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Chinese Journal of Chemical Engineering 2024年第3期67卷 257-267页

作者： Feifan Yang Yuanhang Jin Jiangying liu Haipeng Zhu Rong Xu Fenjuan Xiangli gongping liu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Shandong Production and Research Long Membrane Technology Development Co. Ltd.Yantai Economic Development ZoneYantai 265505China

For the application of carbon capture by membrane process,it is crucial to develop a highly permeable CO_(2)-selective membrane.In this work,we reported an ultra-thin polyether-block-amide(Pebax)mixedmatrix membranes(MMMs)incorporated by graphene oxide(GO),in which the interlayer channels were regulated to optimize the CO_(2)/N_(2) separation performance.Various membrane preparation conditions were systematically investigated on the influence of the membrane structure and separation performance,including the lateral size of GO nanosheets,GO loading,thermal reduction temperature,and time.The results demonstrated that the precisely regulated interlayer channel of GO nanosheets can rapidly provide CO_(2)-selective transport channels due to the synergetic effects of size sieving and preferential adsorption.The GO/Pebax ultra-thin MMMs exhibited CO_(2)/N_(2) selectivity of 72 and CO_(2) permeance of 400 GPU(1 GPU=106 cm^(3)(STP)·cm^(2)·s^(-1)·cmHg^(-1)),providing a promising candidate for CO_(2) capture.

关键词： Mixed-matrix membrane Ultra-thin membrane Pebax Graphene oxide CO_(2) capture

STAT3 ameliorates truncated tau-induced cognitive deficits

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Neural Regeneration Research 2024年第4期19卷 915-922页

作者： Bingge Zhang Huali Wan Maimaitijiang Maierwufu Qian liu Ting Li Ye He Xin Wang gongping liu Xiaoyue Hong Qiong Feng Department of Pathophysiology School of Basic Medicine and the Collaborative Innovation Center for Brain ScienceKey Laboratory of Ministry of Education of China and Hubei Province for Neurological DisordersTongji Medical CollegeHuazhong University of Science and Technology Department of Laboratory Medicine Guangdong ProvincialPeople's Hospital(Guangdong Academy of Medical Sciences)Southern Medical University Department of Laboratory Medicine Zhongnan Hospital of Wuhan University Department of Pathology Wuhan Children's HospitalTongji Medical CollegeHuazhong University of Science and Technology

Proteolytic cleavage of tau by asparagine endopeptidase(AEP)creates tau-N368 fragments,which may drive the pathophysiology associated with synaptic dysfunction and memory deterioration in the brain of Alzheimer’s disease patients.Nonetheless,the molecular mechanisms of truncated tau-induced cognitive deficits remain unclear.Evidence suggests that signal transduction and activator of transcription-3(STAT3)is associated with modulating synaptic plasticity,cell apoptosis,and cognitive function.Using luciferase reporter assays,electrophoretic mobility shift assays,western blotting,and immunofluorescence,we found that human tau-N368 accumulation inhibited STAT3 activity by suppressing STAT3 translocation into the nucleus.Overexpression of STAT3 improved tau-N368-induced synaptic deficits and reduced neuronal loss,thereby improving the cognitive deficits in tau-N368 mice.Moreover,in tau-N368 mice,activation of STAT3 increased N-methyl-D-aspartic acid receptor levels,decreased Bcl-2 levels,reversed synaptic damage and neuronal loss,and thereby alleviated cognitive deficits caused by tau-N368.Taken together,STAT3 plays a critical role in truncated tau-related neuropathological changes.This indicates a new mechanism behind the effect of tau-N368 on synapses and memory deficits.STAT3 can be used as a new molecular target to treat tau-N368-induced protein pathology.

关键词： Alzheimer’s disease apoptosis cognitive deficit memory neurodegenerative disease neuron loss N-methyl-D-aspartic acid receptor STAT3 synapse tau-N368

Mechanism of ethanol/water reverse separation through a functional graphene membrane:a molecular simulation investigation

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Frontiers of Chemical Science and Engineering 2023年第3期17卷 347-357页

作者： Quan liu Xian Wang Yanan Guo gongping liu Kai-Ge Zhou School of Chemical Engineering Analytical and Testing CenterAnhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Reverse-selective membranes have attracted considerable interest for bioethanol production.However,to date,the reverse-separation performance of ethanol/water is poor and the separation mechanism is unclear.Graphene-based membranes with tunable apertures and functional groups have shown substantial potential for use in molecular separation.Using molecular dynamics simulations,for the first time,we reveal twoway selectivity in ethanol/water separation through functional graphene membranes.Pristine graphene(PG)exhibits reverse-selective behavior with higher ethanol fluxes than water,resulting from the preferential adsorption for ethanol.Color flow mappings show that this ethanol-permselective process is initiated by the presence of ethanol-enriched and water-barren pores;this has not been reported in previous studies.In contrast,water molecules are preferred for hydroxylated graphene membranes because of the synergistic effects of molecular sieving and functional-group attraction.A simulation of the operando condition shows that the PG membrane with an aperture size of 3.8Åachieves good separation performance,with an ethanol/water separation factor of 34 and a flux value of 69.3 kg∙m‒2∙h‒1∙bar‒1.This study provides new insights into the reverse-selective mechanism of porous graphene membranes and a new avenue for efficient biofuel production.

