ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Armos fiber (F-12 aramid fiber in paper) was provided with broad application foregroundas reinforcement material for advanced composites in aviation and spaceflight field, due to itsoutstanding properties, such as high modulus, high strength, high temperature resistance, erosionresistance and so on. However, the exertion of property was still limited by slippery surface, lowsurface energy and weak interfacial adhesion performance. In this study, the effects of oxygen plasmatreatment time on polar functional groups introduced onto the fiber surface, surface free energy andsurface topographic images were discussed by X-ray photoelectron spectroscopy (XPS) analysis,dynamic contact angle analysis system (DCA) and atomic force microscopy (AFM), respectively. Itwas found that the content of oxygen element and polar functional groups on fiber surface were allincreased obviously after oxygen plasma treatment. The content of oxygen element on surface foruntreated F-12 aramid fiber was 11.13%, while it increased to 15.20% after oxygen plasma treatmentfor 10 min; The content of polar functional groups on surface for untreated F-12 aramid fiber was28.14%, while it increased to 38.11% after oxygen plasma treatment for 10 min. The polarcomponent (γp) of fiber surface energy increased sharply from 6.82 mN/m to 36.68 mN/m after 10min plasma treatment, the total surface free energy was increased from 46.26 mN/m to 64.66mN/m.The results indicated that oxygen plasma treatment had introduced a large amount of reactivefunctional groups onto the fiber surface, and these groups can form together as covalent bonding toimprove the surface wettability and increase the surface energy of fibers. At the same time, oxygenplasma treatment was able to generate a mass of bulges and grooves on F-12 aramid fiber surface,which had an active effect on increasing the chemical bond and mechanical function between fiberand resin and enhancing the interfacial adhesion performance of composite. The fiber surface grooveshad been increased with the time prolonging before 10 min while decreased after 10 min, the resultsmaybe relate to partial organic on fiber surface melting. It had an adverse effect on the interfacialadhesion properties of composite. Therefore, the optimum plasma treatment time was between 5 minand 10 min
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.430.pdf
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