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Preparation method and application of durable pH-responsive intelligent super-infiltrated fabric with self-repairing performance

A self-healing and responsive technology, applied in separation methods, wear-resistant fibers, chemical instruments and methods, etc., to achieve stable physical and chemical properties, easy implementation, and good durability

Active Publication Date: 2019-07-02
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many reports on pH-responsive superwetting materials, but most of them can only achieve a limited number of conversions between the two extreme affinities.
In addition, reports of smart hyperwetting materials with good durability and self-healing properties, in situ pH response, and optimization of various industrial operations are rare.

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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  • Preparation method and application of durable pH-responsive intelligent super-infiltrated fabric with self-repairing performance
  • Preparation method and application of durable pH-responsive intelligent super-infiltrated fabric with self-repairing performance
  • Preparation method and application of durable pH-responsive intelligent super-infiltrated fabric with self-repairing performance

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] The preparation method of the present invention comprises the following steps:

[0037] Step 1. Mix 0.25 g of perfluorooctanoic acid (PFOA) with a purity of 98% and 1.3 g to 1.7 g of butyl titanate, then add 5 to 7 mL of deionized water and 5 to 7 mL of ethanol to the resulting mixed solution, and The obtained mixed solution was ultrasonically dispersed for 20 minutes, so that the added PFOA and butyl titanate were uniformly dispersed in the solution, and then the mixed solution was stirred at 55-60° C. for 2-3 hours, and set aside.

[0038] Step 2, the anatase TiO of 0.15~0.25g 2 Add 20-30mL of absolute ethanol, and then add 0.20g-0.25g of PFOTS (perfluorooctyl trichlorosilane) to the mixture, then soak the hydroxylated fabric in the mixture, ultrasonically disperse for 30min, and so that the added TiO 2 and PFOTS are uniformly dispersed in the mixed solution, then the mixed solution is stirred in a water bath at 55-60°C for 2-3 hours, and then the PFOA / butyl titanat...

Embodiment 1

[0041] Step 1. Mix 0.25g of perfluorooctanoic acid (PFOA) with a purity of 98% and 1.3g to 1.7g of butyl titanate, then add 5mL of deionized water and 5mL of ethanol to the resulting mixed solution, and dissolve the resulting mixed solution Ultrasonic dispersion for 20min, stirring at 60°C for 3h, set aside.

[0042] Step 2, 0.15-0.25g of anatase TiO with a particle size of 10-50nm 2 Add 25mL of absolute ethanol, then add 0.20g ~ 0.25g of PFOTS to the mixture, then soak the hydroxylated fabric in the mixture, ultrasonically disperse for 30min, stir in a water bath at 60°C for 3h, then add to it and prepare in step 1 The PFOA / butyl titanate solution was continuously stirred at 60°C for 4h.

[0043] Step 3. Dry the modified fabric obtained in Step 2 at room temperature, and then dry it in a vacuum oven at 105°C for 2 hours, thereby preparing a durable and self-healing pH-responsive smart super-wetting fabric .

[0044] figure 1 is the change of the wettability of the surface...

Embodiment 2

[0054] Step 1. Mix perfluorooctanoic acid and butyl titanate, then add water and ethanol, ultrasonically disperse, heat to 55°C and stir for 3 hours to obtain PFOA / butyl titanate solution; among them, anatase TiO 2 The particle size is 10-50nm, the mass ratio of perfluorooctanoic acid to butyl titanate is 0.25:1.7; the ratio of perfluorooctanoic acid to water is 0.25g:5mL, and the ratio of perfluorooctanoic acid to ethanol is 0.25g:5mL.

[0055] Step 2, anatase TiO 2 Add it to absolute ethanol, and add PFOTS to obtain a mixed solution, then soak the hydroxylated fabric in the mixed solution, ultrasonically disperse it, heat it to 70°C and stir for 2 hours, add PFOA / butyl titanate solution, and stir under heating uniform; among them, anatase TiO 2 The ratio with absolute ethanol is 0.15g: 20mL. Perfluorooctanoic acid, anatase TiO 2 The mass ratio to PFOTS is 0.25:0.15:0.2.

[0056] Step 3, drying the modified fabric obtained in Step 2 to obtain a durable and self-repairing ...

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Abstract

The invention relates to a preparation method of durable pH-responsive intelligent super-infiltrated fabric with a self-repairing performance. The method comprises the steps of mixing perfluorooctanoic acid (PFOA) with butyl titanate, and adding water and ethanol to obtain a PFOA / butyl titanate solution; adding anatase type TiO2 into anhydrous ethanol, and adding perfluorooctyl trichlorosilane (PFOTS) to obtain mixed liquid; then, soaking hydroxylated fabric into the mixed liquid, stirring evenly, and adding the PFOA / butyl titanate solution, and stirring evenly; drying. The preparation methodis simple in preparation process, mild in reaction conditions and easy to implement, and does not need harsh reaction conditions and complex reaction equipment. The porous fabric is higher in porosityand larger in specific surface area; by taking the porous fabric as a substrate, modifying the PFOA and PFOTS compounds with low surface energy and establishing micro-nano roughness based on TiO2 particles, the surface energy of the modified fabric is reduced, and the surface roughness of the modified fabric is increased; therefore, the pH-responsive super-hydrophobic material with self-repairingproperty is obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of intelligent super-wetting materials, and in particular relates to a preparation method and application of a durable and self-repairing pH-responsive intelligent super-wetting fabric. Background technique [0002] With the rapid development of the economy and the acceleration of the industrialization process, the discharge of various industrial oily wastewater and industrial chemicals is becoming more and more frequent, which poses a great threat to the ecological environment and human health. Therefore, how to efficiently separate oil-water mixtures has become a global challenge and has attracted extensive attention. In recent years, superwetting functional materials with special wetting properties developed based on advanced interface science and bionics, such as superhydrophobic-superoleophilic materials, superhydrophilic-superoleophobic materials, etc. Separation provide...

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): D06M13/21D06M13/503D06M11/46D06M11/50D06M13/517B01D17/022C02F1/40D06M101/06
CPCB01D17/0202C02F1/40D06M11/46D06M11/50D06M13/21D06M13/503D06M13/517D06M2101/06D06M2200/01D06M2200/12D06M2200/35
Inventor 屈孟男何金梅马利利王嘉鑫
Owner XIAN UNIV OF SCI & TECH
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