将不同防腐剂处理后的玉米秸秆皮(CSF)、高密度聚乙烯(HDPE)塑料和其他添加剂共混,熔融复合后,采用挤出成型制备CSF/HDPE复合材料。考察了玉米秸秆皮添加量、防腐剂种类及其处理浓度对复合材料力学性能的影响,并利用扫描电镜(SEM)和红外光谱(FTIR)对复合材料进行表征。结果表明:经氨溶铜季铵盐(ACQ)处理后,随ACQ浓度增加,复合材料力学性能逐渐降低; 玉米秸秆纤维质量分数为50%、ACQ质量分数为1%时,玉米秸秆皮/HDPE复合材料的力学性能最佳。经硼酸锌(ZB)处理后,随ZB浓度的增加,复合材料拉伸强度逐渐增强; 弯曲强度、弯曲模量、冲击强度均呈现先增大后减小的趋势; 玉米秸秆纤维质量分数为50%、ZB质量分数为2%时,CSF/HDPE复合材料的力学性能最佳。
Abstract
Corn stalk fibers(CSF)pretreated by different preservatives, and high density polyethylene(HDPE)plastic were mixed and melt-compounded with other additives using a twin-screw extruder, and then molded to produce CSF/HDPE composites. The effects of preservative type and concentration, and CSF loading amount on the mechanical properties of composites were examined using the scanning electron microscope(SEM)and Fourier transform infrared(FTIR). Experiment results indicated that, as the alkaline copper quaternary(ACQ)concentration in the preservative increased, the mechanical properties of the composites decreased. The optimum mechanical property of CSF/HDPE composites was obtained at a CSF content of 50% and ACQ concentration of 1%. When treated with zinc borate(ZB), the tensile strength of the composite increased with the increasing ZB concentration, but the flexural strength, flexural modulus and impact strength firstly increased and then decreased accordingly. In this case, the optimum mechanical property of CSF/HDPE composites was obtained at a CSF content of 50% and ZB concentration of 2%.
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基金
收稿日期:2015-07-21 修回日期:2016-01-13
基金项目:国家林业公益性行业科研专项项目(201204802); 国家自然科学基金项目(31170529)
第一作者:惠冬雪(573551223@qq.com)。*通信作者:韩广萍(guangping.han@nefu.edu.cn),教授。
引文格式:惠冬雪,韩广萍,程万里. 防腐剂预处理玉米秸秆皮/HDPE复合材料制备及其力学性能研究[J]. 南京林业大学学报(自然科学版),2016,40(3):137-142.
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