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Ultrasonic chemistry surface modifying method for PBO fiber

A technology of surface modification and ultrasonic chemistry, which is applied in fiber treatment, fiber type, textile and paper making, etc. It can solve the problems of difficulty in controlling the degree of modification, poor interface bonding performance, poor modification uniformity, etc., and shorten the modification time , The loss of fiber properties is small, and the modification process is stable

Inactive Publication Date: 2011-08-24
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 modification uniformity, serious damage to fiber properties, long modification time and high production cost when modifying the surface of PBO fiber by traditional chemical methods. , to overcome the defects of poor interfacial bonding performance between PBO fiber and metal, inorganic powder or resin due to its smooth surface and low activity, and improve the interfacial performance of PBO fiber and other materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put 80wt% polyphosphoric acid and 99.7wt% anhydrous ethanol in a polyphosphoric acid anhydrous ethanol mixed solution configured in a volume ratio of 1:1 into an ultrasonic device, and under the conditions of ultrasonic power 30W and ultrasonic frequency 45kHz, carry out Ultrasonic dispersion was carried out for 5 min to prepare a uniformly dispersed mixed solution.

[0015] Immerse the PBO fibers in the above dispersed polyphosphoric acid anhydrous ethanol mixed solution, and continue to ultrasonically oscillate for 3 min 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 modified PBO fibers after cleaning were taken out and dried at 60° C. to obtain surface-modified PBO fibers.

Embodiment 2

[0019] The PBO fibers were immersed in 98wt% methanesulfonic acid solution, and ultrasonically oscillated for 1min under the conditions of ultrasonic power 70W, ultrasonic frequency 60kHz, and water bath temperature 60℃;

[0020] The modified PBO fibers were taken out and washed repeatedly with distilled water.

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

Embodiment 3

[0023] The PBO fibers were immersed in 80wt% polyphosphoric acid solution, and ultrasonically oscillated for 1min under the conditions of ultrasonic power 100W, ultrasonic frequency 20kHz, and water bath temperature 40℃;

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

[0025] The modified PBO fiber after cleaning was taken out and dried at 80° C. to obtain the surface-modified PBO fiber.

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PUM

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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 polymer fiber surface modification, and particularly provides a method for ultrasonic chemical surface modification of PBO (that is, poly-p-phenylene benzobisoxazole) fibers. Background technique [0002] Poly-p-phenylene benzobisoxazole (PBO) fiber is an ultra-high-performance polymer fiber developed by Wolfe et al. in the early 1980s. Generally, the diameter is about 12 μm. 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 resistance temperature reaches 650℃. 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 defense and military industries [Jin Junhong, Luo Kaiqing, Jiang Jianming, et al. The effect of ionic groups on the surface proper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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