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Durable superhydrophobic coating

A coating composition and pre-coating technology, applied in the direction of coating, paper coating, water repellent addition, etc., can solve the problems of poor mechanical properties of the coating, reduction of superhydrophobicity, weak interaction, etc.

Inactive Publication Date: 2020-11-10
阿兹拉SHS股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the interaction is weak, nanostructured coatings can be removed under abrasion, reducing superhydrophobicity and resulting in poor mechanical properties of the coating

Method used

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  • Durable superhydrophobic coating
  • Durable superhydrophobic coating
  • Durable superhydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] raw material

[0083] Five thermosetting substrates were investigated as primers, including epoxy resin (Araldite 2020 from Huntsman Advanced Materials Europe BVBA), urethane acrylate (UA) (NOA61 from Norland Products Incorporated), silicone acrylate (silicon acrylate, SiliXan GmbH of Ml 50), silicone-RTV (Si-RTV, Sigma-Aldrich 184) and polyurethane (PU) based coatings (TambourIsrael). Using 2,2-dimethoxy-2-phenylacetophenone (DMPA of Sigma-Aldrich) as photoinitiator, benzoyl peroxide (BPO, Sigma-Aldrich A75) As free radical initiator, hydrophobic (alkyl-treated) fumed silica (CAB-O-SIL TS720, Cabot Corporation, Boston, MA). Technical grade reagents acetone and isopropanol (IPA) (Sigma-Aldrich) were also used as described below. A variety of substrates were included in the study, including polycarbonate (PC), glass slides, aluminum (aluminum alloy type 2024) and borosilicate glass microscope slides (McMaster-Carr, 2.2cm x 7cm wide long).

[0084] Preparation of...

Embodiment 2

[0126] As detailed below, SH surfaces comprising substrates coated in two coats were prepared by spraying (four sprays in longitudinal and transverse directions with a two-minute interval between each spray) and / or dipping (for two minutes), each The average applied thickness of each coating was between about 3.5-4.5 μm. The substrate used was a glass substrate (cleaned properly with acetone prior to coating application). The first layer coated on the glass substrate was a primer layer to provide adhesion to the substrate (five thermoset substrates were studied as primers, as described below), the second layer was a layer containing NPs, That is, the coating composition of the present invention. Free radicals are obtained by heating when the coating composition contains RHI (in this example BPO-benzoyl peroxide), or by light irradiation when the coating composition contains RPI, as described below . All treated samples were kept at room temperature (RT) for 24 hours prior t...

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Abstract

Disclosed is a superhydrophobic coating composition comprising an NP component, and a radical initiator (RI), wherein the NP component comprises NP particles having organic moieties bound to the surface of the NP particles. Disclosed also is a superhydrophobic coating composition further comprising a fluid. Disclosed also is a method for preparing a superhydrophobic (SH) surface, wherein the method comprises: mixing an NP component with at least one RI and possibly with a fluid, thereby providing a coating composition; applying the coating composition onto a substrate (pre -coated or containing oxides) thereby providing a coated substrate; and applying radiation to the coated substrate, thereby providing the SH surface on which at least part of the NP component is covalently bound, directly or indirectly, to the substrate.

Description

technical field [0001] The present invention relates to a durable transparent opaque coating. In particular, the present invention relates to durable superhydrophobic coatings based on free radical chemistry of surface-treated nanoparticles, wherein the nanoparticles are covalently bound to any type of surface by free radical-induced covalent bonds. Background technique [0002] Superhydrophobic (SH) surfaces can be obtained by tuning chemistry and morphology, biomimetic, such as imitating lotus leaves. SH surface coatings are widely used in commercial and industrial applications due to their unique features including self-cleaning effect, anti-corrosion, reduced ice adhesion, anti-icing and low hydrodynamic friction. SH surfaces can also be used as templates for directed self-assembly of nanomaterials and MEMS. Applications of such surfaces involve automotive, architectural, agricultural, optical, military and aerospace systems. [0003] The durability of SH coatings is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/00B05D3/06B05D5/02C08K3/22C08L83/00D06M11/38D21H21/16
CPCB05D3/06D21H21/16B05D5/08B05D2504/00B05D2503/00D21H19/42D21H19/40D21H21/52D21H17/74C08G77/20C08K2201/011C08K3/40C08K3/34C08K2003/2241C08K3/14C08K2003/385C08K3/36C08K9/04B05D2518/10B05D1/02B05D1/18B05D2420/01B05D2425/01B05D2320/00B05D2401/10B05D3/0254B05D3/067B05D2203/35B05D7/536B05D1/38B05D2502/005B05D2601/22B05D3/00B05D5/02C08K3/22C09D133/00C09D7/61C09D7/67C09D5/00C09D183/04
Inventor 汉娜·多迪克-肯尼安娜·多塔尼福·科恩史密尔·肯尼
Owner 阿兹拉SHS股份有限公司
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