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Porous powder loaded with super-hydrophobic particles as well as preparation method and application of porous powder

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: 2021-11-05
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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  • Porous powder loaded with super-hydrophobic particles as well as preparation method and application of porous powder
  • Porous powder loaded with super-hydrophobic particles as well as preparation method and application of porous powder
  • Porous powder loaded with super-hydrophobic particles as well as preparation method and application of porous powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] In this example, the inorganic nanoparticles are alumina, the solvent is water, the hydrophobic modifier is water-based propyloctylsiloxane oligomer Evonik Protectosil WS 670, and the porous microparticles are made of alumina and silica. Porous ceramic particles sintered at high temperature, the preparation steps are as follows, in parts by mass:

[0041] (1) Add 10 parts of nano-alumina sol, 5 parts of ammonia water, and 1.6 parts of aqueous propyloctylsiloxane oligomer Protectosil WS670 to 100 parts of deionized water and continuously stir for 24 hours to obtain a modified nanoparticle suspension;

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

[0043] (3) Add 9 parts of porous ceramic particles made by high-temperature sintering, 0.2 parts of Evonik Dynasyl...

Embodiment 2

[0048] In this example, 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 parts of aqueous perfluoroalkylsiloxane in 100 parts of deionized water, and continuously stir for 24 hours to prepare a modified nanoparticle suspension;

[0050] (2) Spray-dry the superhydrophobic nano-coating prepared in step (1) for 1-2 hours 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 a superhydrophobic coating. Hydrophobic modified nanoparticle powder;

[0051] (3) Add 4 parts of porous ceram...

Embodiment 3

[0056] Figure 5 The mechanical abrasion 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 abrasion. Thanks to the good dispersion of the porous powder loaded with super-hydrophobic particles and the strong binding force with the binder, as well as the "armor" protection of the porous ceramic particles with high strength and high temperature sintering optimized through experiments and the ability to withstand harsh 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

The invention relates to porous powder loaded with super-hydrophobic particles and a preparation method and application thereof. The preparation method comprises the steps of dispersing nano-sol, ammonia water and a water-based hydrophobic treating agent in deionized water to prepare modified nano-particle suspension liquid, and obtaining super-hydrophobic modified nano-particle powder through a spray drying method; and adding porous micron ceramic powder and a water-based silane coupling agent into deionized water, then adding the super-hydrophobic modified nano-particle powder, continuously conducting stirring to prepare a porous particle suspension loaded with super-hydrophobic particles, and obtaining the porous powder loaded with the super-hydrophobic particles through a filtering and drying or spray drying method. The preparation method disclosed by the invention is low in requirements on the material and shape of the substrate, simple in equipment, easy to operate, low in cost and capable of realizing large-area construction, and brings revolutionary changes to the fields of building coatings, anticorrosive 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] Super-hydrophobic surface refers to a solid surface on which water droplets can roll off under the action of micro-dynamic forces under the combined action of surface micro-nano structures and low-surface-energy substances. It can be widely used in industrial fields such as three-proof fabrics, anti-dew and anti-frost for air conditioners, anti-bacterial and anti-mildew for building materials, oil-water separation, anti-bioadhesion interfaces and water collection systems. However, under the action of external mechanical forces such as wear and impact, and external environments such as condensation and frosting, the most critical microstructures and low surface energy substances that constitute the su...

Claims

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Application Information

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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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