Abstract: In this paper，hemicelluloses/carbon nanotube composite hydrogels was designed and successfully prepared via free-radical polymerization route initiated by (NH4)2S2O8-Na2SO3 redox systems. The prepared hydrogels were characterized by scanning electron microscopy (SEM). The effects of the MAA/HC ratio，the amount of carbon nanotubes and pH on the swelling ratio of prepared hydrogels were investigated，and the experimental data were fitted using the swelling kinetic equations. The results showed that the swelling ratio decreased with the increase of MAA/HC ratio and the amount of carbon nanotube. The swelling ratio increased as the pH value of the solutions increased (pH≤11)，and decreased when the pH was beyond 11. The entire swelling process could be described by the Schott second-order kinetics model.

Key words: hemicellulose, carbon nanotube, hydrogels, swelling ratio

摘要： 采用 (NH4)2S2O8-Na2SO3为引发剂体系，N,N-亚甲基双丙烯酰胺（BIS）为交联剂，利用自由基聚合法成功制备了半纤维素/碳纳米管复合凝胶。用SEM对凝胶的结构形态进行了研究分析；研究了单体比例、碳纳米管含量和pH值对凝胶溶胀率的影响；并应用溶胀动力学方程对试验数据进行拟合。研究结果表明：半纤维素/碳纳米管复合凝胶的溶胀率随着甲基丙烯酸/半纤维素比例的增加而减小，随着碳纳米管含量的增加而减小；pH≤11时随pH值的增加而增大，pH>11时随pH值的增加而减小。拟合结果表明整个溶胀过程符合Schott二级动力学模型。

关键词: 半纤维素, 碳纳米管, 凝胶, 溶胀率