Kraiwattanawong, Kriangsak
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Preferred name
Kraiwattanawong, Kriangsak
Alternative Name
Kraiwattanawong, K.
Main Affiliation
Email
kriangsak.kr@kmitl.ac.th
9 results
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Item type:Publication, Porosity development of templated porous carbons dried by vacuum as carbon electrodes for electric double-layer capacitors(2023-03-15)Resorcinol and formaldehyde (RF) resin serves as the carbon precursor for porous carbons and carbon/carbon composites possessing a high specific surface area (SSA). This work presents the porosity improvement by the elimination of cotton fibers (CF) from CF/RF composite hydrogels subsequently exchanged by tertiary butyl alcohol (TBA), dried by vacuum, and carbonized. This route contributes the templated porous carbons (TPC) with an asymmetric structure comprising micropores, mesopores, and macropores. At 0.25 of the CF/RF weight ratio, TPC dried by vacuum apparatus has SSA of 2,102 m<sup>2</sup> g<sup>−1</sup>, whereas TPC dried by evaporation only offers SSA of 663 m<sup>2</sup> g<sup>−1</sup>. Using the vacuum acts as pseudo-freeze drying during TBA removal, forming sponge-like carbon and allowing ultra-high SSA. The electrochemical properties of vacuumed TPCs were analyzed, showing that TPC at 0.25 of the CF/RF weight ratio possessed 626 F g<sup>−1</sup> more than TPC at 0.00 of the CF/RF weight ratio which had 392 F g<sup>−1</sup> at 200 mA g<sup>−1</sup>. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of Nanocrystal Cellulose from Bamboo on the Flexural Strength of Acrylic Resin: In Vitro(2022-07-01); Thanathornwong, BhornsawanThe purpose of this study is to evaluate the effects of nanocrystal cellulose (NCC) from bamboo on the flexural strength of heat-cured acrylic resin. A total of 35 specimens (3.3 mm × 10 mm × 64 mm) were prepared and the specimens were divided into five groups of seven specimens each. Group 1 used conventional acrylic resin that was prepared based on the instructions of the manufacturer (0%). The filled NCC from bamboo fiber in four concentrations (0.25, 0.5, 1, and 2% w/w) was used in the four-reinforcing resin workpiece groups. The specimens were loaded until failure occurred on a three-point bending test machine. One-way analysis of variance and Dunnett’s multiple comparison test at a 95% confidence level were used to determine the statistical differences in the flexural strength among the five groups. The results found that the average flexural strength of five specimen groups (0, 0.25, 0.5, 1, and 2% w/w) were 60.11 ± 2.4, 60.75 ± 2.18, 66.50 ± 5.08, 56.04 ± 0.31, and 48.05 ± 2.61 MPa, respectively. The flexural strength of 0.5 mg% w/w NCC-reinforced acrylic resin was significantly higher than the control group (p < 0.01). The reinforced NCC from bamboo fiber to acrylic resin improved the flexural strength properties. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Macropore-assisted electrolyte transfer inside binder-free templated carbon xerogels as carbon electrode for electric double layer capacitors(2020-05-05)Capacitive performance of electric double layer capacitors is influenced by specific surface area, while pore structure also promotes electrolyte transfer inside a carbon electrode. Organic electrolytes require macropores, whereas aqueous electrolytes operate best using mesopores for electrolyte transfer. Templated carbon xerogels (TCXs) were prepared from resorcinol and formaldehyde with cotton fibers as a hard template containing macropores, mesopores and micropores as the carbon electrode. Results suggested that macropores (>50 nm) were contiguously created and connected with mesopore diameters (2–50 nm), leading to convenient ion transport inside the TCXs. Vacuum drying formed sponge-like carbon xerogels that permitted electrolyte transfer. Despite the insignificant change of porous properties, TCXs possessing sponge-like carbon xerogels showed increased capacitance values from 137 F/g to 317 F/g at 200 mA/g in a three-electrode system as a result of macropore-assisted electrolyte transfer in aqueous electrolytes. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Influence of evaporation drying on the porous properties of carbon/carbon composite xerogels(2021-08-02); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Nanoarchitectonics of carbon-based electrodes via activated carbon/carbon composite xerogels by CO2(2025-09-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Corrigendum to “Macropore-assisted electrolyte transfer inside binder-free templated carbon xerogels as carbon electrode for electric double layer capacitors” [Eur. Polym. J. 130 (2020) 109678] (European Polymer Journal (2020) 130, (S0014305720303153), (10.1016/j.eurpolymj.2020.109678))(2020-08-05)I am very sorry because I had checked my article and its SI document again. I found a mistake about the y-axis in Fig. 10(b) and Fig. S4–S6. The correct y-axis is “Voltage (V)”, but I made the mistake in the article “Capacitance (F/g)”. The author would like to apologise for any inconvenience caused. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Methylene blue degradation under visible light of Au-DP25/PET and Cu-DP25/PET photocatalytic films, synthesized through two wet impregnation routes – An experimental and theoretical evaluation(2023-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A review on the development of a porous carbon-based as modeling materials for electric double layer capacitors(2022-02-01)Carbon electrodes are a key factor for electric double layer capacitors (EDLCs). Carbon gels have high porosity with a controllable pore structure by changing synthesis conditions and modifying preparation processing to improve the electrochemical performance of EDLCs. This review summarizes the preparation of carbon gels and their derivatives, the criteria to synthesize high surface area in each process, the development by some carbon forms, and EDLC applications. Porous carbons are also prepared as model materials by concentrating on how pore structure increases electrochemical capacitance, such as electronic and ion resistance, the tortuosity of pore channel, suitable micropore and mesopore sizes, and mesopore size distribution. This review emphasizes the significance of pore structures as the key factor to allow for the design of suitable pore structures that are suitable as the carbon electrode for EDLCs. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of cotton fiber addition and carbonization temperature to the structural-and-surface-property change of C/C composite xerogels as electrodes for electric double layer capacitors(2022-11-01);