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Preparation method of exfoliated montmorillonite-epoxy resin composite

A technology of epoxy resin and composite materials, which is applied in the direction of fibrous filler, dyed low-molecular organic compound treatment, dyed high-molecular organic compound treatment, etc. It can solve the problems of adding epoxy resin molecules, difficult to achieve, and increase, and achieve easy Get, promote the effect of reaction

Active Publication Date: 2011-05-18
WUXI ACRYL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By increasing the temperature of the mixed system and adding special molecules, the probability and proportion of epoxy resin molecules entering the interlayer of montmorillonite can be increased, but the curing process between the layers and the outside of the montmorillonite is carried out at the same time, which cannot promote the montmorillonite. stripping
The increase of shear force can only be carried out during the mixing process, and it is difficult to achieve during the curing process

Method used

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  • Preparation method of exfoliated montmorillonite-epoxy resin composite
  • Preparation method of exfoliated montmorillonite-epoxy resin composite
  • Preparation method of exfoliated montmorillonite-epoxy resin composite

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1 A kind of preparation method of exfoliation type montmorillonite and epoxy resin composite material comprises the following processing steps:

[0036] (1) Organic modification of montmorillonite:

[0037] a, react according to the ratio of hexamethylenediamine: phenol: formaldehyde molar ratio = 1: 0.9: 0.9 to obtain intercalation agent molecules The obtained intercalation agent and deionized water are mixed according to the weight ratio of 1:10, and a hydrochloric acid solution with a concentration of 5 mol / L is added dropwise until the pH value is between 6 and 7 to obtain an intercalation agent salt solution;

[0038] B, disperse 20g montmorillonite in 500g of ionized water, stir 60min under the condition of stirring speed 500 revs / min, obtain the suspension of montmorillonite, the pH value of described montmorillonite suspension is between 7~ between 8;

[0039]c. The temperature of the montmorillonite suspension is raised to 80° C., adding the inter...

Embodiment 2

[0049] Embodiment 2 A kind of preparation method of exfoliation type montmorillonite and epoxy resin composite material comprises the following processing steps:

[0050] (1) the organic modification of montmorillonite is the same as embodiment 1;

[0051] (2) Mix organically modified montmorillonite with epoxy resin and curing agent to obtain a mixed system:

[0052] Under stirring conditions, take m-xylylenediamine 15g, add organically modified montmorillonite 0, 1, 3, 5, 7, 10g, stir for 1 hour and mix evenly, add 100g of epoxy resin E-51, stir for 5 Minute mixing; The stirring speed is 500 rev / min;

[0053] (3) defoaming and curing:

[0054] The mixed system obtained in step (2) is subjected to vacuum defoaming under the condition of vacuum degree of -0.1~-0.09MPa; after the defoaming is completed, the mixed system is poured into the mold and cured according to the following conditions: 25°C for 7 day, cured at 40°C for 16 hours, at 60°C for 8 hours and at 100°C for 2 h...

Embodiment 3

[0060] Embodiment 3 A preparation method of exfoliated montmorillonite and epoxy resin composite material, comprising the following processing steps:

[0061] (1) Organic modification of montmorillonite:

[0062] a, react according to the molar ratio of polyetheramine D-230: phenol: formaldehyde = 1: 0.9: 0.9 to obtain intercalation agent molecules The obtained intercalation agent and deionized water are mixed according to the weight ratio of 1:10, and a hydrochloric acid solution with a concentration of 5 mol / L is added dropwise until the pH value is between 6 and 7 to obtain an intercalation agent salt solution;

[0063] B, disperse 20g montmorillonite in 400g of ionized water, stir 30min under the condition of stirring speed 500 revs / min, obtain the suspension of montmorillonite, the pH value of described montmorillonite suspension is between 7~ between 8;

[0064] c. The temperature of the montmorillonite suspension was raised to 80° C., and an intercalation agent salt ...

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Abstract

The invention relates to a preparation method of an exfoliated montmorillonite-epoxy resin composite. The preparation method is characterized by comprising the following process steps: (1) performing organic modification on montmorillonite: preparing intercalating agent saline solution; adding montmorillonite suspension in the intercalating agent saline solution to ensure that the intercalating agent completely exchanges with positive ions in montmorillonite; performing centrifugal filtration on the obtained suspension, repeatedly washing the obtained solid, which is obtained through filtration, with deionized water, detecting the used deionized water with silver nitrate solution until no white precipitate is generated; performing vacuum drying on the solid obtained by centrifugal filtration; crushing and grinding the obtained solid to ensure that the solid can pass through a 200-mesh sieve, thus obtaining organically modified montmorillonite; (2) mixing the organically modified montmorillonite, epoxy resin and curing agent to obtain a mixed system; and (3) defoaming and curing. By using the intercalating agent in the method provided by the invention, the interlaminar curing reaction can be performed before the external curing reaction, and the exfoliated montmorillonite-epoxy resin composite can be obtained more easily.

Description

technical field [0001] The invention relates to a preparation method of exfoliated montmorillonite and epoxy resin composite material, which belongs to the field of chemical industry. Background technique [0002] Epoxy resin is one of the most commonly used thermosetting polymer materials. It has many advantages in performance, but its poor toughness and poor fatigue resistance after curing limit its application fields. Especially when it is used for megawatt wind power generation blades and other large-scale composite materials that have higher requirements for the strength, toughness and fatigue resistance of the material, it is necessary to modify the epoxy resin to improve toughness and reliability. [0003] There are many ways to toughen epoxy resins, such as rubber elastomer toughening, thermoplastic resin toughening, interpenetrating network structure toughening, flexible segment curing agent toughening and inorganic nanoparticles toughening, etc. Compared with othe...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K9/04C08K3/34C09C1/42C09C3/08C09C3/10
Inventor 张文泉王俊卿朱学军尤卫民
Owner WUXI ACRYL TECH
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