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

A fluorine-free waterproof, core-shell technology, applied in fiber processing, textiles and papermaking, fibers repelling liquids, etc., can solve the problems of refractory, unsafe, etc., and achieve good dynamic water repellency and excellent surface. performance, effect of low surface energy

Active Publication Date: 2020-11-10
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 its preparation method and application
  • Core-shell type fluorine-free waterproof finishing agent and its preparation method and application
  • Core-shell type fluorine-free waterproof finishing agent and its preparation method and application

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 its preparation method and application. The core-shell type fluorine-free waterproof finishing agent is a fluorine-free emulsion with a core-shell type multi-level nanostructure, and the fluorine-free emulsion has a core- Shell structure, the core of the core-shell structure is a particle with a large particle size, and the shell of the core-shell emulsion is a fluorine-free polymer; reactive inorganic silicon monomers are dispersed in the core and the shell; the large particle size The particle size of the particles is 50-500nm; the fluorine-free polymer is polymerized from a fluorine-free long-chain alkyl (meth)acrylate monomer and a fluorine-free short-chain alkyl (meth)acrylate monomer; the The reactive inorganic silicon monomer is formed by modifying silicon dioxide nanoparticles with a particle diameter of 10-50 nm through a silane coupling agent. The textiles finished by the waterproof finishing agent of the present invention can resist rainwater and snowwater, and can discharge the sweat of the human body in the form of water vapor in time, so that the human body can be kept 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 Patents(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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