采用抗坏血酸和过硫酸钾作为氧化还原引发体系,在中性水溶液中快速产生自由基,并通过半纤维素微粒(HP)维持自由基稳定,加速丙烯酰胺(AM)和N,N-亚甲基双丙烯酰胺(MBA)的聚合,室温下63s制得半纤维素基水凝胶(HP-VC-PAM)。通过正交试验优化了合成工艺,确定了原料最佳质量配比为AM∶HP∶MBA=2.50∶1.00∶0.06,制备的水凝胶展现出优异的溶胀性和保水性。溶胀动力学研究显示,HP-VC-PAM水凝胶的溶胀过程更符合二阶动力学模型。该水凝胶具有三维网络结构,富含酰胺基和羟基,具有良好的亲水性和保水性,溶胀度高达16.6g/g,保水率提升至36%。
Ascorbic acid and potassium persulfate were employed as a redox initiation system to rapidly generate radicals in a neutral aqueous solution.Hemicellulose particles (HP) stabilized the radicals and accelerated the polymerization of acrylamide (AM) and N,N′-methylenebisacrylamide (MBA) to obtain hemicellulose-based hydrogel (HP-VC-PAM) within 63s at room temperature.The synthesis process was optimized via orthogonal experiments,determining the optimal mass ratio of AM∶HP∶MBA as 2.50∶1.00∶0.06.The resulting hydrogel exhibited superior swelling and water retention properties.Swelling kinetics studies revealed that the HP-VC-PAM hydrogel's swelling behavior aligned with a second-order kinetic model.The hydrogel featured a three-dimensional network structure rich in amide and hydroxyl groups,endowing it with excellent hydrophilicity and water retention,a swelling capacity of 16.6g/g and a water retention rate of 36%.
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基金资助
新疆生产建设兵团财政科技计划(2022DB025);塔里木大学校长基金项目(TDZKSS202323)
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