Journal of Membrane Science最新文献

{"title":"Catechol-Ag interlayer constructed nanofiltration membrane for efficient purification of glucose from sugars","authors":"Xiaohui Ju ,&nbsp;Hong Gao ,&nbsp;Chen Wang ,&nbsp;Runtian Li ,&nbsp;Wenqi Zhang ,&nbsp;Hongjun Ji ,&nbsp;Xiao Xiao ,&nbsp;Weixing Li ,&nbsp;Yujia Tong","doi":"10.1016/j.memsci.2024.123497","DOIUrl":"10.1016/j.memsci.2024.123497","url":null,"abstract":"<div><div>A novel nanofiltration (NF) membrane is developed for efficiently separating monosaccharide from disaccharide. A hydrophilic catechol (CT)-Ag interlayer is proposed and co-deposited on a polyacrylonitrile (PAN) substrate, and then interfacial polymerization (IP) of polyethyleneimine (PEI) and trimethyl chloride (TMC) is carried out. The silver nanoparticles obtained through the reduction reaction are used to precisely regulate the unique selective structure with quinone aggregates and polyamides. The composite NF membrane achieved a pure water flux of 31.2 L m⁻² h⁻¹ at 0.5 MPa with 81.2 % sucrose rejection and 17.5 % glucose rejection. Performance evaluation in dyes, proteins, and bacteria systems also showcased the great performance of the membrane. Following the filtration of methyl orange and BSA, the flux recovery rates of the PAN/CT-Ag interlayer/PEI + TMC membrane reached 98.7 % and 98.1 %, respectively. The designed structure of silver nanoparticles in membrane enhances the anti-fouling properties through interactions with bacterial proteins. The developed membrane shows promising potential for glucose purification.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"716 ","pages":"Article 123497"},"PeriodicalIF":8.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Methanol tolerable ultrathin proton exchange membrane fabricated via in-situ ionic self-crosslinking strategy for high-performance DMFCs","authors":"Yixin Luo ,&nbsp;Jie Wang ,&nbsp;Fuqiang Hu ,&nbsp;Ting Qu ,&nbsp;Hai Liu ,&nbsp;Zushun Xu ,&nbsp;Chunli Gong ,&nbsp;Guoliang Liu ,&nbsp;Ying Ou","doi":"10.1016/j.memsci.2024.123510","DOIUrl":"10.1016/j.memsci.2024.123510","url":null,"abstract":"<div><div>Proton exchange membranes (PEMs) with high proton conductivity, mechanical stability, and methanol barrier capability is urgently needed for direct methanol fuel cell (DMFCs). In response, a series of highly sulfonated polybenzimidazoles (SPBI) were synthesized, followed by the creation of a unique <em>in-situ</em> ionic self-crosslinking mechanism via acid-base pair interactions between –SO₃^- and protonated N within the imidazolium rings of SPBI in an acidic milieu. The <em>in-situ</em> ionic self-crosslinking not only significantly enhances the mechanical stability of the prepared membrane, but also constructs a microstructure with a free volume radius smaller than the molecular dimensions of methanol, subsequently imparting unparalleled resistance to methanol permeation. After being reduced to an ultrathin thickness of 15 μm, the optimal SPBI-SO₃H-200 % membrane obtains remarkable high specific proton conductivity of 33.48 S cm⁻². Furthermore, the assembled DMFC demonstrates an exceptionally low methanol crossover current density of 188.25 mA/cm² alongside high power density of 109.92 mW cm⁻² within 2 M methanol fuel, significantly outperforming the methanol crossover current density of 386.06 mA/cm² and power density of 87.13 mW cm⁻² achieved by a single cell assembled with Nafion 115 membrane.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123510"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental validation of the presence of flow maldistribution in electrodialysis stacks and its effect on the limiting current density","authors":"Jack Ledingham ,&nbsp;Jonathan R. Howse ,&nbsp;Alasdair N. Campbell ,&nbsp;Ben in ‘t Veen ,&nbsp;Lucas Keyzer ,&nbsp;Kyra L. Sedransk Campbell","doi":"10.1016/j.memsci.2024.123494","DOIUrl":"10.1016/j.memsci.2024.123494","url":null,"abstract":"<div><div>Flow maldistribution between channels in electrodialysis has previously been simulated and is predicted to have a substantial impact on the limiting current density (LCD) and thus constitutes a barrier to industrial implementation. Using computational fluid dynamics (CFD) simulations and a 1-D circuit-based model, it was previously concluded that maldistribution is both prevalent in electrodialysis and adversely affects operation through a reduction of the LCD. In this work, the presence and impact of maldistribution are confirmed experimentally using red-blue particle image velocimetry (PIV) and through measuring the LCD as a function of the degree of maldistribution, respectively. In the PIV experiments, 50 μm particles were suspended and were flowed through a glass flow cell with the same geometry as those used in the CFD simulations. These spheres were imaged using a single exposure photograph and two