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Super-hydrophobic and -oleophylic cloth producing method

A super-hydrophobic and super-oleophilic technology, applied in fiber types, textiles and papermaking, fiber treatment, etc., can solve the problems of unfavorable application and cost increase, and achieve the effects of scale-up production, low cost and simple steps

Active Publication Date: 2015-08-12
HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of dopamine will lead to a substantial increase in cost, which is not conducive to practical application

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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  • Super-hydrophobic and -oleophylic cloth producing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Preparation of superhydrophobic superoleophilic cloth

[0032] (1) Put the fabric (polyester) in ethanol for 30 minutes of ultrasonic treatment;

[0033] (2) Dissolve 0.2g of dopamine hydrochloride and 0.1g of folic acid in 100 mL of water, and stir at 60°C for 6 hours;

[0034] (3) Use sodium hydroxide to adjust the pH value of the above mixed solution to 8, then add the washed cloth and stir at room temperature for 9 hours to obtain a cloth with obvious hierarchical structure on the surface (such as image 3 shown).

[0035] (4) Take out the cloth, wash it with ethanol, put it in the ethanol solution of octadecylamine, the concentration of octadecylamine is 10 mmol L -1 , after 24 hours of reaction, the superhydrophobic and superoleophilic fabric was obtained with a water contact angle of 162 o (Such as Figure 4 shown), the toluene contact angle is 0 o (Such as Figure 5 shown).

Embodiment 2

[0036] Embodiment 2: Preparation of superhydrophobic superoleophilic cloth

[0037] (1) Put the cloth (cotton) in acetone for 30 minutes of ultrasonic treatment;

[0038] (2) Dissolve 0.1 g of dopamine hydrochloride and 0.1 g of folic acid in 100 mL of water, and stir at 50°C for 6 hours;

[0039] (3) Adjust the pH value of the above mixed solution to 9 with sodium hydroxide, then add the washed cloth and stir at room temperature for 12 h to obtain a cloth with a uniform and dense micro-nano structure on the surface (such as Image 6 shown);

[0040] (4) Take out the cloth, wash it with ethanol, put it in the ethanol solution of octadecylamine, the concentration of octadecylamine is 15 mmol L -1 , after reacting for 24 h, the superhydrophobic and superoleophilic fabric was obtained, with a superhydrophobic contact angle of 160 o (Such as Figure 7 shown).

Embodiment 3

[0041] Embodiment 3: Preparation of superhydrophobic superoleophilic cloth

[0042] (1) Put the fabric (80% polyester, 20% cotton) in acetone for 40 minutes of ultrasonic treatment;

[0043] (2) Dissolve 0.1 g of dopamine hydrochloride and 0.05 g of folic acid in 80 mL of water, and stir at 30°C for 12 h;

[0044] (3) Adjust the pH value of the above mixed solution to 8.5 with Tris, then add the washed cloth and stir at room temperature for 24 h to obtain a cloth with a micro-nano structure on the surface (such as Figure 8 shown).

[0045] (4) Take out the cloth, wash it with ethanol, put it in the ethanol solution of octadecylamine, the concentration of octadecylamine is 20 mmol L -1 , after reacting for 24 h, the superhydrophobic and superoleophilic fabric was obtained with a water contact angle of 152 o (Such as Figure 9 shown), the oil contact angle is 0 o .

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

A super-hydrophobic and -oleophylic cloth producing method is characterized by comprising following steps: (A) cleaning a cloth and air-drying the cloth; (B) dissolving dopamine hydrochloride and folic acid in water with stirring and pre-treating the water solution to obtain a uniform mixed solution; (C) regulating the pH of the mixed solution with an alkaline medium, adding the cleaned and air-dried cloth in the mixed solution, and performing a stirring reaction to obtain a cloth having a micro-nano structure; (D) adding the cloth in an ethanol solution of octadecylamine and carrying out a reaction to obtain the super-hydrophobic and -oleophylic cloth for oil-water separation, wherein the concentration of the dopamine hydrochloride is 0.5-2.0 mg / mL, the concentration of the folic acid is 0.2-1.0 mg / mL, the pre-treatment temperature is in the range from room temperature to 60 DEG C, and the pre-treatment time is 6-24 h. The producing method is low in cost, is simple in steps, is mild in reaction conditions and is beneficial to amplified production. The cloth is stable in super-hydrophobic property and has an application potential in the fields of oil-water separation, waterproof materials and self-cleaning materials.

Description

technical field [0001] The invention relates to a method for constructing a micro-nano structure on the surface of a cloth to make it have super-hydrophobic and super-oleophilic properties. Background technique [0002] The use of dopamine to modify porous materials and make them superhydrophobic has recently received extensive attention. Constructing micro-nano structures on the surface of materials is a necessary step in the preparation of superhydrophobic materials. However, simple dopamine modification is difficult to construct micro-nano structures on the surface of materials, so the reported superhydrophobic modification of dopamine often requires doping additional nanoparticles to realize the construction of micro-nano structures. Commonly used nanoparticles are silver nanoparticles, ferric oxide nanoparticles, titanium dioxide nanoparticles, silicon dioxide nanoparticles and carbon nanotubes. In this process, nanoparticles often need to be modified with dopamine fi...

Claims

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Application Information

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IPC IPC(8): D06M13/328D06M13/368D06M13/355D06M101/32D06M101/06
Inventor 邵路王振兴
Owner HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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