scholarly journals Surface Modification of Carbon Fiber Using a Titania Solution and the Mechanical Properties of CFRTP Fabricated Using That Method

2021 ◽  
Vol 67 (5) ◽  
pp. 85-90
Author(s):  
Limin BAO ◽  
Naoki OKUNO ◽  
Mitsuo NISHIDA ◽  
Yasushi MURAKAMI
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Carbon Fiber

Effect of carbon fiber surface modification on the flexural mechanical properties of carbon fiber reinforced polyetheretherketone biocomposites

2015 ◽  
Vol 35 (7) ◽  
pp. 657-663 ◽  
Author(s):  
Yusong Pan ◽  
Yan Chen ◽  
Qianqian Shen ◽  
Chengling Pan
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Carbon Fiber ◽  
Flexural Strength ◽  
Fiber Surface ◽  
Flexural Stress ◽  
Strain Behavior ◽  
Linear Elastic ◽  
Brittle Rupture ◽  
Adverse Influence

Abstract Carbon fiber (CF) reinforced polyetheretherketone (PEEK) is one of the most promising orthopedic implant biomaterials. In this paper, CF reinforced PEEK biocomposites were fabricated by hot press molding technology. The influence of the CF surface modification on the flexural mechanical properties of CF/PEEK biocomposites was investigated. Studies on the flexural mechanical properties of CF/PEEK biocomposites revealed that the flexural stress-strain behavior of the biocomposites possessed linear elastic characteristics. The fracture mechanism of the biocomposites was predominated by brittle rupture. Both flexural strength and modulus of the biocomposites obviously increased with the rise of CF content. The influence degree of different CF modification on the flexural properties of CF/PEEK biocomposites increased with the rise of CF content. Moreover, the CF modified by concentrated HNO3 is beneficial for the flexural strength of the CF/PEEK biocomposites improvement. Conversely, CF modified by KH-560 coupling agent played an adverse influence on the flexural strength of the biocomposites.

Mechanical Properties and Creep Behavior of Carbon Fiber Nano-Composites

2011 ◽  
Vol 233-235 ◽  
pp. 2794-2799
Author(s):  
Yi Luen Li ◽  
Wei Jen Chen ◽  
Ming Yuan Shen ◽  
Chin Lung Chiang ◽  
Ming Chuen Yip
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Surface Modification ◽  
Carbon Fiber ◽  
Epoxy Resin ◽  
Creep Behavior ◽  
Primary Creep ◽  
Sem Image ◽  
Creep Stress ◽  
Electrical Conductivities

Recently, it has been observed that surface modification of carbon nanotubes（CNTs）influences on CNT’s distribution among epoxy resin and affects the mechanical properties and electrical conductivities of CNTs. Owing to above-mentioned effects, carbon nanotubes treated with oxidizing in organic acids, a kind of surface modification, generates functional groups on the surface of CNTs taht is a major investigation in this study to enhance mechanical properties and electrical conductivities of CNTs. The influence of the different proportion contents of CNTs added into epoxy resin on mechanical properties and electrical conductivities of composites was investigated, and strength of material tested under different temperature environments was observed. Moreover, the creep behavior of carbon fiber（CF）/epoxy resin thermosetting composites tested under different temperature and stress were also concerned to be analyzed. The resulting creep behavior consists of only two stages, including primary creep and steady-state creep. The effects of creep stress, creep time, different humidity treatment on the various temperature creep of composites containing different proportion contents of CNTs were investigated. It is believed that the increased creep strains can be attributed to higher applied stresses, longer creep times, higher humidity, higher temperature and lower hardnesses. The test results also exhibit that mechanical strength and electrical conductivity increase with the increase of CNTs content added into composites. In the influence of temperature effect on specimen, because of different coefficient of expansion among matrix, fiber and CNTs, the overexpansion of matrix caused by high temperature results in crack occurred among matrix. From observation of the fracture surface by SEM image, the debonding occurs and longitudinal fibers are pulled out due to poor interfacial bonding of fiber and matrix, which also results in entire strength degeneration.

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