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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。
Cotton stalks and recycled polyethylene were used as raw materials and titanate as coupling agent. Cotton stalks and wood-plastic composites were prepared by hot pressing method. The cotton stalks content, hot pressing temperature and holding time On the properties of wood-plastic composites, and physical and mechanical properties through a separate test of cotton stalk content on the performance of wood-plastic composites. The results of orthogonal test showed that the content of cotton stalk had the greatest influence on the flexural strength, elastic modulus and water absorption of the composites. The hot pressing temperature and holding time greatly affected the flexural strength and elastic modulus of the composites, The effect of wood-plastic composites was not obvious. When cotton stalk flour content was 40%, hot-pressing temperature was 160 ℃, and holding time was 10 min, the wood-plastic composites had the best comprehensive properties. The results of physical and mechanical tests show that the flexural strength and elastic modulus of composites firstly increase and then decrease with the increase of cotton stalk flour content, and reach the maximum when the stalk flour content is 40%. The water absorption With the increase of cotton stalk flour content.