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为探讨阻湿剂氯化石蜡、甘油对麦秸秆/植物蛋白胶复合材料阻湿性能、微观结构及化学结构的影响,采用热压成型方法制得添加2种阻湿剂的复合材料。分别测试麦秸秆/植物蛋白胶复合材料的力学性能、吸水率和吸湿率变化,采用FTIR分析其官能团的变化,测试接触角分析其润湿性能,并用体视显微镜观察分析复合材料弯曲断面微观结构。结果表明:添加氯化石蜡麦秸秆/植物蛋白胶复合材料弯曲强度、弯曲弹性模量最大,比未添加复合材料分别提高67%、129%,添加甘油麦秸秆/植物蛋白胶复合材料冲击强度较大,比未添加复合材料提高44%;添加氯化石蜡和甘油麦秸秆/植物蛋白胶复合材料2h吸水厚度膨胀率小于未添加复合材料;随着吸湿时间的增加,3种复合材料吸湿率均呈上升趋势,其中添加氯化石蜡麦秸秆/植物蛋白胶复合材料吸湿平衡率最小为4.3%;添加氯化石蜡麦秸秆/植物蛋白胶复合材料的弯曲断面微观结构较好,内部结合紧密,表面纤维暴露较少,阻湿性最好。
In order to investigate the effect of the wetting agent chlorinated paraffin and glycerol on moisture resistance, microstructure and chemical structure of wheat straw / plant protein gum composites, two kinds of composite materials with two kinds of moisture retarders were prepared by hot press molding. The mechanical properties, water absorption and moisture absorption of wheat straw / plant protein gum composites were tested respectively. The functional groups were analyzed by FTIR. The contact angle was used to analyze the wettability. The microstructure of the composites was analyzed by stereomicroscope. . The results showed that the flexural strength and flexural modulus of chlorinated paraffin straw / plant protein gum composites were the highest, which were 67% and 129% higher than that of the uncoated composites respectively. The impact strength of glycerol / wheat straw composted composites Which was 44% higher than that of the non-added composites. The swelling rate of water absorption of chlorinated paraffin and glycerol wheat straw / plant protein gum composites was less than that of the non-added composites at 2h. With the increase of moisture absorption time, the moisture absorption of the three composites The average moisture absorption balance of chlorinated paraffin straw / plant protein gum composites is 4.3%. The microstructure of curved section of chlorinated paraffin straw / plant protein gum composites is better, the internal binding is close, the surface Less fiber exposure, moisture resistance is best.