Nanjing Tech University

Nanjing University of Technology

Jiangsu Jiumo High-tech Co., Ltd.

Wanqin Jin

Gongping Liu

Yang Pan

Guozhen Liu

Weihong Xing

Nanping Xu

Xiaobin Ding

Zhengkun Liu

Jiangying Liu

Haipeng Zhu

Guining Chen

Renhao Li

Long Cheng

Wang Wei

Fei Tao

Haoli Zhou

Mingming Cao

Jiawei Zhu

Yu Liu

Zhenyu Chu

The present disclosure provides a method for predicting a lattice defect in a metal-organic framework (MOF) membrane. The method comprises acquiring a number n of a ligand during preparation of the MOF membrane, and acquiring a theoretical number m of connections formed between a core secondary building unit and a surrounding secondary building unit; setting a number of collisions of the ligand with the core secondary building unit and the surrounding secondary building unit; and calculating an expected value of a number of connections formed on lattices based on a collision probability, wherein the number of collisions is 1 or 2.

Method for predicting lattice defect in metal-organic framework membrane

The present disclosure relates to a phenyl-modified polydimethylsiloxane (PDMS) separation membrane, a fabrication method thereof, and a use thereof in the separation of an aromatic compound, and belongs to the technical field of separation membrane materials. A phenyl-modified PDMS separation membrane comprising a substrate layer and a selective layer is provided.

Phenyl-modified polydimethylsiloxane (PDMS) separation membrane, fabrication method thereof, and use thereof in separation of aromatic compound

The present disclosure provides an acryloyloxy-terminated polydimethylsiloxane (AC-PDMS)-based thin-film composite (TFC) membrane, and a preparation method and use thereof. In the preparation method, a simple ultraviolet (UV)-induced monomer polymerization strategy based on high UV reactivity among acryloyloxy groups is adopted to prepare the AC-PDMS-based TFC membrane. The high UV reactivity among AC-PDMS monomers can induce the rapid curing of a casting solution to enable the formation of an ultra-thin selective layer and the inhibition of pore penetration for a substrate. By optimizing a UV wavelength, an irradiation time, and a polymer concentration, the prepared AC-PDMS-based TFC membrane has a COpenetration rate of 9,635 GPU and a CO/Nselectivity of 11.5. The UV-induced monomer polymerization strategy based on material properties provides a novel efficient strategy for preparing an ultra-thin PDMS-based membrane, which can be used for molecular separation.

Acryloyloxy-terminated polydimethylsiloxane (AC-PDMS)-based thin-film composite (TFC) membrane, and preparation method and use thereof

The present disclosure relates to a polyether block polyamide/polydimethylsiloxane (PDMS) composite membrane for gas separation, and a preparation method and use thereof, and belongs to the technical field of membrane separation. In the present disclosure, an amphoteric copolymer PDMS-polyethylene oxide (PEO) (PDMS-b-PEO) is introduced into an intermediate layer to adjust the interfacial binding performance, thereby promoting preparation of an ultra-thin polyether block polyamide composite membrane. Studies have shown that the surface enrichment of PEO segments not only inhibits a dense SiOlayer formed due to a plasma treatment of a PDMS intermediate layer, but also provides additional hydrophilic sites and interfacial compatibility for the subsequent selective layer. The use of PDMS-b-PEO in an intermediate layer allows the successful preparation of a selective layer with a thickness of about 50 nm.

Polyether block polyamide/polydimethylsiloxane composite membrane for gas separation, and preparation method and use thereof

M(SiF)(pyz)(M=Cu, Zn, Co, or Ni) has a pore size between a size of Hand a size of CO, and thus exhibits prominent screening performance for H/CO. A strong interaction between Cu(SiF)(bpy)and a COmolecule can hinder the transport of the COmolecule. The above two MOFs both can achieve the H/COseparation. By preparing a dense MSiF/polymer layer, MSiFis uniformly dispersed in the polymer and is fixed, and subsequently, MSiFis converted into M(SiF)(pyz)or Cu(SiF)(bpy)by interacting with an organic ligand. Through vapor-induced in-situ conversion, MOF particles can be well dispersed without interface defects between the MOF particles and the polymer. Even at a doping amount of 80%, the mechanical flexibility and stability of the MMM can still be retained.

