QQ客服 官方微博 反馈留言

	PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE
	Li JD(李继定) ; Hong Ye
	2010-05-13 ; 2010-05-13
关键词	Polyimide Membrane Pervaporation Toluene. TQ202
其他题名	PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE
中文摘要	<正>Five kinds of polyimides were synthesized using five dianhydrides (including 2,2-bis[4-(3,4-dicarboxyphenoxy)- phenyl] propane dianhydride (BPADA),3,3',4,4'-diphenylsulfone-tetracarboxylic dianhydride (DSDA),4,4'- (hexafluoroisopropylidene)-diphthalic anhydride (6FDA),1,4-bis(3,4-dicarboxyphenoxy) benzene dianhydride (HQDPA), and 4,4'-oxydiphthlic dianhydride (ODPA)) and 2,2-bis[4-(4-aminophenoxy)phenyl] hexafluoropropane (BDAF) via the two- step method that included polyaddition to form the polyamic acid and subsequent chemical imidization at ambient temperature.The structures of polyimides were characterized by FTIR and NMR.The thermal properties were characterized by DSC and TGA.All five kinds of polyimides showed good thermal properties and solubility in organic solvents such as DMF,DMAc,NMP and THF at room temperature.The pervaporation (PV) experiments of polyimides for toluene/n-heptane mixture were carried out,and all the polyimides showed selective permeation towards toluene.The fluxes of 6FDA-BDAF, DSDA-BDAF,HQDPA-BDAF and ODPA-BDAF at 80℃were 1.08,0.96,1.77 and O.i0 kg·μm/(m~2·h),and the separation factors were 5.44,1.64,1.28 and 11.44,respectively.The increasing feed temperature resulted in higher flux and lower separation factor of the 6FDA-BDAF membrane.; Five kinds of polyimides were synthesized using five dianhydrides (including 2,2-bis[4-(3,4-dicarboxyphenoxy)- phenyl] propane dianhydride (BPADA),3,3',4,4'-diphenylsulfone-tetracarboxylic dianhydride (DSDA),4,4'- (hexafluoroisopropylidene)-diphthalic anhydride (6FDA),1,4-bis(3,4-dicarboxyphenoxy) benzene dianhydride (HQDPA), and 4,4'-oxydiphthlic dianhydride (ODPA)) and 2,2-bis[4-(4-aminophenoxy)phenyl] hexafluoropropane (BDAF) via the two- step method that included polyaddition to form the polyamic acid and subsequent chemical imidization at ambient temperature.The structures of polyimides were characterized by FTIR and NMR.The thermal properties were characterized by DSC and TGA.All five kinds of polyimides showed good thermal properties and solubility in organic solvents such as DMF,DMAc,NMP and THF at room temperature.The pervaporation (PV) experiments of polyimides for toluene/n-heptane mixture were carried out,and all the polyimides showed selective permeation towards toluene.The fluxes of 6FDA-BDAF, DSDA-BDAF,HQDPA-BDAF and ODPA-BDAF at 80℃were 1.08,0.96,1.77 and O.i0 kg·μm/(m~2·h),and the separation factors were 5.44,1.64,1.28 and 11.44,respectively.The increasing feed temperature resulted in higher flux and lower separation factor of the 6FDA-BDAF membrane.
语种	英语 ; 英语
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/30181]
专题	清华大学
推荐引用方式 GB/T 7714	Li JD,Hong Ye. PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE[J],2010, 2010.
APA	李继定,&Hong Ye.(2010).PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE..
MLA	李继定,et al."PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。