以蔗渣木质素和丙烯酰胺为原料,制备了耐高盐木质素改性丙烯酰胺水凝胶。采用单因素实验考察了木质素与丙烯酰胺的质量比、木质素与水的固液比、反应温度、引发剂用量、交联剂用量这5个因素对木质素改性丙烯酰胺水凝胶吸液量的影响。进一步利用正交试验得出各影响因素的最优条件,并利用红外光谱、扫描电镜对最优条件下的木质素改性丙烯酰胺水凝胶进行表征。结果表明:不同因素对木质素改性丙烯酰胺水凝胶吸液量的影响顺序为反应温度>交联剂用量>蔗渣木质素与丙烯酰胺的质量比>引发剂用量>木质素与水的固液比,在优化条件下制备木质素改性丙烯酰胺水凝胶的耐盐性较好。此外,红外光谱和扫描电镜结果显示提高木质素的纯度有利于其与丙烯酰胺的共聚反应。
The high-salt lignin-modified acrylamide(AAM) hydrogel was prepared using the raw materials of bagasse lignin and acrylamide.The impacts of the mass ratio of lignin to acrylamide,solid-liquid ratio of lignin to water,reaction temperature,amount of initiator and amount of crosslinking agent on the amount of glue absorbed were investigated by the single factor experiment.The optimal conditions of each influencing factor were further determined by orthogonal test.The hydrogel under optimal conditions was characterized by FT-IR and SEM.The results showed that the order of influence of different factors on the liquid absorption ofthe hydrogel was reaction temperature>amount of crosslinking agent>the mass ratio of bagasse lignin to acrylamide>amount of initiator>solidification of lignin and water.And the salt resistant of the hydrogel prepared under optimized conditions was better.In addition,the results of FT-IR and SEM showed that increasing the purity of lignin was advantageous for its copolymerization with acrylamide.
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基金资助
国家自然科学基金(201868008和21606056);广西民族大学2017年研究生教育创新计划(gzun-chxps201818)
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