Micro-nano porous material and preparation method thereof

A porous material, micro-nano technology, applied in ceramic products, other household utensils, household utensils, etc., can solve the problems of time-consuming and large consumption, achieve wide adjustable range, suppress the generation of defects and cracks, safe and easy The effect of recycling

Active Publication Date: 2013-07-17
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The water in the hydrogel was replaced by a low surface tension solvent, and the Si-OH group was replaced by Si-CH through surface modification. 3 The solvent exchange-surface modification method of group replacement can reduce and reduce the problem of drying shrinkage and fragmentation, but it also brings the problem of very time-consuming and large amount of solvent consumption caused by multi-step solvent exchange

Method used

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  • Micro-nano porous material and preparation method thereof
  • Micro-nano porous material and preparation method thereof
  • Micro-nano porous material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, preparation of micro-nano porous material

[0038] Polymer (R=-CH=CH) shown in formula (I) 2 , x=0.71, y=0.29, z=0) 4.8g and viscosity are 1.2g of simethicone oil 1000cS (centistokes), and the Karstedt catalyst of 0.3mg, its addition is the polymer shown in formula (I) 0.00625%, mix well, vacuumize to remove air bubbles, pour into a 15mL glass beaker, then heat up to 140°C at a heating rate of 1°C / min, and keep it warm for 3 hours to solidify, and release it after cooling down to room temperature to obtain white Cylinder gel solid sample; then place the sample in a nitrogen-protected tube furnace, raise the temperature to 250°C at a heating rate of 1°C / min and keep it for 2 hours, then raise the temperature to 400°C at a heating rate of 1°C / min ℃, raised the temperature to 550°C at a heating rate of 0.5°C / min and kept it for 2 hours, continued to raise the temperature to 650°C at a heating rate of 0.5°C / min and kept it for 1 hour, and obtained a yellow ha...

Embodiment 2

[0039] Embodiment 2, the preparation of micro-nano porous material

[0040] Polymer (R=-CH=CH) shown in formula (I) 2 , x=0.71, y=0.29 (x / y=2.5), z=0) 3.0g and viscosity are simethicone 3.0g of 1000cS, and the Karstedt catalyst of 0.03mg (for the polymer shown in (I) 0.001% of the mass) were mixed evenly, vacuumed to remove air bubbles, poured into a 15mL glass beaker, and then solidified in an oven at 140°C for 6 hours, and demolded after cooling down to room temperature to obtain a white cylindrical gel solid sample; then Place the sample in a tube furnace protected by a nitrogen atmosphere, raise the temperature to 250°C at a heating rate of 1°C / min and keep it for 2 hours, then raise the temperature to 400°C at a heating rate of 1°C / min, and then increase the temperature at a rate of 0.5°C / min The heating rate was raised to 550°C and kept for 2 hours, and the temperature was continued to be raised to 650°C at a heating rate of 0.5°C / min and kept for 1 hour to obtain a por...

Embodiment 3

[0041] Embodiment 3, the preparation of micro-nano porous material

[0042] Polymer (R=-CH=CH) shown in formula (I) 2 , x=0.71, y=0.29, z=0) 10g and viscosity are 20g of simethicone oil 350cS, and the Karstedt catalyst of 0.09mg (0.0009% of the quality of the polymer shown in (I)), mix uniformly, Vacuumize to remove air bubbles, pour it into a disc with a diameter of 60mm, then raise the temperature to 180°C at a heating rate of 0.5°C / min, and keep it warm for 2 hours for curing. A white disc with a thickness of 10.4mm. Put the cured disc in an atmosphere furnace protected by argon, raise the temperature to 400°C at a heating rate of 2°C / min, raise the temperature to 480°C at a heating rate of 1°C / min, and continue to increase the temperature at a rate of 0.5°C / min Raise the temperature to 550°C and keep it for 2 hours, then continue to raise the temperature to 700°C at a rate of 0.5°C / min and keep it for 1 hour to obtain a yellow hard and tough micro-nano material with a po...

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Abstract

The invention provides a micro-nano porous material and a preparation method thereof. The preparation method comprises the following steps: mixing an organosilicon polymer, a catalyst and a solvent, thereby obtaining a mixture; heating, solidifying and molding the mixture, thereby obtaining a gel solid; and heating the gel solid to 400-850 DEG C for carrying out pyrolysis, thereby obtaining the micro-nano porous material. The organosilicon polymer is at least one of the polysiloxane and organic silicon resin represented by formula (I). According to the preparation method, the heat-resisting micro-nano porous material can be prepared; the steps of supercritical drying and solvent replacement or surface modification, and the like, are not needed in the preparation process; and the preparation method has the advantages of process safety, environmen-friendly, simpleness, economy and the like.

Description

technical field [0001] The invention relates to a micro-nano porous material and a preparation method thereof, belonging to the technical field of high-temperature-resistant polymers and porous materials. 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 thr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C08L83/04C08L83/07C08K7/00C08K3/04C08J9/28
Inventor 李永明吴纪全徐彩虹王丁王秀军陈丽敏
Owner INST OF CHEM CHINESE ACAD OF SCI
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