Preparation method for fluoride-free super-hydrophobic cotton fabric

A cotton fabric and water cotton technology, applied in the field of fluorine-free super-hydrophobic cotton fabric and its preparation, can solve the problems of reducing the effect of hydrophobicity, affecting the environment, increasing costs, etc., and achieving the effect of excellent stability

Inactive Publication Date: 2016-02-24
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the method disclosed in Chinese patent CN101768854A, the preparation of titanium dioxide sol requires a large amount of organic solvent ethanol, and when non-fluorinated organic matter is modified, organic solvent ethanol, acetone, or emulsifiers are also required. Adding not only increases the cost and affects the environment, but also the residue on the fabric will reduce the hydrophobic effect

Method used

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  • Preparation method for fluoride-free super-hydrophobic cotton fabric

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of the fluorine-free superhydrophobic cotton fabric of the present embodiment, the steps are as follows:

[0018] Mix 19mL of glacial acetic acid with 235mL of distilled water, and record it as solution A; mix 60g of butyl titanate with 19mL of glacial acetic acid, and record it as solution B; put solution A in an ice bath, and add solution B to A solution dropwise. solution, and electric stirring for 2h, and then static layering, the lower layer of translucent liquid is TiO 2 Hydrosol. TiO with distilled water 2 Hydrosol dilution is 0.5%. The cotton fabric was impregnated with 0.5% nano-TiO 2 5 minutes in the sol, using the two dipping and two rolling method, the excess rate is controlled at 70%, and the nano TiO 2 The cotton fabric of the sol was first dried at 80°C, and then baked at 140°C for 3 minutes. Apply solid paraffin to the paper to make waxed paper, then mix the waxed paper with TiO 2 The surface of the sol-treated cotton fabric ...

Embodiment 2

[0020] The preparation method of the fluorine-free superhydrophobic cotton fabric of the present embodiment, the steps are as follows:

[0021] Mix 19mL of glacial acetic acid and 235mL of distilled water evenly, and record it as solution A; mix 60g of butyl titanate with 19mL of glacial acetic acid, and record it as solution B; put solution A in an ice bath, and add solution B to solution A drop by drop , and electric stirring for 2h, and then static layering, the lower layer of translucent liquid is TiO 2 Hydrosol. TiO with distilled water 2 Hydrosol dilution is 1%. The cotton fabric was impregnated with 1% nano-TiO 2 5 minutes in the sol, using the two dipping and two rolling method, the excess rate is controlled at 70%, and the nano TiO 2 The cotton fabric of the sol was first dried at 80°C, and then baked at 140°C for 3 minutes. Apply solid white wax to the paper to make waxed paper, and then mix the waxed paper with TiO 2 The surface of the sol-treated cotton fabri...

Embodiment 3

[0023] The preparation method of the fluorine-free superhydrophobic cotton fabric of the present embodiment, the steps are as follows:

[0024] Mix 19mL of glacial acetic acid and 235mL of distilled water evenly, and record it as solution A; mix 60g of butyl titanate with 19mL of glacial acetic acid, and record it as solution B; put solution A in an ice bath, and add solution B to solution A drop by drop , and electric stirring for 3h, and then static layering, the lower layer of translucent liquid is TiO 2 Hydrosol. TiO with distilled water 2 Hydrosol dilution is 1%. The cotton fabric was impregnated with 1% nano-TiO 2 10 minutes in the sol, using the two dipping and two rolling method, the excess rate is controlled at 80%, and the nano TiO 2 The cotton fabric of the sol was first dried at 70°C, and then baked at 140°C for 5min. Apply solid paraffin to paper to make stenciled paper, and then stenciled the stenciled paper with TiO 2 The surface of the sol-treated cotton ...

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Abstract

The invention discloses a preparation method for a fluoride-free super-hydrophobic cotton fabric, and belongs to the field of textile function finishing and processing. The preparation method comprises the steps that rolling-drying-baking finishing is performed on a cotton fabric by adopting nano titanium dioxide sol to improve the roughness of the surface of the fabric, and then hydrophobic modification is performed on the fabric by adopting a low-surface-energy substance-molten wax substance; the contact angle of the prepared cotton fabric and a water drop is larger than 150 degrees. According to the method, through a chemical reaction between hydroxyl of cotton fiber and hydroxyl in the nano TiO2 hydrosol, the constructed rough surface has the good firmness; through the structural characteristics of the bionic lotus leaf surface, the molten wax substance is adopted to be cured and crystallized on the rough surface of an oxide for organic modification, not only can the super-hydrophobic effect can achieved, but also the influences of introducing a fluorine-containing organic modifier and other organic solvent or a surfactant on the hydrophobicity of the fabric can be avoided, and therefore the super hydrophobicity of the prepared fabric has the excellent stability.

Description

technical field [0001] The invention belongs to the field of finishing and processing of textiles with water-repellent function, and in particular relates to a fluorine-free super-hydrophobic cotton fabric and a preparation method thereof. Background technique [0002] The superhydrophobic surface has special wettability, that is, the contact angle of water droplets on the surface of the object is greater than 150°, and it rolls freely on the surface, which has the "lotus leaf self-cleaning effect". take away. And superhydrophobic textiles with self-cleaning function have a wide range of applications in industrial production, medical treatment, military products and daily life. [0003] Since the discovery of the micro-nano protruding structure on the surface of the lotus leaf, people have mostly used the structural characteristics of the surface of the lotus leaf to imitate the super-hydrophobic surface to construct a micro-nano-scale roughness, and then carry out organic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D06M13/02D06B3/18D06B15/00D06M101/06
CPCD06M11/46D06B3/18D06B15/00D06M13/02D06M2101/06
Inventor 张晓莉王怀芳赵静秒
Owner ZHONGYUAN ENGINEERING COLLEGE
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