Influence of crosslinker amount on swelling and gel properties of hectorite/poly(acrylamide/itaconic acid) nanocomposite hydrogels

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• 作者：Tao Wan ; Wenzhong Cheng ; Zhiling Zhou ; Min Xu…
• 关键词：Hydrogel ; Nanocomposite ; Hectorite ; Microemulsion Polymerization
• 刊名：Korean Journal of Chemical Engineering
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：32
• 期：7
• 页码：1434-1439
• 全文大小：402 KB
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• 作者单位：Tao Wan (1) (2)
  Wenzhong Cheng (1)
  Zhiling Zhou (1)
  Min Xu (1)
  Chuzhang Zou (1)
  Ruixiang Li (1)
  
  1. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, Chengdu University of Technology, Chengdu, Sichuan, 610059, China
  2. State Key Lab of Geohazard Prevention & Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan, 610059, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Industrial Chemistry and Chemical Engineering
  Catalysis
  Materials Science
  Biotechnology
  
• 出版者：Springer New York
• ISSN：1975-7220

文摘

A new hectorite/poly(acrylamide/itaconic acid) nanocomposite hydrogel was synthesized by inverse microemulsion polymerization. The effects of crosslinker amount on water absorbency and salt absorbency, swellability, pH-sensitivity, gel strength, temperature-and shear-resistance were investigated. Water and salt absorbencies, pH-sensitivity and swellability decreased, while gel strength and temperature-and shear-resistance increased with increasing crosslinker amount. Nanocomposite hydrogels had good thermal stability with onset decomposing temperature of 252 °C. The as-synthesized hydrogel particles were regular and spherical-like and had an average particle size of 43 nm in the range of 30-5 nm. Hectorite clay platelets were exfoliated and transformed into amorphous structure.