pulsed LED bursts and their velocities subsequently calculated. The imaging of many particles demonstrated significant maldistribution in line with what had been previously predicted. The effect of maldistribution on operation was experimentally validated by measuring the LCD of an electrodialysis stack as a function of the degree of maldistribution. The degree of maldistribution was independently controlled by varying the flow rate and the number of cell pairs while accounting for confounding effects. The measured LCD was found to decrease with an increasing degree of maldistribution. A further CFD study was performed, comparing the degree of maldistribution in U and Z configuration stacks. It was demonstrated that while at low flow rates, maldistribution is worse for U-type geometries, at high flow rates, it is worse for Z-type geometries. Overall, the results presented in this work conclusively demonstrate that maldistribution exists within electrodialysis and significantly affects the LCD. This consequently validates previous modelling results and highlights maldistribution as an important phenomenon in electrodialysis that should be considered when optimisation is performed.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"716 ","pages":"Article 123494"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stringing covalent organic framework particles for preparing highly loaded mixed-matrix membranes for efficient and precise dye separation","authors":"Cai Zhang,&nbsp;Yinyu Li,&nbsp;Rongxin Huang,&nbsp;Xiaogeng Lin,&nbsp;Yang Huang,&nbsp;Yasan He","doi":"10.1016/j.memsci.2024.123509","DOIUrl":"10.1016/j.memsci.2024.123509","url":null,"abstract":"<div><div>Covalent organic frameworks (COFs) based mixed-matrix membranes (MMMs) combining the merits of processable polymers and ordered porosity are potential for molecular separation. However, it remains a challenge to control the interfacial compatibility to prepare high COFs loaded MMMs. Herein, we developed a facile strategy of “Stringing COF particles” for improving the interfacial compatibility to prepare high COFs loaded MMMs with high separation performance. The MMMs could be prepared by simply mixing COF powders with chitosan (CS) solutions, without needing the complicated nanosheetization or modification of COFs. Three typical COFs were synthesized and tested. The suitable large pore size and good hydrophilicity of COFs were confirmed crucial to the “Stringing” strategy. Characterizations indicated CS could enter the larger pores of the COFs (named COF-TADH) and firmly string COF particles together via strong H-bonding to obtain a tightly assembled COF-TADH@CS layer with COFs loading up to 67 wt%. The fabricated 67%COF-TADH@CS/nylon membrane exhibited excellent permeance and stable 100 % rejection to Coomassie brilliant blue (BB), highly competitive compared with other reported membranes. The high COFs loaded MMMs maintain the sieving merits of ordered COF pores, achieving precise separation of the mixed BB/Methyl orange (MO) solution with only MO penetrating through.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123509"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controlled phase separation of regenerated cellulose with super-engineering thermoplastics into porous membranes with hierarchical morphology as high-performance separators for lithium-ion batteries","authors":"Guo Lin ,&nbsp;Lifen Tong ,&nbsp;Chunxia Zhao ,&nbsp;Yuanpeng Wu ,&nbsp;Kun Jia","doi":"10.1016/j.memsci.2024.123505","DOIUrl":"10.1016/j.memsci.2024.123505","url":null,"abstract":"<div><div>In this work, a highly porous cellulose/polyarylene ether nitrile (CE/PEN) membrane, bearing hierarchical beads-on-string structures, has been fabricated using regenerated cellulose derived from low-cost waste cigarette butts and PEN via the classical phase conversion method. More specifically, the sequential nucleation of CE and PEN macromolecules from dope solution results in adjustable surface segregation behavior during non-solvent induced phase separation (NIPs), leading to the formation of in-situ assembled rough beads-on-string on the external surfaces and inner pore walls of the membranes. The formation mechanism of a porous membrane with selective component distribution is investigated through thermodynamic and molecular dynamics simulations of phase separation. The resulting composite separator not only exhibits optimal physical properties, including improved mechanical strength, prominent liquid electrolyte wettability (electrolyte contact angle of 0°) and high-thermal resistance, but also demonstrates high ionic conductivity and lower interface resistance. Consequently, the CE/PEN separator enables stable lithium metal anode interface and effectively suppresses the growth of lithium dendrites. More significantly, the resulted lithium metal battery displays remarkable enhancement in capacity, cycling stability (98.6 % for 200 cycles), and rate property (101mAh/g at 10C rate).