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Silica anti-reflection coating liquid and its preparation method and application in polyester fabric

An anti-reflection coating, silica technology, applied in textiles, papermaking, fiber processing, etc., can solve the problem of decline; China's invention patent application, no porous structure, unstable membrane structure, etc., to achieve a small impact on fabric feel , The operation is simple and easy, and the hydrophilicity is improved.

Active Publication Date: 2016-04-13
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In a related report, a Chinese invention patent application (application number: CN201210303496.0) proposed a method of fixing nano-silica sol on the surface of the fabric based on adhesive film formation to achieve emission reduction. Filling between particles, this type of anti-reflection film does not have a porous structure; the paper "Hydrophobically Modified Nano-SiO 2 Preparation and Deepening Finishing of Dyeing Silk Fabrics" (Serial Science, 2013, 39, 1131-1138), it is proposed to use 3-(methacryloyloxy)propyltrimethoxysilane to treat nano-silica sol particles Hydrophobic modification, improving the physical adsorption efficiency of silk fabrics by silica sol particles, and constructing anti-reflection coatings on the surface of silk fabrics. Compared with the Chinese invention patent application (application number: CN201210303496.0), this method does not use adhesives, but due to A small amount of methoxy group remaining on the surface of the particle is affected by the steric hindrance effect of the propyl methacrylate group connected to it, so it is difficult to undergo a condensation reaction and cannot link the particles to each other. Therefore, the silica sol obtained by this modification method can be used on the surface of the fabric An anti-reflection film is formed, but the film structure is unstable, so after repeated washings, the anti-reflection performance is greatly reduced; in the Chinese invention patent application (application number: CN201310401620.1), a new modification method is proposed, which will be compatible with The β-sulfate ethyl sulfone functional groups chemically bonded by active groups such as silk fiber amino and hydroxyl groups are fixed on the surface of the silica sol to realize the stable fixation of the sol particles on the surface of the silk fabric and obtain better results. Active groups such as amino and hydroxyl groups, so the method in the patent application for this invention is not suitable for building a stable anti-reflection film on the surface of polyester fabrics

Method used

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  • Silica anti-reflection coating liquid and its preparation method and application in polyester fabric
  • Silica anti-reflection coating liquid and its preparation method and application in polyester fabric
  • Silica anti-reflection coating liquid and its preparation method and application in polyester fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Weigh 10g of ethanol and add it to 30g of commercial silicon dioxide aqueous dispersion (solid content is 50%, the average particle diameter of silicon dioxide particles is 20nm), after mechanical stirring and mixing, the solution is added to 100mL jacketed reaction In the container, the temperature began to rise. After the temperature reached 40°C, 2.5 g of tetraethoxysilane was added thereto, and the pH of the solution was adjusted to 6 with acetic acid, and the reaction started. After reacting for 24 hours, a silicon dioxide anti-reflection coating liquid composed of the condensation product 1 of tetraethoxysilane and silicon dioxide was prepared, with a solid content of 37.5%.

[0045] The product 1 was centrifuged-washed five times to remove the input but unreacted substances, and the white powder of the product 1 obtained after vacuum drying was analyzed by KBr tablet method, and its infrared analysis spectrum was as follows: figure 1 shown. The chemical structur...

Embodiment 2

[0047] Weigh 20g of ethanol and add it to 50g of commercial silicon dioxide aqueous dispersion (solid content is 50%, the average particle diameter of silicon dioxide particles is 20nm), after mechanical stirring and mixing, the solution is added to 250mL jacketed reaction 5 g of methyltrimethoxysilane was added thereto after the temperature reached 25° C., and the pH of the solution was adjusted to 5 with formic acid. After reacting for 20 hours, a silicon dioxide anti-reflection coating liquid composed of the condensation product 2 of methyltrimethoxysilane and silicon dioxide was prepared, with a solid content of 35.7%.

[0048] After diluting the product 2 and the commercial silica, the particle size distribution curve was measured respectively by a Malvern nanometer particle size analyzer, as shown in figure 2 shown. The particle size of the product 2 modified by the silane coupling agent and the commercial silica are both about 20nm, and the particle size distribution ...

Embodiment 3

[0050] Weigh 8g of ethanol and add it to 65g of commercial silicon dioxide aqueous dispersion (solid content is 50%, the average particle diameter of silicon dioxide particles is 20nm), after mechanical stirring and mixing, the solution is added to 250mL jacketed reaction 3.25 g of tetramethoxysilane was added thereto after the temperature reached 40° C., and the pH of the solution was maintained at 7 without adding acid. After reacting for 24 hours, a silicon dioxide anti-reflection coating liquid composed of the condensation product 3 of tetramethoxysilane and silicon dioxide was obtained, with a solid content of 44.5%.

[0051] image 3 It is a transmission electron micrograph of commercial silica, and the transmission electron micrograph of tetramethoxysilane and silica condensation product 3 that embodiment 3 obtains is as follows: Figure 4 shown. Depend on image 3 and Figure 4 It can be seen that product 3 has no obvious difference in nanoparticle morphology compa...

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Abstract

The invention discloses silicon-dioxide antireflection coating liquid, a preparation method of the silicon-dioxide antireflection coating liquid and application of the silicon-dioxide antireflection coating liquid in polyester fabrics. The preparation method is simple, easy, mild in condition and easy to control, and the solid content of the prepared antireflection coating liquid is high. The preparation method comprises the following steps: adding a silicon-dioxide aqueous dispersion liquid which is sold on the market, and a silane coupling agent into alcohol so as to obtain a reaction liquid, adjusting the pH value of the reaction liquid to 3-8, rising the temperature to 20-50 DEG C, and reacting for 12-40 hours so as to obtain the nano-silicon-dioxide antireflection coating liquid with the alcoxyl groups on the surface finally. The prepared silicon-dioxide antireflection coating liquid with the alcoxyl groups on the surface can be used for deepening finish of one polyester fabric, and an antireflection film with a nanoporous structure is built on the surface of the fabric, so that the fabric has the rich-color effect, the deepening durability is improved and the hygroscopicity and the wearing comfort of the fabric are not changed.

Description

technical field [0001] The invention relates to the field of textile additives and its preparation, in particular to a silicon dioxide anti-reflection coating liquid, its preparation method and its application in polyester fabrics. Background technique [0002] Polyester fabric has the advantages of wear resistance, stiffness, easy washing, and quick drying, and is popular among consumers, but it has the disadvantages of poor hygroscopicity and dyeing depth. This is due to the smooth surface of polyester fiber, few reactive groups and polyester fiber (n s =1.73) and air (n 0 = 1.0) the difference in refractive index is large, the incident light is largely reflected on the surface of the fiber, and only a small part of the light is refracted into the interior of the fiber to form colored light, resulting in poor saturation of the cloth surface, making it difficult to present such things as dark green, navy blue, purple red, ink black, etc. dark effect. In the traditional m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/79D06M101/32
Inventor 杨雷蒋慧沈一峰戚栋明
Owner ZHEJIANG SCI-TECH UNIV
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