天然纤维的改性及在复合材料中的增强效应

Treatment for the Inherent Properties of Natural Fibers and Its Effects on the Natural Fiber Composites

采用正硅酸乙酯溶液和硅酸钙溶液对剑麻纤维进行改性,然后将其与聚丙烯树脂制成复合材料。研究了纤维处理后增重情况以及处理前后单纤维及复合材料的拉伸性能,利用红外光谱对处理前后的单纤维进行了表征与分析。结果表明,正硅酸乙酯溶液和硅酸钙溶液处理后单纤维及复合材料的拉伸性能得以提高,单纤维拉伸强度分别提高14.68%和13.15%,单纤维拉伸模量分别提高16.28%和11.22%。经正硅酸乙酯溶液和KH550硅烷溶液组合处理后,复合材料拉伸性能提高更加明显,拉伸强度和模量分别提高24.05%和58.33%。

The sisal fibers were treated with tetraethoxysilane （TEOS）and C-aSiO3 solutions. The composites were manufactured by treated fibers and polypropylene. The mass gain of treated fibers and the tensile properties of individual fibers and composites were studied. The changes of fibers with different treatment were analyzed by Fourier transform infrared spectrum （FT-IR）. The results show that the tensile properties of individual fibers and composites are increased with treatment by TEOS and CaSiO3 solutions. And the tensile strength of individual fibers is increased by 14.68 % and 13.15 %, respectively. The tensile module of individual fibers is increased by 16.28 % and 11.22%, respectively. With the treatment of combination by TEOS and KH550 silane solutions, the tensile properties of composites are increased significantly. And the tensile strength and modulus of composites is increased by 24.05 % and 58.33 %, respectively.