摘要
将聚乙烯醇(PVA)和纳米羟基磷灰石(HA)按一定比例共混,采用反复冷冻-融化法制备出PVA/HA复合水凝胶.观察了PVA/HA复合水凝胶的微观结构和晶态结构,并在小牛血清稀释液润滑条件下进行了PVA/HA复合水凝胶与牛膝关节软骨的摩擦磨损试验.结果表明:随着冷冻-融化循环数的增加,PVA/HA复合水凝胶结构中氢键的作用增强,缠结结构链上的交联点增多,复合水凝胶的结晶度也随之提高,微孔结构趋于完整,因而使其压缩刚度增大;PVA/HA复合水凝胶与牛膝关节软骨的摩擦系数、接触变形和磨损量都随着冷冻-融化循环数的增加而显著减小,使复合水凝胶的减摩性和耐磨性提高.
The poly （vinyl alcohol） and hydroxylapatite were blended in a certain proportion. The Poly （vinyl alcohol）/Hydroxylapatite （PVA/HA） composite hydrogel was prepared by reiterative freezing- thawing method. The microstructures of PVA/HA composite hydrogels were observed, and the crystal structures were characterized. The sliding wear tests between the PVA/HA composite hydrogel and bovine knee articular cartilage were performed in the diluted bovine serum solution. The results showed that the effects of the hydrogen bonds, the cross-linking points in the tangled construction and the crystallization of the PVA/HA composite hydrogel increase with the increasing of freezing-thawing cycles. Its network structures tend to perfect conditions, so the compression rigidity improves. The coefficient of friction, the contact deformation and the wear depth between the PVA/HA composite hydrogel and bovine knee articular cartilage are inversely proportional to the freezing-thawing cycles, so the friction-reducing and anti-wear properties improve.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2008年第3期257-261,共5页
Chinese Journal of Materials Research
基金
国家自然科学基金(50535050
50405042)
江苏省自然科学基金(BK2005403
BK2005019)
教育部新世纪优秀人才支持计划(NCET-06-0479)资助项目~~
关键词
复合材料
聚乙烯醇
羟基磷灰石
复合水凝胶
微观结构
摩擦性能
composites, poly（ vinyl alcohol）, hydroxyapatite, composite hydrogel, microstructure,friction property
