Abstract:

In order to improve the interface performanceof carbon fibers and resin matrix, by using T300 carbon fiber as raw material, the surface of the carbon fiber was modified by low-temperature plasma technology under the condition of air. By the orthogonal test analysis, the best solution of low-temperature plasma is concluded. Field emission scanning electron microscopy (SEM) observations show that the carbon fiber surfaces become uneven and have obvious detachment phenomenon after modification. Meanwhile, the surface roughness increases. Fourier infrared spectrum (FTIR) test and analysis show that the carbon fiber surfaces have new functional groups such as the -CH2-0H and the -COH after low-temperature plasma treatment. By the plasma treatment, the tensile strength of carbon fiber is reduced, friction properties are improved and the surface wettability is increased. It facilitates the combination of fibers and resins in the preparation of carbon fiber composite materials as well as the preparation of carbon fiber composite materials.

Key words: carbon fiber, modification treatment, low temtperature plasma technology, basic performance