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Won-Hsion Liao

Bio: Won-Hsion Liao is an academic researcher from Taoyuan Innovation Institute of Technology. The author has contributed to research in topics: Molding (process) & Ultimate tensile strength. The author has an hindex of 8, co-authored 8 publications receiving 178 citations.

Papers
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TL;DR: In this article, micro-injection molding was applied to a micro-featured fluidic platform used for DNA/RNA testing, and the width and depth of the micro-channels within the molded devices were measured and analyzed.

45 citations

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TL;DR: In this paper, a foaming control system using Gas Counter Pressure (GCP) combined with mold temperature control in the microcellular foaming (MuCell) process was developed.

36 citations

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TL;DR: In this article, the effects of inserted film on the asymmetric mold temperature field of IMD injection molding process for polypropylene (PP) parts were investigated under various conditions of mold temperature, melt temperature and film thickness.

36 citations

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TL;DR: In this paper, the magneto-hydrodynamic (MHD) Reynolds-type equation for squeezing-film curved annular disks is derived using the continuity equation and the MHD motion equations.
Abstract: The analysis of squeeze‐film performances between curved annular plates with an electrically conducting fluid in the presence of a transverse magnetic field is presented in this study. The magneto‐hydrodynamic (MHD) Reynolds‐type equation for squeezing‐film curved annular disks is derived using the continuity equation and the MHD motion equations. A closed‐form solution for the squeezing film pressure is obtained, and applied to predict the MHD squeeze‐film characteristics. According to the results obtained, the presence of applied magnetic fields signifies an increase in the MHD squeeze‐film pressure. Compared with the classical non‐conducting‐lubricant case, the magnetic‐field effect characterized by the Hartmann number provides an enhancement to the MHD load‐carrying capacity and the response time, especially for larger values of the curved shape parameter or smaller values of inner‐outer radius ratio of the curved annular disks.

27 citations

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TL;DR: In this paper, three different rib and closure organization of the reinforcement structures were designed and injection molded under blends of varying proportions of the ABS recycled resins to do the torsion test by Air-Torsion tools.
Abstract: Reuse of recycled polymers is steadily increasing. In this study, two different ABS virgin materials are considered. Then, blends of varying proportions of ABS recycled resins (0–50%), obtained from the gate and runner materials of products, was added to virgin resin to investigate the effect of various compositions of virgin ABS and recycled polymers on the physical and mechanical properties of the final blend. Three different rib and closure organization of boss of the reinforcement structures were designed and injection molded under blends of varying proportions of the ABS recycled resins to do the torsion test by Air-Torsion tools. In addition, molding characteristics were also examined. The results show that there is no obvious effect of recycled ABS percentage (by weight) on the tensile strength, elongation at yield, flexural strength, flexural modulus, and impact strength. However, the torsion strength for rib and closure organization of boss of the reinforcement structures decrease with increasing...

20 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present the main significant developments that have been achieved in different aspects of micro-injection molding of microfluidic devices, including device design, machine capabilities, mold manufacturing, material selection and process parameters.
Abstract: Microfluidic devices have several applications in different fields, such as chemistry, medicine and biotechnology. Many research activities are currently investigating the manufacturing of integrated microfluidic devices on a mass-production scale with relatively low costs. This is especially important for applications where disposable devices are used for medical analysis. Micromoulding of thermoplastic polymers is a developing process with great potential for producing low-cost microfluidic devices. Among different micromoulding techniques, micro-injection moulding is one of the most promising processes suitable for manufacturing polymeric disposable microfluidic devices. This review paper aims at presenting the main significant developments that have been achieved in different aspects of micro-injection moulding of microfluidic devices. Aspects covered include device design, machine capabilities, mould manufacturing, material selection and process parameters. Problems, challenges and potential areas for research are highlighted.

445 citations

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TL;DR: In this paper, the authors reviewed the recent progress on recycling polymeric waste form some traditional polymers and their systems (blends and composites) such as polyethylene (PE), polypropylene (PP), and polystyrene (PS), and introduced the mechanical and chemical recycling concepts.

343 citations

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TL;DR: In this paper, the microcellular structure and crystallization behavior of polylactide composite foams were characterized using scanning electron microscopy and differential scanning calorimetry, and the results showed that the presence of nanoclay and talc together with the expedited crystallization enhanced the PLA foams morphology with a finer and more uniform cell structure.

149 citations

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TL;DR: In this article, plastic waste is upcycled into 3-D printing filament with a recyclebot, which is an open source waste plastic extruder, combined with an open-source self-replicating rapid prototyper (RepRap) 3D printer, to enable post-consumer ABS plastic filament from computer waste to be further up cycled into valuable consumer products pre-designed in the digital commons.
Abstract: A promising method of enhancing the circular economy is distributed plastic recycling. In this study plastic waste is upcycled into 3-D printing filament with a recyclebot, which is an open source waste plastic extruder. The recyclebot is combined with an open source self-replicating rapid prototyper (RepRap) 3-D printer, to enable post-consumer ABS plastic filament from computer waste to be further upcycled into valuable consumer products pre-designed in the digital commons. The total electrical energy consumption for the combined process is monitored and an economic evaluation is completed. The coupled distributed recycling and manufacturing method for complex products reduces embodied energy by half, while reducing the cost of consumer products to pennies. This economic benefit provides an incentive for consumers to both home recycle and home manufacture, which tightens the loop on the circular economy by eliminating waste associated from transportation and retail. It is clear from the results that waste plastic can be significantly upcycled at the individual level using this commons-based approach. This tightening of the loop of the circular economy benefits the environment and sustainability as well as the economic stability of consumers/prosumers.

148 citations

Journal ArticleDOI
Byeonggwan Kim1, Haijin Shin1, Teahoon Park1, Hanwhuy Lim1, Eunkyoung Kim1 
TL;DR: Efficient visible to near-infrared absorption, photon to heat, and heat to electric conversion has been realized in one film that could benefit in exploiting multifunctional film displays, invisible NIR sensors, photodynamic theragnosis, and thermoelectric devices.
Abstract: Electrochromism, photothermal effect, and thermoelectric properties of hexyl-derivatized poly(3,4-ethylenedioxyselenophene) are investigated by precisely controlling the morphology. These properties are clearly demonstrated by controlling the applied electrical potential of the polymer films. Especially, the doped polymer film at -0.1 V reveals the highest photothermal conversion efficiency and a power factor of 42.5% and 354.7 μW m(-1) K(-2) , respectively. Efficient visible to near-infrared absorption, photon to heat, and heat to electric conversion has been realized in one film that could benefit in exploiting multifunctional film displays, invisible NIR sensors, photodynamic theragnosis, and thermoelectric devices.

120 citations