Mixed matrix membrane (MMM) and method of H/COgas separation by using MMM

The present disclosure relates to a mixed matrix carbon molecular sieve (CMS) membrane, a preparation method of the mixed matrix CMS membrane, and use of the mixed matrix CMS membrane in CH/CHseparation, and belongs to the technical field of membrane separation. The present disclosure solves the problem that the CMS materials in the prior art exhibit low selectivity and low flux during an ethylene/ethane separation process. In this patent, CNis used as a filling particle to prepare a mixed matrix membrane (MMM), and the MMM is pyrolyzed to prepare a CMS membrane. The CN/6FDA-DAM MMM has prominent Cseparation performance.

Mixed matrix carbon molecular sieve (CMS) membrane and use of mixed matrix CMS membrane in CH/CHseparation

The invention relates to a method for preparing a composite metal oxide hollow fibre. A certain stoichiometry of composite metal oxide raw material and a polymer binding agent are added to an organic solvent, and mixed mechanically to obtain an evenly dispersed spinning solution having a suitable viscosity. After defoaming treatment, the spinning solution is extruded through a spinneret and, after undergoing a certain dry spinning process, enters an external coagulation bath; during this period, a phase inversion process occurs and composite metal oxide hollow fibre blanks are formed. The blanks are immersed in the external coagulation bath and the organic solvent is displaced; after natural drying, the blanks undergo a heat treatment process; during this period, polymer burn off, in situ reaction, and in situ sintering processes occur to obtain the composite metal oxide hollow fibre.

Method for preparing composite metal oxide hollow fibre

The present invention discloses an integrated new technique and apparatus for recycling volatile organic compounds of coating printing. The new technique collects a mixed gas of volatile organic compounds produced in the process of coating and drying of a coating machine with a volatiles collecting hood of coating machine, compresses and lead the mixed gas of volatile organic compounds into a condensation system for condensation; the obtained condensate enters a gas-liquid separator to obtain a coating solvent with high concentration; non-condensable lean gas enters a membrane separation and enrichment system to obtain a mixed gas of high concentration organic compounds after membrane separation and enrichment with a complete set of membrane assembly, and then returns to front of the condensation system to repeat the integrated technique. The separation membrane as claimed in the present invention has an extremely high permselectivity for volatile organic compounds of coating printing and can quickly enrich the volatile organic compounds. Recycling rate of volatile organic compounds of the apparatus may reach 90%, and the content of organic compounds in the tail gas emission after treatment is no more than 1 g/m. This integrated new technique largely reduces the production cost of coating printing industry and at the same time protects the atmospheric environment.

Technique and apparatus for recycling volatile organic compounds of coating printing

The Invention discloses a preparation method for a triptyl polymer separation membrane, wherein, it comprises the following steps: take triptycene compound containing active group, dichloride compound and diamino compound containing ether bond as monomers, and conduct polymerization in aprotic organic solvent in the presence of acid-binding agent; pour the obtained polymer solution into deionized water for precipitation after the reaction, filter out precipitates and wash with methanol and dry to get triptyl polymer; dissolve the triptyl polymer in aprotic organic solvent to produce a membrane-casting solution, apply the solution on support and dry to get a triptyl polymer separation membrane. The Invention solves the problem that the reticular polymer material is insoluble, and breaks the restriction for application of such material in separation membrane due to its insoluble and aging features.

Preparation method for triptyl polymer separation membrane

A method for preparing organic-inorganic composite materials is provided. It is a dispersion method that the inorganic phase is introduced into the polymer matrix uniformly. The core-shell structure, in which the inorganic materials are core and the organic materials are shell, is formed by first wrapping the inorganic materials with the organic materials in the same reactor. Therefore, the match between the polarity of inorganic phase and the polarity of polymer phase is increased.

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Nanjing, China

Wanqin Jin