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Chinese Chemical Letters 2022年第2期33卷 1001-1005页

作者： Meng Zhang Jin Dai Shengmei Huang Dan Fang Yitao Liu Jianyong Yu Bin Ding andreas greiner Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 201620China Macromolecular Chemistry and Bavarian Polymer Institute University of BayreuthBayreuth 95440Germany

Electrocatalysis plays an increasingly important role in converting atmospheric molecules(e.g.,N_(2),CO_(2) and H_(2)O)to value-added products(e.g.,NH_(3),C_(2)H_(4)and H_(2)).However,developing a simple strategy for preparing catalysts with high performance for the effective conversion of clean energy is still full of ***,we describe a straightforward,one-step reduction method to achieve the formation of Pt nanoparticles(NPs)and the vacancy engineering of TiO_(2-x)nanofibers(NFs)simultaneously,which can be accomplished in 5 ***,a Pt/TiO_(2-x)nanofibrous aerogel(NA)with an ordered cellular archi-tecture is prepared through a directional freezing *** Pt/TiO_(2-x)NA with excellent mechanical properties can be made into a self-supporting electrode for electrocatalytic N_(2)reduction reaction(NRR),showing high NH_(3) yield rate(4.81×10^(-10)mol/s cm^(-2))and Faraday efficiency(14.9%)at-0.35 V ***.

关键词： Vacancy engineering Pt nanoparticles TiO_(2–x)nanofibers Nanofibrous aerogel Electrocatalysis Nitrogen reduction

Electrospinning of ABS nanofibers and their high filtration performance

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Advanced Fiber Materials 2020年第1期2卷 34-43页

作者： Shaohua Jiang Holger Schmalz Seema Agarwal andreas greiner Macromolecular Chemistry Bavarian Polymer InstituteUniversity of BayreuthUniversitätsstraße 3095440 BayreuthGermany Bavarian Polymer Institute(BPI) University of BayreuthUniversitätsstraße 3095440 BayreuthGermany Present Address:College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China

Acrylonitrile-butadiene-styrene(ABS)is a commercial polymer for widely industrial applications due to its good mechanical and physical ***,there are only countable reports regarding its fibers from *** investigation on its optimized electrospinning parameters is ***,ABS fibers with different fiber diameters were produced by *** electrospinning conditions,including the solvents,solution concentrations and amounts of different salt additives,have been comprehensively *** morphologies of electrospun ABS fibers are studied by scanning electron microscopy and Raman *** fiber diameters and coating densities are applied for filtration applications,which showed excellent filtration *** filtration efficiency of up to 99%,low pressure drop of<30 Pa,and high filtration quality factor of up to 0.477 are achieved from the electrospun ABS fibers coated on microfibrous polypropylene *** addition,the electrospun ABS fibers also shows good thermal stability and other applications such as oil/water separation.

关键词： Acrylonitrile-butadiene-styrene fiber Electrospinning Filtration Oil-water separation

Molecular Dynamics Simulations of Nanoparticle Interactions with a Planar Wall:Does Shape Matter?

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Communications in Computational Physics 2013年第3期13卷 900-915页

作者： andreas Fuchs David Kauzlaric andreas greiner Sauro Succi Jan.G.Korvink Laboratory for Simulation Department of Microsystems Engineering(IMTEK)University of FreiburgGeorges-Kohler-Allee 10379110 FreiburgGermany School of Soft Matter Research Freiburg Institute for Advanced StudiesUniversity of FreiburgAlbertstr.1979104 FreiburgGermany Istituto Applicazioni Calcolo CNRvia dei Taurini 900185RomaItaly

We investigate the hydrodynamic interactions of spherical colloidal nano particles and nano tetrahedra near a planar wall by means of molecular dynamics(MD)simulations of rigid particles within an all-atom *** both spherical and nano-tetrahedral particles,we find that the parallel and perpendicular components of the local diffusion coefficient and viscosity,show good agreement with hydrodynamic theory of Fax´en and *** provides further evidence that low perturbations from sphericality of a nanoparticle’s shape has little influence on its local diffusive behaviour,and that for this particular case,the continuum theory fluid dynamics is valid even down to molecular scales.

