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Method for preparing superhydrophobic coating by taking nano-cellulose and nano-particle as raw materials and modifying raw materials in aqueous solution with fluoride-free modifier

A technology of nano-cellulose and super-hydrophobic coatings, applied in cellulose coatings, coatings, etc., can solve problems such as poor mechanical stability and environmental impact, and achieve the effects of mild reaction conditions, high feasibility, and good hydrophobic properties

Active Publication Date: 2019-11-26
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems that the introduction of pollutants in the preparation method of the existing superhydrophobic materials will affect the environment and cause poor mechanical stability, and provides a non-fluorine modifier modification in aqueous solution using nanocellulose and nanoparticles as raw materials. Method for preparing superhydrophobic coatings

Method used

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  • Method for preparing superhydrophobic coating by taking nano-cellulose and nano-particle as raw materials and modifying raw materials in aqueous solution with fluoride-free modifier
  • Method for preparing superhydrophobic coating by taking nano-cellulose and nano-particle as raw materials and modifying raw materials in aqueous solution with fluoride-free modifier
  • Method for preparing superhydrophobic coating by taking nano-cellulose and nano-particle as raw materials and modifying raw materials in aqueous solution with fluoride-free modifier

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specific Embodiment approach 1

[0035] Specific embodiment one: present embodiment is a kind of method that uses nanocellulose and nanoparticle as raw material in aqueous solution without fluorine modifier modification to prepare superhydrophobic coating, and it is carried out according to the following steps:

[0036] 1. Disperse nanocellulose into deionized water, and then add γ-aminopropyltriethoxysilane and fluorine-free modifier in sequence under magnetic stirring at a speed of 50r / min to 1000r / min to obtain modified Nanocellulose solution;

[0037] The mass ratio of the nanocellulose to deionized water is 1g:(100~500)mL; the mass ratio of the nanocellulose to γ-aminopropyltriethoxysilane is 1:(0.1 ~5); The mass ratio of described nanocellulose and fluorine-free modifier is 1:(0.25~10);

[0038] 2. Disperse the nanoparticles into deionized water, and then add hexadecyltrimethoxysilane and formic acid with a mass percentage of 15% to 88% under magnetic stirring with a rotating speed of 50r / min to 1000r / ...

specific Embodiment approach 2

[0050] Embodiment 2: This embodiment is different from Embodiment 1 in that: the particle size of the nanoparticles described in Step 2 is 7nm-40nm. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0051] Specific embodiment three: This embodiment differs from specific embodiment one or two in that the nanoparticles described in step two are nano-silicon dioxide, nano-titanium dioxide, nano-ferric oxide, nano-calcium carbonate, nano-kaolin or nano- alumina. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for preparing a superhydrophobic coating, and concretely discloses a method for preparing a superhydrophobic coating by taking a nano-cellulose and a nano-particle asraw materials and modifying the materials in an aqueous solution with a fluoride-free modifier. The problems of environment affection and poor mechanical stability, caused by pollutants introduced inexisting preparation methods of the super-hydrophobic material, are solved. The preparation method comprises the following steps: 1, preparation of a modified nano-cellulose solution; 2, preparationof a modified silica solution; 3, stirring; and 4, mixing. The method is used for preparing the superhydrophobic coating.

Description

technical field [0001] The invention relates to a method for preparing a superhydrophobic coating. Background technique [0002] Natural competition and selection endow plants and animals with many interesting responses to changes in their surroundings. For example, although it lives in a muddy environment, the surface of the lotus leaf is endowed with "the phenomenon of leaving the mud without staining" due to its extraordinary water repellency. Starting from the self-cleaning effect of the lotus surface, observed under a high-power electron microscope, a large number of papillae structures on the surface endow the surface roughness of the lotus, and the existence of waxy materials on the surface endows the surface with a lower surface energy. This is manifested macroscopically as having a high water contact angle (Contact Angle>150°) and a low sliding angle (Slide Angle<10°). This property exhibited by the lotus leaf surface is defined as superhydrophobicity. Star...

Claims

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Application Information

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IPC IPC(8): C09D101/02C09D7/62C08B15/05
CPCC08B15/05C08K2201/011C09D101/02C09D7/62C08K9/06C08K3/36
Inventor 王成毓王鑫
Owner NORTHEAST FORESTRY UNIVERSITY
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