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SSrN 2023年

作者： Lin, Yu-Fei Fang, Yin-Xin Xu, Zhen-Liang ren, Tian-Xiang Xu, Sun-Jie Pandaya, dibakar State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology 130 MeiLong Road Shanghai200237 China

SUZ-4 zeolite is a needle-like material with an oriented pore structure that has potential for separation. It is desired to prepare high-performance thin film composite (TFC) membranes via the interfacial polymerization (IP) process after incorporating SUZ-4 zeolite interlayers on macroporous ceramic hollow fibers to compensate for the surface defects. However, the incomplete coverage of the needle-like zeolite for the surface seriously affects the performance of the formed membranes. The spatial confinement property of graphene oxide (GO) was used to modify the SUZ-4 zeolite to the SUZ-4(G) zeolite with hierarchical stacked structures and larger size. SUZ-4(G) zeolite achieved sufficient coverage of the alumina substrate and obtained TFC membranes with good performance for isopropanol (IPA) dehydration under the one-pass IP process. The TFC membrane after further optimization displayed a flux of 3.18±0.1 kg/(m2·h) with a separation factor of 3034±98 applied to pervaporation (PV) dehydration of 90 wt% IPA aqueous solution at 60°C. Additionally, the novel TFC membrane developed has the potential for further applications due to its good stability. © 2023, The Authors. All rights reserved.

关键词： Zeolites

Loss-induced phase transition in mid-infrared plasmonic metamaterials for ultrasensitive vibrational spectroscopy

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InfoMat 2022年第12期4卷 85-102页

作者： Hong Zhou dongxiao Li Zhihao ren Xiaojing Mu Chengkuo Lee Department of Electrical and Computer Engineering National University of SingaporeSingaporeSingapore Key Laboratory of Optoelectronic Technology&Systems of Ministry of Education International R&D center of Micro-nano Systems and New Materials TechnologyChongqing UniversityChongqingPeople's Republic of China Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingaporeSingapore National University of Singapore Suzhou Research Institute(NUSRI) SuzhouPeople's Republic of China NUS Graduate School—Integrative Sciences and Engineering Programme(ISEP) National University of SingaporeSingaporeSingapore

Metamaterials have proven their ability to possess extraordinary physical properties distinct from naturally available materials,leading to exciting sensing functionalities and ***,metamaterial-based sensing applications suffer from severe performance limitations due to noise interference and design ***,we propose a dual-phase strategy that leverages loss-induced different Fano-resonant phases to access both destructive and constructive signals of molecular *** the two reverse signals are innovatively combined,the noise in the detection system is effectively suppressed,thereby breaking through the noise-related ***,by utilizing loss optimization of the plasmon-molecule coupling system,our dual-phase strategy enhances the efficiency of infrared energy transfer into the molecule without any additional fabrication complex,thereby overcoming the trade-off dilemma between performance and fabrication *** to the pioneering breakthroughs in the limitations,our dual-phase strategy possesses an overwhelming competitive advantage in ultrasensitive vibrational spectroscopy over traditional metamaterial technology,including strong signal strength(×4),high sensitivity(×4.2),effective noise suppression(30%),low detection limit(13 ppm),and excellent selectivity among CO_(2),NH_(3),and CH_(4) *** work not only opens the door to various emerging ultrasensitive detection applications,including ultrasensitive in-breath diagnostics and high-information analysis of molecular information in dynamic reactions,but also gains new insights into the plasmon-molecule interactions in advanced metamaterials.

关键词： Fano resonance Ir vibrational spectroscopy metamaterials phase transition ultrasensitive sensing

Polyamide Infiltration Phenomenon on Micropore Support reduced by Covalent Organic Frameworks Net for Faster desalination

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SSrN 2023年

作者： Fang, Yin-Xin Lin, Yu-Fei Xu, Zhen-Liang dai, Jia-Yue Pandaya, dibakar State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China

Covalent organic frameworks (COFs) are a new periodic porous crystalline material, that has nano pore sizes. Herein, a novel COFs MPdTp was introduced into nylon micropore substrate to reduce polyamide (PA) infiltration condition for highly permselective nanofiltration (NF). The resultant PA-COF/nylon membrane was achieved after twice interfacial polymerization (IP) processes. The first was the introduction of COFs, and the second was the preparation of PA selected layer. The optimal membrane showed outstanding pure water permeance (PWP) of 27.3 L m-2 h-1 bar-1, which was about three times larger than the PA/nylon membrane, and rejection of 98.4% for Na2SO4. The excellent performance was benefit from the existence of COFs, on the one hand, the COFs on the surface and inside could be seem as a net which prevented PA infiltration and blockage. On the other hand, a thinner PA separation layer was generated due to the slower piperazine (PIP) diffusion rate, which was also certified by molecular dynamics (Md) simulation. Therefore, this work not only demonstrates the high application value for desalination of the PA-COF/nylon membrane, but also provides a new strategy to adjust the relationship between the microporous substrate and the PA layer. © 2023, The Authors. All rights reserved.

