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Janus type material with one-way water transport property as well as preparation method and application of Janus type material

A water transmission, one-way technology, applied in the direction of separation methods, chemical instruments and methods, fiber types, etc., can solve the problems of complex operation, unfavorable wide application of Janus membrane, low efficiency, etc., and achieve simple preparation process and good industrial application foreground effect

Active Publication Date: 2020-11-03
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these methods for preparing Janus membranes are complicated to operate and have low efficiency, which is not conducive to the wide application of Janus membranes.
In addition, the currently prepared Janus membranes can only be applied in a single field, and there is a lack of multifunctional Janus membrane materials.

Method used

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  • Janus type material with one-way water transport property as well as preparation method and application of Janus type material
  • Janus type material with one-way water transport property as well as preparation method and application of Janus type material
  • Janus type material with one-way water transport property as well as preparation method and application of Janus type material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the Janus dust-free cloth of the present embodiment comprises the following steps:

[0032] 1. Immerse the dust-free arrangement in an aqueous solution containing phytic acid and ferric chloride for 1 hour. The concentration of phytic acid in the aqueous solution is 5mg / L, and the concentration of ferric chloride is 2mg / L;

[0033] 2. Take out the dust-free cloth from the aqueous solution, wash it with clean water, put it in deionized water and let it stand for 1 minute, then take it out and stick it on the glass;

[0034] 3. Spray the chloroform solution containing polydimethylsiloxane with the dust-free cloth of the glass sheet with the spray gun, and the mass percentage of polydimethylsiloxane in the chloroform solution containing polydimethylsiloxane is 2%. , the injection amount of chloroform containing polydimethylsiloxane is 2mL, the pressure of the spray gun is 0.5MPa, the injection speed is 1mL / s, and the Janus-type dust-free cloth is ...

Embodiment 2

[0037] The preparation method of the present embodiment Janus nylon cloth comprises the following steps:

[0038] 1. Immerse nylon in an aqueous solution containing tannic acid and ferric chloride for 2 hours. The concentration of tannic acid is 10 mg / L, and the concentration of ferric chloride is 5 mg / L;

[0039] 2. Take out the nylon cloth from the aqueous solution, wash it with clean water, put it in deionized water and let it stand for 1 minute, then take it out and stick it on the glass;

[0040] 3. Use the spray gun to aim at the nylon cloth on the glass sheet and spray the dichloromethane solution of polydimethylsiloxane. The mass percentage of polydimethylsiloxane in the dichloromethane solution containing polydimethylsiloxane is 2%, the injection amount of dichloromethane containing polydimethylsiloxane is 4mL, the pressure of the spray gun is 0.5MPa, the injection speed is 0.5mL / s, and then dried to obtain Janus nylon cloth.

[0041] The water contact angle of the J...

Embodiment 3

[0043] The preparation method of the present embodiment Janus filter paper comprises the following steps:

[0044] 1. Immerse the filter paper in an aqueous solution containing chlorogenic acid and ferric chloride for 0.5 hours, the concentration of chlorogenic acid is 1 mg / L, and the concentration of ferric chloride is 1 mg / L;

[0045] 2. Take out the filter paper from the aqueous solution, wash it with clean water, put it in deionized water and let it stand for 1 minute, then take it out and stick it on the glass slide;

[0046] 3. Use a spray gun to aim at the filter paper on the glass sheet and spray the chloroform solution of polydimethylsiloxane. The mass percentage of polydimethylsiloxane in the chloroform solution containing polydimethylsiloxane is 3%. The injection volume of chloroform of dimethylsiloxane was 3 mL, the pressure of the spray gun was 0.5 MPa, and the injection speed was 0.5 mL / s, and then dried to obtain Janus type filter paper.

[0047] The water cont...

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Abstract

The invention relates to a Janus type material with one-way water transport property as well as a preparation method and application of the Janus type material. According to the preparation method, abase material is soaked in an aqueous solution containing an acidic organic matter and a water-soluble ferric salt for modification treatment, polydimethylsiloxane is sprayed to one surface of the base material under the action of water protection, so that one surface of the prepared Janus material is super-hydrophilic, the other surface of the prepared Janus material is super-hydrophobic, and theJanus material shows an extremely asymmetric wettability; therefore, directional water transmission can be achieved in air or oil. The Janus type material can be applied to the fields of unidirectional moisture conduction or moisture absorption and sweat releasing fabrics, oil-water separation, water collection in oil and the like.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a Janus-type material with unidirectional water transmission and a preparation method and application thereof. Background technique [0002] Janus membrane generally refers to a separation membrane with an asymmetric structure or property. Due to its unique liquid one-way transport characteristics, it is widely used in demulsification oil-water separation, one-way ion channel, mist collection, contact enzyme membrane reactor, solar distillation fields have received increasing attention. Generally, Janus membranes are realized by two methods: asymmetric preparation and asymmetric modification. Asymmetric preparation methods include sequential electrospinning, sequential vacuum filtration, molecular / fragment migration, etc.; asymmetric modification methods include single-sided photodegradation, single-sided photocrosslinking, steam treatment, single-sided coating, f...

Claims

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Application Information

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IPC IPC(8): B01D17/022D06M15/643D06M15/564D06M13/292D06M11/28D06M13/238D06M101/34D21H17/14D21H17/66D21H27/08
CPCB01D17/0202D06M15/6433D06M15/564D06M13/292D06M11/28D06M13/238D21H27/08D21H17/66D21H17/14D06M2101/34
Inventor 顾林
Owner SUN YAT SEN UNIV
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