关键词： reverse separation graphene membrane ethanol/water separation molecular simulation

Two-dimensional MXene hollow fiber membrane for divalent ions exclusion from water

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Chinese Journal of Chemical Engineering 2022年第1期35卷 260-266页

作者： Guozhen liu Yanan Guo Baochun Meng Zhenggang Wang gongping liu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Two-dimensional material membranes with fast transport channels and versatile chemical functionality are promising for molecular separation.Herein,for the first time,we reported design and engineering of two-dimensional Ti_(3)C_(2)Tx MXene(called transition metal carbides and nitrides)membranes supported on asymmetric polymeric hollow fiber substrate for water desalination.The membrane morphology,physicochemical properties and ions exclusion performance were systematically investigated.The results demonstrated that surface hydrophilicity and electrostatic repulsion and size sieving effect of interlayer channels synergistically endowed the MXene hollow fiber membrane with fast water permeation and efficient rejection of divalent ions during nanofiltration process.

关键词： Two-dimensional material MXene membranes Hollow fiber Desalination Nanofiltration

Theoretical study on Janus graphene oxide membrane for water transport

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 913-921页

作者： Quan liu Mingqiang Chen Yangyang Mao gongping liu Analytical and Testing Center Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Graphene oxide(GO)membranes have received considerable attention owing to their outstanding water-permeation properties;however,the effect of the membrane’s microstructures(such as the distribution of oxidized and pristine regions)on the transport mechanism remains unclear.In this study,we performed molecular simulations to explore the permeation of a water-ethanol mixture using a new type of Janus GO membranes with different orientations of oxidized and pristine surfaces.The results indicate that the oxidized upper surface endows the GO membrane with considerable water-capture capability and the in-built oxidized interlayer promotes the effective vertical diffusion of water molecules.Consequently,using the optimized Janus GO membrane,infinite water selectivity and outstanding water flux(-40.9 kg·m^(-2) h^(-1))were achieved.This study contributes to explaining the role of oxidized regions in water permeation via GO membranes and suggests that Janus GO membranes could be used as potential candidates for water-ethanol separation.

关键词： graphene oxide membrane molecular dynamics simulation water permeation water-ethanol separation oxidized and pristine regions

Natural gas purification by asymmetric membranes: An overview

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Green Energy & Environment 2021年第2期6卷 176-192页

作者： Xi Chen gongping liu Wanqin Jin State Key Laboratory of Maerials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech University30 Puzhu Road(S)Nanjing211816China

Natural gas, as a very important source of energy and chemical feedstock, can be used in place of coal to lower net carbon dioxide emissions.Membrane separation technology is an attractive alternative for natural gas purification where the impurities represented by acid gases(CO_(2) and H_(2)S) as well as inert gases(N_(2)) must be removed to meet the transportation and usage specifications. From the economic benefits viewpoint,asymmetric membranes are required for industrial manufacture and applications. This paper aims to review the latest development of various kinds of asymmetric membranes for natural gas purification, mainly focusing on CO_(2) removal from CH_(4), including H_(2)S and N_(2) separation from CH_(4) as well. According to material types, polymeric, inorganic, mixed-matrix and carbon molecular sieve membranes are introduced. The associated fabrication approaches and transport properties are discussed for each kinds of asymmetric membranes. Towards the practical implementation, an emphasis is placed on hollow fiber asymmetric structure for these polymeric, mixed-matrix and carbon molecular sieve membranes.