关键词： Nanofiltration

Novel Tfc Membrane with Crosslinked Pmia Active Layer Fabricated by the T-Flo Technique for dye desalination

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SSrN 2023年

作者： Li, Ping-Ping Xu, Zhen-Liang Fang, Yin-Xin Pandaya, dibakar Gao, Ling-Lin ding, rui State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China

Poly (m-phenyleneisophthalamide) (PMIA) is a promising candidate for membrane material resulting from its excellent thermal and chemical stability. Being the linear molecular structure, almost all studies have been carried out on PMIA as a substrate material for thin-film composite (TFC) membranes rather than an active layer. Here, amino-epoxide crosslinkers were introduced into the PMIA dope solution to modify the molecular structure for the first time. Employing the casting coupled solvent evaporation deposited the crosslinked PMIA (CPMIA) thin-film. The effect of crosslinker type and concentration on the morphology and the ion permeance have been investigated systematically. That is, achieving the separate optimization of the active layer. Based on the CPMIA thin-film with the best ion permeation, novel TFC membranes (TFC-CPE) with CPMIA active layer were generated successfully via the thin-film liftoff (T-FLO) technique for the first time. result demonstrates that TFC-CPE had desirable dye desalination performance. For feeding solution containing 100 ppm Cr and 1 g L-1 NaCl, the permeance was 25.17 L m-2 h-1 bar-1. Cr rejection was 99.88% and NaCl rejection was 6.30%. The selective coefficient α was up to 793.9. It also demonstrated that the TFC-CPE had excellent thermal resistance, anti-fouling capability and long-term stability. In conclusion, the novel TFC membrane has a promising future for in-situ dye wastewater treatment. This work throws light on the PMIA modification and the preparation of the TFC membrane with a novel active layer. © 2023, The Authors. All rights reserved.

关键词： Thin films

Go-Modified SUZ-4 Zeolite with Hierarchical Stacked Structures Improving Thin-Film Composite Membrane Performance for the Ipa Pervaporation dehydration

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SSrN 2023年

SUZ-4 zeolite is a needle-like material with an oriented pore structure that has potential for separation. It is desired to prepare high-performance thin film composite (TFC) membranes via the interfacial polymerization (IP) process after incorporating SUZ-4 zeolite interlayers on macroporous ceramic hollow fibers to compensate for the surface defects. However, the incomplete coverage of the needle-like zeolite for the surface seriously affects the performance of the formed membranes. The spatial confinement property of graphene oxide (GO) was used to modify the SUZ-4 zeolite to produce hierarchical stacked structures with larger size. GO-SUZ-4 zeolite achieved sufficient coverage of the alumina substrate and obtained TFC membranes with good performance for isopropanol (IPA) dehydration under the one-pass IP process. The TFC membrane after further optimization displayed a flux of 3.18±0.1 kg/(m2·h) with a separation factor of 3034±98 applied to pervaporation (PV) dehydration of 90 wt% IPA aqueous solution at 60°C. Additionally, the novel TFC membrane developed has the potential for further applications due to its good stability. © 2023, The Authors. All rights reserved.

关键词： Evaporation

Crosslinked Pmia Thin-Film Composite Membrane with Excellent dye desalination Performance Fabricated Via the T-Flo Technique

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SSrN 2023年

作者： Li, Ping-Ping Xu, Zhen-Liang Fang, Yin-Xin Gao, Ling-Lin ding, rui State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology 130 Meilong Road Shanghai200237 China

