کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5362168 1388282 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Contrastive study of anodic oxidation on carbon fibers and graphite fibers
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Contrastive study of anodic oxidation on carbon fibers and graphite fibers
چکیده انگلیسی

Anodic oxidation of polyacrylonitrile (PAN) graphite fibers was investigated in comparison with that of carbon fibers. The mechanical and interfacial properties of the treated fibers along with their surface structures were studied with X-ray photoelectron spectroscopy, atomic force microscope, contact angle analyzer, tensile strength instrument and Raman spectrometer. The results show that the graphite fibers were inactive during anodic oxidation for the higher graphitic carbon, while the carbon fibers were active and the surface oxygen content got saturated soon. The dynamics of anodic oxidation for the fibers can be described by a homogenous thickness reduction model, which indicated that the kinetic constant of anodic oxidation for the graphite fibers was only one sixth of that for the carbon fibers. Surface roughness contributed to the improvement on fiber/matrix adhesion as well as the surface oxygen content. The achievement of the surface treatment was proved by Raman spectroscopy mapping the stress of the fiber inside an epoxy resin droplet. The increase of interfacial shear strength from the untreated graphite fibers to the anodized graphite fibers was 160% (from 65 to 170 MPa), much higher than 70% that from untreated carbon fibers to the anodized ones (from 135 to 230 MPa).

► A homogenous thickness reduction model was established for the anodic oxidation. ► The kinetics constant for the graphite fibers was 1/6 of that for the carbon fibers. ► The wettability of fiber bunch provides a practical guidance to fabricate composites. ► Raman spectrum was used to derive the shear strength of the fibers to matrix.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 258, Issue 10, 1 March 2012, Pages 4268-4275
نویسندگان
, , ,