中文摘要：

利用研磨法制备出甲壳素纳米纤维（CNF）,通过浸渍法制备相应的CNF/聚乙烯醇（PVA）复合材料.使用紫外-可见光分光光度计、力学试验机、热机械分析仪等手段研究了材料的透光性能、力学性能及热稳定性能.结果表明,CNF/PVA复合材料的力学性能和热稳定性能得到显著提高,透光性能稍有降低.随着研磨次数的增加,复合材料的透光率和力学强度逐渐提高,热膨胀系数（CTE）逐渐降低,与纯PVA膜相比,研磨15次后的CNF/PVA复合膜的透光率达到80.9％,比纯PVA减少11.1％;拉伸强度和弹性模量分别为76.2 MPa和3.9 GPa,分别提高了约22.9％和6.3％;CTE为26.93 x10-6 K-1,降低了78％.

英文摘要：

The chitin nanofibers （CNF） was first obtained by grinding method, and the corresponding CNF/PVA composites were prepared by immersion method. The light transmittance, mechanical properties and thermal stability of the CNF/PVA composites were investigated. The results showed that the mechanical performance and thermal stability of CNF/PVA composites were significantly improved, and the light transmittance was slightly reduced. With the increase times of grinding, the light transmittance and mechanical strength of the composites increased and the thermal expansion coefficient （CTE） reduced gradually. Compared with pure PVA film, the light transmittance of CNF/PVA composites after 15 grinding times reached 80. 9% , reducing by 11.1% than pure PVA film. The tensile strength and elastic modulus of CNF/PVA composites after 15 grinding times were 76. 2 MPa and 3.9 GPa, increased by 22. 9% and 6. 3% , respectively. And the CTE was 26. 93 × 10 -6 K -1, reduced by 78%.