title: [Swelling characterization of poly (vinyl alcohol) hydrogel for prosthetic intervertebral disc nucleus].
abstract: In this study the poly(vinyl alcohol)(PVA) hydrogel elastomer was prepared by freezing-thawing method. The influences of percentage of poly (vinyl alcohol) in hydrogel, pH of solution and swelling temperature upon the swelling characteristic of PVA-hydrogel prosthetic nucleus material were studied. Its micropores were observed using SEM, and the swelling dynamics was further discussed. The experimental results showed that the poly (vinyl alcohol) hydrogel was a kind of network with a lot of micropores, the pore size was related with the PVA content. The maximum swelling ratio decreases when the percentage of PVA in hydrogel, the pH of solution and the swelling temperature were enhanced. The swelling process was described by the equation of swelling dynamics equation. The swelling rate was greatly influenced by the PVA content, the pH of solution and the dimension of hydrogel sample.
authors.affiliation: School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Li
authors.forename: Jin
authors.initials: J
authors.lastname: Gao
authors.forename: Guoquan
authors.initials: G
authors.lastname: Liu
authors.forename: Zhengqiu
authors.initials: Z
authors.lastname: Gu
authors.forename: Yuanzheng
authors.initials: Y
authors.lastname: Ma
authors.forename: Haibin
authors.initials: H
authors.lastname: Xue
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry; D020100:Hydrogels; D006863:Hydrogen-Ion Concentration; D020007:Implants, Experimental; D007403:Intervertebral Disc; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D019736:Prostheses and Implants / Q000592:standards
chemical_list: D001672:Biocompatible Materials; D020100:Hydrogels; D011142:Polyvinyl Alcohol