Synthesis and characterization of citric acid-based pH-sensitive biopolymeric hydrogels

被引：0
|
作者：
D. S. Franklin
S. Guhanathan
机构：
[1] Mononmaniam Sundaranar University,Department of Chemistry
[2] C. Abdul Hakeem College of Engineering and Technology,Department of Chemistry
[3] Muthurangam Government Arts College,PG and Research Department of Chemistry
来源：
Polymer Bulletin | 2014年 / 71卷
关键词：
Hydrogels; Swelling studies; Swelling equilibrium; pH sensitive; Spectral techniques;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Biocompatible hydrogels based on citric acid (CA) with varying glycol unit, viz., ethylene glycol (EG), diethylene glycol and triethylene glycol were prepared along with acrylic acid. The formations of various hydrogels were confirmed using spectral techniques such as FT-IR and 1H NMR. Thermal stability (thermogravimetric analysis, DTA and differential scanning calorimetry) and morphology (SEM) of the synthesized hydrogels were investigated. Swelling studies of hydrogels at various pH values ranging from 4.0 to 10.0 were also investigated. The results of swelling studies show that the percentage of swelling is comparatively higher at higher pH than lower pH. Swelling equilibrium for various hydrogels was also found. Increased composition of CA in hydrogels at different pH values of 4.0, 6.0, 7.4, 8.0 and 10.0 enhanced the swelling equilibrium.
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页码：93 / 110
页数：17
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