The influence of proteins on calcium phosphate deposition over titanium implants studied by dynamic contact angle analysis and XPS

In this work, carbon fibers were sized with different plasticizer of sizing agent in order to improve the performances of carbon fibers and the interface of carbon fibers composites. The chemical and physical changes induced by the treatments on carbon fibers surface are examined using dynamic contact angle analysis test(DCAT) , X-ray photoelectron spectroscopy (XPS). The interfacial shear strength (IFSS) of CF/EP composites are analysised by micro-droplet test. At the same time, the wear resistance was also studied in order to understand the effect of the plasticizer of sizing agent on the carbon fibers. The study shows that the 3# sized carbon fiber has the better wetting and surface energy. XPS results reveal that the 3# samples show a significant increase in oxygen-containing groups, such as–C–OH, -COOH, -C–O–C- and -COOR. 3#sizing agent also show better interface adhesion between fibers and matrix and has better wear resistant properties.

Download Full-text

Hydrosilation-Cured Poly(dimethylsiloxane) Networks: Intrinsic Contact Angles via Dynamic Contact Angle Analysis

Macromolecules ◽

10.1021/ma021154x ◽

2003 ◽

Vol 36 (10) ◽

pp. 3689-3694 ◽

Cited By ~ 43

Author(s):

Janelle M. Uilk ◽

Ann E. Mera ◽

Robert B. Fox ◽

Kenneth J. Wynne

Keyword(s):

Contact Angle ◽

Dynamic Contact Angle ◽

Dynamic Contact ◽

Contact Angles ◽

Contact Angle Analysis

Download Full-text

Improved interfacial and impact properties of carbon fiber/epoxy composites through grafting hyperbranched polyglycerols on a carbon fiber surface

e-Polymers ◽

10.1515/epoly-2013-0029 ◽

2014 ◽

Vol 14 (2) ◽

pp. 145-150 ◽

Cited By ~ 5

Author(s):

Kaiqiang Sui ◽

Qingbo Zhang ◽

Yingying Liu ◽

Lei Tan ◽

Li Liu

Keyword(s):

Contact Angle ◽

Shear Strength ◽

Carbon Fiber ◽

Carbon Fibers ◽

Dynamic Contact Angle ◽

Fiber Surface ◽

Dynamic Contact ◽

Impact Properties ◽

Carbon Fiber Surface ◽

Contact Angle Analysis

AbstractGrafting hyperbranched polyglycerols onto a carbon fiber surface is done in an attempt to improve the interfacial and impact properties between carbon fiber and epoxy resin. Scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and dynamic contact angle analysis were performed to characterize the carbon fibers. The TGA result shows that the mass fraction of the hyperbranched polyglycerols grafted onto the carbon fibers surface was 9.03%. The SEM results indicate that the hyperbranched polyglycerols have been grafted onto the carbon surface and that the surface roughness of the carbon fiber significantly increased. The XPS result indicates that oxygen-containing functional groups obviously increased after modification. Dynamic contact angle analysis indicates that the surface energy of modified carbon fibers increased significantly compared with the untreated ones. Results of the mechanical property tests show that interfacial shear strength increased from 59.86 to 80.16 MPa, interlaminar shear strength increased from 57.57 to 73.49 MPa and impact strength simultaneously increased from 2.52 to 3.52 J.

Download Full-text