王鸿,李琳,王春雷,王同华

• 1:大连理工大学化工学院精细化工国家重点实验室炭素研究室

摘要(Abstract)：

以钢网为支撑体,采用浸渍法制备具有内嵌柔性支撑体结构的聚二甲基硅氧烷(PDMS)复合膜,采用扫描电子显微镜对复合膜的形貌进行分析,探讨了制膜工艺对C_3气体/N_2体系气体渗透性能的影响。研究表明,与PDMS均质膜相比,在保持较高选择性的前提下,内嵌柔性支撑体PDMS复合膜不仅具有较高的气体渗透通量,同时表现出具有良好的柔韧可弯曲性能和机械强度。不同经纬结构的钢网所制备的柔性复合膜的气体渗透性能不同,结构疏松钢网制备的复合膜气体渗透速率较高;PDMS的制备工艺(如单体和交联剂的配比、固化反应时间及浓度)对复合膜的气体分离性能影响较大。在最佳制备工艺条件下,所制备的复合膜对N_2、C_3H_8、C_3H_6气体的渗透速率分别为8、106、178 GPU(1 GPU=10-6 cm3(STP)×cm~(-2)×s~(-1)×(cm Hg)~(-1);C_3H_8/N_2和C_3H_6/N_2的选择性分别为12和21。复合膜对烃类混合气也表现出良好的分离性能,并保持良好的渗透稳定性。

关键词(KeyWords)： PDMS复合膜;内嵌;柔性;渗透

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(21276035,21376037,21436009,21576035,21506020);; 中央高校基本科研业务费专项资金(DUT16RC(4)05)

