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Organic-inorganic nanoparticle composite water repellent, preparation method and application method thereof

A technology of inorganic nano-particles and water repellent, applied in textiles and papermaking, liquid-repellent fibers, wear-resistant fibers, etc., can solve the problems that silica is prone to agglomeration and cannot be uniformly dispersed

Active Publication Date: 2020-12-29
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical cross-linking between the main components of the water repellent agent and the particles is mostly realized through reactions such as esterification and amidation. The disadvantage is that there are few components in the emulsion that actually undergo chemical cross-linking, and most of them are physical blending.
During the high-speed dispersion process of water-repellent agent prepared by double-bond modified nano-silica and alkane-containing monomer copolymerization, the silica is prone to agglomeration, adheres to the stirring shaft or the wall, and cannot be uniformly dispersed in the copolymerized monomer. body oil phase

Method used

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  • Organic-inorganic nanoparticle composite water repellent, preparation method and application method thereof
  • Organic-inorganic nanoparticle composite water repellent, preparation method and application method thereof
  • Organic-inorganic nanoparticle composite water repellent, preparation method and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0080] A kind of preparation of organic-inorganic composite nano particle water-repellent agent, comprises the following steps:

[0081] (1) Nano silica double bond modification:

[0082] Preparation of nano-silica: Under magnetic stirring, tetraethyl orthosilicate is dropped into a round-bottomed flask containing a mixed solution of ammonia and ethanol with a constant pressure funnel, and the stirring reaction is continued at room temperature, and the reaction system turns white. , centrifuge the reacted silicon dioxide dispersion, get silica gel at the bottom of the centrifuge tube, add appropriate amount of absolute ethanol again, ultrasonically disperse, centrifuge again, repeat 3 times, and vacuum dry to get nano silicon dioxide. Among them, the volume ratio of tetraethyl orthosilicate, ethanol, and ammonia water is controlled to be 1:34:2.5, and the reaction temperature is 30°C, so that nano-silica with a uniform particle size distribution of 100 nm can be obtained. Dis...

Embodiment 2

[0097] A kind of preparation of organic-inorganic composite nano particle water-repellent agent, comprises the following steps:

[0098] Referring to steps (1) and (2) in Example 1, the corresponding surface tertiary aminated silica was prepared.

[0099] Quaternization of polymer brush grafted nano silica:

[0100] The tertiary amine polymer brush grafted nano-silica was ultrasonically dispersed in 3 times the mass of absolute ethanol, and the halogenated hydrocarbon 4-bromo-1-butene containing double bond structure was added for quaternization. The halogenated hydrocarbon and nano The mass ratio of silicon dioxide is 1:100, magnetically stirred and reacted for 4 hours, poured into a large amount of ether for recrystallization, filtered by suction, and dried in vacuum to obtain quaternized nano-silica containing double bonds.

[0101] Preparation of organic-inorganic nanoparticle composite water repellent by copolymerization:

[0102] 1) Take quantitative octadecyltrimethyl...

Embodiment 3

[0109] A kind of preparation of organic-inorganic composite nano particle water-repellent agent, comprises the following steps:

[0110] Referring to steps (1) and (2) in Example 1, the corresponding surface tertiary aminated silica was prepared.

[0111] Quaternization of polymer brush grafted nano silica:

[0112] The tertiary amine polymer brush grafted nano-silica was ultrasonically dispersed in 3 times the mass of absolute ethanol, and the halogenated hydrocarbon 5-bromo-1-pentene containing double bond structure was added for quaternization. The halogenated hydrocarbon and nano The mass ratio of silicon dioxide is 1:50, and the reaction is carried out by magnetic stirring for 6 hours, poured into a large amount of ether for recrystallization, filtered by suction, and dried in vacuum to obtain quaternized nano-silica containing double bonds.

[0113] Preparation of organic-inorganic nanoparticle composite water repellent by copolymerization:

[0114] 1) Take quantitativ...

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Abstract

The invention discloses an organic-inorganic nanoparticle composite water repellent agent, a preparation method and an application method thereof, and belongs to the field of environment-friendly textiles. According to the preparation method, tertiary amine polymer brush grafted nano silicon dioxide is subjected to amination with halogenated hydrocarbon containing a double-bond structure, and thenpolymerized with an acrylate monomer to prepare the organic-inorganic nanoparticle composite water repellent, wherein the obtained composite water repellent agent has good water dispersibility and high surface positive charge density, and does not influence the stability of cationic emulsion. In order to prevent the too thick water-repellent film from hindering the formation of bulges, a thin hydrophobic layer needs to be built, inorganic nano silicon dioxide particles after fabric treatment can be adsorbed on the surface of cotton fibers along with cationic latex particles by controlling theuse amounts of organic components and inorganic components in the water repellent, and projections are provided during organic matter film formation, so that the roughness of the surface of the cotton is increased, the hydrophobic property of the water repellent is improved, the use amount of the water repellent is reduced to a certain extent, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to an organic-inorganic nano particle composite water-repellent agent and a preparation and application method thereof, belonging to the field of textiles. Background technique [0002] The water-repellent finishing of textiles plays an important role in expanding the application range of products and increasing the added value of products. Traditional water-repellent finishing agents for textiles are mostly fluorine-containing substances, which have excellent water-repellent, anti-fouling, and self-cleaning properties. However, the negative news of organic fluorine is constantly emerging, such as difficult to degrade, high bioaccumulation and multi-toxicity. Seeking alternatives to organic fluorine water repellents has become a research hotspot in related fields. [0003] The surface energy of the long carbon chain alkane polymer is low, which can give the fabric a certain water repellency. Long carbon chain alkane monomers su...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/14C08F220/32C08F220/18C08F2/28C08F2/30D06M15/263D06M101/06
CPCC08F292/00C08F2/28C08F2/30D06M15/263D06M16/00D06M2101/06D06M2200/12D06M2200/35C08F220/14C08F220/325C08F220/1818C08F220/1804C08F220/1806C08F220/1811
Inventor 杜金梅周攀飞姚安康许长海
Owner QINGDAO UNIV
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