Sukwisute, Pisan
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Sukwisute, Pisan
Alternative Name
Sukwisute, P.
Main Affiliation
Email
pisan.su@kmitl.ac.th
8 results
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Item type:Publication, Phase Transformation, Surface Morphology and Dielectric Property of P(VDF-HFP)/MgCl2•6H2O Nanocomposites(2017-10-20); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Enhancement of ferroelectric phase and dielectric properties of P(VDF-HFP) by NiCl2⋅6H2O nucleating agent(2019-01-02); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Hardness and wear resistance improvement of ABS surface by CrN thin film(2017-01-01); ; This work aims to investigate the effect of sputtering power on the hardness and wear resistance of chromium nitride (CrN) thin films deposited on the acrylonitrile butadiene styrene (ABS) substrates. These coatings were performed by a reactive DC magnetron sputtering technique. The values of sputtering power were adjusted in the range of 125-200 W. The total pressure (P<inf>t</inf>), nitrogen partial pressure (P<inf>N2</inf>), and sputtering time were kept constant at 4×10<sup>-3</sup> mbar, 30%, and 120 min, respectively. The surface roughness of the thin films was characterized by atomic force microscopy (AFM). The crystalline structure of these CrN thin films was studied using X-ray diffraction (XRD). The hardness and Young's modulus of the CrN coated ABS samples were analyzed by a nanoindentation hardness test. Wear resistance tests under ambient air condition at room temperature were carried out by pin-on-disc method. The wear scars of the samples were determined by scanning electron microscope (SEM). The results showed that the hardness values were varied from 6.65 to 9.58 GPa. Young's modulus of the samples was changed from 30.87 to 44.25 GPa. The CrN coating deposited on the ABS substrate at 175 W exhibited the highest hardness of 9.58 GPa which value is as high as that of steel. This indicated its potential and promising applications as hard coating layers for ABS plastic parts. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Microstructure and Electrical Properties of Antimony Telluride Thin Films Deposited by RF Magnetron Sputtering on Flexible Substrate Using Different Sputtering Pressures(2017-05-01); ; The microstructural, electrical, and thermoelectric properties of antimony telluride (Sb<inf>2</inf>Te<inf>3</inf>) thin films have been investigated for thermoelectric applications. Sb<inf>2</inf>Te<inf>3</inf> thin films were deposited on flexible substrate (polyimide) by radiofrequency (RF) magnetron sputtering from a Sb<inf>2</inf>Te<inf>3</inf> target using different sputtering pressures in the range from 4 × 10<sup>−3</sup> mbar to 1.2 × 10<sup>−2</sup> mbar. The crystal structure, [Sb]:[Te] ratio, and electrical and thermoelectric properties of the films were analyzed by grazing-incidence x-ray diffraction (XRD) analysis, energy-dispersive x-ray spectroscopy (EDS), and Hall effect and Seebeck measurements, respectively. The XRD spectra of the films demonstrated polycrystalline structure with preferred orientation of (015), (110), and (1010). A high-intensity spectrum was found for the film deposited at lower sputtering pressure. EDS analysis of the films revealed the effects of the sputtering pressure on the [Sb]:[Te] atomic ratio, with nearly stoichiometric films being obtained at higher sputtering pressure. The stoichiometric Sb<inf>2</inf>Te<inf>3</inf> films showed p-type characteristics with electrical conductivity, carrier concentration, and mobility of 35.7 S cm<sup>−1</sup>, 6.38 × 10<sup>19</sup> cm<sup>−3</sup>, and 3.67 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup>, respectively. The maximum power factor of 1.07 × 10<sup>−4</sup> W m<sup>−1</sup> K<sup>−2</sup> was achieved for the film deposited at sputtering pressure of 1.0 × 10<sup>−2</sup> mbar. