Citation: Hong Ye, Ji-ding Li, Yang-zheng Lin, Jian Chen, Cui-xian Chen. PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE[J]. Chinese Journal of Polymer Science, ;2008, 26(6): 705-712. shu

PERVAPORATION SEPARATION FOR TOLUENE/n-HEPTANE MIXTURE BY POLYIMIDE MEMBRANES CONTAINING FLUORINE

Received Date: 3 September 2007
Revised Date: 30 October 2007

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#61602;-(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#61616;C were 1.08, 0.96, 1.77 and 0.10 kg#8226;μm/(m2#8226;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.
1. [1]
  Qian Wang , Yeping Bian , Gagan Dhawan , Wei Zhang , Alexander E. Sorochinsky , Ata Makarem , Vadim A. Soloshonok , Jianlin Han . FDA approved fluorine-containing drugs in 2023. Chinese Chemical Letters, 2024, 35(11): 109780-. doi: 10.1016/j.cclet.2024.109780
2. [2]
  Jingwen Zhao , Jianpu Tang , Zhen Cui , Limin Liu , Dayong Yang , Chi Yao . A DNA micro-complex containing polyaptamer for exosome separation and wound healing. Chinese Chemical Letters, 2024, 35(9): 109303-. doi: 10.1016/j.cclet.2023.109303
3. [3]
  Long TANG , Yaxin BIAN , Luyuan CHEN , Xiangyang HOU , Xiao WANG , Jijiang WANG . Syntheses, structures, and properties of three coordination polymers based on 5-ethylpyridine-2,3-dicarboxylic acid and N-containing ligands. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1975-1985. doi: 10.11862/CJIC.20240180
4. [4]
  Xin Jiang , Han Jiang , Yimin Tang , Huizhu Zhang , Libin Yang , Xiuwen Wang , Bing Zhao . g-C₃N₄/TiO_2-X heterojunction with high-efficiency carrier separation and multiple charge transfer paths for ultrasensitive SERS sensing. Chinese Chemical Letters, 2024, 35(10): 109415-. doi: 10.1016/j.cclet.2023.109415
5. [5]
  Guangyao Wang , Zhitong Xu , Ye Qi , Yueguang Fang , Guiling Ning , Junwei Ye . Electrospun nanofibrous membranes with antimicrobial activity for air filtration. Chinese Chemical Letters, 2024, 35(10): 109503-. doi: 10.1016/j.cclet.2024.109503
6. [6]
  Wei Sun , Anjing Liao , Li Lei , Xu Tang , Ya Wang , Jian Wu . Research progress on piperidine-containing compounds as agrochemicals. Chinese Chemical Letters, 2025, 36(1): 109855-. doi: 10.1016/j.cclet.2024.109855
7. [7]
  Fei ZHOU , Xiaolin JIA . Co₃O₄/TiO₂ composite photocatalyst: Preparation and synergistic degradation performance of toluene. Chinese Journal of Inorganic Chemistry, 2024, 40(11): 2232-2240. doi: 10.11862/CJIC.20240236
8. [8]
  Tianyao He , Gan Li , Xiaoqiang Xie , Dong Han , Yunyue Leng , Qiuli Zhang , Wenming Liu , Guobo Li , Hongxiang Zhang , Shan Huang , Ting Huang , Honggen Peng . Design of highly active meso-zeolite enveloping Pt–Ni bimetallic catalysts for degradation of toluene. Chinese Chemical Letters, 2025, 36(4): 110137-. doi: 10.1016/j.cclet.2024.110137
9. [9]
  Yinglan Yu , Sajid Hussain , Jianping Qi , Lei Luo , Xuemei Zhang . Mechanisms and applications: Cargos transport to basolateral membranes in polarized epithelial cells. Chinese Chemical Letters, 2024, 35(12): 109673-. doi: 10.1016/j.cclet.2024.109673
10. [10]