</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"716 ","pages":"Article 123505"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Building ternary mixed matrix membranes with ionic liquid-functional COF fillers for efficient CO2 separation","authors":"Shuai Gu ,&nbsp;Lijuan Feng ,&nbsp;Guoliu Dai,&nbsp;Feng Zhang,&nbsp;Lifeng Deng,&nbsp;Bo Peng,&nbsp;Haohao Zeng,&nbsp;Chenxiang Ai,&nbsp;Juntao Tang,&nbsp;Guipeng Yu","doi":"10.1016/j.memsci.2024.123506","DOIUrl":"10.1016/j.memsci.2024.123506","url":null,"abstract":"<div><div>Developing novel mixed matrix membranes (MMMs) with high CO₂ permeability and selectivity, while overcoming the limitations of traditional MMMs, presents a significant challenge. Herein, we reported a simple and straightforward method to develop ternary mixed matrix membranes (TMMMs) featuring excellent matrix-filler compatibility for CO₂ separation through the modification of the covalent organic framework (COF) using ionic liquid (IL) additives. A novel IL ([Bmim][Tf₂N]) encapsulated COF filler (IL@TpTta-COF) was facilely prepared, and incorporated into the PIM-1 matrix to develop a series of TMMMs.The incorporation of ILs with high affinity towards CO₂ within the TpTta-COF improves the molecular sieving effect of the functional filler, and helps to enhance polymer-filler interfacial compatibility, and mitigates particle agglomeration during the preparation of TMMMs. Notably, the resultant TMMMs demonstrate remarkable stability, and achieve an impressive CO₂ permeability of 10,035 Barrer and an excellent selectivity of 30.2 for CO₂/N₂ mixtures, exceeding the Robeson upper bound in 2019. This research underscores the potential of integrating functional additives to produce novel COF-based MMMs with enhanced CO₂ separation efficiency for industrial applications.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"716 ","pages":"Article 123506"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142720996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High rejection seawater reverse osmosis TFC membranes with a polyamide-polysulfonamide interpenetrated functional layer","authors":"Qihang Li ,&nbsp;Liyi An ,&nbsp;Chuning Shang ,&nbsp;Jianqiang Meng","doi":"10.1016/j.memsci.2024.123507","DOIUrl":"10.1016/j.memsci.2024.123507","url":null,"abstract":"<div><div>Current polyamide thin-film composite (TFC) membranes for seawater reverse osmosis (SWRO) require enhanced rejection capabilities for high salinity application and the removal of neutral micropollutants. In this study, we developed high rejection SWRO membranes utilizing <em>m</em>-phenylenediamine (MPD) as the water phase monomer, trimethyl chloride (TMC) as the organic phase monomer, and naphthalene-1,3,6-trisulfonyl chloride (NTSC) as a molecular plug. Xylene was added to the heated organic phase to compensate for the flux loss due to the tightened functional layer. The membranes were characterized in detail with ATR-FTIR, XPS, SEM, AFM, WCA, surface zeta potential, Positron annihilation spectroscopy (PALS), and quartz crystal microbalance (QCM). Our results indicate that adding xylene into the organic phase enhances flux, while heating the organic phase to 90^oC benefits both flux and rejection. Furthermore, the addition of NTSC further improves the rejection. The variation in membrane flux correlates with the functional layer morphology under SEM and the membrane rejection properties correspond well with the functional layer free volume results by PALS. Due to the low reactivity of sulfonyl chloride, NTSC can only form oligomers embedding into the polyamide network, resulting in significantly higher rejection of sodium chloride (99.90 %) and boron (92.39 %) with a flux of 37.85 L m⁻² h⁻¹ under the conditions of 35000 ppm NaCl and 5 ppm boric acid at 800 psi. This work demonstrates that high rejection SWRO membranes can be successfully achieved by an in situ “swelling and filling” method.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123507"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lattice-defective metal-organic framework membranes from filling mesoporous colloidal networks for monovalent ion separation","authors":"Yihao Xiao,&nbsp;Yanqing Yu,&nbsp;Xinxi Huang,&nbsp;Kun Niu,&nbsp;Wanbin Li","doi":"10.1016/j.memsci.2024.123508","DOIUrl":"10.1016/j.memsci.2024.123508","url":null,"abstract":"<div><div>Ionic separations are critical to various chemical, environmental, and energy-related industries, but precise discrimination of monovalent ions with similar properties is extremely difficult. Nanoporous metal-organic framework (MOF) membranes attract intensive attention for ionic separations. However, precise adjusting transport nanochannels of frameworks and