Abstract:The aim of this study was to improve the electrical resistivity, mechanical properties, and interfacial properties between the carbon fiber (CF) and cellulose of conductive paper containing 10% CF so as to better meet the demands for electric heating wood floors. With waterborne polyurethane (WPU) treatment and nitrogen plasma modification methods, the interfacial properties between CF and cellulose were improved dramatically. Fourier transform infrared spectrometry (FTIR) revealed that the plasma modification… Show more
“…84-0309). This results prove the successful formation of Fe 2 O 3 on CCY with high purity 45 . Figure 2 ( A ) X-ray diffraction patterns ( B ) FT-IR spectrum and ( C ) Raman spectra of CCY and Fe 2 O 3 /CCY.…”
This study examines the use of a conductive carbon fiber to construct a flexible biosensing platform for monitoring biomarkers in sweat. Cortisol was chosen as a model analyte. Functionalization of the conductive carbon yarn (CCY) with ellipsoidal Fe2O3 has been performed to immobilize the antibodies specific to cortisol. 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-Hydroxysuccinimide (NHS) chemistry has been used to immobilize the antibodies onto the Fe2O3 modified CCY. Crystallinity, structure, morphology, flexibility, surface area, and elemental analysis were studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FE-SEM/EDS) and Brunauer–Emmett–Teller (BET) analysis. Mechanical properties of the fiber such as tensile strength, young’s modulus have also been investigated. Under optimal parameters, the fabric sensor exhibited a good linearity (r2 = 0.998) for wide a linear range from 1 fg to 1 μg with a detection limit of 0.005 fg/mL for the sensitive detection of cortisol. Repeatability, reliability, reproducibility, and anti-interference properties of the current sensor have been investigated. Detection of cortisol levels in human sweat samples has also been investigated and the results were validated with commercial chemiluminescence immunoassay (CLIA) method.
“…84-0309). This results prove the successful formation of Fe 2 O 3 on CCY with high purity 45 . Figure 2 ( A ) X-ray diffraction patterns ( B ) FT-IR spectrum and ( C ) Raman spectra of CCY and Fe 2 O 3 /CCY.…”
This study examines the use of a conductive carbon fiber to construct a flexible biosensing platform for monitoring biomarkers in sweat. Cortisol was chosen as a model analyte. Functionalization of the conductive carbon yarn (CCY) with ellipsoidal Fe2O3 has been performed to immobilize the antibodies specific to cortisol. 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-Hydroxysuccinimide (NHS) chemistry has been used to immobilize the antibodies onto the Fe2O3 modified CCY. Crystallinity, structure, morphology, flexibility, surface area, and elemental analysis were studied using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Field emission scanning electron microscopy with energy dispersive X-ray spectroscopy (FE-SEM/EDS) and Brunauer–Emmett–Teller (BET) analysis. Mechanical properties of the fiber such as tensile strength, young’s modulus have also been investigated. Under optimal parameters, the fabric sensor exhibited a good linearity (r2 = 0.998) for wide a linear range from 1 fg to 1 μg with a detection limit of 0.005 fg/mL for the sensitive detection of cortisol. Repeatability, reliability, reproducibility, and anti-interference properties of the current sensor have been investigated. Detection of cortisol levels in human sweat samples has also been investigated and the results were validated with commercial chemiluminescence immunoassay (CLIA) method.
“…The analysis shows that C-H and C-C stretching vibration could be detected at 1493 cm -1 and 1601 cm -1 , respectively. This finding was confirmed by Song et al (2015), who stated that 721 cm -1 , 1378 cm -1 , 2825 cm -1 and 2923 cm -1 wavenumbers represent C-H groups. C-H aliphatic and C-H aromatic compounds, respectively, can be detected at wavenumbers ranging from 2910-2928 cm -1 and 3001-3082 cm -1 because of the presence of carbon.…”
Section: Characterization Analysis Of Psfsupporting
Polystyrene foam (PSF), which is widely used in oyster farming in Taiwan, generates approximately 120,000-200,000 pieces of floating waste annually. The issues related to processing this waste, however, include the financial cost, incinerator clogs, human exposure to carcinogenic and non-biodegradable components, and potential debris, which threatens the seashore. In this study, we obtained methane (CH 4) and hydrogen (H 2), two crucial gases in power generation, by treating PSF waste with an atmospheric-pressure microwave plasma reactor. Substituting argon with nitrogen as the carrier gas and increasing the microwave power (1200 W) produced a higher concentration of H 2 (4739 ppm) but a lower one of CH 4 (less than 300 ppm). Treating a larger quantity of waste (0.2 g) resulted in CH 4 and H 2 levels of 19,657 ppm and 440 ppm, respectively. SEM-EDX and XRD testing confirmed the transformation of the PSF structure and a reduction in carbon (C) content in the final residue. This research demonstrates how solid waste can be recycled into valuable gases by applying plasma technology.
“…While the higher flexural properties of F‐FCNT‐CVE composites over F‐CNT‐CVE composites can be inferred to the similar reasons of low agglomeration, low van der Waals interaction among FCNTs due to surface‐active carboxyl‐functionalized groups as stated in Section 3.1.1. In addition to FCNTs forming covalent bonding with the matrix, they can also create these chemical bonding with the carbon fiber surface during the EPD technique 67,69 . The formation of covalent bonding between fiber, FCNTs, and matrix provides more substantial stress transfer compared to van der Waals interaction between CNTs and fiber/matrix.…”
In this article, the carbon fiber reinforced vinyl ester (CVE) composite was modified with pristine and functionalized carbon nanotubes (CNTs/FCNTs) using the in situ polymerization and electrophoretic deposition (EPD) techniques: individually and using both simultaneously. Their influence on the flexural properties of the composites at room (RT), cryogenic (−196°C) (CT), and elevated (70°C) (ET) temperatures were compared. Through matrix modification, the best flexural strength with CNT and FCNT modified composites was found to be 6.2% and 9.9% higher over neat CVE composite. Similarly, following the EPD technique, the optimum flexural strength enhancement with CNT and FCNT was recorded to be 10.3% and 13.8% with respect to the control composite respectively. A synergetic impact could be noticed by combining both the techniques together, where the flexural strength of the hierarchical composite with FCNT modification was improved by ~22%, ~25%, and ~ 6% higher than that of control CVE at RT, CT and ET respectively. The dispersion quality of nanotubes in the matrix and on the carbon fiber surface, and fractured surface morphology is analyzed using a SEM.
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