It has illustrated that fabricating poly (m-phenyleneisophthalamide) (PMIA) thin-film composite (TFC) membranes via the T-FLO technique is feasible. However, its dye desalination performance is undesirable. To enhance the dye desalination performance of the PMIA-based TFC membrane, introducing crosslinkers (amine and epoxide monomers) into the PMIA dope solution for the first time. Novel crosslinked PMIA thin-films (CPMIA) were generated. The effect of crosslinker type and concentration on the morphology and the ion permeance have been investigated systematically. After facilitating the T-FLO technique, novel TFC membranes with CPMIA active layers were obtained. The optimized TFC membranes (TFC-PE) showed fantastic dye desalination performance. For feeding solution containing 100 ppm Cr and 1 g/L NaCl, the permeance was 25.17 L·m-2·h-1·bar-1, Cr and NaCl rejection was 99.88% and 6.30%. The selective coefficient [[EQUATION]] was up to 793.9. Besides, the thermal resistance, anti-fouling capability, and long-term stability were discussed. In conclusion, the obtained CPMIA TFC membranes show a promising future for dye desalination. © 2023, The Authors. All rights reserved.

关键词： Thin films

Sulfonated graphene oxide linked with alkali metal ions membranes for proton conductivity in hydrogen production from water electrolysis

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Journal of Membrane Science 2024年 705卷

作者： Subrahmanya, T.M. Jo Chi, Yang Nayak, Smrutiranjan Habetamu Abebe, Shalligito Hung, Wei-Song Kadja, Grandprix T.M. Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Center for Catalysis and Reaction Engineering Institut Teknologi Bandung Jl. Ganesha No. 10 Bandung40132 Indonesia R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

Amid technological advances, rising energy demand, and environmental concerns, countries endorse green energy solutions. Prominent among them is hydrogen production via clean water electrolysis, a key strategy for sustainable development. Herein, to address the limitations of expensive and potentially harmful Nafion membranes, we have developed a new graphene oxide (GO) series membranes (hydrophilic sulfonated GO (GO-SO3H) linked with monovalent alkali metal ions were synthesized to fabricate the membranes) to be used in water electrolysis for hydrogen production by introducing the iodide oxidation reaction (IOr) as an alternative to the traditional oxygen evolution reaction (OEr). Various modifications by sulfuric acid, methanol, and different alkali metal hydroxides (LiOH, NaOH, KOH) result in membranes with distinct properties. Characterization techniques, including ATr-FTIr, SEM, AFM, Xrd, water contact angle (WCA), and electrochemical impedance spectroscopy (EIS), validated the modifications, assessed membrane morphology, interlayer spacing, hydrophilicity, and electrical properties. Among the membranes, GO-SO3K stood out, exhibiting the highest proton conductivity (119.16 mS) and superior potassium ion permeability (20.382 cm/s). Importantly, all GO series membranes demonstrate excellent stability in the electrochemical system. The findings suggested that GO-SO3K holds promise as a potassium ion-conductive membrane for efficient and sustainable hydrogen production, offering a viable alternative to conventional Nafion membranes in water electrolysis applications. © 2024

关键词： Hydrogen production

Suz-4 Zeolite Interlayer Enhanced Thin-Film Composite Pervaporation Membrane for Ethanol dehydration

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SSrN 2023年

作者： Lin, Yu-Fei Fang, Yin-Xin Xu, Zhen-Liang Taymazov, dovletjan State Key Laboratory of Chemical Engineering Membrane Science and Engineering R&D Lab Chemical Engineering Research Center School of Chemical Engineering East China University of Science and Technology 130 MeiLong Road Shanghai200237 China

SUZ-4 zeolite is a needle-like porous material with potential in separation. By incorporating a SUZ-4 zeolite interlayer on the macroporous ceramic hollow fibers to remedy the defects on the surface, thin-film composite (TFC) membranes with better pervaporation (PV) performance were expected to be prepared by interfacial polymerization (IP) processes. Through relevant experiments and characterization, high performance SUZ-4 zeolite interlayer enhanced TFC membranes were obtained by incorporating a zeolite interlayer and undergoing two-pass IP process. In addition, the TFC membrane had a special structure in which the inner layer was a nesting of polyamide and zeolite crystals, while the outer layer was a polyamide layer wrapping the inner layer. The structure of the inner layer similar to the mixed matrix membrane allowed the properties of the SUZ-4 zeolite to be utilized, whose performance was significantly better than the TFC membrane without the zeolite interlayer. After further optimization, the SUZ-4 enhanced TFC membrane exhibited a flux of 3.18±0.3 kg/(m2·h) with a separation factor of 1056±150 when applied to the pervaporation of 90 wt% ethanol dehydration at 60°C. Moreover, the developed novel TFC membranes maintained good stability, which indicated these membranes possess great potential for pervaporation dehydration. © 2023, The Authors. All rights reserved.

