Jute fibers are finding much interest as the reinforcement of polymer composites. However, surface flaws not only affect the properties of jute fibers, but also lead to the interfacial defects of jute fiber reinforced composites. This study aims to improve the properties of jute fibers, the surface flaws of which were filled up by nano-SiO₂ particles via in situ synthesis. The waxy substance covering on jute fibers was removed by alkali pre-treatment, ethanediamine/alkali pre-treatment and acid/alkali pre-treatment, respectively. The acid/alkali pre-treatment was the most effective method among three pre-treatments. The nano-SiO₂ particles deposition was prepared by the sol-gel technique. The results showed that the surface flaws of jute fibers could be filled up by nano-SiO₂ particles with the tetraethylorthosilicate (TEOS) concentration of 0.015 mol/L. Compared with acid/alkali pre-treated fibers, the surface free energy and tensile strength of nano-SiO₂ deposited fibers were increased by 11.7% and 17.9%, respectively. Moreover, the presence of nano-SiO₂ particles contributed to the significant enhancement on the thermal stability of jute fibers.

黄麻纤维作为聚合物复合材料的增强材料，引起了人们的极大兴趣。然而，表面缺陷不仅影响黄麻纤维的性能，而且导致黄麻纤维增强复合材料的界面缺陷。这项研究旨在改善黄麻纤维的性能，黄麻纤维的表面缺陷通过原位合成被纳米SiO ₂颗粒填充。分别通过碱预处理，乙二胺/碱预处理和酸/碱预处理除去覆盖在黄麻纤维上的蜡质物质。酸/碱预处理是三种预处理中最有效的方法。通过溶胶-凝胶技术制备了纳米SiO ₂颗粒沉积物。结果表明，纳米SiO可以弥补黄麻纤维的表面缺陷。_2个颗粒，原硅酸四乙酯（TEOS）浓度为0.015 mol / L。与酸/碱预处理纤维相比，纳米SiO ₂沉积纤维的表面自由能和拉伸强度分别提高了11.7％和17.9％。而且，纳米SiO ₂颗粒的存在有助于黄麻纤维的热稳定性的显着提高。