摘要
采用共轴圆筒旋转流变仪和锥-板型转子流变仪研究了聚乙烯醇(PVA)和胶原(COL)共混溶液的稳态和动态流变性能,讨论了温度、共混比、浓度对流动曲线的影响。结果表明:PVA/COL共混溶液为假塑性流体,其偏离牛顿流动行为的程度与共混物的组成和浓度有关。胶原对于体系流变性质的影响居于主要地位,共混溶液具有和胶原相似的流变行为,如弹性效应占主导(G′>G″)、相似的剪切变稀曲线、相近的动态变性温度等。当PVA含量增至80%时,PVA/COL共混溶液的动态变性温度比纯胶原的提高了约2℃,且流动性好。浓度对于PVA/COL共混体系粘弹性的贡献以弹性增加为主;浓度越高,流体弹性特征越显著且结构越稳定。
The static and dynamic rheological behaviors for blends of collagen(COL) with poly(vinyl alcohol)(PVA) were investigated by a coaxial viscometer and an dynamic rhemeter with cone/plate system.The influences of temperature,blend ratio and solid content on the flow curves were discussed.It was found that the PVA/COL blends belonge to the pseudo-plastic liquids and the degree of deviation to Newtonian fluid has relation with the composition and solid content of the blends.Collagen was the dominant content in t...
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2008年第4期83-88,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(20576083)
关键词
胶原
聚乙烯醇
共混
流变性能
Collagen
poly（vinyl alcohol）
blends
rheological behavior
