Sisal fiber-reinforced thermoplastic starch (TPS) composites with excellent properties have been widely used in agriculture, packaging, and other fields. In this work, a new type of sisal/starch composite was prepared by torque rheologic melting and a hot pressing process successively, improving the compatibility between sisal fibers and TPS. The additives of glutaraldehyde and starch nanocrystals played an important role in improving the properties of the composites. They not only improved their surface smoothness, uniformity, compatibility, and interfacial adhesion strength but also promoted the mechanical properties that was because the interaction between the matrix and fibers was formed to effectively promote stress dispersion and share the load to enhance the deformation ability. These additives also promoted the cross-linking function of the composites and reduced the number of hydroxyl groups on their surface, decreasing the moisture absorption rate. After cross-linking with these compatibilizers, the hydrophobicity of the composites improved, decreasing their water vapor permeability.

中文翻译：

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淀粉纳米晶对戊二醛增容剑麻纤维/淀粉复合材料的影响

剑麻纤维增强热塑性淀粉（TPS）复合材料具有优异的性能，已广泛应用于农业、包装等领域。本工作依次采用转矩流变熔融法和热压法制备了一种新型剑麻/淀粉复合材料，提高了剑麻纤维与TPS的相容性。戊二醛和淀粉纳米晶的添加剂在改善复合材料的性能方面发挥了重要作用。它们不仅提高了它们的表面光滑度、均匀性、相容性和界面粘合强度，而且还促进了机械性能，因为基体和纤维之间形成了相互作用，有效地促进了应力分散，分担了载荷，增强了变形能力。这些添加剂还促进了复合材料的交联功能，减少了其表面羟基的数量，降低了吸湿率。与这些增容剂交联后，复合材料的疏水性提高，降低了它们的水蒸气渗透性。