单向竹原纤维表面改性对其增强不饱和聚酯树脂复合材料性能的影响

发布时间：2018-05-16 03:04

  本文选题：竹原纤维 + 表面改性　； 参考：《复合材料学报》2017年02期

【摘要】：采用碱处理、碱-偶联剂联合处理对竹原纤维进行表面改性,通过缝合-模压工艺制备了单向连续竹原纤维/不饱和聚酯树脂(BF/UP)复合材料。研究了不同表面改性方法对BF/UP复合材料静态、动态力学性能、吸水性能等的影响,并用SEM、红外光谱等技术研究了改性处理后纤维的表面及复合材料界面结合情况。结果表明:经过不同表面处理后BF/UP复合材料的性能均有所改善。当采用5wt%碱-3wt%偶联剂联合处理时,BF/UP复合材料综合性能最优,其拉伸强度、弯曲强度、弯曲模量、剪切强度较未处理的分别提高了34.29%、15.95%、11.26%、29.39%;复合材料存储模量(33℃)较未处理的提高了63.80%,损耗因子有所降低;BF/UP复合材料24h、720h吸水率较未处理的分别减小了55.35%、27.32%。SEM和红外光谱结果表明,改性处理后竹原纤维表面杂质减少,附着了一层偶联剂膜,BF/UP复合材料中纤维与树脂之间的界面结合更好。
[Abstract]:The surface of bamboo fiber was modified by alkali treatment and alkali-coupling agent. Unidirectional continuous bamboo fiber / unsaturated polyester resin / BF / UPU composite was prepared by suture molding process. The effects of different surface modification methods on the static, dynamic and water-absorbing properties of BF/UP composites were studied. The results showed that the properties of BF/UP composites were improved after different surface treatments. When treated with 5wt% alkali-3wt% coupling agent, the BF / up composite has the best comprehensive properties, its tensile strength, flexural modulus, Compared with the untreated composites, the shear strength increased 34.29% and the storage modulus of the composites increased 63.80, and the loss factor decreased by 55.3527.32. SEM and infrared spectroscopy, respectively, when compared with the untreated composites at 24 h or 720 h. The results of SEM and IR spectra showed that the shear strength of the composites was higher than that of the untreated composites. The shear strength was increased by 34.29% and the storage modulus of the composites was increased by 33 鈩，

本文编号：1895150