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纤维和树脂之间的界面结合强度是决定复合材料性能的关键因素。通过实验研究在玻璃纤维表面涂覆经硅烷偶联剂KH550表面处理的纳米SiO_2以及在PP基体中加入PP-g-MAH对玻璃纤维增强聚丙烯复合材料的界面结合强度和力学性能的影响。结果表明,纳米SiO_2经KH550表面处理后可以降低其表面能,有利于其在纤维表面分散吸附;纤维表面涂覆纳米SiO_2及在PP中加入PP-g-MAH,有利于增强纤维和树脂之间的界面结合强度,复合材料的层间剪切强度提升了116.06%,拉伸强度提升了109.14%,弯曲强度提升了99.85%。
The interfacial bonding strength between the fibers and the resin is the key factor that determines the properties of the composite. Through the experimental study, the glass fiber surface coated with silane coupling agent KH550 surface treatment of nano-SiO2 and the PP matrix PP-g-MAH on the glass fiber reinforced polypropylene composite interface bonding strength and mechanical properties. The results show that the surface energy of nano-SiO_2 treated by KH550 can reduce its surface energy, which is beneficial to disperse adsorption on the fiber surface. The nano-SiO_2 coating on the surface of nano-SiO_2 and the addition of PP-g-MAH in PP are beneficial to enhance the surface energy The interlaminar shear strength of the composite increased by 116.06%, the tensile strength by 109.14% and the flexural strength by 99.85%.