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Method for preparing durable cellulose fiber fabric with super-hydrophobic surface

A technology of cellulose fibers and super-hydrophobic surfaces, which is applied in fiber treatment, plant fibers, textiles and papermaking, etc., can solve the problems of high equipment requirements, unfavorable industrial production, and easy damage of rough surfaces, and achieve good durability, The effect of widening the range of application

Inactive Publication Date: 2015-05-06
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obtaining a super-hydrophobic fabric with a certain durability, this method requires plasma treatment of the fabric, which is not conducive to building a uniform rough surface, and the rough surface is easily damaged after repeated soaping, the hydrophobic effect is not durable enough, and the equipment requirements are high, which is not conducive to industrial production
[0005] In summary, although the preparation methods of durable superhydrophobic surfaces have been reported, there are still many problems in terms of economy, practicability and environmental protection.

Method used

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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  • Method for preparing durable cellulose fiber fabric with super-hydrophobic surface
  • Method for preparing durable cellulose fiber fabric with super-hydrophobic surface
  • Method for preparing durable cellulose fiber fabric with super-hydrophobic surface

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preparation example Construction

[0033] A method for preparing a durable cellulose fiber fabric with a superhydrophobic surface, using the following steps:

[0034] a.Modified SiO2 2 Preparation of composite sol

[0035](1) Mix the silicon source with the silane coupling agent and stir well to obtain a homogeneous transparent solution, wherein the silicon source is tetraethyl orthosilicate or sodium silicate, and the silane coupling agent is selected from γ-aminopropyl One of trimethoxysilane, γ-glycidyloxypropyltrimethoxysilane or γ-methacryloxypropyltrimethoxysilane;

[0036] (2) Fully mix deionized water and absolute ethanol to obtain a mixed transparent solvent;

[0037] (3) In the state of vigorous stirring, control the reaction temperature at 20°C to 60°C, slowly drop the solution obtained in step (1) into the solution obtained in step (2), and slowly Add the first catalyst, stabilize the pH value of 8-10, control the dropping speed, continue to stir vigorously for 2-4 hours, and obtain transparent m...

Embodiment 1

[0044] Under normal pressure at 30°C and under vigorous stirring, gradually drop the tetraethyl orthosilicate solution into the mixed solution of alcohol and water, and gradually add ammonia water to stabilize the pH value at 8-10, then add low surface energy substances, and continue to vigorously Stir for 1~2h to get SiO 2 Composite sol, cotton fabric impregnated with SiO 2 In the composite sol, the hydrophobic cotton fabric was obtained by two dipping and two padding, pre-baking at 80°C for 5 minutes, and baking at 150°C for 2 minutes. See the SEM image of cotton fabric and the superhydrophobic performance index figure 1 and shown in Table 1.

Embodiment 2

[0046] Under normal pressure at 30°C and under vigorous stirring, gradually drop tetraethyl orthosilicate and silane coupling agent solution into the mixed solution of alcohol and water, and gradually add ammonia water to stabilize the pH value of 8-10, and then add low surface Energy substances, continue to stir vigorously for 1 to 2 hours to obtain modified SiO 2 Composite sol, cotton fabric impregnated with modified SiO 2 In the composite sol, the superhydrophobic cotton fabric was obtained by two dipping and two padding, pre-baking at 80°C for 5 minutes, and baking at 150°C for 2 minutes. See the SEM image of cotton fabric and the superhydrophobic performance index figure 2 and shown in Table 1.

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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Abstract

The invention relates to a method for preparing a durable cellulose fiber fabric with a super-hydrophobic surface. The method comprises the following three steps: preparing modified SiO2 composite sol, preparing a modified fabric and performing super-hydrophobic finishing on the fabric. The active groups are introduced into nanometer SiO2 and fiber surface, the fabric is finished by adopting a simple one-step method, the binding force between the fabric and the inorganic nanometer SiO2 is enhanced by virtue of the active groups on the fiber surface and the cross-linking effect on the modified SiO2 surface, the covalent bonding firmness between the modified sol and the surface of the modified cellulose fiber fabric is improved, and the super-hydrophobic interface of a fluoride-free cellulose fiber fabric with certain washing fastness is finally obtained. Compared with the prior art, the preparation method disclosed by the invention is economical and environmentally friendly, and the industrial production is promoted.

Description

technical field [0001] The invention relates to the field of functional finishing of textiles, in particular to a method for preparing a durable cellulose fiber fabric with a superhydrophobic surface. Background technique [0002] The idea of ​​making a superhydrophobic surface was originally inspired by natural phenomena such as the surface of lotus leaves and insect wings that exhibit self-cleaning properties. Through the study of the microstructure of the surface of lotus leaves, it was found that the existence of micro-nano rough structures and low surface energy substances The two necessary conditions for producing a superhydrophobic surface are indispensable. Generally speaking, a superhydrophobic surface can be prepared by constructing a rough structure on a hydrophobic surface or modifying or modifying a rough surface with a low surface energy compound. When wet, we call it a superhydrophobic surface. However, the durability of superhydrophobic surfaces usually pre...

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 Applications(China)
IPC IPC(8): D06M11/79D06M13/207D06M13/192D06M101/06
Inventor 沈勇邹锐徐丽慧张惠芳王黎明李倩
Owner SHANGHAI UNIV OF ENG SCI
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