Influence of moisture regain of aramid fibers on effects of atmospheric pressure plasma treatment on improving adhesion with epoxy

• DOI: 10.1002/app.23639
• Publication Date: 2006-07-28T20:07:29Z
• Authors: L. Liu; Q. Jiang; T. Zhu; X. Guo; Y. Sun; Y. Guan; Y. Qiu
• Keywords: Aramid

Abstract One difference between a low‐pressure plasma treatment and an atmospheric pressure is that in the atmosphere, substrate material may contain significant quantities of moisture, which could potentially influence effects treatment. To investigate how existence moisture affects treatment, aramid fibers (Twaron 1000) with three different regains (0.5, 4.5, 5.5%) were treated by jet for 3 s at gas flow rate 8 L/min, head temperature 100°C, power 10 W. The scanning electron microscopy analysis showed no observable surface morphology change samples. X‐ray photoelectron spectroscopy oxygen contents 0.5 4.5% regain groups increased from control, although opposite was true 5.5% group. advancing contact angles decreased about 8°–16° whereas their receding 17°–27°. interfacial shear strengths as measured using microbond pull‐out tests more than doubled when 4.5 or 5.5%, it 58% 0.5%. In addition, single fiber tensile strength observed among samples control sample. Therefore, we concluded promoted effect improvement adhesion property to epoxy. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 242–247,