Tung oil-based epoxy resin composite material and preparation method thereof

A technology based on epoxy resin and composite materials, which is applied in the field of tung oil-based epoxy resin composite materials and its preparation, can solve the problems of poor antistatic effect, poor impact resistance, lack of flexibility, etc., and achieve high elongation at break, Inexpensive, wide-ranging effects

Active Publication Date: 2019-01-29
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved: In order to solve the problems such as the ubiquitous brittleness of epoxy resin materials, poor impact resistance, lack of flexibility, and poor antistatic effect, a kind of tung oil-based epoxy resin composite material and its preparation method of the present invention, adopt solution Blending method, the inorganic nanoparticles grafted with amino groups and tung oil-based epoxy resin are blended to obtain tung oil-based epoxy resin composite materials, and the nanoparticles react with the epoxy groups in the epoxy resin under the action of amino groups to better Dispersed in the epoxy resin, the prepared composite material has excellent performance

Method used

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  • Tung oil-based epoxy resin composite material and preparation method thereof
  • Tung oil-based epoxy resin composite material and preparation method thereof
  • Tung oil-based epoxy resin composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Step 1, tung oil fatty acid methyl ester (1.00g), fumaric acid (0.35g) and acetic acid (1.75g) were added into the flask and then refluxed for 48h. After recovering acetic acid with a rotary evaporator under vacuum, dichloromethane was added dropwise to the reaction residue to precipitate excess fumaric acid and filtered, and the filtrate was vacuum evaporated with a rotary evaporator to obtain a crude product; 129g of the crude product was dissolved in 500mL In acetone, add 50wt.% sodium hydroxide solution dropwise to neutralize to pH 7, after removing acetone, add 100mL n-hexane and 400mL water to separate unreacted fatty acid methyl ester. The aqueous layer was saponified with excess sodium hydroxide and then acidified with 1M hydrochloric acid solution. The separated tribasic acid was extracted with ethyl acetate. After the organic layer was washed with water, anhydrous Na was added 2 SO 4 Dry for 12 hours, remove ethyl acetate with a vacuum rotary evaporator to ...

Embodiment 2

[0025]Step 1, tung oil fatty acid methyl ester (1.00g), acrylic acid (0.20g) and acetic acid (1.75g) were added into the flask and then refluxed for 48h. After the acetic acid was recovered with a rotary evaporator under vacuum, dichloromethane was added dropwise to the reaction residue to precipitate excess acrylic acid and filtered, and the filtrate was vacuum evaporated with a rotary evaporator to obtain a crude product; 129g of the crude product was dissolved in 500mL of acetone , Add 50wt.% sodium hydroxide solution dropwise to neutralize to pH 7, remove acetone, add 100mL n-hexane and 400mL water to separate unreacted fatty acid methyl ester. The aqueous layer was saponified with excess sodium hydroxide and then acidified with 1M hydrochloric acid solution. The precipitated dibasic acid was extracted with ethyl acetate. After the organic layer was washed with water, anhydrous Na was added 2 SO 4 Dry for 12 hours, remove ethyl acetate with a vacuum rotary evaporator to...

Embodiment 3

[0030] Step 1, tung oil fatty acid methyl ester (1.00g), fumaric acid (0.35g) and acetic acid (1.75g) were added into the flask and then refluxed for 48h. After recovering acetic acid with a rotary evaporator under vacuum, dichloromethane was added dropwise to the reaction residue to precipitate excess fumaric acid and filtered, and the filtrate was vacuum evaporated with a rotary evaporator to obtain a crude product; 129g of the crude product was dissolved in 500mL In acetone, add 50wt.% sodium hydroxide solution dropwise to neutralize to pH 7, after removing acetone, add 100mL n-hexane and 400mL water to separate unreacted fatty acid methyl ester. The aqueous layer was saponified with excess sodium hydroxide and then acidified with 1M hydrochloric acid solution. The separated tribasic acid was extracted with ethyl acetate. After the organic layer was washed with water, anhydrous Na was added 2 SO 4 Dry for 12 hours, remove ethyl acetate with a vacuum rotary evaporator to ...

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Abstract

The invention provides a tung oil-based epoxy resin composite material and a preparation method thereof. The preparation method comprises the following steps: weighing inorganic nanoparticles surface-grafted with amino groups, dispersing the inorganic nanoparticles in a solvent, adding tung oil-based epoxy resin and an epoxy curing agent into the obtained dispersion liquid, continuing ultrasonic treatment, removing the solvent under vacuum by using a rotary evaporator, adding an accelerant and carrying out uniform mixing under stirring to obtain a tung oil-based epoxy resin cured compound; andputting the tung oil-based epoxy resin cured compound into a vacuum oven, performing defoaming under vacuum conditions, pouring the tung oil-based epoxy resin cured compound into a mold, and performing gradient curing in an oven so as to obtain the tung oil-based epoxy resin composite material. Compared with bisphenol A epoxy resin, the tung oil-based epoxy resin composite material of the invention has higher tensile strength (up to 61.27 MPa), excellent elongation at break (up to 8.13%) and good antistatic effect (with conductivity reaching 3.45*10<-6> S / cm). The tung oil-based epoxy resin of the invention is derived from the renewable resource tung oil, has the advantages of wide sources, renewability and the like, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a tung oil-based epoxy resin composite material and a preparation method thereof. Background technique [0002] Since bisphenol A epoxy resin was synthesized in 1930, it has been widely used in various fields of our national economy due to its good chemical corrosion resistance, good electrical insulation performance, excellent dimensional stability and high mechanical properties. However, due to the rigid structure of its benzene ring, the cured three-dimensional network structure is brittle and has poor impact resistance, which seriously affects its application in high-tech fields such as aerospace and automobile industries. In order to make up for these defects, researchers have taken many measures, such as adding toughening agents to epoxy resins. Conventional tougheners such as liquid rubber, thermoplastic polymers, and liquid crystal polymers c...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K9/04C08K3/04C08K3/36C08K3/22
CPCC08K3/04C08K3/041C08K3/042C08K3/22C08K3/36C08K9/04C08K2003/2241C08K2201/001C08K2201/011C08L63/00
Inventor 聂小安胡芳芳黄金瑞肖来辉王义刚
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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