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A transparent Laponite polymer nanocomposite hydrogel synthesis via in-situ copolymerization of two ionic monomers
Affiliation:1. College of Chemistry, Sichuan University, Chengdu 610064, People''s Republic of China;2. College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, People''s Republic of China;1. Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang, Uyghur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China;2. College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China;3. Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China;1. School of Mechanical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China;2. Department of joint and bone surgery, the First Affiliated Hospital of Naval Military Medical University, 168 Changhai Road, Shanghai 200233, China;3. Department of Orthopedics, The Second Affiliated Hospital and Yuying Children''s Hospital of Wenzhou Medical University, 109 Xueyuan Road, Wenzhou 325000, China
Abstract: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.
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