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Micron-nano-sized porous composite material and preparation method thereof

A porous composite material, micro-nano technology, applied in the field of micro-nano porous composite material and its preparation, can solve the problems of time-consuming and immature, and achieve the effect of low thermal conductivity and high hydrophobicity

Active Publication Date: 2012-04-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current sol-gel method to prepare silica, carbon and polymer airgel composites often requires supercritical drying conditions or the use of solvent replacement, surface modification, etc. There is no mature method for the controllable preparation of 1000nm porous composite materials

Method used

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  • Micron-nano-sized porous composite material and preparation method thereof
  • Micron-nano-sized porous composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, the preparation of micro-nano porous composite material

[0024] 10g of methyl vinyl silicone resin and 10g of polymer (R=-OH, R'=Ph, x=0.4, y=0.4, z=0.2, n=20) shown in 10g formula (I) and 380g viscosity is 50 Add the Karstedt platinum catalyst of 0.5 mg after the ball milling of centipoise hydroxyl-terminated methyl silicone oil for 4 h (the amount added is 0.0025% of the total mass of the polymer represented by methyl vinyl silicone resin and formula (I), 0.4 g titanic acid Tetrabutyl (for 2% of the total mass of polymer shown in methyl vinyl silicone resin and formula (I), 0.1g dibutyltin dilaurate (for methyl vinyl silicone resin and formula (I) 0.5% of the total mass of the polymer) mixed evenly, impregnated in 150×150×20mm, density 160Kg / m 3 The mullite fiber needle felt (the quality of the mullite fiber needle felt is 72g, and its mass fraction ratio with the total mass of the polymer shown in methyl vinyl silicone resin and formula (I) is 3.6:1 ...

Embodiment 2

[0025] Embodiment 2, the preparation of micro-nano porous composite material

[0026] Add 3g of chopped glass fiber with a length of 3mm (diameter 9-13μm) (the mass fraction ratio to methylphenyl silicone resin is 0.3:1), add 10g of methylphenyl silicone resin, 3g of particle size 5 Micron mica powder (the ratio of volume and fraction to methylphenylvinyl silicone resin is 0.1:1), 200g of simethicone oil with a viscosity of 10cS, methyltrimethoxysilane, 10mL of xylene, and 0.05g Dibutyltin dilaurate (0.5% of the mass of methylphenyl silicone resin) was stirred and mixed evenly, poured into a mold, vacuumed to remove solvent and air bubbles, and placed in a blast oven at 80°C for 24 hours. Then put it in a high-temperature bell jar furnace protected by argon flow, raise the temperature to 250°C at a rate of 1°C / min and keep it for 1h, and raise the temperature to 400°C at a rate of 0.5°C / min and keep it for 6h to obtain chopped glass fibers The reinforced highly hydrophobic si...

Embodiment 3

[0027] Embodiment 3, the preparation of micro-nano porous composite material

[0028] Mix 1g of vermiculite powder (about 5 μm in particle size, its total volume fraction ratio with methyl silicone resin and polymer represented by formula (I) is 0.5:1) with 10 g of methyl silicone resin, 10 g of formula (I) Polymer (R=-OH, R'=CH 2 CH 2 Si(OMe) 3 , x=0.6, y=0.3, z=0.1, n=200) and 250g viscosity is the simethicone oil of 20cS, 0.4g cobalt naphthenate (for methyl silicone resin and polymer shown in formula (I) 2% of the total mass) mixed by ball milling, stirring and mixing, pouring to a density of 0.1g / cm 3 On about 26g of non-alkali glass fiber mat (the ratio by mass and number of its total mass to the total mass of methyl silicone resin and the polymer represented by formula (I) is 1.3:1), vacuumize and remove air bubbles, place it in 130°C for blasting Keep warm in the oven for 4h. Then place it in a high-temperature bell jar furnace protected by argon flow, raise the te...

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Abstract

The invention provides a preparation method for a micron-nano-sized porous composite material, which comprises the following steps of: mixing an organic silicone polymer, a catalyst and a solvent to obtain a glue solution; mixing the glue solution with fibers or infiltrating the glue solution on the fibers to obtain a composition of the glue and the fibers; heating, solidifying and shaping the composition of the glue and the fibers to obtain a fiber-enhanced gel solid; heating the fiber-enhanced gel solid to 400-850 DEG C; and carrying out pyrolysis to obtain the micron-nano-sized porous composite material. The organosilicon polymer is at least one of polysiloxane and organic silicon resin disclosed in a formula (I). The method provided by the invention can be used for preparing a Si-C-O organic resin matrix and semi-organic semi-inorganic porous composite material from the nanoscale to the micron size.

Description

technical field [0001] The invention relates to a micro-nano porous composite material and a preparation method thereof. Background technique [0002] Porous ceramics have excellent properties such as low density, high permeability, good heat insulation, corrosion resistance, and high temperature resistance, and are widely used in environmental protection energy, mechanical electronics, petrochemical, aerospace and other fields. Compared with conventional porous ceramics with pore diameters above the micron scale, porous ceramics with micro-nano pore sizes have high specific surface area, better heat insulation performance, higher strength at the same density, and other advantages endowed by micro-nano pore sizes. Special purpose has become an important research and development hotspot in recent years. Especially porous materials (aerogels) with high porosity (usually more than 80%) and three-dimensional nanoporous network, such as silica aerogels, carbon aerogels, have sup...

Claims

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Application Information

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IPC IPC(8): C04B38/00C08L83/05C08L83/07C08L83/04C08K13/04C08J9/28
Inventor 李永明徐彩虹陈丽敏吴纪全王丁王秀军
Owner INST OF CHEM CHINESE ACAD OF SCI
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