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Method for preparing lyophobic oil-absorption fiber surfaces

A fiber surface, oil absorption technology, applied in fiber processing, textiles and papermaking, etc., can solve the problems of cumbersome steps, high heat treatment temperature, high energy consumption, etc., and achieve the effect of low implementation cost and simple preparation process

Inactive Publication Date: 2010-06-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that special spraying equipment is required, and the cost of fluorine-containing materials used is relatively high
[0005] It was also found in the search that the article "Superwetting nanowire membranes for selective absorption" published by Stellacci et al. in "Nature Nanotechnology" (2008, 3, 136) proposed a method for preparing manganate nanowire films with superhydrophobic and lipophilic properties Firstly, the mixed solution of potassium sulfate, potassium persulfate and manganese sulfate is used for hydrothermal treatment at 250 °C, and then the formed suspension is poured on the Teflon substrate and heated to remove water to obtain self-supporting nanowires with hydrophobic and lipophilic properties. Membrane, which can selectively absorb oil in water, but its disadvantages are that the steps of this method are cumbersome, and the manganese-containing compounds used are environmentally harmful. At the same time, this technology requires high heat treatment temperature and high energy consumption.

Method used

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  • Method for preparing lyophobic oil-absorption fiber surfaces
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  • Method for preparing lyophobic oil-absorption fiber surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 0.5g of polystyrene particles and dissolve them in 100mL of toluene to make a polymer solution;

[0029] (2) Weigh 0.5 g of polydimethylsiloxane-modified silicon dioxide hydrophobic micropowder, and ultrasonically disperse it in the above-mentioned polymer mixed solution to prepare a hydrophobic silicon dioxide dispersion;

[0030] (3) Soak the filter paper in the above mixed solution for 15 minutes, take it out and keep it warm at 60° C. for 1 hour to fully evaporate the solvent, and obtain a filter paper with a superhydrophobic and superoleophilic coating.

[0031] Such as figure 1 Shown is the photo of the water droplet on the superhydrophobic lipophilic filter paper obtained in Example 1, as seen from the figure, the contact angle of the water droplet on the filter paper surface is 157 °.

[0032] Such as figure 2 Shown is the photo of the water drop rolling on the 10° hydrophobic and lipophilic filter paper obtained in Example 1. As can be seen from th...

Embodiment 2

[0039] (1) Take 3g of polymethyl methacrylate particles and dissolve them in 100mL of chloroform to make a polymer solution;

[0040] (2) Weigh 3g of hexadecylsilane-modified silicon dioxide hydrophobic micropowder, and ultrasonically disperse it in the above-mentioned polymer mixed solution to make a hydrophobic silicon dioxide dispersion;

[0041] (3) Soak the filter paper in the above mixed solution for 30 minutes, take it out and keep it warm at 30° C. for 0.5 hour to fully evaporate the solvent, and obtain a filter paper with a superhydrophobic and superoleophilic coating.

[0042] The water contact angle of the hydrophobic and lipophilic surface prepared in this example is 158°, the rolling angle is 4°, and the oil droplet spreads completely on the surface.

Embodiment 3

[0044] (1) weigh 0.5g polyethylene terephthalate particles, dissolve in 100mL tetrahydrofuran, and make polymer solution;

[0045] (2) Weigh 3g of octylsilane-modified silicon dioxide hydrophobic micropowder, and ultrasonically disperse it in the above-mentioned polymer mixed solution to make a hydrophobic silicon dioxide dispersion;

[0046] (3) Soak the cotton cloth in the above mixed solution for 20 minutes, take it out and keep it warm at 70° C. for 5 hours to fully evaporate the solvent, and obtain a cotton cloth with a superhydrophobic and superoleophilic coating after cooling. The water contact angle of the hydrophobic and lipophilic surface prepared in this example is 155°, the rolling angle is 4°, and the oil droplet spreads completely on the surface.

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Abstract

The present invention relates to a method for preparing lyophobic oil-absorption fiber surfaces in the technical field of chemical material, in the method: polystyrene and polymethylmethacrylate or polyethylene glycol terephthalate are dissolved in organic solvent to be prepared into polymer solution; lyophobic silicon micro powder is dispersed into the polymer solution by ultrasonic method to be prepared into lyophobic silicon dioxide dispersion liquid; and after fiber bases are soaked in the lyophobic silicon dioxide dispersion liquid to be dried and cooled, the fiber bases are prepared into the lyophobic oil-absorption fiber surfaces. By building surface coatings with lyophobic and oleophilic characteristics, fiber martial has a function that the fiber martial selectly absorb oil from water and latex. The method steps are simple and easy, and the method for preparing lyophobic oil-absorption fiber surfaces is easy to popularize.

Description

technical field [0001] The invention relates to a preparation method in the technical field of chemical materials, in particular to a preparation method for the surface of hydrophobic and oil-absorbing fibers. Background technique [0002] Superhydrophobic and oleophilic surfaces usually refer to solid surfaces where the contact angle of water is greater than 150°, water droplets are easy to roll off, and oil tends to spread completely. It has a wide range of applications in the fields of selective liquid transport, oil-water separation, and oil removal in water. Application prospect [0003] The contact angle of a droplet on a rough surface is mainly determined by the surface free energy and microscopic geometry of the solid, so liquids with different surface tensions will show different wettability on the same surface. The surface tension of water is very high, up to 72mN / m, but the surface tension of oil is very small, so oil can wet many super-hydrophobic surfaces. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/233D06M15/263D06M15/507D06M11/79
Inventor 王苏浩李梅路庆华
Owner SHANGHAI JIAO TONG UNIV