乙醇对HIPEs法制备吸油憎水树脂及其性能的影响
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摘要
以苯乙烯、二乙烯基苯为共聚单体,过硫酸铵为引发剂,十六烷基三甲基溴化铵为乳化剂,采用油包水型高内相比乳液模板法合成了聚苯乙烯/二乙烯基苯(PSD)多孔树脂。考察了相对于分散相不同体积分数的乙醇对乳液稳定性及PSD的密度、吸(释)液性、溶胀率等性能的影响。发现随着乙醇用量的增加,反应体系难以形成稳定的乳液,其密度、吸液性、溶胀性下降,而对甲苯的释放速率增加;PSD多孔材料经水-乙醇抽提后吸水率降低至0.26 cm3/g,而吸甲苯率仍达15.60~18.42 cm3/g,表现出明显的吸油憎水性能。
Using styrene and divinylbenzene as comonomers,ammonium persulfate as initiator,and hexadecyltrimethylammonium bromide as emulsifier,porous polystyrene / divinylbenzene(PSD) was synthesized by high internal phase emulsions(HIPEs) as template.The effects of ethanol volume fraction(relative to dispersed phase) on the emulsion stability and the properties of the PSD,including density,absorption(release) effects of liquid,and swelling ratio,were investigated.It was more difficult to form a stable emulsion with the increase of alcohol content.In addition,with the increase of alcohol content,the density and absorption of the liquid and the swelling ratio of the PSD decreased,while the release of toluene increased.It is worth mentioning that,after the PSDs were extracted by waterethanol,the absorption rate of water decreased to 0.26 cm3/ g,while the absorption rate of toluene was still 15.60 ~ 18.42 cm3/ g.Thus in this way a hydrophobic and lipophilic resin could be obtained.
Using styrene and divinylbenzene as comonomers,ammonium persulfate as initiator,and hexadecyltrimethylammonium bromide as emulsifier,porous polystyrene / divinylbenzene(PSD) was synthesized by high internal phase emulsions(HIPEs) as template.The effects of ethanol volume fraction(relative to dispersed phase) on the emulsion stability and the properties of the PSD,including density,absorption(release) effects of liquid,and swelling ratio,were investigated.It was more difficult to form a stable emulsion with the increase of alcohol content.In addition,with the increase of alcohol content,the density and absorption of the liquid and the swelling ratio of the PSD decreased,while the release of toluene increased.It is worth mentioning that,after the PSDs were extracted by waterethanol,the absorption rate of water decreased to 0.26 cm3/ g,while the absorption rate of toluene was still 15.60 ~ 18.42 cm3/ g.Thus in this way a hydrophobic and lipophilic resin could be obtained.
引文
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[6]常海涛,鲁在君.高内相比乳液模板法合成多孔材料的研究进展[J].化学通报,2007,(11):830-834.
[7]Zhang S,Chen J,Perchyonok V T.Stability of high internal phase emulsions with sole cationic surfactant and its tailoring morphology of porous polymers based on the emulsions[J].Polymer,2009,50(7):1723-1731.
[8]Zhang S,Chen J.Synthesis of open porous emulsion-templated monoliths using cetyltrimethylammonium bromide[J].Polymer,2007,48(11):3021-3025.
[9]Ho Y S,McKay G.The kinetics of sorption of divalent metal ions onto sphagnum moss peat[J].Water Research,2000,34(3):735-742.
[2]Wong L L C,Baiz Villafranca P M,Menner A,et al.Hierarchical polymerized high internal phase emulsions synthesized from surfactant-stabilized Emulsion Templates[J].Langmuir,2013,29(20):5952-5961
[3]Kovacic S,Matsko N B,Jerabek K,et al.On the mechanical properties of HIPE templated macroporous poly(dicyclopentadiene)prepared with low surfactant amounts[J].Journal of Materials Chemistry A,2013,1(3):487-490
[4]Wong L L C,Ikem V O,Menner A,et al.Macroporous polymers with hierarchical pore structure from emulsion templates stabilised by both particles and surfactants[J].Macromolecular Rapid Communication,2011,32(19):1563-1568
[5]Mao D,Li T,Liu H,et al.M.Preparation of macroporous polyHIPE foams via radiation-induced polymerization at room temperature[J].Colloid Polymer Science,2013,291(7):1649-1656
[6]常海涛,鲁在君.高内相比乳液模板法合成多孔材料的研究进展[J].化学通报,2007,(11):830-834.
[7]Zhang S,Chen J,Perchyonok V T.Stability of high internal phase emulsions with sole cationic surfactant and its tailoring morphology of porous polymers based on the emulsions[J].Polymer,2009,50(7):1723-1731.
[8]Zhang S,Chen J.Synthesis of open porous emulsion-templated monoliths using cetyltrimethylammonium bromide[J].Polymer,2007,48(11):3021-3025.
[9]Ho Y S,McKay G.The kinetics of sorption of divalent metal ions onto sphagnum moss peat[J].Water Research,2000,34(3):735-742.