关键词： Molecular dynamics simulation nanoparticle hydrodynamic interaction

Virtually Wall-Less Tubular Sponges as Compartmentalized Reaction Containers

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Research 2019年第1期2019卷 868-877页

作者： Shaohua Jiang Viktoria Gruen Sabine Rosenfeldt Anna S.Schenk Seema Agarwal Zhi-Kang Xu andreas greiner College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China Universitat Bayreuth Physical ChemistryUniversitatsstrasse 3095447 BayreuthGermany Universitat Bayreuth Macromolecular ChemistryBavarian Polymer InstituteUniversitatsstrasse 3095440 BayreuthGermany MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang University310027 HangzhouChina

Sponges are open cellular materials with numerous interesting ***,the potential of compartmentalized sponges has not been explored although many new properties and applications could be *** found that compartmentalized fbrous ultraporous polymer sponges with superhydrophobic surfaces could be designed as virtually wall-less reaction *** this,for example,the efcient removal of CO_(2) from water and the controlled mineralization of calcium carbonate are *** high porosity(>99%)and superhydrophobicity make these sponges ideal candidates to hold alkanolamine solution for absorbing CO_(2) and exchange gas through the walls of the *** tubular sponge exhibits a much higher evaporation rate than a glass tube with the same diameter due to the much larger contact area between water and ***,the spongy reaction container also possesses a much faster adsorption rate,smaller equilibration time and higher efciency for CO_(2) adsorption than the glass tube *** addition,these tubular sponges are also utilized to precipitate calcium carbonate by ammonium carbonate decomposition,which can control the deposition rates and products by tailoring the porosity and surface chemistry in the *** new sponges provide an ideal basis for numerous new applications,for example,as breathable pipe lines for gas-liquid exchange,slag slurry carbonization,humidifer,and blood enricher.

关键词： sponge porosity adsorption

Polymer nanofibre composite nonwovens with metal-like electrical conductivity

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npj Flexible Electronics 2018年第1期2卷 29-34页

作者： Steffen Reich Matthias Burgard Markus Langner Shaohua Jiang Xueqin Wang Seema Agarwal Bin Ding Jianyong Yu andreas greiner Macromolecular Chemistry Bavarian Polymer InstituteUniversity of BayreuthBayreuth 95440Germany College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China Key Laboratory of Textile Science&Technology Ministry of EducationCollege of TextileDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 20051China

Bendable and breathable polymer nanofibre nonwovens with metal-like electrical conductivity are required for lightweight electrodes and electric shielding design with applications in batteries,functional textiles,sensors,cars,aerospace,constructions,mobile phones,and medical ***-like conductivity in polymer nonwovens has not been achieved till now due to the limitation of the existing processing *** show here,the metal-like electrical conductivity of 750,000 S/m in polyacrylonitrile(PAN),poly(ε-caprolactone)(PCL)nonwoven using very low content of silver nanowires(AgNW;3.35 vol%).The key to the high conductivity was the homogenous distribution of AgNW in nonwoven made by wet-laid process using short electrospun fibre and AgNW *** a threshold of 0.36 vol%AgNW,the conductivity of the nonwoven increased by seven orders of magnitude,which we attribute to the onset of percolation of the *** nonwoven-AgNW composites show fast heating and cooling within a few seconds at a voltage of 1.1 V,which is in the range of portable *** composites are also breathable and *** electrical conductivity was independent of the bending angle of the composite,which is important for applications mentioned above and would help other scientists to design new conductive materials in the future.

关键词： composite composites conductivity

Transient elastography improves detection of liver cirrhosis compared to routine screening tests

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World Journal of Gastroenterology 2015年第3期21卷 953-960页

作者： Thomas Gobel Janine Schadewaldt-Tümmers Lucas greiner Christopher Poremba Dieter Haussinger andreas Erhardt Klinik für Gastroenterologie Hepatologie und InfektiologieUniversitatsklinikum Düsseldorf40225 DüsseldorfGermany Klinik für Gastroenterologie Hepatologie und DiabetologiePetrus-Krankenhaus Wuppertal42283 WuppertalGermany Pathologie München-Nord Ernst-Platz-StraBe 280992 MünchenGermany

AIM:To investigate the diagnostic significance oftransient elastography(TE) in a daily routine clinical setting in comparison to clinical signs,laboratory parameters and ***:TE,ultrasound,laboratory parameters and cutaneous liver signs were assessed in 291 consecutive patients with chronic liver disease of various aetiologies who underwent liver biopsy in daily ***:Sensitivity of TE for the detection of liver cirrhosis was 90.4%,compared to 80.1% for ultrasound,58.0% for platelet count and 45.1% for cutaneous liver signs(P < 0.0001 for comparisons with histology).AUROC for TE was 0.760(95%CI:0.694-0.825).Combination of TE with ultrasound increased sensitivity to 96.1% and AUROC to 0.825(95%CI:0.768-0.882).TE correlated with laboratory parameters of cirrhosis progression like albumin(r =-0.43),prothrombin time(r =-0.44),and bilirubin(r = 0.34; P < 0.001 for each).Particularly,in patients with Child Pugh score A or normal platelet count TE improved sensitivity for the detection of liver cirrhosis compared to ultrasound by 14.1%(P < 0.04) and 16.3%(P < 0.02),***:Transient elastography is superior to routine diagnostic tests allowing detection of liver cirrhosis in additional 10%-16% of patients with chronic liver disease that would have been missed by clinical examinations.

关键词： Transient elastography Fibroscan Liver cirrhosis Liver disease Chronic hepatitis