Molecular dynamics simulation on mechanical properties of PVP/PVA
- VernacularTitle:PVP/PVA水凝胶力学性能的分子动力学模拟
- Author:
Yan-en WANG
1
;
Qing-hua WEI
2
;
Ming-ming YANG
2
;
Sheng-min WEI
2
Author Information
1. Mechatronics School, Northwestern Polytechnical University
2. Mechatronics School, the Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, Ministry of Education, Northwestern Polytechnical University
- Publication Type:Journal Article
- Keywords:
Polyvinylpyrrolidone (PVP);
Polyvinyl alcohol (PVA);
Molecular dynamics (MD);
Mechanical properties;
Radial distribution function
- From:
Journal of Medical Biomechanics
2014;29(2):E099-E104
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the mechanical properties of PVP/PVA composite hydrogel and its interaction principle based on the molecular dynamics (MD) theory. Methods MD simulation was applied to investigate mechanical properties and radial distribution functions of PVP, PVA and their mixed system PVP/PVA. Results Compared with the pure PVP, mechanical properties of PVP/PVA were significantly improved, and not affected by temperature. The interaction between PVA and PVP was expected to occur through the interchain hydrogen bonding between the oxygen atom of PVP and the hydroxyl group of PVA. Conclusions MD method revealed the interaction mechanism of PVP/PVA hydrogel at molecular microscopic level and proved it better than pure PVP. Meanwhile, its mechanical properties were stable at different environment temperatures. These results provide a reliable theoretical research method for studying the fabrication process of hydrogel prosthesis in clinic and its mechanical properties.
