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首页> 外文期刊>Journal of Applied Polymer Science >Influence of Chain Length of Diol on the Swelling Behavior of Citric Acid Based pH Sensitive Polymeric Hydrogels: A Green Approach
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Influence of Chain Length of Diol on the Swelling Behavior of Citric Acid Based pH Sensitive Polymeric Hydrogels: A Green Approach

机译：二醇链长对基于柠檬酸的pH敏感聚合物水凝胶溶胀行为的影响：一种绿色方法

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摘要

Synthesis of pH-sensitive hydrogels of citric acid with varying diol units viz., 1,2 Ethane diol, 1,4 butane diol, and 1,6 hexane diol along with methacrylic acid towards the solventless green approach. The formations of the hydrogels were identified using FTIR spectroscopy. Thermal characterization (thermo gravimetric analysis, differential thermal analysis (DTA), and differential scanning calorimetry) and morphology of the synthesized hydrogels have been investigated. Swelling studies of hydrogels in various pH ranging from 4.0 to 10.0 have been investigated. The results of the swelling studies implied that percentage of swelling comparatively higher at neutral pH (7.4) than at acidic and alkaline pH. The inverse relationship was noticed, where ascending the diol units of hydrogel in swelling equilibrium. The hydrogels with the increasing chain length show a noticeable pH sensitivity and which could be considered as smart hydrogel. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41403.
机译：向无溶剂绿色方法合成具有变化的二醇单元的柠檬酸的pH敏感水凝胶，即1,2乙烷二醇，1,4丁二醇和1,6己二​​醇以及甲基丙烯酸。使用FTIR光谱鉴定水凝胶的形成。研究了合成水凝胶的热表征（热重分析，差热分析（​​DTA）和差示扫描量热法）和形态。已经研究了在4.0至10.0的各种pH范围内水凝胶的溶胀研究。溶胀研究的结果表明，在中性pH（7.4）下溶胀百分比相对高于在酸性和碱性pH下的溶胀百分比。注意到相反的关系，其中水凝胶的二醇单元在溶胀平衡中上升。具有增加的链长的水凝胶显示出显着的pH敏感性，并且可以认为是智能水凝胶。 （c）2014 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，41403。

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