INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Yihan Yin,Zhiyong Cao,Hongxia Gao,Teerawat Sema,Yanqing Na,Min Xiao,Zhiwu Liang,Paitoon Tontiwachwuthikul
A poly(tetrafluoroethylene) hollow-fiber membrane contactor was used for CO2 absorption in tertiary amine solutions. Several influential factors were studied including the flow rate, concentration, temperature, CO2 loading of the absorbent and CO2 partial pressure, and velocity of mixed gas. Based on the finite elemental analysis method, a two-dimensional steady-state mathematical model was established using COMSOL Multiphysics simulation software to calculate CO2 mass transfer flux (JCO2) and CO2 concentration distribution in the hollow-fiber membrane contactor under nonwetting and partial-wetting conditions. Results show that the mass transfer was severely reduced in the partially wet membrane, and the predicted JCO2 under 15% membrane wetting agreed well with the experimental value. In addition, a dimensionless equation was developed to predict the liquid phase, gas phase, and membrane phase mass transfer coefficients and JCO2. The calculated JCO2 values are in good agreement with the experimental values with an average absolute relative deviation (AARD) of 9.4%.
研究领域:
化学工程
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Haoran Bai,Shengyi Yang,Zhenhua Ge,Mingzhu Liu,Mingdong Hong,Ruomin Pang,Xinbing Song,Yurong Jiang,Bingsuo Zou,Libin Tang
Narrow bandgap colloidal quantum dots (CQDs) are ideal materials for realizing high-sensitivity infrared photodetectors. Their use is an effective way to improve the external quantum efficiency (EQE) by utilizing the photomultiplication (PM) effect to achieve highly sensitive photodetection. How to improve the device performance by photomultiplication is still the hot topic in this field. In this work, a simple method of inserting a gold nanoparticles (Au-NPs) film into the PbS QDs active layer to enhance light absorption for the PM-type photodetector ITO/ZnO/PbS/Au-NPs/PbS/P3HT/Ag is presented. In this case, Au-NPs act as the hole traps to induce the tunneling injection of external electrons. As a result, a high responsivity of 1088.86 A W−1 with a high EQE of 138 066% and a specific detectivity (D*) of 1.2 × 1014 Jones is observed from the PM-type photodetector ITO/ZnO(80 nm)/PbS(110 nm)/Au-NPs(4 nm)/PbS(110 nm)/P3HT(140 nm)/Ag under 0.2 μW cm−2 980 nm illumination at −1 V. Furthermore, the device configuration of the photodetector is optimized with the help of COMSOL simulation, and its maximum absorption reaches 91%. In addition, the feasibility of enhancing light absorption through the plasmonic effect has been confirmed by simulating the electric field distribution and carrier distribution within the photodetector.
研究领域:
光电子学
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纳米技术
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光子学
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材料科学
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半导体器件
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2024
·Vol. 81
·期 12
·10645-10657
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IF 3.1
Sun Wu-Ji,Liu Xiong-Jun,Yuan Li-Juan,Xiao Han,Lu Jian-Mei
High voltage AC/DC cables require thicker insulation to ensure excellent insulation performance. Selecting the appropriate crosslinker to design the crosslink and crystalline structure of XLPE is key to the insulating properties. Although the crystallinity of XLPE has been extensively studied by using X-ray diffraction and differential scanning calorimeters, few researchers have designed in situ experiments to observe its structure. In this paper, we have created an in situ observational experiment to monitor the structural changes of XLPE insulation. XLPE formed by DTAP crosslinker produces lower gas byproducts, which can effectively reduce the degassing time and energy consumption. The test results and COMSOL simulations indicate that the XLPE formed by straight-chain alkane crosslinkers has better mechanical, thermal and electrical insulating properties than cyclic alkane crosslinkers. Our work is of great significance for selecting suitable crosslinker to control the structure of XLPE and determining the production conditions for high-voltage cables.
研究领域:
材料科学
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高分子科学
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电气工程
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 14
·2308127
·
IF 13.3
Hongsen Niu,Hao Li,Qichong Zhang,Eun-Seong Kim,Nam-Young Kim,Yang Li
Developing electronic skins (e-skins) with extraordinary perception through bionic strategies has far-reaching significance for the intellectualization of robot skins. Here, an artificial intelligence (AI)-motivated all-fabric bionic (AFB) e-skin is proposed, where the overall structure is inspired by the interlocked bionics of the epidermis-dermis interface inside the skin, while the structural design inspiration of the dielectric layer derives from the branch-needle structure of conifers. More importantly, AFB e-skin achieves intuition sensing in proximity mode and tactile sensing in pressure mode based on the fringing and iontronic effects, respectively, and is simulated and verified through COMSOL finite element analysis. The proposed AFB e-skin in pressure mode exhibits maximum sensitivity of 15.06 kPa −1 (<50 kPa), linear sensitivity of 6.06 kPa −1 (50–200 kPa), and fast response/recovery time of 5.6 ms (40 kPa). By integrating AFB e-skin with AI algorithm, and with the support of material inference mechanisms based on dielectric constant and softness/hardness, an intelligent material perception system capable of recognizing nine materials with indistinguishable surfaces within one proximity-pressure cycle is established, demonstrating abilities that surpass human perception.
研究领域:
机器人技术
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人工智能
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材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）