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Influence of different silica gelling agents on the performance of aqueous gel electrolytes
Changyu Lu,Tuan K.A. Hoang,The Nam Long Doan,The Nam Long Doan,Matthew Acton,WEISHENG GUAN,P. Chen 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.42 No.-
In this study, gel electrolytes are prepared from silica gelling agents and aqueous electrolyte forapplication in the rechargeable hybrid aqueous battery for the first time. The required quantities of silicamaterials are in the range of 4–15 wt.%. The gelling time is in the magnitude of minutes and the ionicconductivities of gel electrolytes are in the range of 50.6–60.6 mS cm 1. These batteries using these gelelectrolytes exhibit higher rate capability, slower self-discharge (ca.15% after 24 h), and up to 10–12%higher cyclability compared with the performance of the batteries using the conventional liquidelectrolyte.
Chien Minh Tran,Ngoc Thi‑Thanh Nguyen,Minh Hieu Ho,Vinh Khanh Doan,Khanh Loan Ly,Nhi Ngoc‑Thao Dang,Nam Minh‑Phuong Tran,Hoai Thi‑Thu Nguyen,Long Phuoc Truong,Thai Minh Do,Quyen Ngoc Tran,Hien Quoc Ng 한국섬유공학회 2023 Fibers and polymers Vol.24 No.1
In this study, we proposed a straightforward electrospun polycaprolactone (PCL) loaded with silver nanoparticles (SNPs)membrane fabrication process, in which SNPs were directly synthesized from silver nitrate (AgNO3) in PCL–acetone mixtureby gamma irradiation. The insolubility of AgNO3in PCL solution was solved using an auxiliary dimethyl sulfoxide solvent. As a physical approach, gamma rays readily converted silver ions into SNPs without the addition of harmful reductionagents, which reduced the cytotoxicity of the synthesized material. By avoiding some processes such as purification, solventremoval, or redispersion of SNPs, this method was more time-saving compared to other related studies. SNPs formation wasconfirmed by both UV–Visible spectrum (UV–Vis) and X-ray diffraction analysis. Scanning electron microscopy (SEM)revealed that the addition of SNPs significantly reduced the fiber diameter of PCL–Ag membranes compared to that of rawPCL. Uniform spherical-shaped SNPs incorporated in PCL fibers were observed under transmission electron microscopy(TEM). The tensile test showed that the electrospun PCL–Ag membranes exhibited good mechanical characteristics. Moistureeasily penetrated the porous microstructure of PCL–Ag, facilitating wound humidity regulation. Inductively coupledplasma-mass spectroscopy (ICP-MS) was employed to study the release profiles of SNPs at different time intervals. Overall,the PCL–Ag 500 ppm sample exerted excellent antibacterial activity against Pseudomonas aeruginosa and Staphylococcusaureus strains and low in vitro cytotoxicity.