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Preparation method for interface targeted film and interface targeted fiber

A fiber and interface technology, applied in fiber processing, textiles and papermaking, single-component polyurethane rayon, etc., can solve the problems of poor mechanical strength of inorganic interface films, and achieve simple and fast preparation methods and easy scale-up Effect

Active Publication Date: 2013-12-11
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the cumbersome preparation process of the existing interface film and the poor mechanical strength of the inorganic interface film, the present invention provides a method for preparing an interface targeting film, which uses hydrophobic organic polymers as raw materials and undergoes electrospinning and hydrophilic modification. The interface targeting membrane can be prepared by a unique method, and the interface targeting fiber can also be obtained by the cryosection method

Method used

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  • Preparation method for interface targeted film and interface targeted fiber
  • Preparation method for interface targeted film and interface targeted fiber
  • Preparation method for interface targeted film and interface targeted fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Spontaneous distribution of ovalbumin-modified polyurethane nanofibrous membranes at the n-hexanol / water interface

[0023] Polyurethane was dissolved in N,N-dimethylacetamide to prepare an electrospinning solution with a concentration of 25% (w / v). Electrospinning was performed with a needle with an inner diameter of 0.5 mm, and the flow rate of the electrospinning solution was 100 μL / h. The voltage is 25kV, the receiving distance is 25cm, and the receiving time is 1h. The obtained polyurethane nanofiber film has a thickness of 20 μm and an average fiber diameter of about 500 nm. After the solvent is completely volatilized, the contact angle between the film and water is 112°.

[0024] Fully soak 5 mg of polyurethane nanofiber membrane in water, take out the membrane and absorb the water on the membrane with filter paper, then put it into 1mL ovalbumin solution with a concentration of 10mg / mL, shake at room temperature for 24h, take out the fiber membrane an...

Embodiment 2

[0026] Example 2: Spontaneous distribution of ovalbumin-modified polyurethane nanofibrous membranes at the n-hexanol / water interface

[0027] Polyurethane was dissolved in N,N-dimethylacetamide to prepare an electrospinning solution with a concentration of 30% (w / v). Electrospinning was performed with a needle with an inner diameter of 0.5 mm, and the flow rate of the electrospinning solution was 500 μL / h. The voltage is 30kV, the receiving distance is 20cm, and the receiving time is 4h. The obtained polyurethane nanofiber film has a thickness of 100 μm and an average fiber diameter of about 925 nm. After the solvent is completely volatilized, the contact angle between the film and water is 110°.

[0028] Fully soak 5 mg of polyurethane nanofiber membrane in water, take out the membrane, absorb the water on the membrane with filter paper, then put it into 1mL ovalbumin solution with a concentration of 5mg / mL, shake at room temperature for 3h, take out the fiber membrane and wa...

Embodiment 3

[0030] Example 3: Spontaneous distribution of ovalbumin-modified polyurethane nanofibrous membranes at the n-hexanol / water interface

[0031] Polyurethane was dissolved in N,N-dimethylacetamide to prepare an electrospinning solution with a concentration of 25% (w / v). Electrospinning was performed with a needle with an inner diameter of 0.5 mm, and the flow rate of the electrospinning solution was 100 μL / h. The voltage is 25kV, the receiving distance is 25cm, and the receiving time is 1.5h. The obtained polyurethane nanofiber film has a thickness of 29 μm and an average fiber diameter of about 500 nm. After the solvent is completely evaporated, the contact angle between the film and water is 112°.

[0032] Fully soak 5 mg of polyurethane nanofiber membrane in water, take out the membrane and use filter paper to absorb the water on the membrane, then put it into 1mL ovalbumin solution with a concentration of 8mg / mL, shake at room temperature for 12h, take out the fiber membrane ...

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Abstract

The invention discloses a preparation method for an interface targeted film and an interface targeted fiber. A hydrophobic macromoleclar polymer serves as a raw material, a nano fiber film is prepared by an electrostatic spinning method, the film is subjected to hydrophilic modification through the absorbing or coupling effect of a protein on the fiber film, and the fiber film which is spontaneously distributed at a plurality of oil and water two-phase interfaces is obtained by adjusting a contact angle between the film and water and the water content in the film; and the interface targeted fiber can be prepared by a freezing slice method. The preparation process is simple and convenient, and easy to amplify. The prepared interface targeted film and the prepared interface targeted fiber are high in mechanical strength, and can be widely applied to fields of biological catalysis, oil and water separating, emulsion stabilizing and the like.

Description

technical field [0001] The invention relates to a preparation method of an interface targeting film and an interface targeting fiber, belonging to the technical field of functional materials. It specifically relates to a method for preparing interface-targeting membranes and interface-targeting fibers using hydrophobic polymers as raw materials. The prepared membranes or fibers can be spontaneously distributed to the oil-water two-phase interface, and can be widely used in biocatalysis and oil-water separation and stabilized emulsions. Background technique [0002] As early as 1907, Pickering described the phenomenon that colloidal particles can be adsorbed to the oil-water two-phase interface, and pointed out that if the colloidal particles are added to the oil-water emulsion, the self-assembled particles at the two-phase interface can stabilize the droplet. Since then, interfacial spontaneous distribution and interfacial self-assembly of particles have gradually become re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/70D01F6/42D01F8/16D01F8/10D01D5/42D06M15/15D04H1/728D04H1/4358D04H1/4282D06M101/38D06M101/20
Inventor 张羽飞张松平苏志国李鹏举
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI