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
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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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