绿色稀释剂制备乙烯-三氟氯乙烯共聚物多孔膜
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摘要
采用乙酰柠檬酸三丁酯(ATBC)、对苯二甲酸二辛酯(DOTP)混合物为二元稀释剂,通过热致相分离(TIPS)法制备乙烯-三氟氯乙烯共聚物(ECTFE)多孔膜,用场发射扫描电子显微镜(FESEM)对样品的结构与性能进行表征。通过改变二元稀释剂的比例,考察二元稀释剂的组成对ECTFE多孔膜的结构与性能的影响。结果表明:随着DOTP在二元稀释剂中比例的增加,多孔膜结构从液-液(L-L)分相与固-液(S-L)分相并存逐渐转变为疏松的球晶结构。当二元稀释剂中DOTP的比例为50%时,ECTFE多孔膜的通量与单一稀释剂制得的ECTFE多孔膜通量相比提高1.5倍以上。
Porous poly(ethylene chlorotrifluoroethylene)(ECTFE) membrane was prepared by thermal induced phase separation(TIPS) with acetyl tributyl acetate(ATBC) and dioctyl terephthalate(DOTP) as binary diluents. The structure and performance of the samples were characterized by field emission scanning electron microscope(FESEM). The effects of binary diluent composition on the structure and performance of ECTFE porous membranes were investigated by changing the proportion of binary diluent. Results showed that with the increase of the proportion of DOTP in the binary diluent, the porous membrane structure changed from liquid-liquid(L-L) and the solid-liquid(S-L) phase separation structure to the loose spherulite structure. When the proportion of DOTP in the binary diluent was 50%, the flux of the ECTFE porous membrane was 1.5 times higher than that of the ECTFE porous membrane obtained by a single diluent.
Porous poly(ethylene chlorotrifluoroethylene)(ECTFE) membrane was prepared by thermal induced phase separation(TIPS) with acetyl tributyl acetate(ATBC) and dioctyl terephthalate(DOTP) as binary diluents. The structure and performance of the samples were characterized by field emission scanning electron microscope(FESEM). The effects of binary diluent composition on the structure and performance of ECTFE porous membranes were investigated by changing the proportion of binary diluent. Results showed that with the increase of the proportion of DOTP in the binary diluent, the porous membrane structure changed from liquid-liquid(L-L) and the solid-liquid(S-L) phase separation structure to the loose spherulite structure. When the proportion of DOTP in the binary diluent was 50%, the flux of the ECTFE porous membrane was 1.5 times higher than that of the ECTFE porous membrane obtained by a single diluent.
引文
[1] CUI Z,DRIOLI E,LEE Y M.Recent progress in fluoropolymers for membranes[J].Progress in Polymer Science,2014,39(1):164.
[2] LOGAN B E,ELIMELECH M.Membrane-based processes for sustainable power generation using water[J].Nature,2012,488:313.
[3] 陈阳,张玉亭,张春,等.中空纤维SAPO-34分子筛膜的制备及渗透汽化性能[J].南京工业大学学报(自然科学版),2018,42(1):46.
[4] 范苏,邱鸣慧,周邢,等.多通道TiO2超滤膜的制备及其在印染废水中的应用[J].南京工业大学学报(自然科学版),2011,33(1):44.
[5] 杨健,王晓琳,田丰,等.热致相分离法制聚偏氟乙烯微孔膜稀释剂的选择[J].高等学校化学学报,2008,29(9):1895.
[6] TANG Y,LIN Y,MA W,et al.Preparation of microporous PVDF membrane via tips method using binary diluent of DPK and PG[J].Journal of Applied Polymer Science,2010,118(6):3518.
[7] 林亚凯,唐元晖,马恒宇,等.热致相分离法制备聚偏氟乙烯微孔膜[J].膜科学与技术,2009,29(6):36.
[8] ARGASINSKI J K,LOOSBERGH M E.Case history long-term performance of a fluoropolymerlined process vessel[J].Materials Performance,2009,48(10):28.
[9] MILLER W A.How to choose a fluoropolymer[J].Chemical Engineering Science,1993,100(4):163.
[10] CLARK M A.Fluoropolymer linings:the low-cost advat-age[J].Chemical Engineering Science,1992,99(8):106.
[11] ROH I J,RAMASWAMY S,KRANTZ W B,et al.Poly(ethylene chlorotrifluoroethylene) membrane formation via thermally induced phase separation (TIPS)[J].Journal of Membrane Science,2010,362(1):211.
[12] DRIOLI E,SANTORO S,SIMONE S,et al.ECTFE membrane preparation for recovery of humidified gas streams using membrane condenser[J].Reactive & Functional Polymers,2014,79(6):1.
[13] KARKHANECHI H,RAJABZADEH S,NICOLO E D,et al.Preparation and characterization of ECTFE hollow fiber membranes via thermally induced phase separation (TIPS)[J].Polymer,2016,97:515.
