线性P(NIPA-co-SA)水凝胶制备及温敏性能  

Preparation and thermosensitive property of linear P(NIPA-co-SA)hydrogels

作　　者：邓军[1] 杨漪[1,2] 唐凯[3] 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安市公安消防支队,陕西西安710065 [3]中国人民武装警察部队学院科研部,河北廊坊065000

出　　处：《煤炭学报》2014年第1期154-160,共7页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(51134019);教育部创新团队资助项目(IRT0856);973计划前期研究专项课题资助项目(2011CB411902)

摘　　要：采用自由基聚合法制备出了线性共聚物P（NIPA—CO—sA）水凝胶，利用傅里叶变换红外光谱仪、凝胶渗透色谱仪进行结构、分子链及其分布表征，借助浊度、黏度、DSC等手段表征了其温度敏感性能，并定量地研究了单体配比与P（NIPA—CO—SA）较低临界溶解温度（LCST）的数值关系。结果表明：P（NIPA—Co-SA）水凝胶具有温度敏感特性，P（NIPA—CO—SA）提高了聚N-异丙基丙烯酰胺（PNIPA）的LCST，且随着反应物中SA比例的提高，产物的LCST逐渐升高，但响应速率呈逐渐降低的趋势。建立了单体配比与LCST的非线性回归方程，可通过调节合成工艺参数实现水凝胶的LCST在30～90℃范围内可控，以满足煤炭火灾预防及控制需要。Linear P （NIPA-co-SA） hydrogelswere synthesized by free radical polymerization. The structure, molecular chain and distribution of P （NIPA-co-SA）were identified by FT-IR and GPC. The thermosensitivity of P（ NIPA-co- SA） was studied through viscosity, turbidity and DSC analysis. The numerical relations between monomer ratio and LCST of P （NIPA-co-SA）hydrogels were quantificationally researched. The results show that the P （NIPA-co-SA） hydrogels are thermosensitive, which enhance LCST of PNIPA. Along with raise of ratio of SA in reactant, the LCST of product gradually increases, but the response rate declines. The non-linear regression equation between LCST and monomers ratio was established,the LCST of hydrogels can be controlled in the range of 30-90 ℃ by adjusting synthesis process parameters, which meets the need of coal fire prevention and control.

关 键 词：N-异丙基丙烯酰胺 水凝胶 温度敏感性 体积相转变 

分 类 号：TD75[矿业工程—矿井通风与安全]