With gelatin(Gel), chitosan(CS), nanocellulose(NCC) as raw materials,the nanocellulose/chitosan/gelatin(NCC/CS/Gel) composite films with different NCC and CS mass ratios were prepared by solution blending method. The light transmittance, microstructure, chemical composition, crystal structure, thermal properties and mechanical properties of the composite films were characterized by UV-Vis spectrophotometer,scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), thermal analyser(TGA) and texture analyser. The results showed that the nanocellulose,chitosan and gelatin formed network structure with strong interaction. It could be seen that the composite fimls had smooth surface,uniform dispersion and good compatibility. With the increasing of NCC content, the transmittance of NCC/CS/Gel composite films decreased. Compared with CS, the light thermal stability of the composite films was remarkably improved. When the mass ratio of NCC to CS was 7:1,the tensile strength of NCC/CS/Gel composite films was up to 33 MPa,elongation at break could reach 14.9 %,the maximum water absorption rate could reach 341 %.%以明胶(Gel)、壳聚糖(CS)、纳米纤维素(NCC)为原料,采用溶液共混法制备了不同NCC和CS质量比的纳米纤维素/壳聚糖/明胶复合膜.采用紫外-可见分光光度计、扫描电镜(SEM)、红外光谱仪(FT-IR)、X射线衍射仪(XRD)、热分析仪(TGA)和质构仪对所制备复合膜的透光性能、显微结构、化学结构、晶体结构、热学性能和力学性能进行了分析.结果表明:纳米纤维素、壳聚糖、明胶之间形成相互作用较强的网络结构.复合膜表面光滑,分散均匀,具有良好的相容性.随着纳米纤维素含量的增加,复合膜透光率呈下降的趋势.与壳聚糖膜相比,复合膜的热稳定性显著提高.当纳米纤维素与壳聚糖质量比为7:1时,复合膜拉伸强度最高可达到33 MPa,断裂伸长率可达到14.9 %,吸水率最大值可达到341 %.
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