Fiber-reinforced heat-insulating silicone aerogel composite material and preparation method thereof

A composite material and fiber-reinforced technology, which is applied in the field of organosilicon airgel thermal insulation composite materials and its preparation, can solve the problems of unreported material thermal insulation performance and cumbersome steps, and achieve strong machinability, simple preparation process, The effect of low density

Active Publication Date: 2018-10-12
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although raw material costs are low, the steps required for subsequent processing are

Method used

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  • Fiber-reinforced heat-insulating silicone aerogel composite material and preparation method thereof
  • Fiber-reinforced heat-insulating silicone aerogel composite material and preparation method thereof
  • Fiber-reinforced heat-insulating silicone aerogel composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh a certain amount of urea and acetic acid (5mmol / L) respectively, add them to the reaction kettle, stir mechanically until they are completely dissolved, then add MTMS (methyltrimethoxysilane), DMDMS (dimethyldimethoxy Silane) and CTAC (cetyltrimethylammonium chloride) were vigorously stirred for 0.5-1h to obtain a silicone solution. The mass ratio of urea, acetic acid (5mmol / L), MTMS, DMDMS and CTAC is 14.41:43.21:11.44:1.93:2.27.

[0029] Set the density to 170Kg / m 3 The quartz needle-punched fiber mat is cut into a size of 150×150mm 2 , and placed in an oven at 100°C for heat treatment for more than 6 hours; the heat-treated quartz needle-punched fiber mat was laid flat in a stainless steel mold customized in the laboratory, and the above-mentioned organosilicon solution was used to slowly impregnate the quartz needle-punched fiber at normal temperature and pressure. Felt until the silicone impregnating solution can completely infiltrate, then seal the mold, p...

Embodiment 2

[0031] Weigh a certain amount of urea and acetic acid (5mmol / L) respectively, add them into the reaction kettle, stir mechanically until they are completely dissolved, then add MTMS, DMDMS and CTAC in turn and stir vigorously for 0.5-1h to obtain a silicone solution. The mass ratio of urea, acetic acid (5 mmol / L), MTMS, DMDMS, and CTAC is 14.41:43.21:10.18:2.96:2.27.

[0032] Set the density to 170Kg / m 3 The quartz needle-punched fiber mat is cut into a size of 150×150mm 2 , and placed in an oven at 100°C for heat treatment for more than 6 hours; the heat-treated quartz needle-punched fiber mat was laid flat in a stainless steel mold customized in the laboratory, and the above-mentioned organosilicon solution was used to slowly impregnate the quartz needle-punched fiber at normal temperature and pressure. Felt until the silicone impregnating solution can completely infiltrate, then seal the mold, place it in an oven at 80°C, and undergo 12h of sol-gel reaction and aging moldi...

Embodiment 3

[0034] Weigh a certain amount of urea and acetic acid (5mmol / L) respectively, add them into the reaction kettle, stir mechanically until they are completely dissolved, then add MTMS, DMDMS and CTAC in turn and stir vigorously for 0.5-1h to obtain a silicone solution. The mass ratio of urea, acetic acid (5 mmol / L), MTMS, DMDMS, and CTAC is 14.41:43.21:10.18:2.96:2.27.

[0035] Set the density to 120Kg / m 3 The glass fiber mat is cut into a size of 150×150mm 2 , and placed in an oven at 100°C for heat treatment for more than 6 hours; the heat-treated quartz needle-punched fiber mat was laid flat in a stainless steel mold customized in the laboratory, and the above-mentioned organosilicon solution was used to slowly impregnate the quartz needle-punched fiber at normal temperature and pressure. Felt, until the silicone impregnating liquid can be completely infiltrated, then seal the mold, place it in an oven at 80°C, undergo 12h of sol-gel reaction, aging and molding; Wash 3 time...

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Abstract

The invention relates to a fiber-reinforced heat-insulating silicone aerogel composite material and a preparation method thereof. The fiber-reinforced heat-insulating silicone aerogel composite material is prepared by the following steps of taking siloxane polymers with porous structure as a base, as well as flexible fiber felt as a reinforcement; blending a silicone solution; immersing the fiberfelt with the silicone solution; carrying out sol-gel processing; and carrying out washing and drying and so on. Compared with the prior art, the fiber-reinforced heat-insulating silicone aerogel composite material prepared by the preparation method is excellent in heat-insulating property, very high in mechanical durability and hydrophobicity, simple in preparation processes, and low in cost; moreover, the fiber-reinforced heat-insulating silicone aerogel composite material has certain flexibility, so that the fiber-reinforced heat-insulating silicone aerogel composite material is high in designability and convenient for future size-cutting. Generally, the fiber-reinforced heat-insulating silicone aerogel composite material meets basic insulation requirements; and thus, the fiber-reinforced heat-insulating silicone aerogel composite material is applicable to a variety of areas, including buildings, walls, pipes and the like.

Description

technical field [0001] The invention belongs to the field of heat insulation materials, and in particular relates to a fiber-reinforced organosilicon airgel heat insulation composite material and a preparation method thereof. Background technique [0002] SiO 2 Airgel is a lightweight porous inorganic non-metallic material made of SiO 2 The mesoporous structure formed by particles has extremely low density and thermal conductivity, which makes it have unique advantages in thermal insulation, and is widely used in aerospace, industrial, military and civil fields. Pure SiO 2 Airgel itself is brittle and easily broken under stress, so the flexibility and hydrophobicity are achieved by introducing organic parts into the inorganic network to make silicone aerogel. Fiber reinforcement can also improve its mechanical properties. Organosilicon airgel is mainly prepared by the sol-gel method with relatively mature technology. Changing the composition or concentration of the precu...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K7/10C08K7/14
CPCC08K7/10C08K7/14C08L2205/14C08L83/04
Inventor 龙东辉姚鸿俊董金鑫朱召贤
Owner EAST CHINA UNIV OF SCI & TECH
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