Reversible self-repair antibacterial acrylic coating and preparation and self-repair methods

A self-healing, acrylic technology, applied in coatings, antifouling/underwater coatings, paints containing biocides, etc. Good performance, good manufacturability and environmental protection characteristics, the effect of less chain entanglement

Active Publication Date: 2017-07-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as mentioned above, the antibacterial performance of quaternary ammonium salts will decrease significantly with time, and the hydrogel film has limited mechanical strength, which is not suitable for indoor applications such as home decoration, medical facilities, food / drug production, etc.

Method used

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  • Reversible self-repair antibacterial acrylic coating and preparation and self-repair methods
  • Reversible self-repair antibacterial acrylic coating and preparation and self-repair methods
  • Reversible self-repair antibacterial acrylic coating and preparation and self-repair methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Preparation of hyperbranched polysiloxane (referred to as HPSi) containing amino groups at the end

[0040] Under nitrogen protection, 44.0g of γ-aminopropyltriethoxysilane (KH550) and 4.3g of water were dissolved in 40.0mL of ethanol and reacted at 60°C for 4h. After the obtained solution was cooled to room temperature, the alcohol solvent was distilled off to obtain a colorless liquid, i.e. hyperbranched polysiloxane (HPSi) containing amino groups at the end. For its hydrogen NMR spectrum and silicon NMR spectrum, please refer to the attached figure 1 and 2 .

[0041] 2) Preparation of sulfonyl betaine methacrylate

[0042] At room temperature, dissolve 15.7g of 2-(dimethylamino)ethyl methacrylate and 12.2g of 1,3-propane sultone in 100mL of 1,2-dichloroethane and stir evenly, then raise the temperature to 60°C and continue the reaction for 3h . The resulting mixed solution was cooled to room temperature and then filtered to obtain a white powder, i.e. sulfonyl...

Embodiment 2

[0063] 1) Preparation of hyperbranched polysiloxane (referred to as HPSi) containing amino groups at the end

[0064] Under the protection of argon, 44.0g of γ-aminopropyltriethoxysilane (KH550) and 4.3g of water were dissolved in 40.0mL of ethanol and reacted at 60°C for 4h. After the resulting solution was cooled to room temperature, the alcohol solvent was distilled off to obtain a colorless liquid, namely hyperbranched polysiloxane (HPSi) containing amino groups at the end.

[0065] 2) Preparation of sulfonyl betaine methacrylate

[0066] At room temperature, dissolve 15.7g of 2-(dimethylamino)ethyl methacrylate and 13.4g of 1,3-propane sultone in 100mL of 1,2-dichloroethane and stir evenly, then raise the temperature to 60°C and continue the reaction for 3h . The resulting mixture was cooled to room temperature and then filtered to obtain a white powder, namely sulfonyl betaine methacrylate.

[0067] 3) Preparation of linear acrylic resin containing sulfonyl betaine

...

Embodiment 3

[0075] 1) Preparation of hyperbranched polysiloxane (referred to as HPSi) containing amino groups at the end

[0076] Under the protection of a mixed gas of nitrogen and argon, 44.0g of γ-aminopropyltriethoxysilane (KH550) and 4.3g of water were dissolved in 40.0mL of ethanol and reacted at 60°C for 4h. After the resulting solution was cooled to room temperature, the alcohol solvent was distilled off to obtain a colorless liquid, namely hyperbranched polysiloxane (HPSi) containing amino groups at the end.

[0077] 2) Preparation of sulfonyl betaine methacrylate

[0078] At room temperature, dissolve 15.7g of 2-(dimethylamino)ethyl methacrylate and 15.0g of 1,3-propane sultone in 100mL of 1,2-dichloroethane and stir evenly, then raise the temperature to 60°C and continue the reaction for 3h . The resulting mixture was cooled to room temperature and then filtered to obtain a white powder, namely sulfonyl betaine methacrylate.

[0079] 3) Preparation of linear acrylic resin co...

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Abstract

The invention discloses a reversible self-repair antibacterial acrylic coating and preparation and self-repair methods. The preparation method comprises the steps of adding methyl methacrylate, butyl acrylate, sulfonyl betaine methacrylate and acetoacetoxy methacrylate gylcol ester into an alcohol solvent, and performing free radical polymerization under the initiation of azodiisobutyronitrile to obtain linear acrylic resin; and dissolving the linear acrylic resin and amino-containing hyperbranched polysiloxane into the alcohol solvent, coating the surface of a base material, and drying, thus obtaining the reversible self-repair antibacterial acrylic coating. Efficient and mild repair of the coating is realized by using the characteristic of reversible reaction of vinylogous urethane bonds at room temperature and amino rich at the terminal of the hyperbranched polysiloxane, and the acrylic coating is endowed with excellent antibacterial property by the safe, nontoxic and non-specific sulfonyl betaine. The product has good applicability and strong practicability; the preparation method has the characteristics of wide raw material source, simple process and environment friendliness.

Description

technical field [0001] The invention relates to a polymer coating and a preparation method thereof, in particular to a reversible self-repairing antibacterial acrylic coating, its preparation and its self-repairing method, and belongs to the technical field of polymer materials. Background technique [0002] Surface microbial adsorption and the resulting biofilm pollution have posed a huge threat to the safety and hygiene of indoor occasions such as home decoration, medical facilities, and food / drug production. Usually, the initial stage of biofilm formation is the non-specific reversible adsorption of bacteria on the surface of the substrate. Once the bacteria adsorb to form exopolysaccharides and form a three-dimensional structure, the biofilm is difficult to remove. If the surface of the substrate is covered with an antibacterial coating, the adsorption of bacteria can be inhibited at the initial stage, and the formation of biofilm can be effectively prevented from the ro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D183/08C09D5/14C08F220/18C08F220/14C08F220/38C08F222/14C08G77/26
CPCC08F220/18C08F220/1804C08G77/26C09D5/14C09D133/08C08L83/08C08F220/14C08F220/385C08F222/102
Inventor 梁国正张又豪顾嫒娟袁莉
Owner SUZHOU UNIV
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