Preparation method of self-repairing transparent antibacterial coating

An antibacterial coating and self-healing technology, which is applied in the directions of coatings, devices for coating liquid on surfaces, etc., to achieve the effects of good antibacterial effect, high practical value and simple preparation method

Inactive Publication Date: 2012-08-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method of self-repairing transparent antibacterial coating
  • Preparation method of self-repairing transparent antibacterial coating
  • Preparation method of self-repairing transparent antibacterial coating

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1: the preparation of transparent PAH / HA coating

[0043] Soak the treated quartz substrate in PAH (2mg / mL, pH=10) aqueous solution for 15 minutes, take out the substrate and wash with water, then soak in HA (2mg / mL, pH=3) aqueous solution for 15 minutes, take out the substrate and wash with water . Wherein, the pH values ​​of the PAH and HA aqueous solutions are adjusted by using a 1 mol / L aqueous hydrochloric acid solution and a 1 mol / L sodium hydroxide aqueous solution.

[0044] Repeat the above steps 30.5 times (that is, the last layer is the PAH layer) to obtain a transparent PAH / HA coating. figure 1 It is the relationship curve of the change of coating thickness with the number of deposition cycles tracked and monitored by scanning electron microscopy. It shows that the growth of the coating shows a typical exponential growth pattern, that is, the thickness of the coating increases rapidly as the number of deposition cycles increases. The thickness o...

Embodiment 2

[0045] Embodiment 2: the preparation of transparent antibacterial coating

[0046] (PAH / HA)*30.5 coating prepared as a protective coating on the surface of public display equipment must face various bacteria and viruses, so triclosan molecules with broad-spectrum antibacterial effects were selected as antibacterial agents and introduced (PAH / HA)*30.5 coating. Triclosan molecules are hydrophobic molecules, and it is difficult to directly introduce them into the hydrophilic (PAH / HA)*30.5 coating by ordinary methods, so the method of surfactant micelle coating is used to introduce hydrophobic triclosan molecules (PAH / HA) * 30.5 coating.

[0047] In this example, first add 0.2 mL of triclosan in dichloromethane (0.15 mol / L) dropwise to 40 mL of SDS in water (0.1 mol / L), and sonicate for 1 hour. Triclosan molecules will be encapsulated in the hydrophobic cavity of SDS micelles due to hydrophobic interactions. Then the (PAH / HA)*30.5 coating is immersed in the SDS micelles soluti...

Embodiment 3

[0048] Embodiment 3: the antibacterial ability of transparent antibacterial coating

[0049] Sustained release of antimicrobial agents from the coating can effectively inhibit the growth of bacteria and maintain human health, so long-term release of antimicrobial agents is very necessary. The release profile of triclosan molecules loaded in (PAH / HA)*30.5 coating in water is shown as image 3 shown. Triclosan molecules will be continuously released in water. In the first 12 hours, the release rate of triclosan molecules is relatively fast, which is a typical release kinetics affected by diffusion. In the subsequent release, the release rate of triclosan molecules in water slowed down, and the entire release process could last for as long as 20 days. In the actual application of the transparent antibacterial coating, it is generally in an air environment with a certain relative humidity, so it can guarantee the antibacterial effect for a longer period of time, and can fully me...

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Abstract

The invention belongs to the technical field of the preparation of self-repairing transparent antibacterial coatings and particularly relates to a method for preparing a transparent antibacterial coating with self-repairing capability by using a layer-by-layer assembly technology. The prepared coating can well inhibit Gram-positive and Gram-negative bacteria, has high transmittance in a visible region and can be simply repaired by immersing the coating in the water or spraying water on the coating due to the declined coating transparency by mechanical damage. By using the repairing method, the transparency of the coating firstly realizes complete self-repairing in the same region for many times. The preparation method of the self-repairing transparent antibacterial coating is simple with non-toxic and harmless raw materials used in the method, thus probably making some contribution to the researches with respect to material science, surface chemistry and the like; in addition, the self-repairing transparent antibacterial coating is expected to be widely used in the fields such as a touch human-computer interface (such as a touch display screen).

Description

technical field [0001] The invention belongs to the technical field of self-repairing transparent antibacterial coating preparation, and in particular relates to a method for preparing a transparent antibacterial coating with self-repairing ability by using layer-by-layer assembly technology. Background technique [0002] The self-healing function can effectively prolong the service life of materials, reduce the cost of repeated production and maintenance, and improve the safety of material functions (Annu. Rev. Mater. Res. 2010, 40, 179-211). Most self-healing materials can only repair their mechanical properties or their protective effects (Small 2007, 3, 926-943), and only a few materials can repair their own functions, such as: self-healing of superhydrophobic properties of coatings (Angew.Chem .Int.Ed.2010, 49, 6129-6133) and self-healing of conductive properties of materials (Adv.Mater.2012, 24, 398-401), etc. Transparent protective coatings generally require good tra...

Claims

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Application Information

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IPC IPC(8): B05D1/18B05D1/38B05C11/10
Inventor 孙俊奇王旭
Owner JILIN UNIV
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