公开(公告)号：US20190177570A1

公开(公告)日：2019-06-13

申请号：US16323452

申请日：2017-12-11

申请人： Dalian University of Technology

发明人： Xuehua RUAN ,  Gaohong HE ,  Xuxing LIAO ,  Yan XU ,  Xiaoming YAN ,  Yan DAI ,  Ning ZHANG

IPC分类号： C09D165/00 ,  C08G61/12

摘要： 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.

公开(公告)号：US20210202972A1

公开(公告)日：2021-07-01

申请号：US17269835

申请日：2020-03-19

申请人： DALIAN UNIVERSITY OF TECHNOLOGY

发明人： 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分类号： H01M8/1072 ,  C08G73/18 ,  H01M8/1067

摘要： 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.

公开(公告)号：US20240124336A1

公开(公告)日：2024-04-18

申请号：US18043670

申请日：2022-08-08

申请人： DALIAN UNIVERSITY OF TECHNOLOGY

发明人： Xuehua RUAN ,  Xiaobin JIANG ,  Gaohong HE ,  Xiaoming YAN ,  Wanting CHEN ,  Xuemei WU ,  Yan DAI ,  Tiantian LI ,  Miao YU

IPC分类号： C02F1/469 ,  C02F1/42

CPC分类号： C02F1/4693 ,  C02F1/42 ,  C02F2101/10

摘要： 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.