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Precursor for superhydrophobic composite material coating and preparation method thereof

A composite material and superhydrophobic technology, which is applied in the field of superhydrophobic composite material coating precursor and its preparation, can solve the problems of poor durability and weak interface interaction of superhydrophobic coatings, and achieve outstanding impact resistance and strong interaction , the effect of restoring superhydrophobic properties

Active Publication Date: 2022-06-21
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of poor durability of the superhydrophobic coating caused by the weak interaction between the existing inorganic particles and the particle / binder interface, and hybridizes a structure-stabilized multi-level nanoparticle with strong interaction between particles. Combining micron-sized particles with epoxy system adhesives to prepare a composite superhydrophobic coating with micro / nano-scale surface structure

Method used

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  • Precursor for superhydrophobic composite material coating and preparation method thereof
  • Precursor for superhydrophobic composite material coating and preparation method thereof
  • Precursor for superhydrophobic composite material coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Under stirring conditions, 1.0 g of ACNTB particles were added to the mixed solution of 9.1 g of ammonia water and 110 g of ethanol. After stirring for 10 min, a mixed solution of 9.35 g of TEOS and 40 g of ethanol was added dropwise, heated in a water bath at 60 °C, and 2.5 g of ethanol was added after stirring for 18 h. g of KH570, continue to stir for 6h, the reaction ends, cool to room temperature naturally, the obtained suspension is washed with ethanol and centrifuged three times, and ACNTB-SiO is collected 2 -KH570 particles, then after drying in a vacuum oven at 60 °C for 12 h to obtain black ACNTB-SiO 2 -KH570 granules.

[0036] figure 1 are ACNTB, ACNTB-SiO in Example 1 of the present invention 2 -KH570 Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) photographs. from figure 1 It can be seen in a, 1a' and 1c that the CNTs in ACNTB have a certain orientation arrangement, and there are obvious entanglements between CNTs. In addi...

Embodiment 2

[0056] Under stirring conditions, 1.0 g of ACNTB particles were added to the mixed solution of 9.1 g of ammonia water and 110 g of ethanol. After stirring for 10 min, a mixed solution of 9.35 g of TEOS and 40 g of ethanol was added dropwise, heated in a water bath at 60 °C, stirred at a constant speed for 18 h, and then added with 2.5 g of ethanol. g of KH570, continue to stir for 6h, the reaction ends, cool to room temperature naturally, the obtained suspension is washed with ethanol and centrifuged three times, and ACNTB-SiO is collected 2 -KH570 particles, then after drying in a vacuum oven at 60 °C for 12 h to obtain black ACNTB-SiO 2 -KH570 granules.

[0057] At 30°C, 2g epoxy resin (E-51), 0.02g ACNTB-SiO 2 -KH570, 0.6g DGETPDMS (colorless and transparent liquid, viscosity (25°C) 5000 mPa.s, specific gravity (25°C) 1.08), 0.88g HBPSi are mixed uniformly and maintained for 10 minutes to obtain a resin adhesive prepolymer, and then the adhesive The prepolymer was uniform...

Embodiment 3

[0070] Under stirring conditions, 2.0 g of ACNTB particles were added to the mixed solution of 12 g of ammonia water and 150 g of ethanol. After stirring for 10 min, the mixed solution of 14 g of TEOS and 50 g of ethanol was added dropwise, heated in a water bath at 60 °C, and 5 g of ethanol was added after stirring for 36 h. Vinyltriethoxysilane (VTES), after stirring for 6 hours, the reaction was completed, and the suspension was naturally cooled to room temperature. The obtained suspension was washed with ethanol and centrifuged three times to collect ACNTB-SiO 2 -VTES particles, then dried in a vacuum oven at 60 °C for 12 h to obtain black ACNTB-SiO 2 -VTES particles.

[0071] At 80°C, 2g epoxy resin (E-44) and 0.6g HBPSi were mixed uniformly and maintained for 20min to obtain a resin adhesive prepolymer, and then the adhesive prepolymer was uniformly scraped on the surface of the aluminum plate substrate (adhesive prepolymer layer thickness of 70 μm), when the prepolymer...

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Abstract

The invention discloses a precursor for super-hydrophobic composite material coating and a preparation method thereof, in parts by weight, ACNTB-SiO 2 ‑Coupling agent suspension coated on ACNTB‑SiO 2 ‑Coupling agent, epoxy resin, diglycidyl ether-terminated polydimethylsiloxane, gel surface of amino-terminated hyperbranched polysiloxane mixture, volatilize solvent to obtain superhydrophobic composite material coating precursor body; and then cured to obtain a durable super-hydrophobic composite coating, which has the characteristics of easy operation, durability and good hydrophobicity, and the prepared coating has excellent mechanical properties and wear resistance. In particular, the hydrophobic nano-SiO of the present invention 2 The particles are stored in the pores of ACNTB, and when the coating structure is destroyed, the adhesive is decomposed by pyrolysis, and the gas products formed can promote SiO 2 Migrating to the surface of the coating and constructing a new nanostructured surface with the exposed CNTs can restore the superhydrophobic properties of the coating.

Description

technical field [0001] The invention relates to a precursor for a super-hydrophobic composite material coating and a preparation method thereof, which can prepare a super-hydrophobic composite material coating with a micro / nano-structured surface with excellent impact resistance, friction resistance and self-healing functions. Background technique [0002] In order to improve the stability of the superhydrophobic coating, the interaction between the nanoparticles and the binder can be improved by modifying the inorganic nanoparticles. At present, fluorinated alkyl chains are used to modify inorganic nanoparticles, but fluorine-containing materials will be stored in the environment for a long time, and their potential toxicity is very harmful to the human body and the environment, and the high price of fluorine-containing materials will limit It is widely used in real life, so it has positive significance to prepare economical and durable fluorine-free superhydrophobic coatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/06C08L63/00C08L83/08C08K9/06C08K3/36C08K3/04
CPCC08J7/06C08L63/00C08J2363/00C08K2201/003C08K2201/004C08K2201/011C08L83/08C08K9/06C08K3/36C08K3/041C09D5/1681C09D163/00C09D7/62C09D7/70C08G77/26C09D7/61C09D183/08C09D183/06
Inventor 袁莉王泽浩顾嫒娟梁国正
Owner SUZHOU UNIV
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