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Biodegradable oil-water separation net film with super-hydrophobic and super-oleophylic properties and preparation method thereof.

A technology for oil-water separation omentum and phase separation, applied in separation methods, liquid separation, semi-permeable membrane separation, etc., can solve the problems of complex experimental operation and large influence on membrane properties, and achieve simple experimental operation, simple preparation method, speed-up effect

Active Publication Date: 2013-06-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the experimental operation of this method is complicated, and further processing is required, and there are certain restrictions and requirements on the thickness and water resistance of the film.

Method used

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  • Biodegradable oil-water separation net film with super-hydrophobic and super-oleophylic properties and preparation method thereof.
  • Biodegradable oil-water separation net film with super-hydrophobic and super-oleophylic properties and preparation method thereof.
  • Biodegradable oil-water separation net film with super-hydrophobic and super-oleophylic properties and preparation method thereof.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1, the preparation of a degradable oil-water separation omentum with superhydrophobic and superoleophilic properties with a plant fiber addition of 3.75%

[0037] (1) the PLA that the weight average molecular weight molecular weight is 69000 is dissolved in 1,4-oxane solvent, is mixed with the solution that concentration is 0.1g / mL, adds the kapok staple fiber (average length is less than 3mm) that shears, The mass ratio of the kapok fiber to the PLA is 3.75%, and the mixture is stirred to form a uniform mixture, and then the mixture is evenly spread on the glass substrate.

[0038] (2) Submerge the glass substrate coated with the solution in absolute ethanol for 30 minutes to perform phase separation to form a thin film.

[0039] (3) Take it out and put it into an oven to dry at 40° C. to obtain the superhydrophobic and superoleophilic biodegradable oil-water separation omentum.

[0040] The oil-water separation material has a micro-nano composite porous struc...

Embodiment 2

[0044] Example 2, the preparation of a degradable oil-water separation omentum with a superhydrophobic and superlipophilic property with an addition ratio of 7.5%

[0045] (1) Dissolving PLA with a weight-average molecular weight of 69000 in 1,4-dioxane solvent is prepared into a solution with a concentration of 0.1g / mL, and added cut kapok short fibers (average length less than 3mm), The mass ratio of the kapok fiber to the PLA is 7.5%, and it is stirred to form a uniform mixture, and then the mixture is evenly spread on the glass substrate.

[0046] (2) Submerge the glass substrate coated with the solution in absolute ethanol for 30 minutes to perform phase separation to form a thin film.

[0047] (3) Take it out and put it into an oven to dry at 40° C. to obtain the superhydrophobic and superoleophilic biodegradable oil-water separation omentum.

[0048] The oil-water separation material has a micro-nano composite porous structure and kapok fibers are blended in the omentu...

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PUM

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Abstract

The invention discloses a biodegradable oil-water separation net film with super-hydrophobic and super-oleophylic properties and a preparation method of the biodegradable oil-water separation net film. The preparation method comprises the following steps of: dissolving the separation net film in an organic solvent by adopting PLA (Poly Lactic Acid) as a unique or main material, adding a vegetable fiber material, immersing a poor solvent of the PLA after mixing uniformly, preparing and obtaining a micronan composite net-shaped porous structure by phase separation and forming the biodegradable oil-water separation net film with the super-hydrophobic and super-oleophylic properties after drying. The biodegradable oil-water separation net film disclosed by the invention has the advantages that the super-hydrophobic and super-oleophylic special wettability is achieved, the contact angle to water in the air is larger than 150 degrees, the contact angle to oil is near 0 degree, and the oil-water separation effect is good. The biodegradable oil-water separation net film disclosed by the invention also has the advantages of high separation speed, good separation effect, simple preparation method, no need of other chemical additives, wide material source and biodegradability, and can be prepared on large scale for the aspects of oily sewage treatment and water-body purification and the like.

Description

technical field [0001] The invention relates to a biodegradable oil-water separation omentum with superhydrophobic and superoleophilic properties and a preparation method thereof. Background technique [0002] In recent years, with the increasingly serious marine pollution, it has become an important task to construct oil-water separation materials by using the special wettability (including superhydrophobicity, superhydrophilicity, superoleophobicity, and superoleophilicity) of the surface of materials to achieve oil-water separation. It is one of the research hotspots in the field of interface materials, and oil-water separation technology also plays a vital role in solving problems such as water pollution and fuel purification. According to the wettability of the surface of the material to oil and water, the material can be divided into two types: "oil-removing type" and "water-removing type", among which "oil-removing type" material has strong oil-water selectivity and g...

Claims

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Application Information

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IPC IPC(8): B01D71/48B01D67/00B01D17/022C02F1/44C02F1/40
Inventor 冯琳孙中雪陈雨宁薛众鑫卢飞刘娜
Owner TSINGHUA UNIV
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