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Preparation method of graphene/polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion

A hyperbranched polyurethane and polyacrylate technology, which is applied in the field of polymer materials, can solve the problems of weak force and low force interaction, etc., and achieve the effects of increased hydrophobicity, improved mechanical properties, and easy processing and molding

Active Publication Date: 2017-02-22
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN104059395A provides a kind of perylene anhydride as raw material to prepare perylene imide polyurethane liquid crystal, and then adopt non-covalent method to modify graphene, which can finally realize uniform dispersion in resin matrix, but the effect of non-covalent method Forces are often lower than those obtained by covalent means such as grafting modification
Chinese patent CN104761882A physically blends the prepared graphene oxide aqueous dispersion with water-soluble polyurethane to obtain a graphene / polyurethane composite material, which is also bonded in a non-covalent manner, and the force is not strong

Method used

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  • Preparation method of graphene/polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion
  • Preparation method of graphene/polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion
  • Preparation method of graphene/polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion

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Embodiment 1

[0048] 1. Preparation of graphene oxide GO: under ice-water bath cooling, graphite powder (3g), sodium nitrate (1g), concentrated sulfuric acid (75mL) were mixed and stirred for 1min, and potassium permanganate (9g) was slowly added step by step, about After 1.5h, the stirring was continued for 1h, and the temperature was kept at 30-40°C for 2d. Slowly add 150 mL of deionized water for dilution, add 450 mL of water and continue to stir, then slowly add 20 mL of 30% hydrogen peroxide solution dropwise, add 200 mL of 1 mol / L dilute hydrochloric acid solution after fully stirring for washing, let stand, and precipitate. After removing the supernatant, use a large amount of deionized water for repeated washing, centrifugation, and precipitation until the solution is weakly acidic (pH ≈ 5~7), ultrasonically stripped for more than 4 hours using a high-power ultrasonic scrubber, and centrifuged at a high speed of 12000r / min. , and take the supernatant, the GO dispersion. For further...

Embodiment 2

[0060] 1. Preparation of graphene oxide GO: under ice-water bath cooling, graphite powder (3g), sodium nitrate (1g), concentrated sulfuric acid (75mL) were mixed and stirred for 1min, and potassium permanganate (9g) was slowly added step by step, about After 1.5h, the stirring was continued for 1h, and the temperature was kept at 30-40°C for 2d. Slowly add 150 mL of deionized water for dilution, add 450 mL of water and continue to stir, then slowly add 20 mL of 30% hydrogen peroxide solution dropwise, add 200 mL of 1 mol / L dilute hydrochloric acid solution after fully stirring for washing, let stand, and precipitate. After removing the supernatant, use a large amount of deionized water for repeated washing, centrifugation, and precipitation until the solution is weakly acidic (pH ≈ 5~7), ultrasonically stripped for more than 4 hours using a high-power ultrasonic scrubber, and centrifuged at a high speed of 12000r / min. , and take the supernatant, the GO dispersion. For further...

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Abstract

The invention discloses a preparation method of a graphene / polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion. The method comprises the following steps: preparing graphene oxide (GO) by an improved Hummers method, modifying the GO by ethanediamine, enabling reaction with butyl acrylate to introduce double bonds to obtain MGO (ethylenediamined graphene oxide), and performing solution polymerization on the MGO and an acrylic ester monomer in DMF to prepare an MGO / PA solution; and grafting a partial double-bond end-sealed hydroxyl silicone oil modified linear polyurethane prepolymer, which is prepared by in-situ polymerization, on the periphery of a polyhydroxyl hydrophilic hyperbranched polyurethane core by diisocyanate, an oligomer dihydric alcohol and a chain extender and by a hyperbranched polymer chain extending method, mixing with the MGO / PA, and performing polycondensation and crosslinkage to obtain aminated graphene oxide / polyacrylic ester-silicon-containing hyperbranched polyurethane quaternary composite emulsion.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a preparation method of a graphene / polyacrylate-silicon-containing hyperbranched water-based polyurethane multi-component composite emulsion. Background technique [0002] Polyurethane (PU) materials have excellent comprehensive properties and are widely used in plastics, rubber, coatings, adhesives, fabric finishing agents and biomedical materials. In view of the fact that the development direction of the coatings industry tends to follow the "three prerequisites" (resources, energy, and pollution-free) and the "four E principles" (economy, efficiency, ecology, and energy), the development of more polyurethane materials is gradually changing. For the water-based product, the compounding of the components and the functionalization of the application. Corresponding to the increasingly strengthened environmental protection requirements of the times, water-bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L51/10C08G18/75C08G18/66C08G18/61C08G18/48C08G18/34C08K9/04C08K3/04C08F292/00C08F220/14C08F220/18C08F220/28
CPCC08F292/00C08G18/348C08G18/48C08G18/61C08G18/6692C08G18/755C08K3/04C08K9/04C08L51/10C08L75/08C08F220/281C08F220/1804
Inventor 杨建军吴庆云张建安吴明元闰彦玲
Owner ANHUI UNIVERSITY
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