Halloysite antibacterial water-based paint, and preparation method and application thereof

A water-based paint and halloysite technology, applied in the field of paint, can solve the problems of weakened protection, complex process and high cost, and achieve the effects of high load, simple operation and low cost

Inactive Publication Date: 2017-06-23
广州润沃材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common physical blending method will cause volatilization and migration under the influence of the environment in which the coating film is used, resulting in weakened protection
However, the chemical bonding method has disadvantages such as complex process and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Take by weighing 1g chitosan and be configured into an aqueous solution with a concentration of 1%, add 20g halloysite powder, and stir mechanically at 500 rpm for 60min;

[0040] (2) The mixture solution in step (1) is subjected to vacuum negative pressure 5 times, and the antibacterial agent is adsorbed to the inner and outer walls of the halloysite tube;

[0041] (3) Centrifuge at 5000 rpm for 10 minutes, pour off the supernatant, wash with pure water for 3 times and centrifuge, then take out the lower sediment, dry at 50°C for 12 hours, and obtain halloysite powder loaded with chitosan;

[0042] (4) The water-based acrylic resin coating (DSM NeoCryl XK-258) and the halloysite powder loaded with chitosan were mechanically stirred and mixed at 300 rpm for 30 min according to the mass ratio of 100:5.

[0043] (5) Spray the above-mentioned coating on the aluminum sheet and dry it at 25°C for 24 hours to coat the antibacterial coating.

[0044] (6) The above sample ...

Embodiment 2

[0046] (1) Take by weighing 0.5g chitosan quaternary ammonium salt and configure it into an aqueous solution of 5% concentration, add 20g halloysite powder, and stir mechanically at 800 rpm for 30min;

[0047] (2) The mixture solution in step (1) is subjected to vacuum negative pressure 6 times, and the antibacterial agent is adsorbed to the inner and outer walls of the halloysite tube;

[0048](3) Centrifuge at 8000 rpm for 5 minutes, pour off the supernatant, wash with pure water for 3 times and centrifuge, then take out the lower sediment, dry at 40°C for 16 hours, and obtain halloysite powder loaded with antibacterial agent;

[0049] (4) The water-based acrylic paint resin paint (Nuplex Setaque 6716) and the halloysite powder loaded with antibacterial agent were mechanically stirred and mixed at 500 rpm for 20 minutes according to the mass ratio of 100:10.

[0050] (5) Spray the above-mentioned coating on the wood and dry it at 50°C for 40h to coat the antibacterial coatin...

Embodiment 3

[0053] (1) Weigh 10 g of chitosan oligosaccharide to be configured into an 8% aqueous solution, add 20 g of halloysite powder, and ultrasonically disperse for 60 min;

[0054] (2) The mixture solution in step (1) is subjected to vacuum negative pressure 6 times, and the antibacterial agent is adsorbed to the inner and outer walls of the halloysite tube;

[0055] (3) Centrifuge at 6000 rpm for 12 minutes, pour off the supernatant, wash with pure water for 3 times and centrifuge, then take out the lower sediment, dry at 80°C for 4 hours, and obtain the halloysite powder loaded with antibacterial agent;

[0056] (4) Water-based acrylic paint resin paint ( 4400, Wanhua Chemical Group Co., Ltd.) and the halloysite powder loaded with antibacterial agent were mixed mechanically at 300 rpm for 40 min at a mass ratio of 100:8.

[0057] (5) Spray the above coating on the stainless steel and dry it at 40°C for 5 hours to reach the antibacterial coating.

[0058] (6) The above sample w...

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Abstract

The invention belongs to the technical field of paints, and discloses a halloysite antibacterial water-based paint, and a preparation method and application thereof. The preparation method comprises the following steps: carrying out vacuum treatment on a halloysite-chitosan antibacterial agent mixed water solution, separating, and drying to obtain antibacterial-agent-carried halloysite powder; and mixing the antibacterial-agent-carried halloysite powder with a water-based acrylic resin paint to obtain the halloysite antibacterial water-based paint. By utilizing the cavity structure of the halloysite nanotubes, the antibacterial agent molecules are carried onto the halloysite through the molecular adsorption and vacuum processes, and are further mixed with the acrylic resin paint to obtain the long-acting antibacterial-function acrylic resin paint with improved mechanical properties. The halloysite nanotubes are utilized to carry and slowly release the antibacterial agent, thereby implementing the compatibility of the chitosan and other antibacterial agents in the acrylic resin paint, and displaying the excellent antibacterial effect. The system is water-based and environment-friendly, and can be widely used in various fields.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a halloysite antibacterial water-based coating and a preparation method and application thereof. Background technique [0002] High-performance antibacterial coatings can not only protect the base material of conventional coatings, but also prevent bacteria and mildew on the surface of the base material, so it is widely used in ship antifouling, architectural decoration, furniture, electronic products and toys , by the attention of research and development in various countries. Antibacterial agents can be divided into natural antibacterial agents, inorganic antibacterial agents, organic antibacterial agents and compound antibacterial agents according to their ingredients and sources. The special requirements of antibacterial coatings are long-acting, broad-spectrum, safe and non-toxic, color stability, and low price. However, the existing antibacterial coatings cannot meet the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D5/14C09D7/12
CPCC09D133/00C08K7/26C08K9/12C09D5/14C09D7/70
Inventor 封欣刘明贤
Owner 广州润沃材料科技有限公司
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