Hierarchical pore structure high polymer material and preparation method thereof

A polymer material and multi-level pore technology, applied in the field of multi-level pore structure polymer materials and their preparation, can solve the problems of high material waste rate, high drying energy consumption, surfactant leakage, etc., and achieve high product qualification rate , low drying energy consumption, fast drying effect

A polymer material and multi-level pore technology, applied in the field of multi-level pore structure polymer materials and their preparation, can solve the problems of high material waste rate, high drying energy consumption, surfactant leakage, etc., and achieve high product qualification rate , low drying energy consumption, fast drying effect

CN114479162AActive Publication Date: 2022-05-13SHAANXI NORMAL UNIV
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  • Hierarchical pore structure high polymer material and preparation method thereof
  • Hierarchical pore structure high polymer material and preparation method thereof
  • Hierarchical pore structure high polymer material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 0.40g of hydrophobic silica particles and 0.40g of dibenzoyl peroxide into the beaker, then add 12.86g of p-chlorostyrene, 2.88g of divinylbenzene, 0.58g of trimethylolpropane triacrylate, 2.88 g polylactic acid (molecular weight: 10,000), stir evenly with a PTFE stirrer to form a uniform reaction mixture; add 80 g of deionized water to the mixture, and stir with a dispersion plate for 10 minutes to form a viscous, stable gel emulsion ; Thermally polymerize the gel emulsion in a water bath, react at room temperature for 8 hours, heat up to 70°C for 12 hours; dry at 80°C to obtain a complete appearance, uniform and delicate density of 0.20g / cm 3 Hierarchical porous polymer materials.

Embodiment 2

[0041] Add 0.80g of hydrophobic silica particles and 0.80g of azobisisobutyronitrile into the beaker, then add 25.73g of α-methylstyrene, 5.76g of diallyl phthalate, and 1.16g of trimethylolpropane in sequence Trimethacrylate, 5.76g polyvinyl chloride paste resin (molecular weight is 62,000), and the dispersing plate is stirred evenly to form a uniform reaction mixture; 60g deionized water is added to this mixture, and the emulsifier is stirred for 15 minutes to form Viscous and stable gel emulsion; thermally polymerize the gel emulsion in a water bath, react at room temperature for 8 hours, heat up to 80°C for 12 hours; dry at 80°C to obtain a complete appearance, uniform and delicate density of 0.40g / cm 3 Hierarchical porous polymer materials.

Embodiment 3

[0043] Add 1.20g of hydrophobic silica particles and 1.20g of dicumyl peroxide into the beaker, then add 35.72g of 4-methylstyrene, 8.64g of ethylene glycol dimethacrylate, and 1.73g of cyanuric acid Triallyl ester, 8.84g polyacrylamide (molecular weight is 15,000), the PTFE stirrer stirs evenly, forms the uniform reaction mixture; Adds 40g deionized water to this mixture, emulsifier stirs 20 minutes, forms viscose Thick and stable gel emulsion; thermally polymerize the gel emulsion in a water bath, react at 40°C for 4 hours, heat up to 90°C for 10 hours; dry at 80°C to obtain a complete appearance, uniform and delicate density of 0.60g / cm 3 Hierarchical porous polymer materials.

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Abstract

The invention discloses a hierarchical pore structure high polymer material and a preparation method thereof, and belongs to the field of porous polymer materials. The preparation method comprises the following steps: (1) mixing hydrophobic silicon dioxide particles with an initiator, then adding a polymerizable monomer, a cross-linking agent, an assistant cross-linking agent and a pore-foaming agent, and uniformly stirring to obtain a reaction mixed solution; (2) adding water into the reaction mixed solution, and stirring until a gel emulsion is formed; and (3) performing staged thermal polymerization on the gel emulsion to obtain the hierarchical pore structure high polymer material. According to the invention, the content and size of pores and pore throats in the material can be effectively regulated and controlled, and the high polymer material with the multistage micron pore structure is obtained. The material is good in heat transfer in the polymerization process, free of implosion phenomenon and high in product percent of pass; a wet material obtained by polymerization is rich in pores, small in resistance in a mass transfer process and relatively high in drying rate; meanwhile, the hierarchical pore structure high polymer material disclosed by the invention has excellent machining performance and static load resistance.

Description

technical field [0001] The invention belongs to the field of porous polymer materials, in particular to a polymer material with a hierarchical porous structure and a preparation method thereof. Background technique [0002] Porous materials have the advantages of low relative density, high specific strength, large specific surface area, sound insulation, and heat insulation. The preparation of porous materials has always been a hot spot of concern. [0003] At present, the commonly used preparation methods of porous materials mainly include gas foaming method, solvent porogenic method and template method, etc. Compared with foaming method and solvent porogenation method, template method is favored because of its advantages of easy and precise control of pore size and distribution. Gel emulsions are a common template for preparing low-density porous materials. Gel-emulsions are also called highly concentrated emulsions and high internal-phase ratio emulsions. It has been r...

Claims

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Application Information

Patent Timeline
13 May 2022
Publication
CN114479162A
IPC
C08J9/26; C08L25/18; C08K3/36; C08L25/16; C08L25/08; C08L25/14
CPC
C08J9/26; C08J9/0066; C08J2325/18; C08J2325/16; C08J2325/08; C08J2325/14; C08J2201/026; C08J2205/044
Inventors
房喻; 王佩