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All-state super-lyophilic coating as well as preparation method and application thereof

A technology for coatings and raw materials, applied in the field of full-state super-lyophilic coatings and their preparation, achieves the effects of excellent hand feel, environmental friendliness, and simple preparation method

Active Publication Date: 2021-12-03
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the difference in hydrophilicity and lipophilicity, the hydrophilic-lipophilic substrate in the air generally behaves as any state of underwater oleophobic (and hydrophilic under the oil) or underwater lipophilic (and hydrophobic under the oil). After the material is specially treated, there will be a metastable state of oleophobic under water and hydrophobic under oil at the same time, and there is no surfactant that is both hydrophilic and oleophilic in the air, oleophilic under water, and hydrophilic under oil. Related reports

Method used

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  • All-state super-lyophilic coating as well as preparation method and application thereof
  • All-state super-lyophilic coating as well as preparation method and application thereof
  • All-state super-lyophilic coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]At room temperature, dissolve 1g of Dolphin-1352 water-based polyurethane (Guangzhou Dolphin New Material Co., Ltd.) and 0.05g of isocyanate ZS-2601 (Guangzhou Zengmao Chemical Technology Co., Ltd.) Temperature 20, mix uniformly, obtain the mixed aqueous solution of 1wt% polyurethane, 0.05wt% isocyanate and 1wt% Tween 20.

[0042] Drop 10 μL of water, dichloroethane, and simethicone directly on the surface of polyester. The wetting state diagram of untreated polyester is shown in figure 1 . In the air, 10 μL water droplets spread on the surface of pure polyester for 30 minutes; polyester is hydrophobic in dimethyl silicone oil, and the contact angle of water is ~135°; dichloroethane spreads rapidly in the air and underwater within 5 seconds; When the spreading time of methyl silicone oil is 45s, the order of lyophilicity of untreated polyester is: dichloroethane > dimethyl silicone oil > water.

[0043] Put the polyester into the above-mentioned mixed aqueous solution,...

Embodiment 2

[0045] At room temperature, dissolve 0.5g of Dolphin-1486R self-crosslinking water-based polyurethane (Guangzhou Dolphin New Material Co., Ltd.) in 100mL of water, stir well, add 0.8g of surfactant Tween 80, and mix well to obtain 0.5wt% polyurethane and a mixed aqueous solution of 0.8wt% Tween 80. Put the polyester into the above-mentioned mixed aqueous solution, soak it for 5 minutes, take it out, and put it in a 130°C oven for curing for 30 minutes to obtain the treated polyester. In the air, drop 10 μL of water droplets and dichloroethane on the surface of the treated polyester, the water droplets and dichloroethane spread rapidly within 5 seconds, and the contact angle becomes 0; in water, drop 10 μL of dichloroethane to the surface, dichloroethane Ethane spreads completely in 7s; in simethicone, drop 10μL of water to the surface, and the water droplet spreads completely in 1-2min.

Embodiment 3

[0047] At room temperature, dissolve 0.5g of Dolphin-1486R self-crosslinking waterborne polyurethane (Guangzhou Dolphin New Material Co., Ltd.) in 100mL of water, add 0.8g of surfactant Tween 80, mix well and then add 1g of 100nm SiO 2 powder and 1g of 200nm SiO 2 Powder, heated at 40°C with ultrasound to disperse the solution evenly, and obtained 0.5wt% polyurethane, 0.8wt% Tween 80 and 2wt% SiO 2 mixed aqueous solution. Put the polyester into the above-mentioned mixed aqueous solution, soak it for 5 minutes, take it out, put it in a 130°C oven for curing for 30 minutes, and obtain the treated polyester. The wetting state diagram of the treated polyester in this example is shown in image 3 . In the air, drop 10 μL of water droplets and dichloroethane on the treated polyester surface, and the water droplets and dichloroethane spread rapidly; in water, drop 10 μL of dichloroethane on the surface, and the dichloroethane spreads completely in 3 seconds; In methyl silicone oil...

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Abstract

The invention discloses an all-state super-lyophilic coating as well as a preparation method and application thereof, and belongs to the technical field of coatings. The all-state super-lyophilic coating comprises the following raw material components in percentage by weight: 0.5%-5% of a polymer, 0-2% of non-polar powder, 0.5%-10% of a surfactant and the balance of water or an organic solvent. The coating can change surface energy of a base material, so that the lyophilic capacity is changed, the lipophilicity of the base material before treatment is higher than (or less than) the hydrophilicity, the hydrophilic capacity of the base material after treatment is higher than that of part of oil and lower than that of the other part of oil, and a hydrophilic and oleophylic effect in air and liquid is presented.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a full-state super-lyophilic coating and its preparation method and application. Background technique [0002] Wettability is an inherent basic property of a solid surface, which represents the ability or tendency of a fluid to spread on a solid surface. Wettability is a relative concept. It does not only exist in two states of wetting and non-wetting, but There are differences in the degree of wetting, which is mainly affected by the surface properties of the substrate, and the contact angle θ is generally used as the evaluation standard. Generally, the contact angle of 65° is used as the dividing line between wetting and non-wetting of the substrate. θ less than 65° means the substrate is lyophilic, the smaller θ is, the better the wettability, and θ less than 10° means the substrate is super lyophilic. [0003] The wetting state of the substrate is not constant, and the wet...

Claims

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Application Information

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IPC IPC(8): D06M15/564D06M11/79D06M101/32
CPCD06M15/564D06M11/79D06M2101/32Y02A20/204
Inventor 周华王庆牛海涛
Owner QINGDAO UNIV