[14] RAMASWAMY S,GREENBERG A R,KRANTZ W B.Fabrication of poly (ECTFE) membranes via thermally induced phase separation[J].Journal of Membrane Science,2002,210(1):175.
[15] PAN J,XIAO C,HUANG Q,et al.ECTFE porous membranes with conveniently controlled microstructures for vacuum membrane distillation[J].Journal of Materials Chemistry A,2015,3(46):23549.
[16] SIMONE S,FIGOLI A,SANTORO S,et al.Preparation and characterization of ECTFE solvent resistant membranes and their application in pervaporation of toluene/water mixtures[J].Separation & Purification Technology,2012,90:147.
[17] 周波,林亚凯,马文中,等.热致相分离法制备乙烯-三氟氯乙烯共聚物微孔膜及影响因素[J].高等学校化学学报,2012,33(11):2585.
[18] CUI Z,HASSANKIADEH N T,LEE S Y,et al.Poly(vinylidene fluoride) membrane preparation with an environmental diluent via thermally induced phase separation[J].Journal of Membrane Science,2013,444(1):223.
[19] HANSEN C M.Hansen solubility parameters[M].New York :Springer,2007.
[20] KHAYET M.,MATSUURA T.Membrane distillation :principles and applications[M].[S.l.]:Elsevier,2011.
[2] LOGAN B E,ELIMELECH M.Membrane-based processes for sustainable power generation using water[J].Nature,2012,488:313.
[3] 陈阳,张玉亭,张春,等.中空纤维SAPO-34分子筛膜的制备及渗透汽化性能[J].南京工业大学学报(自然科学版),2018,42(1):46.
[4] 范苏,邱鸣慧,周邢,等.多通道TiO2超滤膜的制备及其在印染废水中的应用[J].南京工业大学学报(自然科学版),2011,33(1):44.
[5] 杨健,王晓琳,田丰,等.热致相分离法制聚偏氟乙烯微孔膜稀释剂的选择[J].高等学校化学学报,2008,29(9):1895.
[6] TANG Y,LIN Y,MA W,et al.Preparation of microporous PVDF membrane via tips method using binary diluent of DPK and PG[J].Journal of Applied Polymer Science,2010,118(6):3518.
[7] 林亚凯,唐元晖,马恒宇,等.热致相分离法制备聚偏氟乙烯微孔膜[J].膜科学与技术,2009,29(6):36.
[8] ARGASINSKI J K,LOOSBERGH M E.Case history long-term performance of a fluoropolymerlined process vessel[J].Materials Performance,2009,48(10):28.
[9] MILLER W A.How to choose a fluoropolymer[J].Chemical Engineering Science,1993,100(4):163.
[10] CLARK M A.Fluoropolymer linings:the low-cost advat-age[J].Chemical Engineering Science,1992,99(8):106.
[11] ROH I J,RAMASWAMY S,KRANTZ W B,et al.Poly(ethylene chlorotrifluoroethylene) membrane formation via thermally induced phase separation (TIPS)[J].Journal of Membrane Science,2010,362(1):211.
[12] DRIOLI E,SANTORO S,SIMONE S,et al.ECTFE membrane preparation for recovery of humidified gas streams using membrane condenser[J].Reactive & Functional Polymers,2014,79(6):1.
[13] KARKHANECHI H,RAJABZADEH S,NICOLO E D,et al.Preparation and characterization of ECTFE hollow fiber membranes via thermally induced phase separation (TIPS)[J].Polymer,2016,97:515.
[14] RAMASWAMY S,GREENBERG A R,KRANTZ W B.Fabrication of poly (ECTFE) membranes via thermally induced phase separation[J].Journal of Membrane Science,2002,210(1):175.
[15] PAN J,XIAO C,HUANG Q,et al.ECTFE porous membranes with conveniently controlled microstructures for vacuum membrane distillation[J].Journal of Materials Chemistry A,2015,3(46):23549.
[16] SIMONE S,FIGOLI A,SANTORO S,et al.Preparation and characterization of ECTFE solvent resistant membranes and their application in pervaporation of toluene/water mixtures[J].Separation & Purification Technology,2012,90:147.
[17] 周波,林亚凯,马文中,等.热致相分离法制备乙烯-三氟氯乙烯共聚物微孔膜及影响因素[J].高等学校化学学报,2012,33(11):2585.
[18] CUI Z,HASSANKIADEH N T,LEE S Y,et al.Poly(vinylidene fluoride) membrane preparation with an environmental diluent via thermally induced phase separation[J].Journal of Membrane Science,2013,444(1):223.
[19] HANSEN C M.Hansen solubility parameters[M].New York :Springer,2007.
[20] KHAYET M.,MATSUURA T.Membrane distillation :principles and applications[M].[S.l.]:Elsevier,2011.