Abstract
Gas plasma technologies have been utilized to improve the surface properties of fibers in many applications from textiles to fiber-reinforced composites since the 1960s. This review discusses the feasibility and characteristics of gas plasma technologies applied to aramid fiber. The influence of various plasma treatments on the chemical and mechanical properties of aramid fibers as well as fiber-reinforced composites is described. The moisture regain is emphasized to achieve good bonding between aramid fibers and polymer matrix and to enhance the surface modification of aramid fiber and mechanical properties of the composites. More sophisticated technologies such as plasma-initiated graft polymerization are also discussed to highlight very recent developments.
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