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Preparation method of natural mineral-based super-hydrophobic coating and oil-water separation net

An oil-water separation net, natural mineral technology, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of high cost, complicated preparation process, inability to large-scale preparation, etc., and achieve good self-cleaning performance and operation technology. Simple, cycle-stable results

Inactive Publication Date: 2021-05-25
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation methods of superhydrophobic materials are developing rapidly, including chemical template method, etching method and electrospinning method, etc., but there are defects such as complicated preparation process, high cost and incapable of large-scale preparation.

Method used

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  • Preparation method of natural mineral-based super-hydrophobic coating and oil-water separation net
  • Preparation method of natural mineral-based super-hydrophobic coating and oil-water separation net

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: (1) base material pretreatment: the glass base material is cut into required size (5-10cm), the glass sheet cleaned with ethanol ultrasonic cleaning 30min is dried standby; (2) superhydrophobic suspension Preparation: ultrasonically disperse 1 part by weight of halloysite in 79 parts by weight of absolute ethanol and 18.2 parts by weight of ammonia water, add 1.1 parts by weight of hexadecyltrimethoxysilane under 500 r / min magnetic stirring, and then The reaction was continuously stirred for 2 hours, centrifuged at a speed of 6000 r / min for 5 minutes, and the centrifuged precipitate was collected and ultrasonically dispersed in 15.8 parts by weight of absolute ethanol. (3) Preparation of superhydrophobic coating: Spray the prepared superhydrophobic suspension onto a glass sheet, set the spraying pressure to 0.2 MPa, spraying distance to 10 cm, and dry at 60° C. for 5 hours.

Embodiment 2

[0022] Embodiment 2: (1) substrate material pretreatment: the stainless steel mesh substrate material is cut into required size (5-10cm), the cleaned stainless steel mesh is ultrasonically cleaned with ethanol for 30min and then dried for later use; (2) superhydrophobic suspension Preparation: ultrasonically disperse 1 part by weight of halloysite in 79 parts by weight of absolute ethanol and 18.2 parts by weight of ammonia water, add 1.1 parts by weight of hexadecyltrimethoxysilane under magnetic stirring at 500 r / min, and then Stirring was continued for 2 hours under the conditions, centrifuged at 6000 r / min for 5 minutes, the precipitate after centrifugation was collected, and ultrasonically dispersed in 15.8 parts by weight of absolute ethanol. (3) Preparation of oil-water separation net: Spray the prepared superhydrophobic suspension onto the stainless steel net, set the spraying pressure to 0.2 MPa, spraying distance to 10 cm, and dry at 60° C. for 5 h.

Embodiment 3

[0023] Embodiment 3: (1) base material pretreatment: the fabric / wood / carbon steel sheet base material is cut into required size (5-10cm), after the cleaned fabric / wood / carbon steel sheet is ultrasonically cleaned with ethanol for 30min (2) Preparation of superhydrophobic suspension: ultrasonically disperse 1 part by weight of halloysite in 79 parts by weight of absolute ethanol and 18.2 parts by weight of ammonia water, under magnetic stirring at 500r / min, add 1.1 parts by weight of ten Hexaalkyltrimethoxysilane was stirred and reacted at room temperature for 2 hours, centrifuged at 6000 r / min for 5 minutes, and the precipitate after centrifugation was collected and ultrasonically dispersed in 15.8 parts by weight of absolute ethanol. (3) Preparation of superhydrophobic coating: Spray the prepared superhydrophobic suspension onto fabric / wood / carbon steel sheet, set the spraying pressure to 0.2MPa, spraying distance is 10 cm, and dry at 60°C 5h.

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Abstract

The invention discloses a natural mineral-based super-hydrophobic coating, an oil-water separation net and a preparation method of the coating and net, and belongs to the field of environment-friendly materials. The super-hydrophobic coating and oil-water separation net are composed of halloysite, a surface modifier and a substrate material. The production method mainly comprises two steps of surface modification of halloysite and preparation of the coating and oil-water separation net. The halloysite has a nanotube structure; the surface modifier has relatively low surface energy; and the preparation process is simple, the cost is low, and large-scale preparation can be realized. The hydrophobicity of the super-hydrophobic coating and oil-water separation net disclosed by the invention comes from the synergistic effect of a coarse structure constructed by surface halloysite and low-surface-energy hexadecyl trimethoxy silane. The super-hydrophobic coating disclosed by the invention has a high water contact angle and can be applied to the fields of self-cleaning and oil-water separation.

Description

technical field [0001] The invention relates to the field of environmental protection materials, in particular to a low-cost, scalable production method for preparing surface self-cleaning coatings and oil-water separation nets. Background technique [0002] The leakage of petroleum / organic solvents will cause serious environmental problems, not only causing water pollution, but also causing waste of petroleum, which requires a lot of energy consumption and economic burden for water restoration. Superhydrophobic and superoleophilic materials have attracted attention due to their special wettability, and have been widely used in the fields of self-cleaning, anti-icing, anti-corrosion, and oil-water separation. Among them, oil-water separation is a way to solve the above problems. The preparation methods of superhydrophobic materials have developed rapidly, including chemical template method, etching method and electrospinning method, etc., but there are defects such as compli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 鲁启鹏曾丽曹文斌
Owner UNIV OF SCI & TECH BEIJING
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