肿胀 的
自愈水凝胶
壳聚糖
材料科学
极限抗拉强度
动力学
傅里叶变换红外光谱
蒸馏水
扩散
复合材料
膨胀能力
化学工程
聚合物
高分子化学
化学
色谱法
工程类
物理
热力学
量子力学
作者
Emil Budianto,Annissa Amalia
出处
期刊:Journal of Polymer Engineering
[De Gruyter]
日期:2020-07-01
卷期号:40 (7): 551-560
被引量:41
标识
DOI:10.1515/polyeng-2019-0169
摘要
Abstract In this research, three modified chitosan-based hydrogels are synthesized, i.e., a crosslinked chitosan hydrogel and semi- and fully-interpenetrating polymer network (IPN) chitosan hydrogels fabricated using poly(N-vinyl-pyrrolidone). A non-modified chitosan hydrogel was also synthesized as a control. These samples were compared regarding their swelling behavior and mechanical properties. The hydrogels were characterized by Fourier Transform Infrared (FTIR) analysis and microscopy observations. The effect of crosslinking on the swelling capacity and on the swelling kinetics were evaluated in distilled water, simulated gastric fluid (SGF), and simulated intestinal fluid (SIF) at 37 °C, and the data were interpreted using various kinetic models. Finally, the mechanical properties were evaluated based on the tensile strength using a universal tensile testing machine. The results revealed that the swelling process conformed to the Schott model (pseudo-second-order kinetics), with Fickian diffusion as the diffusion mechanism type. The hydrogels all showed similar trends in their swelling kinetics. However, the full-IPN hydrogel exhibited the lowest equilibrium swelling capacity and the highest swelling rate. The mechanical test results indicate that the crosslinking model affects the resulting tensile strength.
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