Method for preparing organic-inorganic hybrid octafunctional epoxy POSS resin and method for preparing carbon fiber reinforced composite material

A reinforced composite material and hybrid eight-functional technology, which is applied in the field of POSS resin preparation, can solve problems such as poor performance, and achieve the effects of high yield, clear chemical composition, and low cost

Active Publication Date: 2019-01-11
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing organic-inorganic hybrid octafunctional epoxy POSS resin and carbon fiber reinforced composite material in order to solve the problem that the performance of the current carbon fiber / epoxy resin composite material is poor at high temperature, thereby limiting the application The preparation method, the interlaminar shear strength value of the prepared carbon fiber reinforced composite material can be as high as 22.21Mpa under the high temperature condition of 200°C

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  • Method for preparing organic-inorganic hybrid octafunctional epoxy POSS resin and method for preparing carbon fiber reinforced composite material
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  • Method for preparing organic-inorganic hybrid octafunctional epoxy POSS resin and method for preparing carbon fiber reinforced composite material

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specific Embodiment approach 1

[0020] Embodiment 1: This embodiment records a preparation method of an organic-inorganic hybrid octafunctional epoxy POSS resin, and the method is specifically as follows:

[0021] At room temperature, add 10~1000mL of organic solvent, 3~15mL of 3~20% tetramethylammonium hydroxide aqueous solution and 5~100g of 2-(3, 4-epoxycyclohexyl) into a round-bottomed flask -Ethyltriethoxysilane or 2-(3,4 epoxycyclohexyl)-ethyltrimethoxysilane, stir and react at 20℃~90℃ for 6~200h; after the reaction, 70% of the The solvent was evaporated using a rotary evaporator to obtain a colorless and transparent liquid, namely an organic-inorganic hybrid octafunctional epoxy POSS resin, with a yield of 89.4%. The present invention utilizes 2-(3, 4 epoxycyclohexyl)-ethyltriethoxysilane or 2-(3,4 epoxycyclohexyl)-ethyltrimethoxysilane as monomer, and uses tetrahydrofuran and the like as solvent , an organic-inorganic hybrid octafunctional epoxy POSS resin with POSS as the core, 8 siloxane chains as...

specific Embodiment approach 2

[0022] Embodiment 2: The preparation method of an organic-inorganic hybrid octafunctional epoxy POSS resin described in Embodiment 1, wherein the organic solvent is toluene, xylene, ethylbenzene, acetone, butanone, tetrahydrofuran, One or more of methanol, ethanol and isopropanol. The polarity of the solvent has a great influence on the hydrolysis and condensation of siloxane. Hydrolysis of siloxane produces hydroxyl groups, and hydrogen bonds are formed between the hydroxyl groups to hinder the subsequent condensation reaction. Properly increasing the polarity of the solvent can weaken the hydrogen However, if the polarity of the solvent is too large, the solubility of the condensation intermediate in the solvent is poor, which is unfavorable for the continuation of the condensation. Therefore, the above solvent is selected because the cost is low and the yield is high.

specific Embodiment approach 3

[0023] Embodiment 3: A method for preparing a carbon fiber reinforced composite material by using the organic-inorganic hybrid octafunctional epoxy POSS resin prepared in Embodiment 1 or 2 as a matrix, and the method is as follows:

[0024] Mix organic-inorganic hybrid octafunctional epoxy POSS resin and epoxy resin curing agent at 30~120℃ and stir evenly to obtain a POSS-based epoxy resin composition. Put 20~60 loops of wrapped fibers in POSS Infiltrate the base epoxy resin composition for 3~60min, transfer it to the mold, start heating and curing, the heating rate is 10℃ / min, the pressure is 50~150Mpa at 140℃, and the curing temperature is 80~200℃. The three temperatures are used as the curing stage, and the curing time is 3-15h, that is, the carbon fiber reinforced composite material is obtained.

[0025] Specific embodiment four: a kind of method for preparing carbon fiber reinforced composite material described in specific embodiment three, the mass ratio of described org...

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Abstract

The invention provides a method for preparing organic-inorganic hybrid octafunctional epoxy POSS resin and a method for preparing carbon fiber reinforced composite material, and belongs to the technical field of POSS resin preparation. The method comprises the following steps: adding an organic solvent, a tetramethylammonium hydroxide aqueous solution and 2-(3,4 epoxycyclohexyl)-ethyltriethoxysilane or 2-(3,4 epoxycyclohexyl)-ethyltrimethoxysilane into a round-bottom flask, stirring and reacting; evaporating away 70 percent of solvent by utilizing a rotary evaporator to obtain a colorless transparent liquid; mixing the transparent liquid with an epoxy resin curing agent, and uniformly stirring to obtain a POSS-based epoxy resin composition; and soaking wound fibers in the transparent liquid, transferring into a die, and starting to heat and cure to obtain the carbon fiber reinforced composite material. The method has the advantages of simple operation steps, mild reaction condition, easily available raw materials, low cost and high yield. The carbon fiber reinforced composite material has relatively high interlaminar shear strength at 200 DEG C.

Description

technical field [0001] The invention belongs to the technical field of POSS resin preparation, in particular to a preparation method of an organic-inorganic hybrid octafunctional epoxy POSS resin and a preparation method of a carbon fiber reinforced composite material. Background technique [0002] Polyhedral oligomeric sesquisilane (POSS for short) is a compound with nanoscale cage-like structure, also known as cubic silane, with the general formula of (RSiO 1.5 ) n, the basic structural unit is -Si-O-, the scale of the entire molecule is between 1 and 3 nm, and it is the smallest silicon particle. Its molecule takes the silicon-oxygen skeleton as the core, and the eight Si vertices are connected with organic substituent groups. The inorganic silicon-oxygen skeleton can endow the material with good heat resistance and mechanical properties, and the peripheral organic groups are designed as reactive groups such as epoxy. POSS group, olefin group, silanol group, acryloyloxy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/14C08L83/08C08K7/06C08J5/04
CPCC08G77/14C08J5/042C08J2383/08C08K7/06
Inventor 刘丽黄玉东宋冉冉何志超张润泽
Owner HARBIN INST OF TECH
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