Polyacrylamide grafted cellulose nanocrystals (CNC-g-PAM) were incorporated into poly(vinyl alcohol) (PVA) by a solution casting method to fabricate nanocomposite films with enhanced thermal and tensile properties. The microstructure and the thermal and tensile properties of the PVA/CNC-g-PAM nanocomposite films were investigated as a function of CNC-g-PAM content. Infrared spectroscopy corroborated the presence of hydrogen bonds between PVA and the PAM on the surface of the CNC. Polarized optical microscopy and scanning electron microscopy revealed good dispersion of the CNC-g-PAM in the PVA matrix and good interfacial compatibility. Accordingly, the initial degradation temperature of the nanocomposite films was elevated slightly compared to pristine PVA film. The glass transition temperature, melting temperature, and crystallinity of the PVA also varied slightly after the incorporation of the CNC-g-PAM. At both 0% and 50% RH, the nanocomposite films showed an obvious increase of elastic modulus, no apparent change of breaking strength and a drastic reduction of elongation at break with increasing CNC-g-PAM content.

通过溶液流延法将聚丙烯酰胺接枝的纤维素纳米晶体（CNC-g-PAM）掺入聚乙烯醇（PVA）中，以制造具有增强的热和拉伸性能的纳米复合薄膜。研究了PVA / CNC-g-PAM纳米复合膜的微观结构以及热和拉伸性能，它是CNC-g-PAM含量的函数。红外光谱证实了CNC表面PVA和PAM之间存在氢键。偏光光学显微镜和扫描电子显微镜显示，CNC-g-PAM在PVA基质中具有良好的分散性，并且具有良好的界面相容性。因此，与原始PVA膜相比，纳米复合膜的初始降解温度略有升高。玻璃化温度，熔化温度，加入CNC-g-PAM后，PVA的结晶度也略有变化。在相对湿度为0％和50％时，随着CNC-g-PAM含量的增加，纳米复合膜显示出明显的弹性模量增加，断裂强度无明显变化，断裂伸长率急剧降低。