Muanghlua, Rangson
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Preferred name
Muanghlua, Rangson
Alternative Name
Muanghlua, R.
Muanghlua, Rangsan
Main Affiliation
Email
rangson.mu@kmitl.ac.th
5 results
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Item type:Publication, High Performance Flexible Tribo/Piezoelectric Nanogenerators based on BaTiO3/Chitosan Composites(2021-01-01); ; Natural biopolymer materials have been of interest in wearable energy harvester technology, especially in biocompatible triboelectric nanogenerators (BTENGs), due to their biodegradable, biocompatible, nontoxic and excellent antibacterial properties. Nevertheless, obstacles concerning economical and biocompatible utilization of triboelectric nanogenerators (TENGs) continue to prevail. The natural biopolymer, chitosan (CS), is composed of a long biopolymer chain of N-acetyl glucosamine. It enables exciting opportunities for low-cost, biodegradable triboelectric nanogenerator (TENG) applications. However, the electrical output performance of CS based on TENGs is low when compared with devices constructed from synthetic polymers. Hence, to enhance electrical output performance, BaTiO<inf>3</inf> nano-powders (BT-NPs) were embedded into the CS as dielectric material, in order to improve electrical properties by increasing the dielectric constant of the composite film. A flexible hybrid piezo/triboelectric nanogenerator, designed by BT-NPs embedded into CS (BT-NPs/CS) composite film, was constructed successfully. The effects of the BaTiO<inf>3</inf> nano-powder (BT-NP) content on the output performance were explored systematically. The device with 5 wt% BT-NPs in CS, and a 160-μm-thick film, exhibited maximum open-circuit voltage (V<inf>OC</inf>) and transferred short-circuit current (I<inf>SC</inf>) of 110.8 V and 10 µA, respectively, as well as maximum power output of 431.8 µW. Practical and application demonstrations also were investigated, namely charged capacitors for storing energy, testing voltage stability and driving commercial LEDs. This work exhibited high electrical performance enhancement of BT-NPs/CS nanocomposite film, which demonstrated better material modification. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Sensing layer combination of vertically aligned ZnO nanorods and graphene oxide for ultrahigh sensitivity IDE capacitive humidity sensor(2020-06-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study of Nitride Thickness on Sensitivity IDEs Humidity Sensor Based on Graphene Oxide Sensing(2020-03-01); ; An interdigitaged electrodes (IDEs) humidity sensor was patterned like a combs by lithography process based on silicon bulk substrate with different nitride thickness (50, 100 and 150 nm). This research studied an effect of thick nitride on sensitivity of IDEs humidity sensor based APTES adhesive layer with graphene oxide (GO) sensing material. The IDEs humidity sensor based on GO was comparatively examined all thick nitride conditions. Capacitance value of fresh IDEs humidity sensor shown not significant change all nitride thickness but it affected to sensitivity after GO coating due to high GO densified onto IDEs surface. Scanning Electron Microscope (SEM) was analyzed GO distribution and surface morphology. Raman spectroscopy clearly revealed the GO presence. The sensitivity from 50 to 80 %RH for optimal 100 nm thick nitride shows improvement to 2.78 and 1.27 times or 278.35% and 127.46% based on 50 and 150 nm thick nitride, respectively. Furthermore, the optimal condition of IDEs humidity sensor shows a little response and recovery times (11 and 7 sec), low hysteresis (3.21%), fine repeatability as well as high accuracy on long-term ability test. It clearly demonstrated for high sensitivity of nitride IDEs humidity sensor based on GO sensing film deposition. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Acidic dynamics: Unveiling mechanistic insights for improved performance in chitosan triboelectric nanogenerators(2024-07-01)1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Utilization of commodity thermoplastic polyethylene (PE) by enhanced sensing performance with liquid phase electrolyte for a flexible and transparent triboelectric tactile sensor(2021-04-01); ; To promote the sustainable development of single-used polyethylene (PE) commodity plastic for long-lasting use in advanced electronic devices, this work presented a successful strategy for converting PE plastic bags, which usually end up in landfills, into specifically flexible and transparent triboelectric tactile sensors (TES). In order to enhance the electrical output to meet the practical application, liquid phase electrolytes (LPEs) were introduced between double sides of thin PE layers. LPE utilization had significant influence on the output signal, resulting in an effective response to physical contact with the human hand. The effect of LPE types, i.e., acids, salts and solvent as well as concentration, on output signal was studied and clarified. The scientific working mechanism for PE/LPE TES was described based on the coupling behavior between contact electrification, electrostatic induction and ion conduction within the electric double layer. The PE/LPE TES showed the optimized signal response of V<inf>oc</inf> ~1.6 V, I<inf>sc</inf> ~673 nA and 450 W/cm<sup>2</sup>, enabled by tunable LPE types and concentrations, thus providing a hundred times more than that of pristine PE. By integrating PE/LPE TES with a signal-processing circuit, wireless application of the complete tactile sensing system has been developed further to make contact with and control home appliances such as a light bulb and an electric fan. Its flexibility and transparency has great potential adaptation for the active tactile system that can be attached to different wearable devices, textiles, or home interior decoration. This work demonstrates a facile strategy for promoting PE plastic as a high value-added electronic product that has the potential to pave the way for development in large-scale industry, and help in treating used plastic in the future. It also has the opportunity to obtain a tactile sensor that is affordable and cost-effective in making a valuable contribution in the global sensor market, thus ensuring sustainable development in both social and economic terms.1