椰壳纤维增强环氧树脂复合格栅的制备及性能研究

Preparation and performance of coir⁃fiber⁃reinforced epoxy composite geogrids

以椰壳纤维为增强材料,制备了椰壳纤维增强环氧树脂复合格栅,通过多肋格栅拉伸试验,研究了椰壳纤维含量、长度和肋条间距对复合格栅的影响。结果表明,随着椰壳纤维含量的增加,拉伸屈服力先增大后减小,在椰壳纤维含量为1%时达到最大值,且当椰壳纤维含量超过1%时,复合格栅的拉伸特性将低于纯环氧树脂时的拉伸特性;随着椰壳纤维长度的增加,复合格栅的拉伸屈服力也出现了先增大后减小的规律,当纤维长度为1 cm时,达到最大值,此时的拉伸屈服力相比于纯环氧树脂格栅时的提高了34.33%;相比于纤维长度和含量对复合格栅的影响,肋间距对复合格栅的影响更明显,当肋间距为1 cm时,拉伸屈服力达到最大值。

In this paper,coir⁃fiber⁃reinforced epoxy composite geogrids were prepared by using coir fibers as a reinforce⁃ment material,and the effects of the content,length,and rib spacing of coir fibers on their performance were investigated through the tensile tests of multi rib grids.The results indicated that the tensile yield force of the composite geogrids pre⁃sented an increase at first and then tended to decrease with an increase in the coir fiber content.The composite geogrids obtained maximum values in tensile properties at a coir fiber content of 1 wt%;however,their tensile performance was poorer than that of pure epoxy grid when the coir⁃fiber content exceeded 1 wt%.The tensile yield force of the composite geogrids also exhibited an increase at first and then decreased with increasing the coir fiber length,the tensile yield force of composite grid also increased first and then decreased.Their tensile yield force reached a maximum value at a fiber length of 1 cm,which was 34.33%higher than that of pure epoxy grid.Compared to the fiber length and content,the rib spacing presented a more significant influence on the composite geogrids,whose tensile yield force reached a maxi⁃mum at a rib spacing of 1 cm.