Pebax/[Bmim][PF6]共混膜的制备及性能研究
作者:邱永涛12,任吉中1, ,赵丹1,李晖1,花开胜1,王颖1,黄雪飞3,邓麦村1
单位: 1. 洁净能源国家实验室, 大连化学物理研究所, 大连 116023; 2. 中国科学院大学, 北京 100049; 3.合肥江航飞机装备有限公司, 合肥 230051
关键词: Pebax;共混膜;离子液体
出版年,卷(期):页码: 2016,36(5):9-15

摘要:
 选用聚醚共聚酰胺(Pebax1657)和1-丁基-3-甲基咪唑六氟磷酸盐([Bmim][PF6])为膜材料,以1-丁醇为溶剂,通过流延成膜法制备Pebax1657/[Bmim][PF6]共混膜. FTIR和XRD分析结果表明: [Bmim][PF6]的引入,破坏了Pebax1657链段间原有的氢键,造成共混膜结晶度降低;而随着[Bmim][PF6]质量分数的增加, N2、CH4、H2和CO2渗透系数逐渐降低.温度、压力和[Bmim][PF6]的含量对Pebax1657/[Bmim][PF6]共混膜中N2、CH4、H2和CO2渗透性能的影响表明:随着操作压差变化, CO2和非极性气体的渗透系数呈现不同的变化趋势; N2、CH4、H2和CO2的渗透系数都随着温度的升高而增大,且它们的渗透活化能随着[Bmim][PF6]含量的增加呈增加趋势.
 In this paper, Pebax1657/1-butyl-3-methylimidazolium hexafluorophosphate ([Bmim][PF6]) blend membranes with different content of [Bmim][PF6] were prepared via solution casting and solvent evaporation method. Physical properties of blend membranes were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD). Results indicated that the hydrogen bond was destroyed, and the crystallization ability decreased. The effect of [Bmim][PF6] content, operating temperature and pressure on the gas (N2, CH4, H2 and CO2) permeabilities was evaluated. With the increase of [Bmim][PF6] content, the permeabilities of N2, CH4, H2 and CO2 decreased. The effect of pressure on the CO2 and non-polar gas permeabilities was different. With the increase of temperature, the permeabilities of N2, CH4, H2 and CO2 increased, similarly, the apparent activation energies of N2, CH4, H2 and CO2 increased.

