Plasma-chemical modification of polymer materials for cardiovascular surgery in order to change their wettability
| Autor: | Yuliya Khodyrevskaya, Sergey Tverdokhlebov, Yuliya Kudryavtseva |
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| Jazyk: | ruština |
| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Известия Томского политехнического университета: Инжиниринг георесурсов, Vol 325, Iss 2 (2019) |
| Druh dokumentu: | article |
| ISSN: | 2500-1019 2413-1830 |
| Popis: | Polymeric materials are characterized by low values of the surface energy; they are poorly wetted by solvents, and have low adhesion to different materials and other disadvantages. The relevance of the work stems from the need to develop specific surface properties of the polymer prostheses used in cardiovascular surgery, to increase the biocompatibility and hemocompatibility. One of the most promising and modern methods of surface modification of polymers is the impact of low-temperature plasma. Modern plasma-chemical methods have some advantages in comparison with chemical modification, where aggressive reagents and their compounds are used. The main aim of the research is to change surface properties of polymer materials for cardiovascular surgery by the plasma chemical modification methods. The research methods: The authors have applied the modern technology of polymer compositions manufacture. This is electrospinning method, which allows obtaining porous structures, adding cells and active substances. The authors selected environmentally and chemically safe impact method to the surface of the obtained products. This is plasma chemical modification, which doesn't influence the physical properties of the final product. Modification was carried out on the electrode system with preionizers, which was developed by the laboratory № 1 of the Institute of Physics High Technologies at Tomsk Polytechnic University (head of the development is Remnev G.E.). The results: The authors proposed the method of handling the surface properties of polymer products, which are responsible for wettability and surface free energy. It was shown that plasma-chemical methods of gas discharge influence on polymeric material surface allow regulating their contact properties. The main changes in wettability degree occur within a short exposure time of pulsed plasma at atmospheric pressure on polymeric material surface (from one to sixty seconds). The values of wettability contact angle for the modified polymers depend on gaseous medium nature and handling conditions in plasma. Changing pulse power and repetition rate and the processing time it is possible to control surface free energy, which allows adjusting wettability, making the surface more hydrophobic or hydrophilic. |
| Databáze: | Directory of Open Access Journals |
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