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A porous powder loaded with superhydrophobic particles and its preparation method and application

A porous powder and super-hydrophobic technology, applied in chemical instruments and methods, sustainable manufacturing/processing, coating, etc., can solve the problems of poor formula applicability, poor environmental stability, cumbersome process, etc., and achieve improved tensile strength, Improved mechanical performance and improved durability

Active Publication Date: 2022-06-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Technical problem to be solved: Aiming at problems such as extensive use of organic solvents, cumbersome process, poor formulation applicability, poor mechanical properties, and poor environmental stability in the preparation of superhydrophobic coatings by existing methods, the present invention provides a loaded superhydrophobic coating The porous powder of the particles and its preparation method and application, through the selection and control of the formula and process, solve the key problems in the traditional method that the film-forming material is difficult to bond with the super-hydrophobic particles, the coating is difficult to self-repair, and the long-term effect is not good. problems, significantly improved the mechanical properties and environmental stability of the coating, and showed excellent corrosion resistance, heat and humidity resistance and energy saving performance, suitable for large-scale preparation and production, and realized the real and wide application of superhydrophobic coating technology

Method used

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  • A porous powder loaded with superhydrophobic particles and its preparation method and application
  • A porous powder loaded with superhydrophobic particles and its preparation method and application
  • A porous powder loaded with superhydrophobic particles and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0040] In this example, the inorganic nanoparticles are alumina, the solvent is water, the hydrophobic modifier is Evonik Protectosil WS 670, a water-based propyloctylsiloxane oligomer, and the porous micro-particles are alumina and silica as raw materials High temperature sintered porous ceramic particles, the preparation steps are as follows, in parts by mass:

[0041] (1) 10 parts of nano-alumina sol, 5 parts of ammonia water, 1.6 parts of water-based propyl octyl siloxane oligomer Protectosil WS670 were added into 100 parts of deionized water and stirred continuously for 24h to obtain the modified nanoparticle suspension;

[0042] (2) spray drying the nanoparticle suspension prepared in step (1) under the conditions of an inlet temperature of 160-220° C., a spray air pressure of 0.3 MPa, and a water evaporation amount of 1-200 L / h to remove deionized water for 1-2 hours to obtain Nanoparticle powder;

[0043] (3) 9 parts of porous ceramic particles made by high temperatur...

Embodiment 2

[0048] In this embodiment, the inorganic nanoparticles are silica, the volatile organic solution is propylene glycol methyl ether, the water-based hydrophobic treatment agent is water-based perfluoroalkylsiloxane, and the porous micro-particles are made of silica, alumina, and zirconia. Porous ceramic particles made by high temperature sintering, the preparation steps are as follows, in parts by mass:

[0049] (1) Disperse 8 parts of nano-silica sol, 4 parts of ammonia water, and 0.5 part of water-based perfluoroalkyl siloxane in 100 parts of deionized water, and continuously stir for 24 hours to obtain a modified nanoparticle suspension;

[0050] (2) The superhydrophobic nanocoating prepared in step (1) is spray-dried for 1-2h under the conditions of inlet temperature 160-220°C, spray air pressure 0.3MPa, and water evaporation 1-200L / h to remove deionized water to obtain superhydrophobicity. Hydrophobically modified nanoparticle powder;

[0051] (3) 4 parts of porous ceramic...

Embodiment 3

[0056] Figure 5 The mechanical wear resistance of the superhydrophobic coating prepared for the porous powder loaded with superhydrophobic particles in Example 2 and the SEM image of the surface after being subjected to severe mechanical wear. Benefit from the good dispersibility of the porous powder loaded with superhydrophobic particles and the strong binding force with the binder, as well as the "armor" protection effect of the high-strength and high-temperature sintered porous ceramic particles that have been optimized through experiments and withstand harsh conditions. The release of superhydrophobic nanoparticles under mechanical damage, the superhydrophobic coating can still maintain excellent superhydrophobic properties after 2000 cycles of Taber abrasion (1kg load).

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Abstract

A porous powder loaded with super-hydrophobic particles and its preparation method and application, dispersing nano-sol, ammonia water and water-based hydrophobic treatment agent in deionized water to prepare a modified nano-particle suspension, and obtaining super-hydrophobic by spray drying Modified nanoparticle powder; add porous micron ceramic powder and water-based silane coupling agent to deionized water, then add superhydrophobic modified nanoparticle powder, and continuously stir to prepare a porous particle suspension loaded with superhydrophobic particles. The porous powder loaded with superhydrophobic particles is obtained by filtration drying or spray drying. The preparation method of the invention has low requirements on substrate material and shape, simple equipment, easy operation, low cost, and large-scale construction, which will bring revolutionary changes to the fields of architectural coatings, anti-corrosion coatings, industrial coatings, functional coatings and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional coating materials, and in particular relates to a porous powder loaded with superhydrophobic particles and a preparation method and application thereof. Background technique [0002] A superhydrophobic surface refers to a solid surface on which water droplets can roll off under the action of microdynamics under the combined action of surface micro-nanostructures and low surface energy substances. It has excellent comprehensive properties such as anti-corrosion and corrosion resistance, and can be widely used in industrial fields such as three-proof of fabrics, anti-dew and anti-frost of air conditioners, anti-bacterial and anti-mildew of building materials, oil-water separation, anti-bioadhesion interface and water collection system. However, under the action of mechanical external forces such as abrasion and impact, and external environments such as dew and frost, the most criti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/62
CPCC09D7/62C09D7/70Y02P20/10C09D163/00C08K9/02C09C3/12C09C1/3081C01P2004/64C09C1/407C09C1/3684C01P2006/12C01P2006/16C01P2006/14C09D5/033C09D5/1681C09D5/448C08K3/22C09D7/65C09D7/20C09D7/45C01P2004/32C01P2004/62C09C1/0087C09C3/006C09C3/043C09D5/4457
Inventor 张友法张宇顾万诚余新泉
Owner SOUTHEAST UNIV
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