线性P（NIPA-co-SA）水凝胶制备及温敏性能

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...

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Bibliographic Details
Published in煤炭学报 Vol. 39; no. 1; pp. 154 - 160
Main Author 邓军 杨漪 唐凯
Format Journal Article
LanguageChinese
Published 2014
Subjects
N-异丙基丙烯酰胺
体积相转变
水凝胶
温度敏感性
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Summary: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。
Bibliography:N-isopropylacrylamide ;hydrogels ; thermosensitivity ; volume phase transition
11-2190/TD
DENG Jun ,YANG Yi ,TANG Kai （ 1. College of Energy Science ＆ Engineering,Xi＇ an University of Science and Technology,Xi＇ an 710054, China ;2. Xi＇ an. Public Security Fire Detachment Xi ＇ an 710065 ,China;3. Ministry of Scientific Research,Chinese People＇ s Armed Police Force Academy ,Langfang 065000,China）
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-linea
ISSN:0253-9993