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公开(公告)号：US20210202972A1
公开(公告)日：2021-07-01
申请号：US17269835
申请日：2020-03-19
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xuemei WU , Gaohong HE , Xiaozhou WANG , Xiaoming YAN , Tiantian LI , Wanting CHEN , Xiangcun LI , Wu XIAO , Xiaobin JIANG , Fujun CUI , Yan DAI , Xuehua RUAN
IPC: H01M8/1072 , C08G73/18 , H01M8/1067
Abstract: The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.
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公开(公告)号：US20240124336A1
公开(公告)日：2024-04-18
申请号：US18043670
申请日：2022-08-08
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xuehua RUAN , Xiaobin JIANG , Gaohong HE , Xiaoming YAN , Wanting CHEN , Xuemei WU , Yan DAI , Tiantian LI , Miao YU
CPC classification number: C02F1/4693 , C02F1/42 , C02F2101/10
Abstract: The present invention provides a high-efficient magnesium ion removal system for salt lake brine based on in situ alkali production using bipolar membrane electrochemical process, it is constructed with cathode, cathode cell, anode, anode cell, and anion exchange membranes, bipolar membranes, acid cells, alkali cells, mesh materials for precipitate aggregation, acid-washing cells. During the working stage, salt lake brine enters the alkali cell, in which magnesium ions react with hydroxide groups and generate precipitate in mesh materials for precipitate aggregation, meanwhile magnesium-removed salt lake brine is produced; pure water enters acid cell, in which hydrochloric acid is produced and then exported to acid-washing cell; the mesh materials for precipitate aggregation, after they are packed with magnesium hydroxide particles, would be periodically transferred into acid-washing cell, in which magnesium hydroxide would react with hydrochloric acid and generate magnesium chloride solution, and the mesh materials are recycled after regeneration for precipitate aggregation.
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Patent Agency Ranking
公开(公告)号：US20230256396A1
公开(公告)日：2023-08-17
申请号：US18030684
申请日：2021-03-04
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Jianhua YANG , Linzhe LI , Ying LU , Gaohong HE , Jinming LU , Yan ZHANG
CPC classification number: B01D67/0048 , B01D71/0281 , B01D67/0051
Abstract: In a method for preparing a zeolite CHA membrane, a gel conversion method is adopted to assist crystallization, seed solutions with different concentrations and sizes are successively coated on the surface of a porous support to obtain a seed layer, a synthetic gel is coated on the seed layer to obtain a gel layer, and then the porous support is subjected to a membrane crystallization reaction to obtain a zeolite CHA membrane. The method skips the conventional stage of converting the heterogeneous zeolite into the zeolite CHA seed, and directly takes a heterogeneous zeolite with the same secondary structural unit as that of zeolite CHA as a seed to directly prepare a zeolite CHA membrane on a support.
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4.发明申请公开(公告)号：US20190177570A1
公开(公告)日：2019-06-13
申请号：US16323452
申请日：2017-12-11
Applicant: Dalian University of Technology
Inventor： Xuehua RUAN , Gaohong HE , Xuxing LIAO , Yan XU , Xiaoming YAN , Yan DAI , Ning ZHANG
IPC: C09D165/00 , C08G61/12
Abstract: The present invention provides a surface modification method based on the polymerization and cross-linking solidification of dopamine and/or its derivatives, which belongs to the technical field about composite material fabrication. The principle of dopamine polymerization and the formation process of polydopamine coating layer are the foundation of the present invention. This innovative method is established after deeply analyzing the failure mechanism of polydopamine coating layer in severe environments, such as organic solvents and acidic/alkalic environments. The critical work is finding out an eligible cross-linking agent which could react with the active functional groups in polydopamine. After cross-linking reaction, the soluble low-molecular-weight dopamine oligomers could be transformed into the insoluble three-dimensional stereographic networks. In this instance, the interaction between polydopamine molecules, and the adhesion between polydopamine coating layer and substrate materials, can be significantly strengthened. After the cross-linking solidification, the hydrophilic polydopamine coating layer could be stable and effective for long-term utilization in severe environments, e.g., organic solvents and acidic/alkalic environments, and thereby expand the application scope of the surface modification method based on dopamine polymerization greatly.
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公开(公告)号：US20250091015A1
公开(公告)日：2025-03-20
申请号：US18570497
申请日：2023-05-29
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xuehua RUAN , Gaohong HE , Weixiang FAN , Jiaming WANG , Wenji ZHENG , Xiaobin JIANG , Xiaoming YAN , Wu XIAO , Qinzheng HE
Abstract: A large-scale fabrication technique for PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol for gas separation. Based on the membrane fabrication technique of dry/wet phase inversion, firstly, the coagulation process of casting solution is regulated by low-molecular-weight polyethylene glycol to thin the dense functional layer, to improve the hydrophilicity of the membrane structure, and to form mass transfer channels for the diffusion of polyethylene glycol into the dense functional layer. Then, directional migration and enrichment of polyethylene glycol are realized through capillary action induced by directional water evaporation for large-scale fabrication of PIM-1 asymmetric membranes doped with low-molecular-weight polyethylene glycol in the dense functional layer for gas separation, and thereafter high permeation ability and high selectivity are achieved simultaneously.
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公开(公告)号：US20230146223A1
公开(公告)日：2023-05-11
申请号：US17914974
申请日：2021-06-18
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xiaobin JIANG , Peipei LI , Menghang LI , Zhijie YUAN , Gaohong HE , Wu XIAO , Xiangcun LI , Xuemei WU
CPC classification number: C12N15/1006 , B33Y80/00 , B29C64/124
Abstract: The present invention discloses a nucleic acids extraction system and method based on a 3D-printed microdevice, and belongs to the technical field of nucleic acids extraction. The nucleic acids extraction system is a monomer 3D-printed microdevice or a 3D-printed microdevice prepared by 3D printing technologies, the monomer 3D-printed microdevice comprises a nucleic acids binding region and a handle region, and the 3D-printed microdevice is composed of more than two monomer 3D-printed microdevices through a joining region; and the nucleic acids binding region is made of photosensitive resin or thermoplastic. An extraction method for the nucleic acids extraction system based on a 3D-printed microdevice is used to bind, clean and elute nucleic acids by moving the monomer 3D-printed microdevice or the 3D-printed microdevice among a solution containing target nucleic acids, a washing buffer and an elution buffer.
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公开(公告)号：US20200114277A1
公开(公告)日：2020-04-16
申请号：US16314773
申请日：2017-11-03
Applicant: Dalian University of Technology
Inventor： Xiaobin JIANG , Guannan LI , Gaohong HE , Linghan TUO , Dapeng LU , Wu XIAO , Xiangcun LI , Xuemei WU
IPC: B01D9/00
Abstract: The present invention provides a continuous crystallization method under control of the multistage membrane modules, and belongs to the technical field of crystallization engineering. A crystallization solution is added to a crystallizer, and a stirring apparatus and a temperature control apparatus are started. After the system running stability, the loop of crystallization is started. Meanwhile, the coolant or antisolvent feed liquid loop is also started. The crystallization solution can respectively conduct crystal nucleation, growth and ripening in the multistage membrane modules, and then the crystallization solution is transported into a filter device and a drying apparatus to obtain the final crystal products. The desired crystal products can be obtained by the systematical control of the nucleation and crystal growth through the flow and the temperature of the crystallization solution, coolant or antisolvent feed liquid, and the contact time between two liquid phases.
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