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of hydrated salts on the microstructure and phase transformation of poly(vinylidenefluoride-hexafluoropropylene) composites(2018-05-01); Muensit, NantakanThe present work has investigated a means of fabricating porous, β phase P(VDF-HFP) film by adding two kinds of hydrated metal salts. Without the use of mechanical stretching or electrical poling treatments, MgCl<inf>2</inf> •6H<inf>2</inf>O and AlCl<inf>3</inf> •6H<inf>2</inf>O are found to induce the formation of β phase crystals in porous film derived from the solution casting method. Trivalent Al ions have been found to effectively promote the self-oriented β phase of the P(VDF-HFP) film greater than divalent Mg ions. The overall β content is achieved about 38% and 42% for adding 0.25 wt% Mg- and Al-salts, respectively. The average pore sizes and surface roughness of porous P(VDF-HFP) films are increased with increasing salt concentration. The dielectric constant of about 5 for pure P(VDF-HFP) film (at 100 Hz) has been boosted up to 13-19 when adding the salts. In addition, the P(VDF-HFP) films filled with Al-salt exhibit the largest piezoelectric coefficient of 20 pC/N. Thus, the modified polymers are one of candidate materials for using in dielectric and piezoelectric applications. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Excited Discrete Force for Piezo Generator Undergone Ultra-Low Vibrations on Air-Compressor and Possible Application(2019-04-22); Muensit, NantakanThe number of residential buildings in many countries has been fast growing. Comfortable furniture and smart peripheral devices become common for well living in daily life. For example, an electronic wireless switch could be controlled via a mobile phone to open or close home appliances (i.e. light, air-conditioner, security and alarm system), it is so-called »Home Appliances Control». This paper demonstrated a simple-wireless standalone system for the case of the receiver module attached to the compressor unit of the conventional air conditioner. This research proposed an air-compressor as a source of discrete excitations and employed a conventional buzzer as a transducer. The vibration is harvested its mechanical energy to electricity by using a cantilever-type structure glued with the piezoelectric buzzer. The output energy is stored in capacitors thus being consequent as a miniature generator; then, the transmitted data is received by a wireless receiver from the remote transmitter. These result confirmed that the simple cantilever could act as a charger for the connected capacitors which was subsequently an energy source to feed wireless units. In this work, a running air-conditioner produced a charging cycle to capacitors of 3,150 μF within 1 hour. This is sufficient to send and receive the data of atmospheric temperature around the building. This application is useful as a warning sign for inhabitants. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Morphology and dielectric investigations of hydrated-halt P(VDF-HFP) membranes(2017-01-01); Muensit, N.This study focuses on a preparation and characterization of hydrated-salt membranes based on the blend of poly(vinylidene fluoride-hexafluoropropylene) [P(VDF-HFP)] and magnesium chloride (MgCl<inf>2</inf>·6H<inf>2</inf>O). The membranes with MgCl<inf>2</inf>·6H<inf>2</inf>O concentration of 0-4 wt% were prepared by solution casting technique. An elemental composition of the prepared samples was analyzed using energy dispersive x-ray spectroscopy (EDS). The surface morphology and pore size of these membranes were investigated by scanning electron microscopy (SEM). Surface roughness of the as-received membranes was evaluated by atomic force microscopy (AFM). The degree of the crystallinity and phase structures of the P(VDF-HFP) membranes were analyzed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The dielectric and the electrical conductivity of all samples were measured in a range of 1-10<sup>5</sup> Hz. The SEM and AFM images revealed that the formation of the microporous P(VDF-HFP) membranes was controllable by the adjustment of MgCl<inf>2</inf>·6H<inf>2</inf>O content. The surface roughness, pore size and ionic conductivity of the as-received membranes increased with MgCl<inf>2</inf>·6H<inf>2</inf>O concentration. The dielectric constant reached its maximum value of about 25 at 3.5 wt% of MgCl<inf>2</inf>·6H<inf>2</inf>O. The XRD results showed that the mixture of MgCl<inf>2</inf>·6H<inf>2</inf>O salt led to a decrease in the degree of crystallinity. However, the salt-loaded P(VDF-HFP) enhanced the fraction of an electroactive β-phase up to 84% and this was confirmed by the FTIR results. This pointed out that the hydrated-salt P(VDF-HFP) membranes had a potential in new applications such as energy harvesting area. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effects of the electric field and AlCl 3 ⋅6H 2 O salt on the crystal, morphology and dielectric properties of P(VDF-HFP) fibres(2018-12-19);