关键词: 竹纤维, 聚甲醛, 复合材料, 界面调控, 力学性能

Abstract: An interfacial control for bamboo fibers (BF) with recycled polyoxymethylene (rePOM) was conducted by using NaOH, alkali and silanecoupling agent, alkali and isocyanate, respectively. Effects of modification method and BF content on mechanical properties of the re-POM/BF composites were investigated. The results indicated that this interfacial control could be well performed by the mixtures of NaOH with silanecoupling agent and with isocyanate. An increase of 13.38 % in flexure strength along with tensile strength of 50.36 MPa was achieved for composites containing 20 wt % of BF modified by the mixture of NaOH with 2 wt % isocyanate. On the other hand, the composite obtained an increase in flexure strength by 12.61 % as well as tensile strength of 46.87 MPa. It was concluded that the mixture of alkali with 2 wt % isocyanate could generate a much better modification effect on BF, and the composite containing 20 wt % BF achieved the optimum mechanical properties.

Key words: bamboo fiber, polyoxymethylene, composite, interface control, mechanical property