PVA/胶原共混溶液的流变性能
heological Behavior of Poly(vinyl alcohol)/Collagen Blends
作者：来国莉(四川大学 皮革化学与工程教育部重点实验室，四川 成都 610065)；李洋(四川大学 皮革化学与工程教育部重点实验室，四川 成都 610065)；杜宗良(四川大学 轻纺与食品学院，四川 成都 610065)
Author：(The Key Lab. of Leather Chem. and Eng. of Ministry of Education, Sichuan Univ. , Chengdu 610065, China)；(The Key Lab. of Leather Chem. and Eng. of Ministry of Education, Sichuan Univ. , Chengdu 610065, China)；(College of Light Industry, Textiles and Foods, Sichuan Univ. , Chengdu 610065, China)
收稿日期：2007-09-05 年卷（期）页码：2008,40(4):83-88
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：胶原；聚乙烯醇；共混；流变性能
Key words：Collagen; poly(vinyl alcohol); blends; rheological behavior
基金项目：国家自然科学基金资助项目(20576083)
中文摘要
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PV
英文摘要
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 the rheological behaviors of PVA/COL blends. It seemed collagen and its blends behaved similarly, such as dominate elastic appearance (G′>G″), the similar shear thinning behavior and the nearly same thermal denaturation. The denaturation temperature for 80/20 (PVA/COL) blend with fine fluidity was about 2 ℃ higher than that for pure collagen alone. The contribution of solid content to the viscoelastic properties was mainly increasing the elasticity of PVA/COL blends . The PVA/COL blends with higher solid content showed more dominant elastic property as well as the more stable flow structure than that with lower solid content.
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