Multiscale Structure Construction by Layer-by-Layer Self-Assembly to Modify the Carbon Fiber Surface

2020 ◽  
Vol 124 (19) ◽  
pp. 10733-10743
Author(s):  
Jingbiao Liu ◽  
Benzhi Min ◽  
Zhenqing Wang ◽  
Shuzhou Li
Keyword(s):  
Carbon Fiber ◽  
Self Assembly ◽  
Fiber Surface ◽  
Layer By Layer ◽  
Multiscale Structure ◽  
Carbon Fiber Surface

Controlled Interphase in Carbon Fiber/Epoxy Composites by Molecular Self-Assembly Method

2006 ◽  
Vol 313 ◽  
pp. 121-128
Author(s):  
J.M. He ◽  
Yu Dong Huang
Keyword(s):  
Carbon Fiber ◽  
Photoelectron Spectroscopy ◽  
Self Assembly ◽  
Epoxy Matrix ◽  
Fiber Surface ◽  
Assembly Method ◽  
Aromatic Thiols ◽  
Surface Enhanced Raman ◽  
Strong Adhesion ◽  
Carbon Fiber Surface

In this paper, a new method based on molecular self-assembly on carbon fiber surface was proposed for the improvement of interfacial properties between fiber and epoxy matrix in a composite system. In order to obtain the controlled interphase, the surface of carbon fibers was first metallized by electroless Ag plating, then was reacted with terminally functionized alkanethiols or aromatic thiols to form Ag-thiolate thin films, which further reacted with epoxy resin to generate a strong adhesion interface. The composition, structure and the morphology of the modified carbon fiber surface were examined by X-ray photoelectron spectroscopy (XPS), surface-enhanced Raman scattering (SERS) and atomic force microscope (AFM), respectively. The results showed that these self-assembly molecules were chemisorbed onto the carbon fiber surface coated with silver via the strong S-Ag bond. In addition, these thiol molecules act as coupling agents between the epoxy matrix and carbon fiber through active functional end-groups, such as –OH, -NH2. The interfacial shear strength (IFSS) of the microcomposites after introduced the controlled interphase using the microbond testing was improved.

Preparation and Property of Epoxy Based Nano-SiO2/TiO2/Polyimide Hybrid Enhanced Sizing

2011 ◽  
Vol 335-336 ◽  
pp. 96-100
Author(s):  
Cun Zhou ◽  
Jian Li Cheng ◽  
Yu Sun
Keyword(s):  
Carbon Fiber ◽  
Sol Gel ◽  
Fiber Surface ◽  
Nano Particles ◽  
Interface Properties ◽  
Particle Size Analyzer ◽  
Complex Technology ◽  
Carbon Fiber Surface ◽  
Interlaminar Shear ◽  
Micro Morphology

Abstract: An epoxy based nano-SiO2/TiO2/polyimide hybrid enhanced sizing for carbon fiber was prepared by modified SiO2/TiO2precursor in PAA collosol with silane couple agent(WD-50) and eligibility surfactant via sol-gel reaction, and both ultrasonic cavitation and multi-complex technology were used during the process. The properties of PAA-SiO2-TiO2hybrid sizing and micro-morphology of carbon fiber surface were analyzed by FTIR, DSC, Particle Size Analyzer and STM. The results indicated that nanoscale SiO2•TiO2particles dispersed in the hybrid sizing film homogeneously, and a layer with nano particles was formed on carbon fiber surface after treated by the hybrid enhanceing sizing. The roughness was increased and interface properties of carbon fiber would be improved. At the same time both tensile strength and the interlaminar shear strength were increased obviously.

Amine-Functionalized Carbon-Fiber Microelectrodes for Enhanced ATP Detection with Fast-Scan Cyclic Voltammetry

2021 ◽  
Author(s):  
Yuxin Li ◽  
Moriah E. Weese ◽  
Michael T. Cryan ◽  
Ashley E. Ross
Keyword(s):  
Cyclic Voltammetry ◽  
Carbon Fiber ◽  
Adenosine Triphosphate ◽  
Fiber Surface ◽  
Fast Scan Cyclic Voltammetry ◽  
Extracellular Signaling ◽  
Amine Functionalized ◽  
Carbon Fiber Surface ◽  
Carbon Fiber Microelectrodes ◽  
Atp Detection

Here, we provide evidence that functionalizing the carbon-fiber surface with amines significantly improves direct electrochemical adenosine triphosphate (ATP) detection with fast-scan cyclic voltammetry (FSCV). ATP is an important extracellular signaling...

scholarly journals A Miniature pH Probe Using Functional Microfiber Bragg Grating

Optics ◽  
2020 ◽  
Vol 1 (2) ◽  
pp. 202-212 ◽  
Author(s):  
Yang Ran ◽  
Peng Xiao ◽  
Yongkang Zhang ◽  
Deming Hu ◽  
Zhiyuan Xu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Ph Sensor ◽  
Fiber Surface ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Layer By Layer ◽  
Compact Size ◽  
Layer Technique ◽  
Order Of Magnitude ◽  
Ph Probes

Operando and precisely probing aqueous pH is fundamentally demanded, both in chemical and biological areas. Conventional pH probes, subjected to the larger size, are probably unfit for application in some extreme scenarios, such as a trace amount of samples. In this paper, we have further developed the pH sensor that leverages the microfiber Bragg grating with an ultra-compact size down to an order of magnitude of 10−14 m3. Using the electrostatic self-assembly layer-by-layer technique, the functional film consisting of sodium alginate, which harnesses a pH-dependent hygroscopicity, is immobilized on the fiber surface. Consequently, the alteration of aqueous pH could be quantitatively indicated by the wavelength shift of the grating resonance via the refractive index variation of the sensing film due to the water absorption or expulsion. The grating reflections involving fundamental mode and higher order mode exhibit the sensitivities of −72 pm/pH and −265 pm/pH, respectively. In addition, temperature compensation can be facilitated by the recording of the two reflections simultaneously. Furthermore, the modeling and simulation results predict the pivotal parameters of the configuration in sensitivity enhancement. The proposed proof-of-concept enriches the toolbox of pH sensor for catering to the need of detection in some extremely small spaces—for example, the living cells or the bio-tissues.

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