关键词： Zeolites

Fluorine-Free Paraffin Binder-Based dry Thick Electrodes Toward Sustainable and Efficient Battery Manufacturing

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SSrN 2024年

作者： Kim, Min Kyung Yu, Taegyun Jang, Sungbin Lee, Juho Jang, Min Oh, Hyeseong Cha, Hyungyeon Lee, Huiyeol Kang, Joonhee Lee, Seung Min Shim, Hyeongseok Lee, Kwon-Hyung Song, Gyujin Jin, Wooyoung Kim, Tae-Hee Jeong, Kyeong-Min Han, Joong Tark Yoo, Jung-Keun Song, Sanghyun Park, Myoungkeon Seong, Jinwoo Kim, dongoh Choi, Hyunwoo Seong, Minjong Lim, Min Jin Hwang, Wook ryol Nam, Jieun Jo, Sanghoon Kim, Jinsoo Ulsan Advanced Energy Technology R&D Center Korea Institute of Energy Research Ulsan Korea Republic of Department of Nano Fusion Technology Pusan National University Busan Korea Republic of Department of Organic Material Science and Engineering Pusan National University Busan Korea Republic of Ulsan Korea Republic of Changwon Korea Republic of Changwon Korea Republic of Seoul Korea Republic of R&D Center Rechargeable Battery Division Hanwha Momentum Seongnam Korea Republic of School of Mechanical Engineering Gyeongsang National University Jinju Korea Republic of R&D Center Yunsung F&C Co. Ltd. Anseong Korea Republic of Multiphysics Digital Twin Lab Trinity Engineering Seoul Korea Republic of

dry electrodes are being actively developed for sustainable and efficient battery manufacturing. Currently, polytetrafluoroethylene (PTFE) binders dominate dry processes, yet their production contributes to significant CO2 emissions, and concerns persist regarding their high fluorine content, especially considering evolving per- and polyfluorinated substances (PFAS) restrictions. Moreover, the poor adhesion of bare current collectors necessitates a wet coating-based primer layer with this binder. In this study, we introduce an alternative dry processing concept based on a thermoplastic fluorine-free binder with low environmental impact and high productivity. Paraffin, a short-chain family of saturated hydrocarbons known as an n-alkane, is the most stable chemical species owing to its C-H covalent bonds and the wide gap between highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energies. It also has a low melting temperature, allowing facile cohesion of the active materials to be interconnected by mild pressing activation. This novel dry electrode binder provides substantial electrochemical properties based on both NCM811 cathodes over 5 mAh cm−2 for 500 cycles. Furthermore, it implements true solvent-free adhesion without the wet-coating of primers on the current collector. This unique characteristic of paraffin can enable a powder-to-electrode manufacturing strategy with pattern coating, which alters the well-known PTFE-based freestanding electrode concept. This integrated approach bridges the gap between materials and processes, paving the way for sustainable advancements in battery electrode technology. © 2024, The Authors. All rights reserved.

关键词： Binders

A Comprehensively Introduction and Analysis of AVS3 Entropy Coding

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A Comprehensively Introduction and Analysis of AVS3 Entropy ...

data Compression Conference (dCC)

作者： Bin Guo Jianchao Wei Shanshe Wang Hui Ma Jiaqi Zhang Shenzhen International Graduate School Tsinghua University China Konka Grp Co Ltd China BEIJING BOYA RUISHI TECHNOLOGY CO. LTD China National Engineering Research Center of Visual Technology School of Computer Science Peking University China Information Technology R&D Innovation Center of Peking University China

ISBN: (数字)9798331534714

ISBN: (纸本)9798331534721

This paper elaborates the binary bin distribution of each syntax element in AVS3. The overall syntax elements in AVS3 can be divided into Context-Modeled(CM) Bin, Bypass(BPS) Bin, Weighted Context-Modeled(WCM) Bin. A comprehensive and quantitative analysis on these bitstreams are conducted and the result is shown in Fig. 1. Moreover, Fig. 2 illustrates the distribution of CM Bin, BPS Bin, and WCM Bin across various resolutions and QPs. The analysis reveals insightful correlations between the types of binary symbols and syntax elements within the AVS3 bitstream. Through this analysis, we aim to contribute to the implementation of AVS3 codecs.

关键词： Correlation Codecs Statistical analysis Symbols data compression Syntactics Entropy coding Binary sequences