Core-shell type fluorine-free waterproof finishing agent, and preparation method and application thereof

A fluorine-free waterproof, core-shell type technology, applied in fiber treatment, textiles and papermaking, liquid-repellent fibers, etc., can solve problems such as refractory and unsafe, and achieve good dynamic water repellency and excellent surface Performance, long-lasting and stable surface energy effect

Active Publication Date: 2019-01-29
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing research reports have pointed out that the better performance C 6 Class replacements are still unsafe because C 6 with C 8 It is also extraordinarily refractory and more toxic to some aquatic organisms than C 8 3 to 5 times larger

Method used

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  • Core-shell type fluorine-free waterproof finishing agent, and preparation method and application thereof
  • Core-shell type fluorine-free waterproof finishing agent, and preparation method and application thereof
  • Core-shell type fluorine-free waterproof finishing agent, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] Synthesis of Large Size Particles (I):

[0088] 1) Mix 125.0g absolute ethanol and 50.0g ammonia water at room temperature;

[0089] 2) Add 50.0 g of silicon dioxide, titanium dioxide or zinc oxide particles with a particle diameter of 50-500 nm to the mixed solution in 1), and ultrasonicate for 30 minutes.

[0090] 3) Add 0.5 g of vinyltrimethoxysilane and / or γ-methacryloxypropyltrimethoxysilane to the mixture of 2), and ultrasonicate for 120 minutes;

[0091] 4) The suspension obtained in 3) was filtered with a Buchner funnel, the filter cake was washed three times with deionized water and absolute ethanol and then filtered, and the obtained filter cake was dried at 120° C. to obtain large-diameter particles (I).

Embodiment 2

[0093] Synthesis of large particle size particle dispersion (II):

[0094] 100ml H 2 O. Mix 0.3g emulsifier 1-allyloxy-3-(4-nonylphenol)-2-propanol polyoxyethylene (10) ether ammonium sulfate (DNS-86) and 0.10g NaOH into 100ml three Neck round bottom flask was stirred for 30min, then slowly added 15g KH-570 (3-(methacryloyloxy)propyltrimethoxysilane), and continued the reaction at room temperature for 24 hours, adjusted the temperature to 50°C and continued Stirring was carried out for 1 day to obtain a large-diameter particle dispersion (II).

Embodiment 3

[0096] Synthesis of Reactive Inorganic Silicon Monomer (I):

[0097] 1) Mix 125.0g absolute ethanol and 50.0g ammonia water at room temperature;

[0098] 2) Add 50.0 g of silicon dioxide nanoparticles with a particle size of 20 nm to the mixed solution of 1), and sonicate for 30 minutes;

[0099] 3) Add 0.1g of vinyltrimethoxysilane and 2.5g of dodecyltrimethoxysilane to the mixture of 2), and ultrasonicate for 120 minutes;

[0100] 4) Filter the suspension obtained in 3) with a Buchner funnel, wash the filter cake three times with deionized water and absolute ethanol and then filter, and dry the obtained filter cake at 120°C to obtain the reactive inorganic silicon monomer (I) .

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Abstract

The invention discloses a core-shell type fluorine-free waterproof finishing agent, and a preparation method and application thereof. The core-shell type fluorine-free waterproof finishing agent is afluorine-free emulsion of a core-shell type multi-stage nano-structure; the fluorine-free emulsion has a core-shell structure, wherein the core of the core-shell structure is a large-grain-size particle, and the shell of the core-shell structure is a fluorine-free polymer; a reactive inorganic silicon monomer is dispersed in both the core and the shell; the large-grain-size particle has a particlesize of 50 to 500 nm; the fluorine-free polymer is formed through polymerization of a fluorine-free long-chain alkyl (meth)acrylate monomer and a fluorine-free short-chain alkyl (meth)acrylate monomer; and the reactive inorganic silicon monomer is prepared by modifying silica nanoparticles having a particle size in a range of 10 to 50 nm modified by using a silane coupling agent. A textile finished by the waterproof finishing agent of the invention can resist rain and snow water and allows the sweat of the human body to be discharged in the form of water vapor in time, thereby keeping the human body dry, warm and comfortable.

Description

technical field [0001] The invention relates to the technical field of fabric waterproof finishing, in particular to a core-shell type fluorine-free waterproof finishing agent and its preparation method and application. Background technique [0002] Although the water absorption capacity of textile fibers is different, if the fabric is required to have a certain waterproof performance, it is necessary to waterproof the fabric. The method of chemical finishing is to fix the hydrophobic substance on the surface of the fabric or fiber or to condense and fix it inside the fiber, so as to enhance the hydrophobicity of the fabric surface. The hydrophobic substances used in finishing are called waterproof finishing agents. [0003] Due to the low surface energy of fluorine-containing compounds, they have good water-repellent and oil-repellent properties. Traditional textile waterproof finishing mainly uses fluorocarbons. Among them, the best waterproof finishing agent is the eight...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/356D06M11/79D06M11/44D06M11/46C08F220/18C08F220/14C08F230/08
CPCD06M11/44D06M11/46D06M11/79D06M15/3568C08F220/18D06M2200/12C08F220/1804C08F220/14C08F220/1812C08F230/08C08F220/1818
Inventor 易玲敏左甜李家炜钟申洁
Owner ZHEJIANG SCI-TECH UNIV
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