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DOI:https://doi.org/10.1016/j.cjche.2018.12.011
PDMS/ZIF-8 coating polymeric hollow fiber substrate for alcohol permselective pervaporation membranes
Li Jie, Ying Labreche, Wang Naixin, Ji Shulan, safety Fu 1
content validity
Pervaporation priority membrane separation technology is widely concerned because it can effectively solve the bottleneck problem of low fermentation yield in fuel ethanol and butanol production. Organic / inorganic hybrid membrane can realize the complementary advantages of organic and inorganic materials, which is considered to be one of the most important development directions in the field of separation membrane in the future. For inorganic materials, metal organic frameworks (MOF) are composed of inorganic metal oxygen clusters and organic ligands. The organic structure of MOF has more advantages than molecular sieves in compatibility with organic polymers. Zif-8, a kind of zeolites with imidazole framework, has strong hydrophobicity and flexible structure, which can be used for the preparation of priority alcohol permeable membrane. The form of priority alcohol permeable membrane module is divided into plate type, roll type and hollow fiber type. Among them, hollow fiber membrane has better industrial application value because of its high loading density and excellent self-supporting structure. In this study, PDMS / zif-8 composite membranes were coated on the hollow fiber substrate to develop the pervaporation priority membranes with high selectivity. Firstly, PDMS and PDMS / zif-8 were used as sharing layer, and hollow fiber TORLON R, PVDF, ultemr and matrimidr with different porosity were used as supporting layer to prepare composite membrane. The effects of different hollow fiber substrates on the membrane properties were studied. The results show that the carriers should have proper porosity and pore size in order to reduce the effect of Knudsen effect on membrane performance. Based on the results, zif-8 was introduced to prepare the separation layer with better selectivity to improve the pervaporation performance. The separation coefficient of PDMS / zif-8 / TORLON r membrane is 8.9, and the total flux is 847g · m-2 · H-1. The hollow fiber PDMS / zif-8 / TORLON r composite membrane has great potential in industrial application.
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Communication author and Team Introduction
Li Jie, assistant researcher, master tutor. In 2015, he graduated from Beijing University of technology with a doctorate in Applied Chemistry. The research focuses on the preparation of application-oriented membrane materials and modules, membrane process design and membrane process control. In the previous study, self-assembly technology was used to prepare hollow fiber polymer multilayer films, which were enlarged into four inch semi industrial modules; roll coating self-assembly technology was used to prepare 2.16 M2 pilot scale membrane module is used for the operation of fermentation liquid purification demonstration project; organic / inorganic nano hybrid membrane is prepared by self-assembly technology and applied to nanofiltration or pervaporation technology for sewage and industrial wastewater treatment, such as organic solvent dehydration, organic solvent recovery in water, water softening, dye desalination and dye removal in water, etc., in the fields of chemical industry, medicine, environmental protection, etc It has a wide application prospect. The results of the above research have been published in Journal of membrane science, AIChE journal, chemical engineering journal and other mainstream journals in the field of chemical industry and membrane separation, with good research basis and broad development potential.
The membrane technology center of Beijing University of technology is one of the early units engaged in the research of chemical materials and separation engineering in China. It is now affiliated to the Department of chemical engineering of the school of environment and energy engineering of Beijing University of technology. At present, it has 5 professors, 1 associate professor, 2 lecturers, more than 30 doctoral and master's degree students. The team members are interdisciplinary, with reasonable age, education background and professional title structure. The overall strength of the research team is strong and has great potential for sustainable development. Since 1975, he has been engaged in membrane material design, membrane module preparation, membrane pollution mechanism research and control, and membrane application engineering research, and has made many innovative achievements in the fields of gas separation membrane, pervaporation membrane, nanofiltration membrane and separation engineering application. The research content has been greatly supported by the Ministry of science and technology of the people's Republic of China, the National Natural Science Foundation of the people's Republic of China and the Beijing Municipal Science and Technology Commission. The membrane technology center has successively undertaken the national 973 project, the National 863 project, the National Natural Science foundation of the people's Republic of China, the Beijing Municipal Natural Science Foundation (one key Fund), the Ministry of education's "new century talent support plan", the Beijing Science and technology new star training plan, and Huo Yingdong's education There are more than 40 vertical and horizontal projects entrusted by the Municipal Education Commission, science and Technology Commission and enterprises. More than 400 papers have been published in academic journals at home and abroad, including more than 100 SCI search papers published in angelw. Chem. Int. ed., AIChE J., J. mater. Chem. A, J. membr. SCI., ACS appl. Mater. Interfaces, chem. Commun., chem. Eng. J. and other international authoritative academic journals, with 4 monographs published and more than 80 Chinese invention patents authorized.
Full text link: https://doi.org/10.1016/j.cjche.2018.12.011
About CJChE
Chinese Journal of Chemical Engineering (cjche), a sister Journal of chemical engineering, is a comprehensive international academic journal jointly published by China Association of science and technology, China Chemical Society and chemical industry press Co., Ltd. and Elsevier. Founded in 1982, it was renamed in 1993 and then re filed. At that time, Chen Jiayong, the pioneer of hydrometallurgy, and Yu guocong, the internationally famous rectification expert, were two academicians, and the Journal of China Chemical Society. Since its inception, it has gone through the development process from semi annual to quarterly, bimonthly and even monthly. At present, it is a monthly magazine, with 16 open pages, and is publicly distributed at home and abroad. Currently, he is the chief editor of academician Fei Weiyang of Tsinghua University and executive editor of Professor Luo Guangsheng.
The purpose of this journal is to promote the academic development and exchange of chemical engineering at home and abroad. Based on the development frontier of chemical engineering in China and even in the world and the major needs of national economy, it mainly publishes original research papers on chemical basic theories, new technologies, new methods, new equipment and new materials, reports basic data with important value and plays a guiding role in discipline development and technological progress Summary and monograph of. The scope of content includes chemical engineering, chemical process, chemical equipment, process development, chemical metallurgy and related high-tech fields such as biology, information, energy, materials, environmental engineering and safety engineering.
Since 1996, the journal has been included by SCI search, EI, Scopus, CA, statistics and analysis of China's scientific papers, China Science Citation Database and other famous retrieval systems and databases at home and abroad, with readers covering more than 100 countries and regions. According to the latest data released by Kerui Wei'an, the impact factor of cjche in 2018 is 1.911, a 12% increase over the previous year. The total cited frequency is 3775, with a 22% increase. The chemical minor disciplines rank 71 / 138, the top 51%, and the sci3 area. According to Scopus database, cjche's three-year impact factor citescore is 2.12, ranking 79 / 272 in the international chemical industry comprehensive field, top 30%, Q2 area. In 2019, the Chinese Academy of Sciences released the latest journal zoning table, and cjche entered zone 3 of Engineering Technology / chemical industry.
In 2019, Chinese Journal of chemical engineering won the title of "China's most internationally influential academic journal" (top 5%) for the eighth consecutive year since it first participated in the evaluation, and was selected into the echelon journal project of China's science and technology journal excellent action plan (only one journal of chemical industry was selected in the National English journal of chemistry, chemical industry and materials).
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