期刊
APPLIED CLAY SCIENCE
卷 72, 期 -, 页码 196-200出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.clay.2013.01.012
关键词
Hydrogels; Ionomer; Mechanical properties; Nanocomposites; 2-Acrylamido-2-methylpropane sulfonic acid (AMPS); Acrylic acid (AA)
资金
- Natural Science Foundation of China [51163015]
- Program for New Century Excellent Talents in University [NCET-11-1072]
- Startup Foundation for Doctors of Xinjiang University, China [BS100116]
The poor stability of clay dispersion in the presence of ionic species presents a challenge for preparing ionic clay polymer nanocomposite (CPN) transparent hydrogel with desired strength. The transparent and tough ionic hydrogels are highly demanded as potential material options for contact lens or ophthalmic implants. Here we reported an ionic CPN hydrogel with combined high transparency and mechanical properties synthesized via in-situ copolymerization of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and acrylic acid (AA) in Laponite dispersion. The ionic transparent CPN can have strength of 189 kPa and a strain of 1780% which is likely a result of uniformly dispersed Laponite platelets in the structure. A synergistic interaction between acylamino and sulfonic acid functional groups was found to play a key role in the stable dispersion of Laponite. This work provided a new way to prepare transparent ionic CPN hydrogels. (C) 2013 Elsevier B.V. All rights reserved.
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