Single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film and preparation method thereof

A composite fiber membrane, micro-nano technology, applied in fiber treatment, chemical instruments and methods, filament/wire forming, etc., can solve the problems that hinder the practical application of materials, complex preparation methods, single function, etc., and achieve good separation effect, The effect of simple preparation process and easy operation

Active Publication Date: 2019-07-23
博森纺织科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, the preparation method of Janus materials is complex, single-function and high cost, which hinders the practical application of the materials. S

Method used

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  • Single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film and preparation method thereof
  • Single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film and preparation method thereof
  • Single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for preparing a Janus-type micro-nano composite fiber membrane with superhydrophobic and hydrophilic on one side, the specific steps are as follows:

[0037](1) Prepare a CA spinning solution with a mass fraction of 19%, the solvent and the ratio are acetone: DMAC = 7:3, place it on a heating magnetic stirrer at 55°C and stir for 12 hours, inject it into a syringe and spin it on an electrospinning machine , the spinning voltage is 13KV, the receiving distance is 20cm, and the injection speed is 0.05mm / min;

[0038] (2) Prepare a PVDF spinning solution with a mass fraction of 12%, the solvent and the ratio are acetone:DMF = 6:4, place it on a heating magnetic stirrer at 55°C and stir for 12 hours, then perform centrifugal spinning, and the diameter of the spinning head is 0.4 mm, the spinning speed is 10000rpm / min;

[0039] (3) Soak the spun PVDF fiber membrane in the MPS hydrophobically modified SiO 2 Put in the sol-gel solution for 20 minutes, let it dry at ...

Embodiment 2

[0042] A method for preparing a Janus-type micro-nano composite fiber membrane with superhydrophobic and hydrophilic on one side, the specific steps are as follows:

[0043] (1) Prepare a CA spinning solution with a mass fraction of 19%, the solvent and the ratio are acetone: DMAC = 7:3, place it on a heating magnetic stirrer at 55°C and stir for 12 hours, inject it into a syringe and spin it on an electrospinning machine , the spinning voltage is 13KV, the receiving distance is 20cm, and the injection speed is 0.05mm / min;

[0044] (2) Prepare a PVDF spinning solution with a mass fraction of 11%, the solvent and the ratio are acetone: DMF = 6:4, place it on a heating magnetic stirrer at 55°C for 12 hours and then perform centrifugal spinning. The diameter of the spinning head is 0.4 mm, the spinning speed is 8000rpm / min;

[0045] (3) Soak the spun PVDF fiber membrane in the MPS hydrophobically modified SiO 2 Put in the sol-gel solution for 20 minutes, let it dry at room temp...

Embodiment 3

[0048] A method for preparing a Janus-type micro-nano composite fiber membrane with superhydrophobic and hydrophilic on one side, the specific steps are as follows:

[0049] (1) Prepare a CA spinning solution with a mass fraction of 18%, the solvent and the ratio are acetone:DMSO = 7:3, place it on a heating magnetic stirrer at 55°C and stir for 12 hours, inject it into a syringe and spin it on a centrifugal spinning machine , the diameter of the spinning head is 0.4mm, and the spinning speed is 8000rpm / min;

[0050] (2) Prepare a PVDF spinning solution with a mass fraction of 11%, the solvent and the ratio are acetone: DMF = 6:4, place it on a heating magnetic stirrer at 55°C for 12 hours and then carry out electrospinning, the spinning voltage is 13KV, The receiving distance is 20cm, and the injection speed is 0.05mm / min;

[0051] (3) Soak the spun PVDF fiber membrane in the MPS hydrophobically modified SiO 2 Put in the sol-gel solution for 20 minutes, let it dry at room t...

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Abstract

The invention relates to a single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film and a preparation method thereof. The method comprises the following steps: (1) preparing a micro-nano acetate fiber (CA) film by centrifugal spinning or electrostatic spinning; (2) preparing a micro-nano PVDF fiber film by centrifugal spinning or electrostatic spinning, fully soaking the PVDF fiber film in a SiO2 sol-gel solution hydrophobically modified by MPS, taking the PVDF fiber film out, drying in air, and grafting a D4 monomer to the PVDF fiber film in a cold plasma machine for superhydrophobic finishing; and (3) compounding the hydrophilic micro-nano CA fiber film and the hydrophobic PVDF fiber film by a hot pressing method or an adhesive method to preparethe single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film. The single-side superhydrophobic and single-side hydrophilic Janus type micro-nano composite fiber film prepared by the method can be used for industrial oil-water separation, and has the characteristics of good operability, simple process, high efficiency, environmental protection, high oil-water separation efficiency and the like.

Description

technical field [0001] The invention relates to a novel oil-water separation membrane, in particular to a Janus type micro-nano composite fiber membrane with one side super-hydrophobic and one side hydrophilic and a preparation method thereof, belonging to the technical field of new materials. Background technique [0002] In the production process, such as petrochemical, daily chemical, textile, leather, steel manufacturing and metal processing industries, a large amount of oily wastewater is produced every day. These oil-water mixtures are extremely hazardous to the environment and human health and require effective disposal. In addition, oil spills at sea have occurred frequently in recent years, causing long-term and fatal impacts on the ecosystem. So far, industrial oil-water separation methods mainly include air flotation, gravity separation, adsorption separation, coagulation and flocculation, etc., but these methods cannot effectively separate oil-water mixtures, an...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/30B32B27/06B32B9/00B32B9/04B32B37/06B32B37/10B32B37/12D01D5/00D01D5/18D04H1/4258D04H1/4318
CPCB32B5/02B32B9/00B32B9/047B32B37/06B32B37/10B32B37/12B32B2260/021B32B2262/0223D01D5/003D01D5/0069D01D5/0092D01D5/18D04H1/4258D04H1/4318
Inventor 李永强张贤母情源任琳琳王娟刘俊豪王静
Owner 博森纺织科技股份有限公司
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