壳聚糖基高吸水性树脂的微波辐射制备及其溶胀动力学  

Peparation and swelling kinetics of chitosan-based superabsorbent resin by microwave radiation

作　　者：甘颖[1] 戴长奇 刘文武 房彦一 GAN Ying;DAI Changqi;LIU Wenwu;FANG Yanyi(School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学化学工程学院,淮南232001

出　　处：《辐射研究与辐射工艺学报》2022年第2期8-17,共10页Journal of Radiation Research and Radiation Processing

基　　金：安徽理工大学创新创业训练计划项目(S201910361177)资助。

摘　　要：以壳聚糖(CS)、丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为原料,采用微波辐射法,通过接枝聚合反应合成了CS-g-P(AM-co-AMPS)高吸水性树脂。通过傅里叶变换红外光谱、X射线衍射和扫描电镜分析了树脂的结构,推测了反应机理,并利用热重技术研究了树脂在氮气气氛中的热分解动力学。此外,还探讨了树脂在盐溶液中的吸液倍率并研究了树脂的溶胀动力学。结果显示:CS与AM、AMPS之间发生了接枝聚合反应,树脂形成较明显的网状结构,CS质量分数为10%时,树脂的吸水倍率为1332 g/g;树脂的吸液倍率随着无机盐溶液浓度和金属价态的增加而减少;根据Kissinger法求得树脂的热分解活化能为223.65 kJ/mol,指前因子为3.6×10^(17) s^(‒1),由Crane法求得其反应级数为2.14。树脂的溶胀过程满足准二级动力学模型,水溶液内扩散符合Non-Fickian扩散过程。CS-g-PAM/AMPS superabsorbent resin was prepared by graft copolymerization of chitosan(CS),acrylamide(AM),and 2-acrylamido-2-methylpropanesulfonic acid(AMPS)by microwave radiation.The structure and morphology of the superabsorbent resin were characterized by Fourier-transform infrared spectroscopy,X-ray diffraction,and scanning electron microscopy.The mechanism of the reaction was also examined.The thermal decomposition process of resin in a nitrogen atmosphere was studied using thermogravimetric analysis.The absorption capacity of the resin in different concentrations of salt solution and the swelling kinetics of the resin were also discussed.The results showed that the resin with a uniform three-dimensional network was synthesized.When the mass fraction of CS was 10%,the resin showed the highest water absorption of 1332 g/g.The absorption capacity of the superabsorbent resin decreased with the increasing concentrations of inorganic salt solution and metal valence state.The corresponding kinetic parameters,such as the activation energy(E),pre-exponential factor(A),and reaction order(n),were obtained according to the Kissinger and Crane methods.The values of E,A,and n were approximately 223.65 kJ/mol,3.6×10^(17) s^(‒1),and 2.14,respectively.The swelling process of the resin satisfied the pseudo-second-order kinetic model,and the diffusion in aqueous solution conformed to the non-Fickian diffusion process.

关 键 词：高吸水性树脂 壳聚糖 微波辐射 辐射接枝 动力学 

分 类 号：TL13[核科学技术—核能科学]