HC Plastics News: Tianjin University announced on November 20 that the team of Professor Wang Zhi from the School of Chemical Engineering of the school and its collaborators realized the large-area preparation of ultra-thin porous membrane for the first time, opening up a new field for gas separation technology. Separation and capture of carbon dioxide is important for mitigating greenhouse gas emissions during production. In terms of carbon capture, MOFs materials that shine in gas separation are not very suitable. The important reason is that most of the carbon separation and capture processes involve the influence of moisture, and the structure of MOFs is not very stable under wet conditions. And in the preparation of the filter membrane, the MOFs material is generally applied to the polymer film to form a "mixed phase" film. However, due to the lack of chemical bridging between the MOFs and the film, the actual filter film will have many defects and agglomeration of the MOFs, resulting in a lack of performance of the filter film. On the afternoon of November 19th, London time, the research results were published online in Nature·Materials. It was first discovered that metal-induced methods can be used to synthesize ordered microporous membranes for efficient CO2/N2 separation. The researchers used metal ions (Cu2+Zn2+), organic coupling molecules and short-chain polymer as structural units to successfully construct metal-induced ordered microporous polymers (MMPs) with ordered microporous structure. MMPs can be applied to commercial films with good mechanical stability. Moreover, since CO2 and the polymer unit therein have a good affinity, it is able to penetrate the film; and the nitrogen having poor affinity is blocked, thereby achieving gas separation. It is reported that Professor Wang Zhi's team has long been committed to the research of CO2 separation membrane technology. In order to break through the performance bottleneck of CO2 separation membrane, high-performance membrane materials were designed and prepared from the aspects of comprehensive control membrane structure, combined with multiple selection mechanisms, construction of CO2 high-speed transmission channels and construction of high-efficiency bionic structures. Successfully developed a variety of new CO2 separation membrane materials with separation performance in the world advanced or even leading level. On this basis, the system developed a large-scale preparation technology for membrane materials, membranes and membrane modules. Editor in charge: Yao Chunlin
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