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Preparation method for anhydride cured epoxy resin/palygorskite nanocomposite material

A technology for curing epoxy resin and nanocomposite materials, which is applied in the field of preparation of acid anhydride cured epoxy resin/palygorskite nanocomposite materials, can solve the problem of high cost of synthetic materials and the inability to effectively and significantly improve the toughness, mechanical properties and Thermal stability and other issues, to achieve low cost, increase affinity and interface compatibility, improve toughness and strength

Inactive Publication Date: 2012-03-28
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the high cost of synthetic materials introduced in current anhydride-cured epoxy resin materials, and the inability of mineral fillers such as montmorillonite to effectively and significantly improve the toughness, mechanical properties and thermal stability of synthetic materials at the same time, and propose a Using palygorskite with high specific surface area, high surface activity and high aspect ratio as a functional filler to prepare an anhydride-cured epoxy resin / palygorskite composite material with significantly improved toughness, strength and thermal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw material of palygorskite is from Xuyi, Jiangsu Province, the purity is 96%, and it is activated by calcining at 180 degrees for 1 hour. Weigh 31.1g of E44 epoxy resin, add it to a 100ml beaker, heat it to 80°C, add 1% of the purified Mingguang Guanshanpo gozoite (0.311g), stir for 10 minutes, ultrasonic for 30 minutes, add the mass of epoxy resin 20% pyromellitic anhydride is 6.22g, rapid stirring reaction for 60 minutes, vacuum degassing for 10 minutes, heating up to 120°C for slow stirring reaction for 90 minutes, vacuum degassing for 8 minutes, used for casting or packaging electronic and electrical products and Heat to cure. In order to test the performance of the casting material, it was injected into the mold and cured at 130°C for 2 hours. Samples of pure anhydride-cured epoxy resin materials were prepared in the same way. DMA dynamic mechanical spectrometer, impact testing machine, universal material testing machine, TG thermogravimetric analyzer, etc....

Embodiment 2

[0025] The raw material of palygorskite comes from Mingguang, Anhui Province, with a purity of 95%, and is activated by calcination at 300 degrees for 1 hour. Weigh 30.1g of E44 epoxy resin, put it into a 100ml beaker, heat it to 80°C, add 2% of the purified Mingguang official mountain slope stone (0.602g), stir for 10 minutes, ultrasonic for 30 minutes, add pyromellitic anhydride 6.02g, rapid stirring reaction for 60 minutes, vacuum degassing for 10 minutes, heating up to 120°C for slow stirring reaction for 120 minutes, vacuum degassing for 6 minutes, used for casting or packaging electronic and electrical products and heating and curing. In order to test the performance of the casting material, it was injected into the mold and cured at 130°C for 2 hours. Samples of pure anhydride-cured epoxy resin materials were prepared in the same way. DMA dynamic mechanical spectrometer, impact testing machine, universal material testing machine, TG thermogravimetric analyzer, etc. wer...

Embodiment 3

[0027] The raw material of palygorskite comes from Mingguang, Anhui Province, with a purity of 95%, and is activated by calcination at 200 degrees for 1 hour. Weigh 30.5g of E44 epoxy resin, put it into a 100ml beaker, heat to 80°C, add 0.915g of purified Mingguangguan hillside gorthite, stir for 10 minutes, ultrasonicate for 30 minutes, add 9.15g of pyromellitic anhydride, and quickly Stir the reaction for 60 minutes, vacuum degassing for 10 minutes, raise the temperature to 120°C and slowly stir for 85 minutes, and vacuum degassing for 10 minutes. It is used for casting or packaging electronic and electrical products and heating and curing. In order to test the performance of the casting material, it was injected into the mold and cured at 130°C for 2 hours. Samples of pure anhydride-cured epoxy resin materials were prepared in the same way. DMA dynamic mechanical spectrometer, impact testing machine, universal material testing machine, TG thermogravimetric analyzer, etc. w...

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Abstract

The invention relates to a preparation method for an anhydride cured epoxy resin / palygorskite nanocomposite material. The preparation method comprises the following steps of: grinding palygorskite into mineral powder; performing calcining activation treatment on the palygorskite mineral powder; heating and liquefying epoxy resin; adding the palygorskite in an amount which is 1 to 8 percent of themass of the epoxy resin, mixing and stirring; adding an anhydride curing agent in an amount which is 20 to 40 percent of the mass of the epoxy resin; stirring the obtained mixture; and vacuumizing, degassing and the like to obtain the composite material. The product is generally used for casting or encapsulating electronic and electrical products, and heating and curing. The preparation method has the advantages of obviously improving the toughness of an epoxy resin anhydride cured material and obviously improving mechanical properties and heat stability, and is easy to implement and low in cost.

Description

technical field [0001] The invention relates to a method for preparing an acid anhydride cured epoxy resin / palygorskite nanocomposite material. Background technique [0002] Epoxy resin has excellent mechanical, electrical, and bonding properties, and is widely used in coatings, composite materials, high-performance adhesives, electrical insulation materials, etc.; however, epoxy resin curing often has problems such as bubbles, cracks, and brittle fracture. Especially the epoxy resin / anhydride curing system has fatal weaknesses such as high brittleness and easy cracking. At present, the epoxy resin is mainly modified by adding elastomers or materials with a soft molecular structure, but these methods often reduce the mechanical modulus and heat resistance of the cured product while improving the toughness of the epoxy resin (Zhao Shiqi, 1998 , Communication of Insulating Materials; Xu Li, 2008, Guangzhou Chemical; China Invention Patent, application number 200810202164.7). ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/42C08K9/00C08K9/04C08K3/34C08L63/00
Inventor 颜文昌袁鹏陈鸣吴玉程刘冬詹建华
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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