,Synthesis and properties of p(NIPA-co-NVP)/clay hydrogels by radiation polymerization

• 作 者: SONG Hongyan YANG Mingcheng ZHU Chengshen HE Suqin GAO Ya
• 机 构: School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, China“,”Isotope
• 出 处: 核技术（英文版）
• 发表日期: 2007年1期
• 关键词: Thermo-sensitive hydrogels Copolymer hydrogels Radiation polymerization Clay Low

In this study, hydrogels of P(NIPA-co-NVP)/clay were synthesized by γ-ray radiation. Different thermo-sensitive hydrogels were made under different experimental conditions such as dose, monomer ratio, and content of clay. X-ray diffraction shows that the layer distance between Na-clays is changed from 1.6 to 2.7 nm because Na-clay pieces can be intercalated or exfoliated by HTMAB, and that between P(NIPA-co-NVP)/clay pieces is 3.4 nm.The swelling property tests show that the LCST of P(NIPA-co-NVP) is higher than PNIPA. With the increase of NVP content, LCST is higher. As the ratio of NIPA/NVP is 95/5, hydrogel shows the best swelling property and LCST is 37℃. LCST of P(NIPA-co-NVP)/clay hydrogel is not changed, but the strength and swelling properties are better.