参考文献:
[1] Riahi K, Rubin E S and Schrattenholzer L. Prospects for carbon capture and sequestration technologies assuming their technological learning[J]. Energy, 2004, 29(9-10): 1309-1318
[2] Mimura T, Simayoshi H, Suda T, et al. Development of energy saving technology for flue gas carbon dioxide recovery in power plant by chemical absorption method and steam system[J]. Energy Convers Manage, 1997, 38(S57-S62)
[3] Gomes V G and Yee K W K. Pressure swing adsorption for carbon dioxide sequestration from exhaust gases[J]. Sep Purif Technol, 2002, 28(2): 161-171
[4] Reijerkerk S R, Knoef M H, Nijmeijer K, et al. Poly(ethylene glycol) and poly(dimethyl siloxane): Combining their advantages into efficient CO2 gas separation membranes[J]. J Membr Sci, 2010, 352(1-2): 126-135
[5] Baker R W. Future directions of membrane gas separation technology[J]. Ind Eng Chem Res, 2002, 41(6): 1393-1411
[6] Neubauer K, Dragomirova R, Stöhr M, et al. Combination of membrane separation and gas condensation for advanced natural gas conditioning[J]. J Membr Sci, 2014, 453(0): 100-107
[7] Li Y and Chung T S. Exploratory development of dual-layer carbon-zeolite nanocomposite hollow fiber membranes with high performance for oxygen enrichment and natural gas separation[J]. Microporous Mesoporous Mater, 2008, 113(1-3): 315-324
[8] Hosseini S S, Teoh M M and Chung T S. Hydrogen separation and purification in membranes of miscible polymer blends with interpenetration networks[J]. Polymer, 2008, 49(6): 1594-1603
[9] 王志, 袁芳. 分离CO2膜技术[J]. 膜科学与技术, 2011, 03(11-17)
[10] Robeson L M. The upper bound revisited[J]. J Membr Sci, 2008, 320(1-2): 390-400
[11] Xiao Y C and Chung T S. Grafting thermally labile molecules on cross-linkable polyimide to design membrane materials for natural gas purification and CO2 capture[J]. Energy Environ Sci, 2011, 4(1): 201-208
[12] Liu Y, Wang R and Chung T S. Chemical cross-linking modification of polyimide membranes for gas separation[J]. J Membr Sci, 2001, 189(2): 231-239
[13] Car A, Stropnik C, Yave W, et al. PEG modified poly(amide-b-ethylene oxide) membranes for CO2 separation[J]. J Membr Sci, 2008, 307(1): 88-95
[14] Lin H Q and Freeman B D. Materials selection guidelines for membranes that remove CO2 from gas mixtures[J]. J Mol Struct, 2005, 739(1): 57-74
[15] 冯世超, 任吉中, 任晓灵, 等.聚醚共聚酰胺_聚乙二醇共混膜的制备及其气体渗透性能的研究[J]. 膜科学与技术, 2012, 05(27-33)
[16] Blanchard L A, Hancu D, Beckman E J, et al. Green processing using ionic liquids and CO2[J]. Nature, 1999, 399(6731): 28-29
[17] Jansen J C, Friess K, Clarizia G, et al. High Ionic Liquid Content Polymeric Gel Membranes: Preparation and Performance[J]. Macromolecules, 2011, 44(1): 39-45
[18] Rabiee H, Soltanieh M, Mousavi S A, et al. Improvement in CO2/H2 separation by fabrication of poly(ether-b-amide6)/glycerol triacetate gel membranes[J]. J Membr Sci, 2014, 469(43-58
[19] Murali R S, Sridhar S, Sankarshana T, et al. Gas Permeation Behavior of Pebax1657 Nanocomposite Membrane Incorporated with Multiwalled Carbon Nanotubes[J]. Ind Eng Chem Res, 2010, 49(14): 6530-6538
[20] Liu Y, Yu S N, Wu H, et al. High permeability hydrogel membranes of chitosan/poly ether-block-amide blends for CO2 separation[J]. J Membr Sci, 2014, 469(198-208)
[21] Kim K H, Ingole P G, Kim J H, et al. Separation performance of PEBAX/PEI hollow fiber composite membrane for SO2/CO2/N2 mixed gas[J]. Chem Eng J, 2013, 233(242-250)
[22] Leng C J, Wei J H, Liu Z Y, et al. Influence of imidazolium-based ionic liquids on the performance of polyaniline-CoFe2O4 nanocomposites[J]. J Alloys Compd, 2011, 509(6): 3052-3056
[23] Feng S C, Ren J Z, Li Z S, et al. Poly(amide-12-b-ethylene oxide) / glycerol triacetate blend membranes for CO2 separation[J]. International Journal of Greenhouse Gas Control, 2013, 19(41-48)
[24] Sridhar S, Aminabhavi T M, Mayor S J, et al. Permeation of carbon dioxide and methane gases through novel silver-incorporated thin film composite Pebax membranes[J]. Ind Eng Chem Res, 2007, 46(24): 8144-8151
[25] Bai Y, Wu G, Zhang Q, et al. Effect of the ionic liquid [bmim]PF6 on the nonisothermal crystallization kinetics behavior of poly(ether-b-amide)[J]. J Appl Polym Sci, 2015, 132(25)
[26] Scovazzo P, Kieft J, Finan D, et al. Gas separations using non-hexafluorophosphate [PF6]− anion supported ionic liquid membranes[J]. J Membr Sci, 2004, 238(1-2): 57-63
[27] Merkel T, Bondar V, Nagai K, et al. Gas sorption, diffusion, and permeation in poly (dimethylsiloxane)[J]. J Polym Sci, Part B: Polym Phys, 2000, 38(3): 415-434
 
 

服务与反馈:
文章下载】【加入收藏

《膜科学与技术》编辑部 地址:北京市朝阳区北三环东路19号蓝星大厦 邮政编码:100029 电话:010-64426130/64433466 传真:010-80485372邮箱:mkxyjs@163.com

京公网安备11011302000819号