Ultrasonic chemistry surface modifying method for PBO fiber

A technology of surface modification and ultrasonic chemistry, applied in fiber treatment, fiber type, textile and papermaking, etc., can solve the problems of difficult to control the degree of modification, poor interface bonding performance, poor modification uniformity, etc., and shorten the modification time. , The effect of small loss of fiber performance and stable modification process

Inactive Publication Date: 2008-08-06
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for sonochemical surface modification of PBO fibers, which utilizes the cavitation effect of ultrasonic waves, is easy to implement under laboratory conditions and industrial production conditions, and has the simplest operation and the lowest production cost. In order to solve the problems of difficult control of the degree of modification, poor...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 80wt% polyphosphoric acid and 99.7wt% dehydrated alcohol into the polyphosphoric acid dehydrated alcohol mixed solution that the volume ratio is 1: 1 and put it into the ultrasonic equipment, under the condition of ultrasonic power 30W, ultrasonic frequency 45kHz, carry out Ultrasonic dispersion was carried out for 5 minutes to prepare a uniformly dispersed mixed solution.

[0015] Immerse the PBO fiber in the above-mentioned dispersed polyphosphoric acid anhydrous ethanol mixed solution, and continue ultrasonic oscillation for 3 minutes under the conditions of ultrasonic power 60W, ultrasonic frequency 50kHz, and water bath temperature 50°C;

[0016] The modified PBO fibers were taken out and washed repeatedly with deionized water.

[0017] The above-mentioned modified PBO fiber after cleaning was taken out, and dried at 60°C to obtain the surface-modified PBO fiber.

Embodiment 2

[0019] Immerse the PBO fiber in 98wt% methanesulfonic acid solution, and oscillate ultrasonically for 1 min under the conditions of ultrasonic power 70W, ultrasonic frequency 60kHz, and water bath temperature 60°C;

[0020] Take out the modified PBO fiber and wash it repeatedly with distilled water.

[0021] The above-mentioned modified PBO fibers after cleaning were taken out, and dried at 70°C to obtain surface-modified PBO fibers.

Embodiment 3

[0023] Immerse the PBO fiber in 80wt% polyphosphoric acid solution, and oscillate ultrasonically for 1min under the conditions of ultrasonic power 100W, ultrasonic frequency 20kHz, and water bath temperature 40°C;

[0024] The modified PBO fibers were taken out and washed repeatedly with deionized water.

[0025] The above-mentioned modified PBO fibers after cleaning were taken out, and dried at 80°C to obtain surface-modified PBO fibers.

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Abstract

The invention relates to the technical field of macromolecule fiber surface modification and in particular provides a method for modifying the ultrasonic chemical surface of PBO fiber. The method of the invention is characterized in that the method comprises: dipping the PBO fiber into chemical solution which is well arranged and evenly dispersed, vibrating for 1-10min with ultrasonic wave under the condition that the ultrasonic power is 30-100W, the ultrasonic frequency is 20-60 kHz, and the water bath temperature is 20-60DEG C, taking out the PBO fiber after modification, using deionized water or distilled water to wash repeatedly, taking out the PBO fiber which is modified after washing, and drying in 50-150DEG C, wherein chemical solution is at least one of mixed solution of polyphosphoric acid and anhydrous alcohol, polyphosphoric acid, methanesulfonic acid, nitric acid, formic acid and silane coupling agent. The investment cost for equipment which is used in the invention is low, the operation is convenient, the technical process is short, the modifying process is stable, the modified effect of the PBO fiber surface is increased, the fiber property loss is small, and the quality is reliable.

Description

technical field [0001] The invention belongs to the technical field of surface modification of polymer fibers, and in particular provides a method for ultrasonic chemical surface modification of PBO (poly-p-phenylene benzobisoxazole) fibers. Background technique [0002] Poly-p-phenylenebenzobisoxazole (PBO) fiber is an ultra-high-performance polymer fiber developed by Wolfe et al. in the early 1980s. It generally has a diameter of about 12 μm and has higher specific strength and specific modulus than aramid fibers. A series of excellent properties such as weight and high temperature resistance, its density is about 1.57g / cm 3 , the tensile strength reaches 5.8GPa, the tensile modulus reaches 280GPa, and the heat-resistant temperature reaches 650°C. As a reinforcement of a new generation of advanced composite materials, PBO fibers have broad application prospects in various fields of national economy, aerospace and national defense [Jin Junhong, Luo Kaiqing, Jiang Jianming,...

Claims

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Application Information

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IPC IPC(8): D06M10/04D06M11/72D06M13/256D06M11/64D06M13/188D06M13/50D06M101/30
Inventor 刘雪峰栾燕燕谢建新
Owner UNIV OF SCI & TECH BEIJING
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