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RISS 인기검색어
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- 저자 : Junfang Ren (검색결과 2 건)
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Controllable Preparation of Zeolite-P/Calcined Diatomite with MgCl2
Guo Zhengzheng,Ren Zijie,Gao Huimin,Guan Junfang,Li Peiyue,Zheng Renji,Yin Hang,Chen Zhijie 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.6
Developing highly effi cient calcined diatomite (C-D)-based fi lter aids with excellent adsorption performance is of great signifi cance. Herein, Zeolite-P was successfully synthesized on the surface of C-D through hydrothermal modifi cation with NaOH and MgCl 2 as effi cient morphology control agents. The optimal Zeolite-P/C-D material perfectly retained the diatomite structure and showed a whiteness of 83.36% and a high specifi c surface area of 237.47 m 2 /g, leading to an excellent adsorption capacity for methylene blue trihydrate (MB) of 125.46 mg/g and a good permeability of 0.43 darcy. The porous fi brous microspheres Zeolite-P was synthesized on the surface of C-D under controlled conditions to improve the adsorption performance of Zeolite-P/C-D material. By developing diatomite-based composites for fi lter aids applications, this study paves the way for the comprehensive and effi cient utilization of low-cost diatomite resources.
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Ultrathin Biocompatible Electrospun Fiber Films for Self-Powered Human Motion Sensor
Gengrui Zhao,Shaobo Gong,Honggang Wang,Junfang Ren,Na Wang,Yawen Yang,Gui Gao,Shengsheng Chen,Linlin Li 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.8 No.3
In recent years, triboelectric nanogenerator (TENG) has been proven to be an effective and simple solution for self-powered wearable sensing, and a wide variety of materials and methods have been applied to TENG based sensors. In this study, an ultrathin fiber film with nanoporous brain-like structure (BUF) was obtained by cold-pressing the electrospun biocompatible fiber mats, and a wearable TENG sensor based on the BUF films that could sensitively detect human motion was demonstrated. This simply designed self-powered sensor was composed of Kapton as the shell and ultrathin, biocompatible poly L-lactic acid and ethyl cellulose (EC) fiber films as the triboelectric layers, prepared by convenient electrospinning method and cold-pressing. Compared to as-spun fiber mats, cold-pressed fiber membranes not only acquire overall compact structure but also remained porous surface morphology, which improved the triboelectric outputs and operational stability of TENG. Three TENGs were fabricated to evaluate the effects of different triboelectric layers on triboelectric outputs, and the BUF-TENG had the maximum triboelectric outputs (19 V, 630 nA at 3.5 Hz) and longer life than as-spun fiber mats based TENG. The BUF-TENG had linear relationship between triboelectric outputs and frequency, and sensitivities of 32.4, 0.94 and 0.22 V Hz−1 in the range of 0.1–0.35, 0.35–2 and 2–3.5 Hz, respectively. Moreover, a self-powered sensor based on the BUF-TENG was proposed to sensitively detect human walking state and limbs motion. With convenient preparation process and biocompatible materials, the BUF-TENG sensor could be a potential self-powered wearable and portable sensor in future health care and monitoring field.
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