通过在炭膜前驱体中添加纳米二氧化钛-P25粒子制备了P25杂化炭膜,并采用TG、SEM、TEM、XRD、气体渗透性能测试等表征方法探讨添加P25纳米粒子对杂化炭膜的热解过程、微观结构及气体渗透性能的影响.结果表明,P25纳米粒子的加入提高了聚合物膜的热稳定性；P25粒子因团聚形成一定的堆积间隙并与炭基体形成了界面孔隙.气体渗透性能测试表明,P25的引入显著地提高了气体渗透通量,并随添加量增加提高而更加明显,气体选择性略有降低,分离机理仍以分子筛分为主；炭化终温的提高可以显著增加气体选择性,但气体渗透性有所降低.当P25添加量为20wt％,炭化终温为700℃时,所制备的杂化炭膜其H2、CO2、O2、N2、CH4气体渗透性分别为1769.2、1558.6、410.2、55.5和26.8 Barrer.
参考文献
| [1] | Hagg M B,Lie J A,Lindbrathen A.Carbon molecular sieve membranes,a promising alternative for selected industrial applications.Ann.N.Y.Acad.Sci.,2003,984:329-345. |
| [2] | Suda H,Haraya K.Gas Permeation through micropores of carbon molecular sieve membranes derived from kapton polyimide.J.Phys.Chem.B,1997,101(20):3988-3994. |
| [3] | Anshu S G,Koros W J.Air separation properties of flat sheet homogeneous pyrolytic carbon membranes.J.Membr.Sci.,2000,174(2):177-188. |
| [4] | Tin P S,Xiao Y C,Chung T S.Polyimide-carbonized membranes for gas separation:structural,composition,and morphological control of precursors.Sep.& Pur.Re.,2006,35(1):285-318. |
| [5] | Lee L L,Tsai D S.Synthesis and permeation properties of siliconcarbon-based inorganic membrane for gas separation.Ind.Eng.Chem.Res.,2001,40(2):612-616. |
| [6] | Kusakabe K,Yamamoto M,Morooka S.Gas permeation and micropore structure of carbon molecular sieving membranes modified by oxidation.J.Membr.Sci.,1998,149(1):59-67. |
| [7] | LI Lin,WANG Tong-Hua,CAO Yi-Ming,et al.Physica design,preparation and functionalization ofcarbon membranes for gas separation.Journal of Inorganic Materials,2010,25(5):449-456. |
| [8] | WANG Nan,WANG Tong-Hua,LI Lin,et al.Fabrication and gas separation properties of zeolite Y/carbon hybrid membranes.Journal of Chemical Engineering of Chinese Universities,2009,23(1):126-130. |
| [9] | Liu Q L,Wang T H,Qiu J S,et al.A novel carbon/ZSM-5 nanocomposite membrane with high performance for oxygen/nitrogen separation.Chem.Comm.,2006,6(11):1230-1232. |
| [10] | ZHAO Xuan-Ying,WANG Tong-Hua,LI Lin,et al.Polymide/Fe3O4-carbonized membranes for gas separation.Journal of Inorganic Materials,2010,25(1):47-52. |
| [11] | Liu Q L,Wang T H,Guo H C,et al.Controlled synthesis of high performance carbon/zeolite T composite membrane materials for gas separation.Micropor.Mesopor.Mater,2009,120(3):460-466. |
| [12] | 刘庆岭.功能炭膜的设计、制备及其气体分离性能.大连:大连理工大学博士论文,2008. |
| [13] | Lua A C,Su J C.Structural changes and development of transport properties during the conversion of a polyimide membrane to a carbon membrane.J.Appl.Polym.Sci.,2009,113(1):235-242. |
| [14] | WU la-Ying,LI Chang-Jiang.The synthesis of nano-TiO2 powder by Sol-Gel method and the phase transformation.Journal of Inorganic Materials,2002,18(4):399-403. |
| [15] | Steel K M,Koros W J.Investigation of porosity of carbon materials and related effects on gas separation properties.Carbon,2003,41(2):253-266. |
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