simplifying formation mechanisms of membranes remain extremely challenging. In this study, we report controllable construction of lattice-defective MOF membranes for sharp ion sieving, through filling mesoporous MOF colloidal layers by confined interior growth. By utilizing highly processable mesoporous colloidal networks to provide abundant nucleation sites, decelerate precursor diffusions, and serve as membrane-forming hosts, interior MOF growth can be confined in the mesopores of hosts, thereby eliminating any avoid spaces and constructing pinhole-free membranes in a scalable route. Moreover, through creating linker-missing lattice defects in frameworks, the microporous pathways can be accurately expanded at angstrom level, consequently, selectively improving the accessibilities for specific monovalent cations but maintaining the large resistances for others. Importantly, the prepared 150-nm MOF membranes exhibit good long-term stability and superb ion-sieving performance, especially for monovalent cations, with mixture selectivities as high as 7.5 for K⁺/Li⁺ and 51 for K⁺/Mg²⁺ during concentration-driven separations, which outperform most membranes. This study provides an alternative methodology to construct high-performance ion-sieving polycrystalline membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123508"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrathin cyclodextrin-based nanofiltration membrane with tunable microporosity for antibiotic desalination","authors":"Linlong Zhou ,&nbsp;Shuyun Gu ,&nbsp;Fang Xu ,&nbsp;Jin Zhang ,&nbsp;Zheyi Hu ,&nbsp;Siyao Li ,&nbsp;Zhi Xu","doi":"10.1016/j.memsci.2024.123504","DOIUrl":"10.1016/j.memsci.2024.123504","url":null,"abstract":"<div><div>Nanofiltration (NF) membranes play a crucial role in ion separation and antibiotic purification due to their energy efficiency and environment-friendliness. However, conventional polymeric membranes are susceptible to the “trade-off” between permeability and selectivity due to the lack of intrinsically rigid micropores. Herein, the amino-cyclodextrins (amino-CDs) with different cavity sizes were synthesized and employed as the building block to construct 15-nm-thick nanofilms. The rational incorporation of macrocycles with well-defined and tunable cavity into nanofilm enabled a significant enhancement of water permeance and a precise manipulation of molecular weight cut-off of the membranes. Thanks to the significant difference of inherent energy barrier for passage of ions through CD cavity, the CD-incorporated membranes achieved a high Cl⁻/SO₄²⁻ selectivity of 87. In addition, the CD-regulated membranes showed an excellent antibiotic desalination performance, out-performing the state-of-the-art membranes for antibiotic purification. This work provides a gateway to the development of nanofiltration membranes with precise molecular sieving for antibiotic desalination.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123504"},"PeriodicalIF":8.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-metallic cation and anion co-doped perovskite oxide ceramic membranes for high-efficiency oxygen permeation at low temperatures","authors":"Song Lei ,&nbsp;Sisi Wen ,&nbsp;Jian Xue ,&nbsp;Ao Wang ,&nbsp;Jiaqi Li ,&nbsp;Zhongyuan Liu ,&nbsp;Longgui Zhang ,&nbsp;Yifeng Li ,&nbsp;Haihui Wang","doi":"10.1016/j.memsci.2024.123500","DOIUrl":"10.1016/j.memsci.2024.123500","url":null,"abstract":"<div><div>Insufficient structural stability and limited lattice oxygen mobility at low temperatures seriously limit the application of perovskite-type oxides in mixed ionic-electronic conducting oxygen-permeable membranes. Engineering the crystal structure and oxygen vacancies by ion doping is an effective strategy to enhance both structural stability and lattice oxygen mobility. Different from conventional metal ion doping, we report that the co-doping of the classical SrCoO_{3-<em>δ</em>} by the non-metallic cation P⁵⁺ and the anion Cl⁻ stabilizes the cubic perovskite structure and allows low temperature oxygen permeation due to improved lattice oxygen mobility. In detail, P doped at the Co site transforms the crystal structure from the hexagonal phase to the cubic phase, and Cl doped at the oxygen site weakens the metal-oxygen bond, which significantly enhances the lattice oxygen mobility. Optimal doping concentrations were found to be SrCo₀_.₉₅P₀_.₀₅O_{3-<em>δ</em>}Cl_0.05 (SCP5Cl5). Furthermore, by constructing an asymmetric membrane with a sandwich structure, the oxygen permeation flux of the SCP5Cl5 ceramic membrane was up to 1.10 mL min⁻¹ cm⁻² at 873 K, which provides an effective strategy for developing oxygen-permeable membranes with high permeation flux at low temperatures.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123500"},"PeriodicalIF":8.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}