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对芦荟表皮进行前处理,得到芦荟纤维素。选用ZnCl2对芦荟纤维素进行溶解,探讨ZnCl2浓度、溶解时间及溶解温度等因素对芦荟纤维素溶解性能的影响;以水及无水乙醇为凝固浴,使芦荟纤维素再生,得到再生芦荟纤维素,通过红外光谱、X-衍射、热重分析等测试手段对再生纤维素进行表征。研究结果表明:芦荟纤维素在70%(质量分数)的ZnCl2溶液中,60℃温度条件下溶解2 h,溶解效果较佳;通过红外光谱测试分析表明,得到的再生纤维素中不含木质素,显示纤维素的特征峰;通过X-射线衍射谱图分析,芦荟纤维素的再生以蒸馏水作为凝固浴,再生效果较好,再生芦荟纤维素基本符合纤维素Ⅰ和Ⅱ混合晶体结构;热重测试分析表明,再生纤维素的热稳定性较好。
Aloe epidermis pre-treatment, aloe vera cellulose. ZnCl2 was chosen to dissolve the cellulose of aloe vera, and the effects of ZnCl2 concentration, dissolution time and dissolving temperature on the dissolubility of aloe cellulose were discussed. Cellulose aloe was regenerated by using water and anhydrous ethanol as coagulation bath to regenerate aloe vera cellulose The regenerated cellulose was characterized by means of infrared spectroscopy, X-ray diffraction and thermogravimetry. The results showed that the aloe cellulose was dissolved in 70% ZnCl2 solution at 60 ℃ for 2 h, and the dissolution was better. The results of FTIR showed that the regenerated cellulose contained no lignin , Showing the characteristic peak of cellulose; through the X-ray diffraction spectrum analysis, the regeneration of aloe vera cellulose with distilled water as the coagulation bath, the regeneration effect is better, the regenerated aloe cellulose basically conforms to the mixed crystal structure of cellulose I and II; Test analysis shows that the thermal stability of regenerated cellulose is better.