PolyHIPEs块体的磺化改性及其吸附研究
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摘要
以乙酰磺酸酯为磺化剂,对不同内相比的高内相比乳液聚合所得多孔聚合物块体(polyHIPEs)进行磺化改性处理,通过傅立叶变换红外光谱(FT-IR)、电导滴定、紫外-可见-近红外分光光度计等对磺化产物及其吸附性能进行了表征。结果表明,polyHIPEs已被成功磺化,磺化后块体表面的亲水亲油性发生了明显的变化,其吸水性明显增强,而吸油性明显减弱。由于引入了带负电荷的磺酸基团(-SO3H),其对正离子或带正电荷的分子(如亚甲基蓝染料)具有较强的吸附性能。同时,磺化后的块体具有一定的pH敏感性。
A series of polymerized high internal phase emulsions( polyHIPEs) monoliths with different internal phase were sulfonated by acetyl sulfonate. The products and their absorption properties of the monoliths were characterized by FT-IR,conductometric titration,UV-vis-NIR spectrophotometer,etc. The results indicate that polyHIPEs were sulfonated successfully,leading to the surface of the monoliths changed from lipophilic to hydrophilic obviously,thus,the water absorption significantly enhanced,but oil absorption weakened distinctly. Due to the presence of-SO3 H groups with negative charge,the sulfonated monoliths exhibited strong absorption ability to positive ions or positively charged molecules,such as methylene blue dye. In addition,polyHIPEs after sulfonation showed a certain sensitivity to pH value.
A series of polymerized high internal phase emulsions( polyHIPEs) monoliths with different internal phase were sulfonated by acetyl sulfonate. The products and their absorption properties of the monoliths were characterized by FT-IR,conductometric titration,UV-vis-NIR spectrophotometer,etc. The results indicate that polyHIPEs were sulfonated successfully,leading to the surface of the monoliths changed from lipophilic to hydrophilic obviously,thus,the water absorption significantly enhanced,but oil absorption weakened distinctly. Due to the presence of-SO3 H groups with negative charge,the sulfonated monoliths exhibited strong absorption ability to positive ions or positively charged molecules,such as methylene blue dye. In addition,polyHIPEs after sulfonation showed a certain sensitivity to pH value.
引文
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[2]胡友根,周志平,盛维琛.多孔苯乙烯-二乙烯基苯共聚物微球的磺化及其对牛血清蛋白的吸附[J].离子交换与吸附,2010,26(4):334-343.
[3]Fang L,Xing R,Wu H,et al.Clean synthesis of biodiesel over solid acid catalysts of sulfonated mesopolymers[J].Sci China Chem.2010,53(7):1481-1486.
[4]张惠欣,朱玉超,王枫,等.磺化低聚壳聚糖的制备及其阻垢性能的研究[J].化学研究与应用,2013,25(3):377-381.
[5]张惠欣,王枫,王春海,等.氨基磺酸改性杂多糖的阻垢分散性能初探[J].化学研究与应用,2013,25(10):1446-1451.
[6]Silverstein MS.Emulsion-templated porous polymers:A retrospective perspective[J].Polym,2014,55(1):304-320
[7]Audouin F,Heise A.Surface-initiated RAFT polymerization of NIPAM from monolithic macroporous polyHIPE[J].Eur Polym J,2013,49(5):1073-1079
[8]白蕊,魏志波,张发爱.搅拌对高内相比乳液法制备多孔聚合物的影响[J].胶体与聚合物.2013,31(1):6-8.
[9]陆威,王姗姗,鲁德平,等.苯乙烯的悬浮聚合及聚苯乙烯磺化[J].现代塑料加工应用.2005,17(4):8-11.
[10]申书昌,李媛媛,柏叶春.St-DVB基质阳离子交换固相萃取填料的研制及应用[J].化学研究与应用,2011,23(5):564-567.
[11]Chen Z,Zhou L,Zhang FA,et al.Multicarboxylic hyperbranched polyglycerol modified SBA-15 for the adsorption of cationic dyes and copper ions from aqueous media[J].Appl Surfa Sci.2012,258:5291-5298.
[12]Ho YS,McKay G.The kinetics of sorption of divalent metal ions onto sphagnum moss peat[J].Water Resea.2000,34(3):735-742.
[13]Senthilkumaar S,Varadarajan P R,Porkodi K,et al.Adsorption of methylene blue onto jute fiber carbon:kinetics and equilibrium studies[J].J Collo Interfa Sci,2005,284(1):78-82.