Nanometer porous and super-hydrophobic skeleton strong solid acid material and preparing method thereof

Abstract

The invention provides a nanometer porous and super-hydrophobic skeleton strong solid acid material and a preparing method thereof. The preparing method comprises the following steps: a, polymerizing divinyl benzene under a solvothermal condition, wherein benzoyl peroxide is used as an initiator, polymerizing is carried out at a temperature between 80DEG C and 180DEG C for 12-48h, 7-25mL of corresponding solvent is used each time when 2g of divinyl benzene monomer is used, and the mass ratio of the initiator to the divinyl benzene is 0.015-0.0375; b, adding a solvent to the nanometer porous polydivinyl benzene material which is prepared in the step a, and adding a sulfonating agent to carry out sulfonating, wherein carbon tetrachloride or methylbenzene is used as the solvent, trifluoromethane sulfonic acid or fluorosulfuric acid is used as the sulfonating agent, the volume ratio of the solvent to the sulfonating agent is 10:1, the mass ratio of the PDVB (Polydivinyl Benzene) to the sulfonating agent is (5-10):1, and sulfonating is carried out in a range between 80DEG C and 110DEG C for 12-36h.

Description

technical field [0001] The invention belongs to the technical fields of physical chemistry and material chemistry, and in particular relates to a nanoporous, superhydrophobic solid strong acid material and a preparation method thereof. Background technique [0002] Acid catalysis is a very important type of reaction in the field of catalysis, especially in the fields of petrochemical and fine chemicals. The most important task in the field of acid catalysis is to use efficient solid acids to replace traditional liquid acids, and then to realize products. low-cost, green preparation. Traditional solid acid catalysts include zeolite molecular sieves, sulfurized metal oxides, acid-functionalized mesoporous materials, heteropolyacids, etc., but their disadvantages are: hydrophilic skeleton structure, low specific surface area; zeolite materials are a class of industrial Widely used acid catalysts, but its pore size limitation affects its wider application. [0003] Compared wi...

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Problems solved by technology

Traditional solid acid catalysts include zeolite molecular sieves, sulfurized metal oxides, acid-functionalized mesoporous materials, heteropolyacids, etc., but their disadvantages are: hydrophilic skeleton structure, low specific surface area; zeolite materials are a class of industrial A widely used acid catalyst, but its pore size limitation affects its wider application

[0003] Compared with traditional inorganic framework acid catalysts, organic framework solid acid materials have been more and more widely studied due to their unique hydrophilic and hydrophobic properties, simple and convenient functionalization process, and better catalytic performance. The most representative materials are strongly acidic cation exchange resins such as Amberlyst15, Amberlyst35, etc., but their low specific surface area and weak acid center (H 0 =-2.2), lack of pore structure and poor backbone stability and hydrophobicity affect its wide application

[0004] Usually, the method of synthesizing solid acid catalysts with organic framework is through sulfonation, but the specific surface area of ​​the material after sulfonation is very low, the pore structure is lacking, and the hydrophilicity of the framework is enhanced, which limits its wide application.

And the new sulfonated resin (FDU-14-SO 3 H, etc.) solved the adverse effect of low specific surface area on the catalytic reaction, but the high cost, poor hydrophilicity and stability of the skeleton structure, relatively weak acid strength will limit its wide application

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