  Kai Ye , Zhicheng Ye , Chuantao Wang , Zhilai Luo , Cheng Lian , Chunyan Bao . Artificial signal transduction triggered by molecular photoisomerization in lipid membranes. Chinese Chemical Letters, 2025, 36(4): 110033-. doi: 10.1016/j.cclet.2024.110033
11. [11]
  Ke-Ai Zhou , Lian Huang , Xing-Ping Fu , Li-Ling Zhang , Yu-Ling Wang , Qing-Yan Liu . Fluorinated metal-organic framework for methane purification from a ternary CH4/C2H6/C3H8 mixture. Chinese Journal of Structural Chemistry, 2023, 42(11): 100172-100172. doi: 10.1016/j.cjsc.2023.100172
12. [12]
  Boran Cheng , Lei Cao , Chen Li , Fang-Yi Huo , Qian-Fang Meng , Ganglin Tong , Xuan Wu , Lin-Lin Bu , Lang Rao , Shubin Wang . Fluorine-doped carbon quantum dots with deep-red emission for hypochlorite determination and cancer cell imaging. Chinese Chemical Letters, 2024, 35(6): 108969-. doi: 10.1016/j.cclet.2023.108969
13. [13]
  Yu-Yu Tan , Lin-Heng He , Wei-Min He . Copper-mediated assembly of SO₂F group via radical fluorine-atom transfer strategy. Chinese Chemical Letters, 2024, 35(9): 109986-. doi: 10.1016/j.cclet.2024.109986
14. [14]
  Jia-Ru Li , Ning Li , Li-Ling He , Jun He . Fluorine-functionalized zirconium-organic cages for efficient photocatalytic oxidation of thioanisole. Chinese Chemical Letters, 2025, 36(1): 109934-. doi: 10.1016/j.cclet.2024.109934
15. [15]
  Wenhao Wang , Guangpu Zhang , Qiufeng Wang , Fancang Meng , Hongbin Jia , Wei Jiang , Qingmin Ji . Hybrid nanoarchitectonics of TiO₂/aramid nanofiber membranes with softness and durability for photocatalytic dye degradation. Chinese Chemical Letters, 2024, 35(7): 109193-. doi: 10.1016/j.cclet.2023.109193
16. [16]
  Sushu Zhang , Yang Yang , Jingyu Wang . Pyridinic nitrogen-substituted graphene membranes for exceptional CO2 capture. Chinese Journal of Structural Chemistry, 2025, 44(2): 100440-100440. doi: 10.1016/j.cjsc.2024.100440
17. [17]
  Lingling Su , Qunyan Wu , Congzhi Wang , Jianhui Lan , Weiqun Shi . Theoretical design of polyazole based ligands for the separation of Am(Ⅲ)/Eu(Ⅲ). Chinese Chemical Letters, 2024, 35(8): 109402-. doi: 10.1016/j.cclet.2023.109402
18. [18]
  Huangjie Lu , Yingzhe Du , Peng Lin , Jian Lin . Separation of americium from lanthanides based on oxidation state control. Chinese Journal of Structural Chemistry, 2024, 43(10): 100344-100344. doi: 10.1016/j.cjsc.2024.100344
19. [19]
  Hao-Cong Li , Ming Zhang , Qiyan Lv , Kai Sun , Xiao-Lan Chen , Lingbo Qu , Bing Yu . Homogeneous catalysis and heterogeneous separation: Ionic liquids as recyclable photocatalysts for hydroacylation of olefins. Chinese Chemical Letters, 2025, 36(2): 110579-. doi: 10.1016/j.cclet.2024.110579
20. [20]
  Liangji Chen , Zhen Yuan , Fudong Feng , Xin Zhou , Zhile Xiong , Wuji Wei , Hao Zhang , Banglin Chen , Shengchang Xiang , Zhangjing Zhang . A hydrogen-bonded organic framework containing fluorescent carbazole and responsive pyridyl units for sensing organic acids. Chinese Chemical Letters, 2024, 35(9): 109344-. doi: 10.1016/j.cclet.2023.109344

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(599)
HTML views(12)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return