棉秆塑木复合材料的制备及性能研究

以棉秆粉和回收聚乙烯为原料、钛酸酯为偶联剂,采用热压法制备了棉秆塑木复合材料,利用正交试验法探讨了棉秆粉含量、热压温度和保温时间对塑木复合材料性能的影响,并通过物理力学性能测试单独考察了棉秆粉含量对塑木复合材料性能的影响。正交试验法的结果表明:棉秆粉含量对复合材料的弯曲强度、弹性模量和吸水率影响最大,热压温度和保温时间对复合材料的弯曲强度和弹性模量影响较大,对吸水率影响不大;当棉秆粉含量为40%、热压温度为160℃、保温时间为10 min时,塑木复合材料具有最优的综合性能。物理力学性能测试结果表明:复合材料的弯曲强度和弹性模量随棉秆粉含量的增加均呈现先增大后减小的趋势,在棉秆粉含量为40%时均达到最大值;吸水率随棉秆粉含量的增加而增大。

Study on Preparation and Properties of Cotton Straw Wood-plastics Composite

Taking cotton straw and recycled PE as raw material,titanate as coupling agent,the cotton straw wood-plastics composite(WPC) was prepared by thermal compression.The effects of cotton straw powder content,thermal compression temperature,holding time on the properties of WPC were investigated by orthogonal experiment.The effect of cotton straw powder content on the properties of WPC was studied individually by physical and mechanical property tests.The orthogonal experiment results show that the cotton straw powder content is the most important influencing factor for flexural strength,elastic modulus and water absorption of WPC,the thermal compression temperature and holding time have certain effect on flexural strength and elastic modulus,and have little effect on water absorption;when the cotton straw powder content is 40%,thermal compression temperature is 160℃,holding time is 10 min,the WPC exhibits the best comprehensive properties.The results of physical and mechanical property test show that with the increase of cotton straw powder content,the flexural strength and elastic modulus of WPC increase at first and then decrease,both of them are up to the maximum values when the cotton straw powder is 40%;the water absorption of WPC increases with the increase of cotton straw powder content.