yrammuS 要概90Manunya OKHAWILAI91Manaswee SUTTIPONG92Yotwadee HAWANGCHUDevelopment of polyacrylonitrile/bio-related polyurethane electrospun fiber mats as separator in Zn-ion battery(Project 2021)Improvement of Aqueous Zinc-Ion Battery Performance by Combining Experiments and Molecular Dynamics Simulations(Project 2021)Characterization and product distribution via thermal conversion of abandoned, lost or otherwise discarded fishing gear (ALDFG) waste(Project 2021)69Rep. Grant. Res., Asahi Glass Foundation (2022)This research aims to fabricate polyacrylonitrile (PAN)/bio-based polyurethane (bio-based PU) separator for Zn-ion battery. PAN/bio-based PU electrospun fiber mats at 75/25 were prepared via electrospinning technique using Taguchi experimental design with three parameters and four levels. It was found that all fiber mats illustrated smooth and continuous fiber. The properties of the electrospun fiber mats were optimized in accordance to grey relational method. Furthermore, the fiber mats prepared from 14 wt% polymer concentration, 25 kV of applied voltage, and 16 cm of distance from tip to collector were determined to be the most suitable fabrication condition exhibiting an ionic conductivity of 3.11 mS/cm, tensile strength of 44.16 MPa, and electrolyte uptake of 1,971%. Thus, the PAN/bio-based PU electrospun fiber can be considered a promising candidate as a separator for Zn-ion battery.Molecular dynamics (MD) simulations were performed to investigate structural and dynamical properties of ions in aqueous zinc sulfate (ZnSO4) electrolyte at various concentrations, with and without 0.1 M manganese sulfate (MnSO4) additive. The simulation results showed the effects of ZnSO4 concentration and addition of MnSO4 additive on solvation structure of Zn2+ ions. At low concentrations of ZnSO4, Zn2+ ions were coordinated by six water molecules. The addition of MnSO4 resulted in a strong interaction between Zn2+ ions and water molecules, particularly at 2.0 M ZnSO4. The self-diffusion coefficients and ionic conductivities of ions obtained for the systems of ZnSO4 (at 0.1, 0.5, and 1.0 M) with adding MnSO4 were higher than those without MnSO4. However, at 2.0 M ZnSO4, the addition of MnSO4 resulted in decreasing the self-diffusion coefficients and ionic conductivities of ions. As compared with experiments, the trend of ionic conductivity was in good agreement with MD simulations.Abandoned, lost or otherwise discarded fishing gear (ALDFG) is a serious growing concern globally due to the numerous critical impacts on environment and economic. The general treatment of this waste has been incineration for energy recovery and disposed in landfill in which the latter is prohibitive from desperate shortage and a severe damage to the environment. For resource recovery and recycling, thermal conversion route has the great potential to generate fuels, chemicals, and synthesis gas. To analyze the effect of pyrolysis temperature on product selectivity, fishing net wastes (FN) were pyrolyzed at 400-700 ºC using Py-GCMS instrument. FN were collected from 4 sites in the Gulf of Thailand noted as KFN, LFN, MFN, and UFN. Functional group and thermal decomposition of FN were studied using FTIR and TGA. The pyrolytic products were categorized according to its chemical species. Observed functional group of FN indicated signal of amide linkage (-CO-NH-) of KFN, LFN, and MFN that corresponding to polyamide (PA) as raw materials. While UFN, signal of -CH- stretching of aliphatic structure of polyethylene (PE) were observed.
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