仿竹结构单丝玻璃纤维增强多孔聚醚砜基复合材料

Bamboo like porous polyethersulfone matrix monofilament glass fiber composite

竹子是一种以竹纤维为增强体、多孔木质素为基体而组成的天然复合材料。本文借鉴竹子的结构特征,采用高性能热塑性聚合物浸没沉淀相转化法在玻璃纤维(GF)表面沉积梯度孔径分布的多孔聚醚砜(PES)基体,制备仿竹结构单丝玻璃纤维增强多孔聚醚砜基复合材料(GF/PES),并对其微观形貌、拉伸力学性能和"温度-模量"智能响应性进行了研究。结果表明,基于梯度多孔PES基体良好的吸能作用及其对玻璃纤维表面微小缺陷的修复作用,GF/PES的拉伸强度和断裂伸长率最高可分别比GF提高39.11%和58.1%。此外,多孔聚合物基体还可作为各类功能材料的载体,例如在其多孔结构中填充水,当水随着温度变化发生相变时,可赋予GF/PES显著的模量变化,从而制备出"温度-模量"智能响应复合材料。

Bamboo is a kind of natural composite material,which is composed of bamboo fiber as reinforcement and porous lignin as matrix.In this paper,based on the microstructure of bamboo,the porous polyethersulfone(PES)matrix with gradient pore size distribution was deposited on the surface of glass fiber(GF)by immersion precipitation phase transformation method of high-performance thermoplastic polymer.The bamboo like porous polyethersulfone matrix monofilament glass fiber composite(GF/PES)was prepared,and its microstructure,tensile mechanical properties and"temperature modulus"response were studied.Based on the good energy absorption of the gradient porous PES matrix and its repair effect on the micro defects on the surface of GF,the tensile strength and elongation at break of GF/PES can be increased by 39.11%and 58.1%,respectively.In addition,the porous polymer matrix also can be used as carrier of various functional materials.For example,filling water in pores of porous PES can make a significant modulus change of GF/PES.Therefore,"temperature-modulus"intelligent response composite are obtained.