To improve the interfacial compatibility of jute fiber reinforced polypropylene (PP) composites, hydrothermal method was used to deposit SiO₂ nanoparticles on the surface of pretreated jute fibers and the effect of reaction factors (tetraethoxysilane [TEOS] concentration, ammonia concentration, and reaction temperature) on the deposition of SiO₂ nanoparticles were evaluated. The results of FTIR, XRD, SEM, and TEM showed that the amorphous SiO₂ nanoparticles with an average particle size of 65.0 nm were successfully deposited on the surface of jute fibers at the TEOS/H₂O volume ratio of 1:2, ammonia of 0.55 M, reaction temperature of 100 °C (0.15 MPa) for 5 h. Compared with the sol–gel method, SiO₂ nanoparticles obtained by the hydrothermal method possessed smaller particle size and were less agglomerated, which can better fill in the surface defects of the jute fibers and result in a 12.9% increase in the tensile strength. The study on the mechanical properties and interface performance of the jute fiber reinforced PP composites indicated that the interfacial compatibility between jute fibers and PP was obviously improved. The tensile and impact strength of the composites reinforced with nano‐SiO₂ deposited jute fibers were increased by 26.87% and 25.65%, respectively, compared with the untreated jute fibers. J. VINYL ADDIT. TECHNOL., 26:43–54, 2020. © 2019 Society of Plastics Engineers

中文翻译：

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水热法在黄麻纤维表面沉积SiO2纳米粒子及其增强聚丙烯复合材料的研究

为了提高黄麻纤维增强聚丙烯（PP）复合材料的界面相容性，采用水热法将SiO ₂纳米颗粒沉积在预处理过的黄麻纤维表面上以及反应因素（四乙氧基硅烷[TEOS]浓度，氨气浓度和反应温度）的影响）评估了SiO ₂纳米颗粒的沉积。FTIR，XRD，SEM和TEM结果表明，在TEOS / H ₂ O体积比为1：2的情况下，平均粒径为65.0 nm的无定形SiO ₂纳米颗粒成功沉积在黄麻纤维表面。0.55M，反应温度为100℃（0.15MPa）5小时。与溶胶-凝胶法相比，SiO ₂通过水热法获得的纳米颗粒具有较小的粒径和较少的团聚，这可以更好地填充黄麻纤维的表面缺陷，并导致拉伸强度提高12.9％。对黄麻纤维增强PP复合材料的力学性能和界面性能的研究表明，黄麻纤维与PP的界面相容性得到了明显改善。与未处理的黄麻纤维相比，纳米SiO ₂沉积的黄麻纤维增强的复合材料的拉伸强度和冲击强度分别提高了26.87％和25.65％。J.乙烯基添加物。TECHNOL。，26：43–54，2020.©2019塑料工程师协会