基于纤维素-NaOH脲体系的超吸收性水凝胶的制备及研究  

Preparation and Study of Super Absorbent Hydrogels Based on Cellulose-NaOH Urea System

作　　者：曲天宇 QU Tian-yu(Beijng University of Chemical Engineering,Beijing 10000,China)

机构地区：[1]北京化工大学,北京10000

出　　处：《佳木斯大学学报（自然科学版）》2018年第5期747-749,825,共4页Journal of Jiamusi University：Natural Science Edition

摘　　要：通过羧甲基纤维素(CMC)与纤维素在NaOH/脲体系中共混,以环氧氯丙烷(ECH)作为交联剂进行化学交联,制备了具有高吸水性的水凝胶。凝胶的结构和表征通过傅立叶变换红外(FT-IR)、热重分析以及扫描电子显微镜(SEM)进行了测定。CMC有助于增加孔道的尺寸,而纤维素在水凝胶中用作背景骨架以支撑整体结构。在蒸馏水和不同体液中的平衡溶胀率惊测定,在水中的最大溶胀率可达1000且仍保持稳定的凝胶外观。此外,该水凝胶在NaCl或CaCl2溶液中显示出智能溶胀和收缩,通过CMC含量的改变,将对牛血清蛋白(BSA)有控释行为,这种纤维素水凝胶在生物材料方面有一定的应用前景。In this paper, hydrogels with high water absorption were prepared by blending carboxymethyl cellulose （CMC） with cellulose in NaOH / urea system and using epoxy chloride （ECH） as crosslinking agent. The structure and characterization of the gel were determined by Fourier transform infrared （FT-IR）, thermo gravimetric analysis and scanning electron microscopy （SEM）. The results show that CMC helps to increase the size of the pores, while cellulose acts as a background skeleton in the hydrogel to support the bulk structure. The equilibrium swelling rate in distilled water and in different body fluids was determined and the results showed that the maximum swelling rate in water was up to 1000 and still maintained a stable gel appearance. In addition, the hydrogels showed smart swelling and contraction in NaCl or CaCl2 solutions, and the controlled-release behavior on bovine serum albumin （BSA） could be altered by changing the CMC content. This cellulose hydrogel has certain application prospects in biological materials.

关 键 词：蛋白质 胶体 吸收 高吸收性水凝胶 羧甲基纤维素 纤维素 智能溶胀 控释 

分 类 号：TQ028.8[化学工程]