The rheological behavior of collagen dispersion/poly(vinyl alcohol) blends

The rheological behavior of collagen dispersion/poly(vinyl alcohol) blends
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胶原分散体/聚乙烯醇共混物的流变行为

DOI:
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发表时间:
2007
影响因子:
1.3
通讯作者:
Li, Guoying
Li, Guoying
中科院分区:
工程技术4区
文献类型:
--
作者:
Lai, Guoli;Du, Zongliang;Li, Guoying

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采用振荡流变仪、傅立叶变换红外光谱仪和扫描电镜研究了胶原分散体(COL)与聚乙烯醇(PVA)不同质量比的共混物。结果表明,即使PVA含量为80%,COL/PVA共混物在动态热处理和频率处理过程中仍表现出明显的胶原分散体特征,如主要的弹性外观(G '> G”)、类似的剪切变稀行为和低于G'的热变性。但PVA对共混物的影响是显著的,如动态变性温度升高,酰胺Ⅰ、Ⅱ和Ⅲ谱带强度降低,共混物表面不规则孔减少等。胶原蛋白与PVA之间存在相互作用,尤其是在PVA含量低或高的区域。
Blends of collagen dispersion (COL) with poly(vinyl alcohol) (PVA) in different weight ratios were investigated by oscillatory rheometry, Fourier transform-infrared spectroscopy and scanning electron microscopy. It was found that even with 80% of PVA, the COL/PVA blends behaved more like collagen dispersion than pure PVA solution in the dynamic thermal and frequency processing, for instance, a dominant elastic appearance (G'>G"), a similar shear thinning behavior and the thermal denaturation below . However, influence on the blend behaviour by PVA was noticeable, for instance, an increase of dynamic denaturation temperature, the decreasing intensity of amide I, II and III bands as well as the diminishing irregular pores on the surface of blends. The interaction between collagen and PVA could be observed, especially at the regions with low content or high content of PVA.
DOI: 10.1002/masy.200350712
发表时间: 2003-07
影响因子: --
作者:
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