Preparation method of epoxy nanometer hybrid material with low surface energy

A low surface energy, epoxy nanotechnology, applied in the direction of silicon oxide, silicon dioxide, titanium dioxide, etc., can solve the problem of non-obvious improvement of contact angle, antifouling and antibacterial performance, and limit the large-scale production, application and preparation of antifouling coatings Problems such as complex process, to achieve the effect of convenient large-scale production, no dust pollution, and simple reaction equipment

Inactive Publication Date: 2010-10-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many domestic studies on low surface energy epoxy antifouling coatings, but these studies mainly focus on adding some low surface energy substances (such as silicon and fluorine-containing materials) to reduce their surface energy by physical blending, such as Add a certain amount of polymethylsiloxane resin (CN101434805-A; CN200510231417.3; 200910048920.X) or directly add silica to the epoxy resin system (Preparation and characterization of transparent self-cleaning layer: Journal of Jiangsu University of Science and Technology , 2009, 23, 125-128), etc. to prepare low surface energy antifouling coatings, the preparation process may be complicated or dust pollution or high cost or unsatisfactory performance
In addition, the preparation of antifouling coatings with fluorine-containing materials as the main film-forming substance is costly and polluting during the preparation process, which limits the large-scale production and application of antifouling coatings.
Some studies have used low surface energy precursors to prepare nanoparticles by simple hydrolysis method and then compounded with epoxy resin to prepare antifouling coatings, but the improvement of contact angle is not obvious (SiO 2 Encapsulation modification on TiO 2 / Effect of antifouling and antibacterial performance of epoxy resin coating film: new building materials, 2008, 12, 81-83)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 3g titanium tetrachloride, 1g N, N-bis-(triethoxysilylpropyl) imine, 30g resorcinol type epoxy resin, 2.5g dehydrated alcohol and 0.3g ammonia water are fully stirred and mixed Put it into a high-pressure reactor and keep the temperature at 100°C for 3 hours. After the reaction is completed, the product is naturally cooled to room temperature.

[0024] The above product was vacuum degassed to remove residual reactants, then 30g of the product was mixed with 15g of aromatic polyamine, stirred evenly, cured at 80°C and 0MPa for 3h, and then placed in a 100°C oven for post-curing for 30h. That is, a transparent epoxy nano-hybrid material is obtained. It has been tested that its contact angle with water can reach 101°, which is 36° larger than that of pure epoxy resin under the same preparation conditions.

Embodiment 2

[0026] After fully stirring 1g of γ-thiopropyltriethoxysilane, 30g of diglycidyl terephthalate, 8g of polyglycidyl ether and 0.6g of hydrochloric acid, they were placed in a high-pressure reactor and kept at a constant temperature of 160°C for 36h to react After completion, the product was naturally cooled to room temperature.

[0027] Vacuum degas the above product to remove residual reactants, then mix 20g of the product with 4g of polyamide, stir evenly and cure at 100°C and 10MPa for 5h, then put it in an oven at 120°C for post-curing for 20h to obtain Transparent epoxy nanohybrid material. It has been tested that its contact angle with water can reach 97°, which is 32° higher than that of pure epoxy resin under the same preparation conditions.

Embodiment 3

[0029] Mix 4g of propyl titanate, 30g of triglycidyl cyanurate, 5g of acetone and 0.04g of tin salt of an organic acid, mix them thoroughly, put them in an autoclave, and keep the temperature at 120°C for 36h. After the reaction is completed The product was naturally cooled to room temperature.

[0030] Vacuum degas the above product to remove residual reactants, then mix 20g of the product with 8g of organic anhydride, stir evenly and cure at 90°C and 20MPa for 6h, then put it in an oven at 150°C for post-curing for 10h to obtain Transparent epoxy nanohybrid material. It has been tested that its contact angle with water can reach 109°, which is 44° higher than that of pure epoxy resin under the same preparation conditions.

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Abstract

The invention relates to a preparation method of epoxy nanometer hybrid materials with low surface energy. The method comprises the following steps of: firstly, adequately stirring and uniformly mixing epoxy resin, a precursor with low surface energy, a catalyst, a solvent, and the like, placing into a reaction kettle, controlling reaction temperature and time to prepare an epoxy prepolymer containing nanometer particles with low surface energy in situ; then uniformly mixing with a proper amount of curing agent; curing under certain temperature and pressure, and then curing under higher temperature to finally obtain the transparent epoxy nanometer hybrid material with low surface energy. In the invention, the nanometer particles are prepared in situ in the epoxy prepolymer by a solvent thermal method, and the epoxy nanometer hybrid material with low surface energy is prepared by further curing, the reaction device is simple, the sizes and contents of the nanometer particles can be controlled according to actual demands, and the consumption of the solvent is little, therefore, the preparation method of epoxy nanometer hybrid materials with low surface energy is convenient for mass production. The epoxy nanometer hybrid material prepared by the invention has the advantages of favorable hydrophobicity, low surface energy, favorable transparency, high strength, and the like, and can be used as dust proof materials.

Description

technical field [0001] The invention relates to a method for preparing a low-surface-energy epoxy nano-hybrid material, and prepares an epoxy nano-hybrid material with low surface energy, good transparency, high strength and excellent comprehensive performance. The invention belongs to the technical field of organic and inorganic nano composite materials. Background technique [0002] The molecular structure of epoxy resin contains more than two epoxy groups. The cured epoxy resin has good physical and chemical properties. It has excellent bonding strength to the surface of metal and non-metal materials, high temperature resistance and Good electrical insulation performance, small shrinkage, good dimensional stability, good mechanical properties, good flexibility, good chemical stability, and excellent processing technology, so it is widely used in casting, impregnation, lamination, adhesives, coatings and other purposes. In recent years, with the continuous expansion of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C08G59/20C08G59/44C08G59/42C08K3/36C08K3/22C01G23/053C01B33/12
Inventor 张海英戚嵘嵘童铭康彭霏
Owner SHANGHAI JIAO TONG UNIV
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