Method and system for testing wettability of aramid fiber composite material

Abstract

The invention discloses a method and a system for testing wettability of an aramid fiber composite material. The method comprises the following steps: acquiring two groups of aramid staple fiber sample columns with the same mass, height and bulk density; the method comprises the following steps: taking n-hexane as a complete wetting body, vertically hanging a measuring tube provided with a group of aramid fiber short filament sample columns on a balance hook of a surface tension meter, determining the distance between the lower end of the balance hook and the liquid level of the n-hexane, setting adsorption time, operating a Washburn program of the surface tension meter, and carrying out multiple parallel sample repeated measurement, calculating a parameter beta value of a group of aramid staple fiber sample columns; liquid in the surface tension meter is replaced with liquid to be measured, the measuring tubes of the other group of sample columns are vertically hung on a balance hook of the surface tension meter, the distance between the lower end of the balance hook and the liquid level to be measured is determined, the adsorption time is set, the Washburn program is operated, parallel sample repeated measurement is conducted multiple times, and according to the value of a parameter beta, the liquid in the surface tension meter is measured. And calculating the contact angle between the aramid fiber and the liquid to be tested, and testing the wettability of the aramid fiber composite material.

Description

technical field [0001] The invention relates to the field of performance testing of composite materials, and more particularly, to a method and system for testing the wettability of aramid fiber composite materials. Background technique [0002] Aramid composite material is known as the diamond in the global material crown and ranks among the three high-performance materials. Its industrialization process has a vital impact on my country's national defense construction and leading industrial projects (such as large aircraft, high-speed trains, shipbuilding, electric power, electronic information, building materials, etc.). In the field of military industry, aramid composite materials are widely used in high-performance structural parts and special electronic equipment of aircraft, ships, submarines, tanks, missiles, radars. In the civil field, it is mainly used for high-performance structural parts of aerospace, aviation, high-speed trains and automobiles, rail transit, nuc...

AI Technical Summary

Problems solved by technology

However, this method needs to spray pico-upgraded droplets on the surface of fibers with a diameter of micron, which is expensive and difficult to operate.

Moreover, due to the gravity of the droplet and the hygroscopicity of the fiber, it is difficult for the droplet to maintain a fixed shape on the fiber, and there is a certain error in the measurement result

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