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P-aramid nanofiber solution and preparation method thereof

A nanofiber, para-aramid fiber technology, applied in the fields of nanomaterials and polymers, can solve the problems of long time and achieve the effects of low cost, simple process and high processing efficiency

Inactive Publication Date: 2014-07-23
LUDONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method takes a week and takes a long time

Method used

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  • P-aramid nanofiber solution and preparation method thereof
  • P-aramid nanofiber solution and preparation method thereof

Examples

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Effect test

Embodiment 1

[0019] The short poly(p-phenylene terephthalamide) fibers were washed with acetone, toluene, and deionized water for 3 hours, and then vacuum-dried at 60°C.

[0020] After purging the dry 150ml three-neck flask with nitrogen for 10 minutes, add 0.01 g of sodium hydride and 100 ml of anhydrous dimethyl sulfoxide at 30°C, raise the temperature to 70°C within 20 minutes, keep the temperature for 40 minutes, and then cool down to 30°C. Slowly add 0.05 g of pretreated aramid short fibers, and mechanically stir at 30° C. for 36 hours to obtain an orange-red solution containing aramid nanofibers. Bottled and sealed, it can be used as coating material or reinforcing material. (mass fraction about 0.05%)

Embodiment 2

[0022] The short poly(p-phenylene terephthalamide) fibers were washed with acetone, toluene, and deionized water for 3 hours, and then vacuum-dried at 60°C.

[0023] After purging the dry 150ml three-neck flask with nitrogen for 10 minutes, add 0.0204 g of sodium hydride and 100 ml of anhydrous dimethyl sulfoxide at 30°C, heat up to 70°C within 20 minutes, keep the temperature for 40 minutes, and then cool down to 30°C. Slowly add 0.1 g of pretreated aramid short fibers, and mechanically stir at 30° C. for 36 hours to obtain an orange-red solution containing aramid nanofibers. Bottled and sealed, it can be used as coating material or reinforcing material. (mass fraction about 0.1%)

Embodiment 3

[0025] The short poly(p-phenylene terephthalamide) fibers were washed with acetone, toluene, and deionized water for 3 hours, and then vacuum-dried at 60°C.

[0026] After purging the dry 150ml three-necked flask with nitrogen for 10 minutes, add 0.1 g of sodium hydride and 100 ml of anhydrous dimethyl sulfoxide at 30°C, raise the temperature to 70°C within 20 minutes, keep the temperature for 40 minutes, and then cool down to 30°C. Slowly add 0.5 g of pretreated aramid short fibers, and mechanically stir at 30° C. for 36 hours to obtain an orange-red solution containing aramid nanofibers. Bottled and sealed, it can be used as coating material or reinforcing material. (mass fraction about 0.5%)

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Abstract

The invention relates to a novel method for preparing a p-aramid nanofiber solution, belongs to the field of macromolecules and also belongs to the field of nano-materials. According to the solution, p-aramid nanofibers have the diameter of 20-50nm and the length of about 10 microns. The method comprises the steps: purging a dry three-mouthed bottle with nitrogen gas for 10 minutes under the protection of nitrogen gas, adding a deprotonation reagent (sodium hydride or potassium hydride or lithium hydride) and anhydrous dimethyl sulfoxide under the protection of nitrogen gas, mechanically stirring, heating to the temperature of 70 DEG C within 20 minutes, continuously reacting for 40 minutes, and then, cooling to the temperature of 30 DEG C; and then, slowly adding poly-p-phenylene terephthalamide staple fibers, and reacting for 6-72 hours at the temperature of 30 DEG C, thereby obtaining an orange-red solution containing the p-aramid nanofibers, wherein the weight percent of the p-aramid nanofibers is 0.05-3.6%. The method disclosed by the invention is simple and is strong in operability, and a feasible method is provided for the low-cost and large-scale preparation of p-aramid nanofiber materials.

Description

technical field [0001] The invention relates to a new method for preparing a para-aramid nanofiber solution, which belongs to the field of macromolecules and also belongs to the field of nanometer materials. Background technique [0002] Due to the characteristics of large specific surface area, small pore size, high porosity, and good fiber continuity, polymer nanofibers have broad application prospects in fashion, protective clothing, high-performance filters, and polymer composite materials for aerospace. In recent years, the preparation technology of polymer nanofibers has also made great progress. At present, the methods for preparing nanofibers include template synthesis method, stretching method, phase separation method, self-assembly method, electrospinning method and so on. The diameter of the fiber monofilament produced by the new melt-blown equipment of Hills Company can reach 250nm; the diameter of the fiber monofilament produced by the Swiss Rieter MB equipment...

Claims

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Application Information

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IPC IPC(8): C08L77/10C08J3/11
CPCC08J3/097C08J3/11C08J2377/10C08L77/10
Inventor 曲荣君高静静李沙沙孙昌梅殷平纪春暖陈厚
Owner LUDONG UNIVERSITY
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