On January 6, the Qingdao Institute of Bioenergy and Process of the Chinese Academy of Sciences issued a news report: The membrane separation and catalysis research group led by Jianghe Qing ’s researcher published a summary of relevant research results in the journal of Materials Chemistry, highlighting the use of Solvent volatilization induced self-assembly method was used to synthesize mesoporous alumina and related oxides using block polymers as templates, and the application potential of such mesoporous materials in adsorption, separation and catalysis was analyzed.
Due to the characteristics of large specific surface area and adjustable pore structure, mesoporous nanomaterials have potential applications in energy storage, gas separation, nanocatalysis and other fields. The Membrane Separation and Catalysis Research Group led by Researcher Jiang Heqing focused on the scientific problem of interfacial compatibility control, using functionalized mesoporous polymers as the substrate, using Al metal centers and mesoporous polymerization in metal organic framework compounds (MOF) The coordination between the functional groups on the surface of the substance confines the nano-MOF within the pores of the mesoporous polymer. There is a strong interaction between the defect sites on the surface of this type of MOF and the CO2 molecule, which significantly improves the MOF at low pressure. CO2 adsorption capacity under conditions.
Recently, researchers have tried to introduce such mesoporous materials into polyamide reverse osmosis composite membranes, hoping to further improve the efficiency of seawater desalination. Previous studies have shown that the introduction of carbon nanotubes, mesoporous silica and other nanomaterials in the polyamide membrane can increase the water flux of the composite membrane. Due to the poor interface compatibility between common nanomaterials and polymer matrices, the selectivity of composite membrane separation will be significantly reduced while increasing water flux. In response to this problem, the research team used mesoporous polymers functionalized with amino groups as filler materials, and developed high water flux and high salt rejection by adjusting the microstructure of the interface between the mesoporous polymer and the polyamide matrix. Rate of nanocomposite membranes. Studies have shown that the mesoporous channels of mesoporous polymers serve as a fast water transmission path, which greatly improves the permeability of the composite membrane. At a pressure of 16 bar, the water flux reaches 55L / m2h; in addition, its functional groups and polyamide The good interaction between the chains increases the interface compatibility between the two, effectively improves the separation performance of the composite membrane, and the rejection rate of NaCl reaches 98.7%.