Preparation method of nano epoxy resin composite material

A nano-composite material and epoxy resin technology, applied in the direction of epoxy resin coating, epoxy resin glue, adhesive type, etc., can solve the problems of high cost, high density, and difficult degradation of composite materials, and achieve less pollution, Improve the effect of bending strength and fracture bending deformation, excellent mechanical properties and dimensional stability

Inactive Publication Date: 2012-06-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the traditional epoxy resin-based nanocomposites use inorganic nanoparticles. Although some properties have been improved, the composite materials have disadvantages such as difficult degradation, high density and high cost.

Method used

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  • Preparation method of nano epoxy resin composite material
  • Preparation method of nano epoxy resin composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of epoxy resin nano composite material, it comprises the steps:

[0030] 1) Pretreatment of raw materials: liquid epoxy resin E51 (epoxy value between 0.48 and 0.52mol / 100g) is vacuum-dried to remove water at 50°C (vacuum degree is -0.1MPa), and the time for vacuum drying to remove water is 120min, until the liquid epoxy resin becomes clear and no bubbles come out;

[0031] Diethylenetriamine (curing agent) is purified by vacuum distillation before use (collecting fractions at about 85-90°C under a vacuum of -0.098MPa), so that the purity of the curing agent is greater than or equal to 95wt%;

[0032] 2) Extraction of starch nanocrystals through sulfuric acid solution: press H 2 SO 4 The proportioning of solution, pea starch, deionized water is 250mL: 36.00g: 100mL, choose 3.16mol / L H 2 SO 4 Solution, pea starch and deionized water, set aside;

[0033] Under the condition of stirring, pea starch was added to the 3.16mol / L H 2 SO 4 solution co...

Embodiment 2

[0041] A preparation method of epoxy resin nano composite material, it comprises the steps:

[0042] 1) Pretreatment of raw materials: Bisphenol A epoxy resin E51 is vacuum-dried at 100°C to remove water (vacuum degree is -0.1MPa), and the time for vacuum drying to remove water is 180min until the liquid epoxy resin becomes clear And no bubbles come out;

[0043] Diethylenetriamine (curing agent) is purified by vacuum distillation before use (collecting fractions at about 85 to 90°C under a vacuum of -0.098MPa), so that the purity of the curing agent is greater than or equal to 95wt%; the curing agent can be diethylenetriamine Any of aliphatic polyamines such as amine, triethylenetetramine, tetraethylenepentamine, or diethylaminopropylamine.

[0044] 2) First prepare 250mL 3.16mol / L H 2 SO 4 solution, and when the temperature of the sulfuric acid solution dropped to room temperature, it was transferred to a 500mL round bottom flask. Take by weighing 36.00g dry pea starch r...

Embodiment 3

[0049] Same as Example 1, change the epoxy resin E51 of the third step {i.e. step 3)}: the mass ratio of starch nanocrystals to 100: 1.5, and change the oil bath temperature, stirring rate, stirring time and ultrasonic time to 60°C respectively , 800rpm, 50min and 30min; the stirring time and vacuum degassing time of the fourth step were changed to 10min and 10min respectively; the degassing time of the fifth step was changed to 10min, curing at room temperature for 3 days, and post-curing at 90°C for 8 hours.

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Abstract

The invention relates to a preparation method of a nano epoxy resin composite material. The preparation method of the nano epoxy resin composite material is characterized by comprising the following steps of: 1) pre-processing raw materials; 2) extracting a starch nano-crystal under an effect of a sulfuric acid solution so as to obtain white cotton-shaped starch nano-crystal; 3) melting and blending pre-processed liquid epoxy resin and the starch nano-crystal, so as to obtain an epoxy resin / starch nano-crystal composite; 4) adding a curing agent into the epoxy resin / starch nano-crystal composite so as to obtain an epoxy resin / starch nano-crystal prepolymer; and 5) curing and forming the epoxy resin / starch nano-crystal prepolymer, and pouring the epoxy resin / starch nano-crystal prepolymer into a die to form, so as to obtain the nanometer epoxy resin composite material. The preparation method disclosed by the invention has the advantages of simple process, low cost and environmental friendless.

Description

technical field [0001] The invention relates to a preparation method of an epoxy resin nanocomposite material, belonging to the technical field of new materials. Background technique [0002] Starch nanocrystals are an important member of polysaccharide nanocrystals, with a size ranging from tens to more than a hundred nanometers. They are mainly composed of amylopectin with good crystallinity, and can be obtained by hydrolyzing starch granules. Under the action of acid, alkali or ultrasound, the amorphous amylopectin in the starch granules is first hydrolyzed, and the molecularly arranged and compact crystalline amylopectin region remains, which is the desired sheet structure starch nanocrystal. And the hydrolysis method is currently the most important method for preparing starch nanocrystals. Starch nanocrystals have good biocompatibility, biorenewability and degradation, high strength, high modulus, low density, abundant sources, low cost, and large-scale high-quality pr...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L3/02C08G59/50C09D163/00C09J163/00
Inventor 黄进尚武林阿兰·迪弗雷纳张荣贵章桥新任红轩
Owner WUHAN UNIV OF TECH
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