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Updated: Feb 1, 2026

Preparation of DNA-crosslinked Polyacrylamide Hydrogels
Published on: August 27, 2014
Preparation of temperature-sensitive Xanthan/NIPA hydrogel using citric acid as crosslinking agent for bisphenol A
Xi Chen1, Panyu Li1, Yan Kang1
1Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
Abstract:
Hydrogels are emerging materials in pollutant treatment due to their high absorbability and environmental friendliness. Herein, a novel temperature-sensitive hydrogel based on xanthan gum (XG) and N-isopropylacrylamide (NIPA) was successfully synthesized in a water system using low-cost citric acid as crosslinking agent. The lower critical solution temperature of the honeycomb macroporous XG/NIPA hydrogels was 40 °C. Meanwhile, the hydrogels had good water-absorption capacity and the swelling degree reached up to 70.1. Using XG/NIPA hydrogels to absorb bisphenol A (BPA), the maximum adsorption capacity was as high as 458 mg/g. The process was a multilayer adsorption and the rate-controlling step is chemisorption. Thus, the temperature-sensitive XG/NIPA hydrogel had great potential in absorbing BPA from aqueous solutions.
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