Firecracker-shaped titanium dioxide/polyimide nano hybrid fiber preparation method

A polyimide and nanofiber technology, applied in the field of fibers, can solve problems such as unfavorable promotion and complexity, and achieve the effects of wide range of use, high photocatalysis and simple preparation process

Inactive Publication Date: 2016-06-01
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Too complicat

Method used

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  • Firecracker-shaped titanium dioxide/polyimide nano hybrid fiber preparation method

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Example Embodiment

[0022] Example 1

[0023] Using pyromellitic anhydride / 4,4'-diaminodiphenylmethane polyamic acid with a solid content of 15%, polyamic acid is obtained by high-voltage electrostatic spinning, and polyimide nanometers are prepared by thermal imide process fiber.

[0024] Put the polyimide nanofibers prepared above into an autoclave containing 0.001g / mL titanium foil and 0.05mol / L hydrochloric acid. Reacted at 170°C for 12 hours to prepare a firecracker-like titanium dioxide / polyimide nano hybrid fiber.

Example Embodiment

[0025] Example 2

[0026] Using 3,3',4,4'-biphenyltetracarboxylic dianhydride / 4,4'-diaminodiphenyl ether polyamic acid with a solid content of 20%, the polyamic acid is obtained by high-voltage electrostatic spinning. Polyimide nanofibers are prepared by the imine process.

[0027] Put the polyimide nanofiber prepared above into an autoclave containing 0.002 g / mL titanium powder and 0.1 mol / L hydrochloric acid. The firecracker-like titanium dioxide / polyimide nano-hybrid fiber was prepared by reacting at 150°C for 8 hours.

Example Embodiment

[0028] Example 3

[0029] Using 3,3',4,4'diphenyl ether tetracarboxylic dianhydride / 4,4'-diaminodiphenyl ether polyamic acid with a solid content of 17%, the polyamic acid is obtained by high-voltage electrostatic spinning. Polyimide nanofibers are prepared by the imine process.

[0030] Put the polyimide nanofibers prepared above into an autoclave containing 0.004 g / mL titanium powder and 0.05 mol / L hydrochloric acid. The firecracker-like titanium dioxide / polyimide nano-hybrid fiber was prepared by reacting at 160°C for 10 hours.

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Abstract

The invention provides a firecracker-shaped titanium dioxide/polyimide nano hybrid fiber preparation method. The preparation method includes: subjecting dianhydride and diamine monomers to polycondensation to obtain a polyamide acid solution, preparing a polyamic acid solution through an electrostatic spinning technology, and obtaining polyimide fibers through a thermal imidization process; enabling polyimide nanofibers, titanium foil and hydrochloric acid to react in a high-pressure reaction kettle to obtain firecracker-shaped titanium dioxide/polyimide nano hybrid fibers.

Description

technical field [0001] The invention relates to the field of fiber technology, in particular to a method for preparing a firecracker-shaped titanium dioxide / polyimide nano-hybrid fiber. Background technique [0002] Titanium dioxide has three crystal forms: brookite, anatase and rutile. Anatase titanium dioxide is relatively stable under normal temperature and pressure. However, rutile titanium dioxide will be unstable at the end when heated, and some redox will occur. Reaction, the plate titanium type is the most unstable, this form is mixed with a small amount of impurities to form a blended state to coexist. When sharp titanium dioxide is placed in high temperature, its form will be converted into rutile, and the temperature requirement is relatively strict, which must be controlled between 610-619K. At present, titanium dioxide has become one of the most effective organic photodegradation catalysts and solar cell materials because it is non-toxic, cheap, has high cataly...

Claims

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Application Information

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IPC IPC(8): D06M11/46D01F6/74B01J31/38B01J35/06
CPCD06M11/46B01J31/063B01J31/38B01J35/06D01F6/74D06M2101/30
Inventor 常振军曾静韩捷
Owner JIANGSU UNIV OF SCI & TECH
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