Study of Biodegradation of Film Materials with D-Cycloserine Based on Polyurethaneurea and the Dynamics of Drug Release
Tetiana Rudenchyk,
Rita Rozhnova,
Nataliia Galatenko,
Lіudmyla Nechaeva
Issue:
Volume 5, Issue 4, December 2019
Pages:
97-104
Received:
1 October 2019
Accepted:
26 October 2019
Published:
8 November 2019
Abstract: The study of the ability to biodegradation of film materials with D-cycloserine obtained on the basis of polyurethaneurea with fragments of the copolymer of N-vinylpyrrolidone with vinyl acetate and vinyl alcohol, and 1.6-hexamethylenediamine in the structure under the influence of biological medium 199 for 1, 3 and 6 months were conducted. IR spectroscopy and physical-mechanical tests of these film materials before and after incubation in biological medium 199 were investigated. According to research results, there are decrease of the tensile strength (in 1.29-2.50 times) and a relative elongation at break (in 1.15-1.91 times) after incubation in biological medium 199. It is established that under the influence of biological medium 199 there are processes of biodegradation of film materials. The introduction of D-cycloserine into the composition of polyurethaneurea contributes to their biodegradation. It allows us to conclude that biodegradation is due to release of D-cycloserine. The study of the dynamics of D-cycloserine release from the polymer matrix was conducted by spectrophotometric method. The amount of drug varies depending on the copolymer content in structure of film materials (75.00-96.71% of the total amount of the introduced drug). It has been established that the studied film materials are capable to the prolonged release of D-cycloserine. It allows using them as film coatings for medicine with different ability to release of drug depending on requirements.
Abstract: The study of the ability to biodegradation of film materials with D-cycloserine obtained on the basis of polyurethaneurea with fragments of the copolymer of N-vinylpyrrolidone with vinyl acetate and vinyl alcohol, and 1.6-hexamethylenediamine in the structure under the influence of biological medium 199 for 1, 3 and 6 months were conducted. IR spec...
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Preparation of Fluorosilicone Triblock Copolymers and Microphase Separation Behavior on Surfaces
Xitao Cheng,
Xuan Tang,
Wenhong Li,
Fangfang Huang,
Qianjin Wang
Issue:
Volume 5, Issue 4, December 2019
Pages:
105-113
Received:
25 October 2019
Accepted:
18 November 2019
Published:
26 November 2019
Abstract: Fluorosilicone polymer is a new type of structure of the fluorine silicon block polymer. Because it combines the excellent properties of organic silicone and organic fluorine compounds, it has a wide range of uses and becomes a hot issue in the field of materials. In the paper, A series of novel poly(2,2,3,4,4,4-hexafluorobutyl methacrylate)-block-poly(dimethylsiloxane)-block-poly(2,2,3,4,4,4-hexafluorobutyl methacrylate)s (PHFBMA-b-PDMS-b-PHFBMA) were synthesized by atom transfer radical polymerization (ATRP) with different molecular weight prepared polydimethylsiloxane macroinitiator as raw materials. The effects of the fluorine and silicone content on the hydrophobic and oleophobic properties of prepared triblock copolymers were also investigated. The structure and composition of the copolymers were analyzed and identified by infrared spectroscopy (IR) and nuclear magnetic resonance (NMR). The average molecular weight and molecular weight distribution of the prepared PHFBMA-b-PDMS-b-PHFBMA were evaluated by gel permeation chromatography (GPC). The surface energy of the triblock copolymers was calculated from the contact angle reaches as low as 10.43 mN/m through the Owens-Wendt-Rabel-Kaelble method, with the fluorine content of triblock polymer was 19.0 wt%. Atomic force microscopy (AFM), differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS) indicated that there were Obvious nanoscopically microphase separation on the surface of the prepared triblock copolymers and the fluoride contents in the block polymer of the fluorine silicon block were more likely to migrate to the surface.
Abstract: Fluorosilicone polymer is a new type of structure of the fluorine silicon block polymer. Because it combines the excellent properties of organic silicone and organic fluorine compounds, it has a wide range of uses and becomes a hot issue in the field of materials. In the paper, A series of novel poly(2,2,3,4,4,4-hexafluorobutyl methacrylate)-block-...
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