可逆CO2响应型开关聚合物的合成及性能评价
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国家自然科学基金项目(面上项目,重点项目,重大项目)


The Synthesis of CO2-Switchable Copolymer and Its Performance Evaluation
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    摘要:

    以N-(3-二甲氨基丙基)甲基丙烯酰胺(DMAPMA)和丙烯酰胺(AM)为单体,以过硫酸铵和亚硫酸氢钠为引发剂进行自由基聚合,合成了一种CO2/N2开关响应型聚合物。利用单因素实验得出了具有最佳CO2/N2开关响应性能的开关聚合物合成条件为:n(AM):n(DMAPMA)为 4:1,单体总质量分数为25%,引发剂加量(n((NH4)2S2O8):n(NaHSO3)为2:3)为反应单体质量的0.2%,反应温度40癈,反应时间4h。用FTIR、1HNMR对产物进行了结构表征。检测和分析了聚合物水溶液在通入CO2/N2前后的电导率、Zeta电位和粒径变化,结果表明合成的产物具有可逆的CO2/N2开关响应性能;用扫描电镜发现通入CO2前后聚合物在水溶液中形貌发生了显著变化;对以聚合产物为乳化剂的柴油和水形成的乳状液依次通入CO2和N2,实验结果表明CO2/N2能将聚合产物存在的油水混合体系快速破乳/乳化。

    Abstract:

    A copolymer with the performances of being responsive to CO2/N2 simulating, was synthesized by free radical polymerization in aquesous solution, using dimethylamino propyl methyl methacrylamid and acrylamide as the reactive monomers and ammonium persulfate as the initiators. The synthetic conditions with optimum property of CO2/N2 responsiveness were achieved by single factor experiment, which was with the result of molar ratio of AM and DMAPMA being 4:1, mass fraction of monomers being 25%, the dosage of initiator being 0.2% of the total mass of monomers, the ractive temperature being 40癈, the reactive time being 4h. At the first, The structure of the products were characterized by FTIR and 1HNMR. What’s more, The electronic conductivity , Zeta potential and particle size of aqueous copolymer solution on the condition of CO2/N2 were measured, which of the result showed that the products can be highly switchable by CO2/N2 simulating and the process was reversible. A remarkble change of the surface morphology of P(DMAPMA-AM) in aqueous solution between dealing with CO2 and without CO2 were measured. It was showed that the emulsions formed by mixing of diesel and pure water can be emulsification and demusification reversibly on the condition of CO2/N2 when P(DMAPMA-AM) was added to the mixed solution as the emulsifier after carbon dioxide and nitrogen were bubbled through the solution mixed of diesel and water with P(DMAPMA-AM) as the emulsifier.

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康良,敬显武,鲁红升,黄志宇.可逆CO2响应型开关聚合物的合成及性能评价[J].精细化工,2017,34(8):

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  • 收稿日期:2016-11-30
  • 最后修改日期:2017-02-27
  • 录用日期:2017-03-17
  • 在线发布日期: 2017-07-03
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