Double-shell epoxy resin microcapsule self-repair material and preparation method thereof

A technology of self-healing materials and epoxy resin, which is applied in the direction of microcapsule preparation and microsphere preparation, can solve the problems of adverse effects on stability, poor acid and alkali resistance, poor compatibility, etc., and achieve good chemical stability and Thermal stability, compact structure, and excellent coating performance

Active Publication Date: 2018-11-27
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor acid and alkali resistance of urea-formaldehyde resin or melamine-formaldehyde resin polymer wall materials, it has poor long-term stability in the alkaline environment of cement concrete, and there is a problem of poor compatibility between organic wall materials and cement-based materials. problems, adversely affecting its long-term stability in cement-based materials

Method used

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  • Double-shell epoxy resin microcapsule self-repair material and preparation method thereof
  • Double-shell epoxy resin microcapsule self-repair material and preparation method thereof
  • Double-shell epoxy resin microcapsule self-repair material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A double-shell epoxy resin microcapsule self-repairing material and a preparation method thereof, comprising the following steps:

[0033] (1) 30g of bisphenol A type epoxy resin (E51), 4.5g of butyl glycidyl ether and 15ml of graphene oxide aqueous dispersion, under 80 ℃ of water bath temperature, with 3000r / min emulsification shear stirring 30min, in In this process, drop 60ml of deionized water to form an epoxy resin emulsion, and adjust the pH value of the emulsion to 3-4 with citric acid solution of 10% mass concentration;

[0034] (2) After mixing 4g melamine, 8g urea, and 27g formaldehyde solution, stir magnetically at a water bath temperature of 70°C, adjust the pH value of the mixed solution system to 9-10 with 10% mass concentration of sodium hydroxide solution, and add 30ml deionized water , stirring for 1 h to obtain a viscous transparent urea-formaldehyde prepolymer to generate a low molecular weight water-soluble prepolymer solution;

[0035] (3) Preparat...

Embodiment 2

[0038] A double-shell epoxy resin microcapsule self-repairing material and a preparation method thereof, comprising the following steps:

[0039] (1) 20g of bisphenol A type epoxy resin epoxy resin ((E44), 2.4g of butyl glycidyl ether and 15ml of graphene oxide aqueous dispersion are emulsified and sheared at 2000r / min at a water bath temperature of 85°C Stir for 30 minutes, drop 60ml of deionized water in the process to form an epoxy resin emulsion, adjust the pH of the emulsion to 3-4 with 10% mass concentration of hydrochloric acid;

[0040] (2) After mixing 3 g of melamine, 9 g of urea, and 27 g of formaldehyde solution, stir magnetically at a water bath temperature of 70 ° C, adjust the pH value of the mixed solution system to 9-10 with 10% triethanolamine solution, add 30 ml of deionized water, and stir for 1 h Obtain a viscous transparent urea-formaldehyde prepolymer to generate a low molecular weight water-soluble prepolymer solution;

[0041] (3) Preparation of epoxy...

Embodiment 3

[0044] A double-shell epoxy resin microcapsule self-repairing material and a preparation method thereof, comprising the following steps:

[0045] (1) 10g of bisphenol A type epoxy resin epoxy resin ((E51), 1.5g of butyl glycidyl ether and 15ml of graphene oxide aqueous dispersion are emulsified and sheared at 4000r / min at a water bath temperature of 75°C Stir for 30 minutes, drop 60ml of deionized water in the process to form an epoxy resin emulsion, and adjust the pH of the emulsion to 3-4 with 10% citric acid solution;

[0046] (2) After mixing 2 g of melamine, 10 g of urea, and 27 g of formaldehyde solution, stir magnetically at a water bath temperature of 70 ° C, adjust the pH value of the mixed solution system to 9-10 with 10% sodium carbonate solution, add 30 ml of deionized water, and stir for 1 h Obtain a viscous transparent urea-formaldehyde prepolymer to generate a low molecular weight water-soluble prepolymer solution;

[0047] (3) Preparation of epoxy resin microc...

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Abstract

The invention belongs to the technical field of microcapsule self-repair materials and particularly relates to a double-shell epoxy resin microcapsule self-repair material and a preparation method thereof. Epoxy resin serves as a repairing agent core material of the microcapsule self-repair material. Firstly, a single-shell microcapsule self-repair material with melamine-urea-formaldehyde resin asan inner wall material is prepared according to an in-situ polymerization method; then, a sol-gel method is adopted for preparing the double-layer microcapsule self-repair material with an inorganicSiO2 polymer as an outer wall material. Compared with a traditional emulsifying agent, graphene oxide serving as an epoxy resin emulsifying agent has advantages of nontoxicity and environmental friendliness. The inorganic SiO2 polymer with excellent biocompatibility and resistance to acids and alkalis serves as the outer wall material to improve compatibility of the microcapsule self-repair material to cement concrete materials, and the microcapsule self-repair material is enabled to give a full play to the self-repair performance in the cement concrete materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of microcapsule self-repairing materials, and in particular relates to a double-shell epoxy resin microcapsule self-repairing material and a preparation method thereof. Background technique [0002] Concrete material is the main structural material in my country's infrastructure construction. However, due to the high brittleness of concrete material, microscopic cracks will occur during long-term service. If not repaired in time, it can develop into macroscopic visible cracks and affect the structure of concrete materials. durability. Epoxy resin is a kind of polymer material with good repair performance. By microencapsulating it and embedding it in cement concrete material, when cracks appear inside the cement concrete material, the stress generated by the microcapsule material in the crack Cracking occurs under the action, so that the repairing agent flows out to repair the microscopic crack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/12B01J13/14C04B24/28
CPCB01J13/14C04B20/12C04B20/1037C04B24/281C04B22/02C04B20/1066
Inventor 张毅王可汗柳东明陶善仁任柯柯宋佳欣
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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