丙烯酸壳聚糖交联树脂的制备及其性能研究

Preparation and performance study of chitosan-acrylic acid cross-linked resin

摘要

以壳聚糖(CS)和丙烯酸(AA)为原料,通过接枝与交联共聚反应制备了壳聚糖—丙烯酸交联树脂(CSAA).利用扫描电子显微镜(SEM)和傅里叶变换红外光谱(FTIR)对CSAA的微观形貌和化学结构进行表征,并系统研究了不同制备条件对树脂表面张力及吸水率的影响.结果表明,在壳聚糖与丙烯酸体积比为1∶1、反应时间1h、反应温度35℃、交联剂用量1mL的条件下,所得树脂表面张力性能最佳.在此优化条件下,采用1mol/L NaOH溶液作为固化液,CSAA表现出良好的吸水性能和较高产率.随着吸水时间延长,树脂吸水率逐渐上升,50min后趋于平衡,此时吸水率达到86%.

Abstract

Chitosan (CS) and acrylic acid (AA) were used as raw materials to prepare chitosan-acrylic acid cross-linking resin (CSAA) by grafting and cross-linked copolymerization reactions. The microscopic morphology and chemical structure of CSAA were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR), and the effects of different preparation conditions on the surface tension and water absorption rate of the resin were systematically investigated. The results show that under the conditions of a volume ratio of chitosan to acrylic acid of 1∶1, a reaction time of 1 h, a reaction temperature of 35℃, and a dosage of crosslinked agent of 1 mL, the surface tension performance of the resin obtained is the best. Under these optimized conditions, with 1 mol/L NaOH solution used as the curing liquid, CSAA demonstrated excellent water absorption performance and a relatively high yield. As the water absorption time increases, the water absorption rate of the resin gradually rises and tends to achieve equilibrium after 50 minutes, at which point the water absorption rate reaches 86%.

关键词

壳聚糖 / 表面张力 / 吸水率 / 交联 / 丙烯酸

Key words

chitosan / surface tension / water absorption rate / cross-linked / acrylic acid

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