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Каталог книг и продолжающихся изданий библиотеки Института биофизики СО РАН

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Труды сотрудников ИБФ СО РАН

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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin, Anatoly Nikolayevich, Sukhanova, Anna Alekseevna, Orlova, Viktoriya Viktorovna, Volchek, Alexander Ivanovich
Заглавие : A novel method of fabricating polymer tubes using the casting solution technique
Колич.характеристики :4 с
Коллективы : scientific laboratory "Intelligent Materials and Structures"within the state assignment of the Ministry of Science and Higher Education of the Russian Federation [FEFE-2020-0015]
Место публикации : Mater. Lett.: ELSEVIER, 2021. - Vol. 282. - Ст.128833. - ISSN 0167-577X, DOI 10.1016/j.matlet.2020.128833. - ISSN 1873-4979(eISSN)
Примечания : Cited References:8. - This work was carried out by the team of the scientific laboratory "Intelligent Materials and Structures"within the state assignment of the Ministry of Science and Higher Education of the Russian Federation for the implementation of the project "Development of multifunctional smart materials and structures based on modified polymer composite materials capable to function in extreme conditions" (Project No. FEFE-2020-0015).
Аннотация: A procedure has been developed to fabricate polymer tubes using solution casting inside template tubes. Polyester solution placed inside the vertically fixed template evaporated forming a hollow tube on the inner walls of the template. Silicone tubes used as the templates were permeable to solvent vapors and had relatively low adhesion to materials of the fabricated tubes, enabling their effortless removal. Parameters of the polymer tubes were determined by a type of the polymer, its concentration in the solution, and the inner diameter of the template. In the first method, a clamp was placed on the lower end of the template tube. A thickness of the new tube walls gradually increased from the open to the clamped end of the template tube. In another method viscous polymer solution without clamping was used; in this case, a polymeric bulkhead was formed in the middle of the tube. Two microbial polyesters, poly-3-hydroxybutyrate and poly-3-hydroxybutyrate-co-3-hydroxyvalerate, and also synthetic poly-L-lactide were used as model polymers. (C) 2020 Elsevier B.V. All rights reserved.
WOS
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boyandin A. N., Sukhanova A. A., Orlova V. V., Volchek A. I.
Заглавие : A novel method of fabricating polymer tubes using the casting solution technique
Место публикации : Mater Lett: Elsevier B.V., 2021. - Vol. 282. - Ст.128833. - ISSN 0167577X (ISSN), DOI 10.1016/j.matlet.2020.128833
Аннотация: A procedure has been developed to fabricate polymer tubes using solution casting inside template tubes. Polyester solution placed inside the vertically fixed template evaporated forming a hollow tube on the inner walls of the template. Silicone tubes used as the templates were permeable to solvent vapors and had relatively low adhesion to materials of the fabricated tubes, enabling their effortless removal. Parameters of the polymer tubes were determined by a type of the polymer, its concentration in the solution, and the inner diameter of the template. In the first method, a clamp was placed on the lower end of the template tube. A thickness of the new tube walls gradually increased from the open to the clamped end of the template tube. In another method viscous polymer solution without clamping was used; in this case, a polymeric bulkhead was formed in the middle of the tube. Two microbial polyesters, poly-3-hydroxybutyrate and poly-3-hydroxybutyrate-co-3-hydroxyvalerate, and also synthetic poly-L-lactide were used as model polymers. © 2020 Elsevier B.V.
Scopus
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shishatskaya E.I., Nikolaeva E.D., Goreva A.V., Brigham C.J., Volova T.G., Sinskey A.J.
Заглавие : An in vivo study of pha matrices of different chemical composition: Tissue reaction and biodegradation
Место публикации : Cellular Transplantation and Tissue Engineering. - 2012. - Vol. 7, Is. 1. - С. 73-80. - ISSN 1815445X (ISSN)
Ключевые слова (''Своб.индексиров.''): degradable polymer matrices--degradation--phas--polyhydroxyalkanoates--subcutaneous implantation--tissue reaction
Аннотация: The study addresses consequences of subcutaneous implantation of film matrices prepared from different PHAs to laboratory animals. No negative effects of subcutaneous implantation of PHA matrices on physiological and biochemical characteristics of the animals were determined. Independently of the matrices composition and duration of the contact with the internal environment of the organism we did not observe any deviations in the behavior of animals, their growth and development, as well as blood functions. Response of the tissues to PHA matrices was comparable with the response to polylactide, but substantially less expressed at the earlier time periods after implantation. Tissues response to implantation of PHA of all types is characterized by short-term (up to 2 weeks) post-traumatic inflammation with formation of fibrous capsules by 30th-60th days with the thickness less than 100 microns, which get thinner down to 40-60 microns by 180th day as the result of involution. No differences in response of tissues and the whole organism were observed for the matrices produced from the homopolymer of 3-hydroxybutyric acid (P3HB), copolymers of 3-hydroxybutyric and 4-hydroxybutyric acids (P3HB/4HB), 3-hydroxybutyric acid and 3-hydroxyvalerianic acids (P3HB/3HV), 3-hydroxybutyric and 3-hydroxyhexanoate acids (P3HB/3HH). Macrophages and foreign-body giant cells actively participate in the response of the tissues to PHAs. In the studied conditions matrices from the copolymers containing 3-hydroxyhexanoate and 4 hydroxybutyrate were determined as more actively degraded PHA. The next less degraded matrices were matrices from the copolymer of P3HB/3HV and the most resistant were P3HB matrices. The slower degradation of PHA matrices was accompanied by delayed development of giantcells response. The studied PHA matrices can be placed in the following range by their degradation: P3HB/3HH - P3HB/4HB - P3HB/HV - P3HB.
Scopus
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