Ethanol plasma-induced polymerization of carbon fiber surface for improving mechanical properties of carbon fiber-reinforced lightweight oil well cement

2019 ◽  
Vol 497 ◽  
pp. 143765 ◽  
Author(s):  
Sheng Huang ◽  
Xiaowei Cheng ◽  
Xiaoyang Guo ◽  
Yu Shi ◽  
Wei Wang
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Fiber Surface ◽  
Oil Well ◽  
Fiber Reinforced ◽  
Oil Well Cement ◽  
Carbon Fiber Surface ◽  
Carbon Fiber Reinforced ◽  
Well Cement

scholarly journals Preparation of Nano-SiO2/Carbon Fiber-Reinforced Concrete and Its Influence on the Performance of Oil Well Cement

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Yanming Li ◽  
Xiaoyang Guo ◽  
Junlan Yang ◽  
Ming Li
Keyword(s):  
Carbon Fiber ◽  
Carbon Fibers ◽  
Fiber Reinforced Concrete ◽  
Cement Stone ◽  
Oil Well ◽  
Fiber Reinforced ◽  
Pull Out ◽  
Oil Well Cement ◽  
Carbon Fiber Reinforced ◽  
Well Cement

In view of the oilfield well thin oil layer, small gap, and side drilling cementing after perforating and subsequent stimulation caused by the cement ring embrittlement (i.e., secondary channeling), the preparation of nano-SiO2/carbon fiber-reinforced body and its influence on the performance of oil well cement were studied to improve the cement stone and enhance its adaptability to oil well pressure in this study. Carbon fibers were treated by liquid phase oxidation and a coupling agent, and the “grafting to” was used to bond nano-SiO2 and carbon fibers. It was found that the mechanical properties of the enhanced cement stone are far better than those of the blank cement stone. The compressive strength and tensile strength of the enhanced oil well cement stone were increased by 25% and 26%, respectively, compared with those of the blank oil well cement sample; the modulus of elasticity was reduced by 29%. Finally, the enhancement mechanism of SiO2/carbon fiber reinforcement on cement stone was explored by infrared, scanning electron microscopy, and XRD patterns. The deflection effect, pull-out effect, and bridging effect of crack were obtained.

Effects of fiber surface treatments on mechanical properties of T700 carbon fiber reinforced BN–Si3N4 composites

2007 ◽  
Vol 471 (1-2) ◽  
pp. 169-173 ◽  
Author(s):  
Bin Li ◽  
Chang-Rui Zhang ◽  
Feng Cao ◽  
Si-Qing Wang ◽  
Bang Chen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Fiber Surface ◽  
Surface Treatments ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced

Effect of Heat Treatment on Mechanical Properties of Laminated Carbon Fiber Reinforced Polymeric Composites

2016 ◽  
Author(s):  
A. B. M. I. Islam ◽  
Ajit D. Kelkar ◽  
Lifeng Zhang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Carbon Fiber ◽  
Carbon Fibers ◽  
Fiber Surface ◽  
Fiber Reinforced ◽  
Carbon Fabric ◽  
Carbon Fiber Reinforced ◽  
Fiber Deposition ◽  
Pan Fibers

In recent years use of electrospun nanofibers and nanoparticles to improve the interlaminar properties have increased significantly. In most of the cases the additional interlaminar phase of nanofibers is required to go through various thermal and/or chemical processes. There has been emphasis to optimize the interlaminar nanofiber layers to achieve the optimum desired mechanical properties such as interlaminar strength. One common practice is to disperse nanofibers into the resin and then use the nanofiber enhanced resin to fabricate the laminated composites. However, proper dispersion and fiber filtering out are some of the problems that exist in fabrication using the nanofiber mixed resin approach. To alleviate this problem, an innovative approach of growing PAN (polyacrylnitrile) nano fibers directly on carbon fabric by electrospinning seems to solve the dispersion and fiber filtering problem. However, as PAN fibers require stabilization and carbonization, it is obvious that carbon fabric with PAN fiber deposition will have to undergo stabilization and carbonization process. The effect of stabilization and carbonization heat treatment on the mechanical properties of carbon fiber fabric is not yet fully understood. This paper presents the effects of heat treatment on carbon fabric used for fabricating laminated carbon fiber reinforced composite with epoxy resin. The heat treatment was performed at 280°C in air for six hours, and 1200°C for one hour in nitrogen which are similar to stabilization and carbonization of pure PAN fibers. The effects, due to heat treatment, were mainly characterized in terms of mechanical properties by performing tensile tests and shear tests. Fiber surface topography was observed by SEM to analyze physical changes. Chemical changes, corresponding to the existing groups with carbon fibers, were examined through FTIR. The results obtained are compared with a set of control laminated composite specimens, which were fabricated using heat vacuum assisted resin transfer molding (HVARTM) process and cured at 149°C. The two sets of composite were infused with resin in a single vacuum bag to ensure that both sets of specimens have identical resin infusion and cure cycle. Laminates used for making control specimens were fabricated using carbon fabric which did not undergo any heat treatment. A change in laminate thickness for heat treated carbon fabric was observed indicating a possible bulk up of the carbon fibers due to loss of sizing compounds, which also resulted into significant change in tensile properties.

Interphase formation and fiber matrix adhesion in carbon fiber reinforced epoxy resin: influence of carbon fiber surface chemistry

2016 ◽  
Vol 24 (7) ◽  
pp. 691-710 ◽  
Author(s):  
Judith Moosburger-Will ◽  
Jan Jäger ◽  
Julia Strauch ◽  
Matthias Bauer ◽  
Stefan Strobl ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Surface Chemistry ◽  
Epoxy Resin ◽  
Fiber Surface ◽  
Fiber Reinforced ◽  
Matrix Adhesion ◽  
Fiber Matrix ◽  
Carbon Fiber Surface ◽  
Carbon Fiber Reinforced

scholarly journals Hybrid Effect of Wollastonite Fiber and Carbon Fiber on the Mechanical Properties of Oil Well Cement Pastes

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Jianglin Zhu ◽  
Jiangxiong Wei ◽  
Qijun Yu ◽  
Mingbiao Xu ◽  
Yuwei Luo
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Carbon Fiber ◽  
Impact Strength ◽  
Flexural Strength ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Oil Well Cement ◽  
Well Cement

Oil well cement is a type of natural brittle material that cannot be used directly in cementing operations. Fiber is a type of material that can effectively improve the strength and toughness of cement stone, and hybrid fiber materials can more effectively improve the performance of a cement sample. To overcome the natural defects of oil well cement, the new mineral fiber, i.e., wollastonite fiber, and common carbon fiber were used in oil well cement, and the micromorphology, mechanical properties, and stress-strain behavior of the cement were evaluated. The experimental results show that carbon fiber and wollastonite fiber are randomly distributed in the cement paste. The mechanical properties of the cement paste are improved by bridging and pulling out. The compressive strength, flexural strength, and impact strength of cement stone containing only carbon fiber or wollastonite fiber are higher than those of the pure cement, but too many fibers are not conducive to the development of mechanical properties. A mixture of 0.3% carbon fiber with 6% wollastonite fiber in oil well cement slurry results in a greater increase in compressive strength, flexural strength, and impact strength. In addition, compared with blank cement stone, the strain of the mixed cement stone increases substantially, and the elastic modulus decreases by 37.8%. The experimental results supply technical support for the design of a high-performance cement slurry system.

Sign in / Sign up

Export Citation Format

Share Document