) na ekspresję oraz aktywność wczesnego markera procesu różnicowania komórek osteogennych, jakim jest fosfataza zasadowa. Przy użyciu reakcji łańcuchowej polimerazy DNA z analizą ilości produktu w czasie rzeczywistym (real-time PCR) analizowano ekspresję genu fosfatazy zasadowej natomiast aktywność enzymu oznaczono kolorymetrycznym testem firmy Sigma. Otrzymane wyniki wskazują, iż kontakt ludzkich osteoblastów z powierzchnią poli(ε-kaprolaktonu) powoduje podwyższoną ekspresję genu fosfatazy zasadowej oraz podwyższoną aktywność tego enzymu. Fosfataza zasadowa nie jest specyficznym markerem osteoblastów, jednakże jej podwyższony poziom towarzyszy wczesnym etapom różnicowania w kierunku fenotypu komórek osteogennych. Uzyskane wyniki uzasadniają podjęcie dalszych badań nad możliwym wpływem poli(ε-kaprolaktonu) na różnicowanie osteoblastów.
Poly(ε-caprolactone) is a material used as a scaffold for cells in bone tissue engineering. On the basis of data from literature as well as own research it was concluded that this material can influence the levels of markers of cell differentiation towards osteoblasts. The aim of this paper was to investigate the effect of poly(ε-caprolactone) on the expression and the activity of the early marker of the cell osteogenic differentiation process – alkaline phosphatase (ALP). Using the quantitative real time polymerase chain reaction (real-time PCR) gene expression of the alkaline phosphatase was analyzed; however, the activity of the enzyme was determined with colorimetric assay from the Sigma company. The obtained results indicated that the contact of human osteoblasts with the surface of poly(ε-caprolactone) causes an increased gene expression of alkaline phosphatase and an increased activity of this enzyme. Although a high level of ALP does not prove the PCL influence on the osteogenic differentiation of cells into mature osteoblasts, because this enzyme is a non-specific marker of the differentiation process. The obtained results justify undertaking further studies on the possible impact of poly(ε-caprolactone) on osteoblast differentiation.
Źródło:
Engineering of Biomaterials; 2011, 14, 103; 13-16
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ kompatybilizatora na właściwości termiczne kompozytów na bazie polilaktydu naświetlanych promieniowaniem UV-C
Effect of a compatibilizong agent on thermal properties of polylactide-based composites exposed to UVC radiation
Autorzy:
Olewnik-Kruszkowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/278902.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
polilaktyd
montmorylonit
poli(ε-kaprolakton)
degradacja UV
polylactide
montmorillonite
poly(ε-caprolactone)
UV degradation
Opis:
Folie zawierające polilaktyd jako osnowę polimerową, montmorylonit jako napełniacz oraz poli(ε-kaprolakton) jako kompatybilizator naświetlano promieniowaniem UV-C (max 254nm) w odstępach dwu godzinnych do 16 godzin. Wpływ napełniacza oraz obecności kompatybilizatora na proces fotodegradacji analizowano przeprowadzając badania właściwości termicznych, zarówno wyjściowych materiałów jak i po różnych czasach ekspozycji na UV. Pod uwagę brano między innymi następujące parametry: stabilność termiczną, temperaturę zeszklenia czy stopień krystaliczności. Otrzymane wartości wskazują, iż wprowadzenie poli(ε-kaprolaktonu) jak i montmorylonitu powoduje wzrost stopnia krystaliczności materiałów, co jest jednym z kluczowych czynników wpływających na proces fotodegradacji. Na podstawie uzyskanych wyników stwierdzono, iż obecność napełniacza podobnie jak i kompatybilizatora poprawia odporność kompozytów polilaktydowych na działanie promieniowania UV.
Films consisting of polylactide as polymer matrix, montmorillonite as filler and poly(ε-caprolactone) as compatibilizing agent were irradiated with UV (254 nm) at intervals of 2-16 hours. Effect the presence of filler and compatibilizing agent has got on photodegradation process was analyzed by examination of thermal properties of both the starting material and the material after various times of exposure to UV radiation. The following parameters were taken into account: thermal stability, temperature of glass transition as well as degree of crystallinity. Determined values indicate that the introduction of a compatibilizing agent and a nanofiller into polymer matrix increases degree of crystallinity of obtained materials. Degree of crystallinity is an important factor influencing photodegradation process. Based on obtained results it has been established that the presence of a nanofiller as well as a compatibilizing agent improves thermal stability of polylactide composites exposed to UV radiation.
Źródło:
Przetwórstwo Tworzyw; 2016, T. 22, Nr 2 (170), 2 (170); 84-90
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of supercritical foaming conditions on properties of polymer scaffolds for tissue engineering
Autorzy:
Kosowska, K.
Henczka, M.
Powiązania:
https://bibliotekanauki.pl/articles/185451.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
supercritical fluids
supercritical foaming
poly(ε-caprolactone)
tissue engineering
scaffold
płyny nadkrytyczne
pienienie nadkrytyczne
inżynieria tkankowa
szafot
Opis:
The results of experimental investigations into foaming process of poly(ε-caprolactone) using supercritical CO2 are presented. The objective of the study was to explore the aspects of fabrication of biodegradable and biocompatible scaffolds that can be applied as a temporary three-dimensional extracellular matrix analog for cells to grow into a new tissue. The influence of foaming process parameters, which have been proven previously to affect significantly scaffold bioactivity, such as pressure (8-18 MPa), temperature (323-373 K) and time of saturation (1-6 h) on microstructure and mechanical properties of produced polymer porous structures is presented. The morphology and mechanical properties of considered materials were analyzed using a scanning electron microscope (SEM), x-ray microtomography (μ-CT) and a static compression test. A precise control over porosity and morphology of obtained polymer porous structures by adjusting the foaming process parameters has been proved. The obtained poly(ε-caprolactone) solid foams prepared using scCO2 have demonstrated sufficient mechanical strength to be applied as scaffolds in tissue engineering.
Źródło:
Chemical and Process Engineering; 2017, 38, 4; 535-541
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 21

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