关键词： Natural gas Asymmetric membrane Gas separation CO_(2)separation

Graphene-based membranes for pervaporation processes

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Chinese Journal of Chemical Engineering 2020年第7期28卷 1755-1766页

作者： Kecheng Guan gongping liu Hideto Matsuyama Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China Research Center for Membrane and Film Technology Department of Chemical Science and EngineeringKobe University1-1 RokkodaiNadaKobe 657-8501Japan

Two-dimensional graphene and its derivatives exhibiting distinct physiochemical properties are intriguing building blocks for researchers from a large variety of scientific fields.Assembling graphene-based materials into membrane layers brings great potentials for high-efficiency membrane processes.Particularly,pervaporation by graphene-based membranes has been intensively studied with respect to the membrane design and preparation.This review aims to provide an overview on the graphene-based membranes for pervaporation processes ranged from fabrication to application.Physical or chemical decoration of graphene-based materials is elaborated regarding their effects on the microstructure and performance.The mass transport of pervaporation through graphene-based membranes is introduced,and relevant mechanisms are described.Furthermore,performances of state-of-the-art graphene-based membranes for different pervaporation applications are summarized.Finally,the perspectives of current challenges and future directions are presented.

关键词： Graphene Membranes Separation Pervaporation

Graphene oxide membranes supported on the ceramic hollow fibre for efficient H2 recovery

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Chinese Journal of Chemical Engineering 2017年第6期25卷 752-759页

作者： Kang Huang Jianwei Yuan Guoshun Shen gongping liu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Jiangsu National Synergetic Innovation Cen terfor Advanced Materials Nanjing Tech UniversityNanjing 210009 China

The special channels and intrinsic defects within GO laminates make it a very potential candidate for gas separation in recent years. Herein, the gas separation performance of GO membranes prepared on the surface of ceramicα-Al_2O_3 hollow fibre was investigated systematically. The microstructures of ceramic hollow fibre supported GO membranes were optimized by adjusting operation conditions. And, the GO membrane fabricated at 30 min exhibited great promising H_2 recovery ability from H_2/CO_2 mixture. At room temperature, the H_2 permeance was over 1.00 × 10^(-7)mol·m^(-2)·s^(-1)·Pa^(-1)for both single gas and binary mixture. The corresponding ideal selectivity and mixture separation factor reached around 15 and 10, respectively. In addition, humility, operation temperature, H_2 concentration in the feed and the reproducibility were also studied in this work.

关键词： Graphene oxide Ceramic hollow fibre Gas separation Hydrogen recovery

Polydimethylsiloxane (PDMS) Composite Membrane Fabricated on the Inner Surface of a Ceramic Hollow Fiber: From Single-Channel to Multi-Channel

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Engineering 2020年第1期6卷 89-99页

作者： Ziye Dong Haipeng Zhu Yingting Hang gongping liu Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

The fabrication of a separation layer on the inner surface of a hollow fiber (HF) substrate to form an HF composite membrane offers exciting opportunities for industrial applications, although challenges remain. This work reports on the fabrication of a polydimethylsiloxane (PDMS) composite membrane on the inner surface of a single-channel or multi-channel ceramic HF via a proposed coating/crossflow approach. The nanostructures and transport properties of the PDMS HF composite membranes were optimized by controlling the polymer concentration and coating time. The morphology, surface chemistry, interfacial adhesion, and separation performance of the membranes were characterized by fieldemission scanning electron microscope (FE-SEM), attenuated total reflection Fourier-transform infrared (ATR-FTIR) spectroscopy, the nano-indentation/scratch technique, and pervaporation (PV) recovery of bio-butanol, respectively. The formation mechanism for the deposition of the PDMS layer onto the inner surface of the ceramic HF was studied in detail. The optimized inner surface of the PDMS/ceramic HF composite membranes with a thin and defect-free separation layer exhibited a high flux of ~1800 gm-2h-1 and an excellent separation factor of 35–38 for 1 wt% n-butanol/water mixtures at 60 C. The facile coating/cross-flow methodology proposed here shows great potential for fabricating inner-surface polymer-coated HFs that have broad applications including membranes, adsorbents, composite materials, and more.

关键词： Ceramic hollow fiber Inner membrane Pervaporation Polydimethylsiloxane Butanol

Novel membrane separation technologies and membrane processes

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Frontiers of Chemical Science and Engineering 2021年第4期15卷 717-719页

作者： Yanying Wei gongping liu Jianquan Luo Libo Li Zhi Xu School of Chemistry&Chemical Engineering South China University of TechnologyGuangzhou 510640China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringUniversity of Chinese Academy of SciencesChinese Academy of SciencesBeijing 100190China State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China

Membrane-based separation technologies have received increasing attention attributing to lots of advantages such as the low energy consumption,easy operation,and environmental friendliness.In recent years,the emergence of novel two-dimensional(2D)materials,such as graphene,provides a new opportunity for membrane development.Thus,Frontiers of Chemical Science and Engineering(FCSE),one of the transactions of Chinese Academy of Engineering,organized this Special Issue aiming to illustrate some of the exciting progresses and achievements in the relevant research fields.

关键词： development. separation friend