作者(Author): 王鸿,李琳,王春雷,王同华

参考文献(References)：

• [1]WANG Jian-hong(王建宏),CHEN Jia-qing(陈家庆),CAO Jian-shu(曹建树).Study on hydrocarbon VOCs recovery by composite membrane(硅橡胶复合膜回收烃类VOCs研究)[J].Enviromental Engineering(环境工程),2010,28(S1):424-427.
• [2]Raharjo R D,Freeman B D,Paul D R,et al.Pure and mixed gas CH4 and n-C4H10 permeability and diffusivity in poly(dimethylsiloxane)[J].Journal of Membrane Science,2007,306(1-2):75-92.
• [3]Fang M,Wu C,Yang Z,et al.ZIF-8/PDMS mixed matrix membranes for propane/nitrogen mixture separation:experimental result and permeation model validation[J].Journal of Membrane Science,2015,474:103-113.
• [4]Lue S J,Tsai C L,Lee D,et al.Sorption,diffusion,and perm-selectivity of toluene vapor/nitrogen mixtures through polydimethylsiloxane membranes with two cross-linker densities[J].Journal of Membrane Science,2010,349(1-2):321-332.
• [5]TANG Ming(汤明),XIAO Ze-yi(肖泽仪),SHI Xiao-yan(史晓燕).Application and development of membrane technology in hydrocarbon separation from mixed gas(膜技术在含烃类气体分离中的研究及前景)[J].Filtration and Separation(过滤与分离),2005,15(4):21-23.
• [6]Javaid A.Membranes for solubility-based gas separation applications[J].Chemical Engineering Journal,2005,112(1-3):219-226.
• [7]TIAN Zhi-zhang(田志章),LI Yi-fan(李奕帆),JIANG Zhong-yi(姜忠义),et al.Facilitated transport membranes for biogas upgrading(用于生物气提纯的促进传递膜)[J].Journal of Chemical Industry and Engineering(化工学报),2014,65(5):1594-1601.
• [8]SUN De(孙德),LI Bing-bing(李冰冰),XU Zhen-liang(许振良).Preparation and pervaporation performances of PTFE-PDMS/PVDF composite membranes(PTFE-PDMS/PVDF复合膜制备及其渗透汽化性能)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2013,27(3):500-505.
• [9]CHEN Zhen(陈镇),LIU Jia-qi(刘家祺).Study on the PV mass transfer model of removal of VOCs from water(水中脱除VOC渗透汽化传质模型的研究)[J].Journal of Chemical Engineering of Chinese Universities(高校化学工程学报),2004,18(1):7-12.
• [10]FANG Zhi-ping(方志平),JIANG Zhong-yi(姜忠义).Pervaporation separation of phenol aqueous solution using cyclodextrin polymer-filled PDMS membranes(聚环糊精填充PDMS渗透蒸发膜分离苯酚水溶液)[J].Journal of Chemical Industry and Engineering(化工学报),2006,57(4):843-848.
• [11]HAN Xiao-long(韩小龙),ZHANG Xing-mei(张杏梅),MA Xiao-xun(马晓迅),et al.Pervaporation performance of carbon nanotube filled PDMS membranes(碳纳米管填充PDMS膜的渗透汽化性能)[J].Journal of Chemical Industry and Engineering(化工学报),2014,65(1):271-278.
• [12]Ramaiah K P,Satyasri D,Sridhar S,et al.Removal of hazardous chlorinated VOCs from aqueous solutions using novel ZSM-5loaded PDMS/PVDF composite membrane consisting of three hydrophobic layers[J].Journal of Hazardous Materials,2013,261:362-371.
• [13]XU Guo-qiang(徐国强),YU Jiang(余江),WANG Kang(王康),et al.Preparation of montmorillonite filled PDMS hybrid membrane and its pervaporation on ethanol over water(蒙脱石-聚二甲基硅氧烷复合膜制备及其乙醇/水分离性能)[J].Journal of Chemical Industry and Engineering(化工学报),2007,58(2):391-395.
• [14]Stevens N S M,Rezac M E.Nanoporous organic/inorganic hybrid materials produced from poly(dimethyl siloxane)[J].Polymer,1999,40(15):4289-4298.
• [15]Jannatduost E,Babaluo A A,Abbasi F,et al.Surface modification of nanocomposite ceramic membranes by PDMS for condensable hydrocarbons separation[J].Desalination.2010,250(3):1136-1139.
• [16]Sadrzadeh M,Amirilargani M,Shahidi K,et al.Gas permeation through a synthesized composite PDMS/PES membrane[J].Journal of Membrane Science,2009,342(1-2):236-250
• [17]REN X L,REN J Z,LI h,et al.Permeation characteristics of light hydrocarbons through poly(amide-6-β-ethylene oxide)multilayer composite membranes[J].Chinese Journal of Chemical Engineering,2013,21(3):232-237.
• [18]Merkel T C,Bondar V I,Nagal K,et al.Gas sorption,diffusion,and permeation in poly(dimethylsiloxane)[J].Journal of Polymer Science Part B-Polymer Physics,1999,38:415-434.
• [19]Fang M,Zhang H,Chen J,et al.A facile approach to construct hierarchical dense membranes via polydopamine for enhanced propylene/nitrogen separation[J].Journal of Membrane Science,2016,499:290-300.
• [20]Kim H,Kim H,Kim S,et al.PDMS–silica composite membranes with silane coupling for propylene separation[J].Journal of Membrane Science,2009,344(1-2):211-218.
• [21]Jiang X,Kumar A.Performance of silicone-coated polymeric membrane in separation of hydrocarbons and nitrogen mixtures[J].Journal of Membrane Science,2005,254(1-2):179-188.
• [22]Jiang X,Kumar A.Silicone-coated polymeric membrane for separation of hydrocarbons and nitrogen at sub-ambient temperatures[J].Journal of Membrane Science,2006,286(1-2):285-292.
• [23]Sadrzadeh M,Shahidi K,Mohammadi T.Effect of operating parameters on pure and mixed gas permeation properties of a synthesized composite PDMS/PA membrane[J].Journal of Membrane Science,2009,342:329-340.