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Manipulating the Macroscopic and Microscopic Morphology of Large-Area Gravure-Printed ZnO Films for High-Performance Flexible Organic Solar Cells

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Energy & Environmental Materials 2024年第2期7卷 233-243页

作者： Zhenguo Wang Jingbo Guo Yaqin Pan Jin Fang Chao Gong Lixin Mo Qun Luo Jian Lin Changqi Ma School of Nano-Tech and Nano-Bionics University of Science and Technology of China i-Lab & Printable Electronics Research Center Suzhou Institute of NanoTech and Nano-Bionics Chinese Academy of Sciences (CAS) Beijing Engineering Research Center of Printed Electronics Beijing Institute of Graphic Communication Jiangxi Institute of Nanotechnology Chinese Academy of Sciences (CAS)

Gravure printing is a promising large-scale fabrication method for flexible organic solar cells（FOSCs） because it is compatible with two-dimension patternable roll-to-roll fabrication. However, the unsuitable rheological property of Zn O nanoinks resulted in unevenness and looseness of the gravure-printed Zn O interfacial layer. Here we propose a strategy to manipulate the macroscopic and microscopic of the gravure-printed Zn O films through using mixed solvent and poly（vinylpyrrolidone）(PVP) *** regulation of drying speed effectively manipulates the droplets fusion and leveling process and eliminates the printing ribbing structure in the macroscopic morphology. The additive of PVP effectively regulates the rheological property and improves the microscopic compactness of the *** this method, large-area Zn O:PVP films（28 × 9 cm2） with excellent uniformity, compactness, conductivity, and bending durability were fabricated. The power conversion efficiencies of FOSCs with gravure-printed Ag NWs and Zn O:PVP films reached 14.34% and 17.07% for the 1 cm2PM6:Y6 and PM6:L8-BO flexible devices. The efficiency of 17.07% is the highest value to date for the 1 cm2FOSCs. The use of mixed solvent and PVP addition also significantly enlarged the printing window of Zn O ink, ensuring high-quality printed thin films with thicknesses varying from 30 to 100 nm.

关键词： flexible organic solar cell gravure printing large-area flexible interfacial layer rheology properties zinc oxide

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Unraveling the rheology of Nanocellulose Aqueous Suspensions:A Comprehensive Study on Biomass-Derived Nanofibrillated Cellulose

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Journal of Renewable Materials 2024年第3期12卷 443-455页

作者： Mingyue Miao Fei Wang Qing Li Longchen Tao Chenchen Dai Yu Liu Shujuan Han Wenshuai Chen Ping Lu Key Laboratory of Bio-Based Material Science and Technology Ministry of EducationNortheast Forestry UniversityHarbin150040China Department of Chemistry and Biochemistry Rowan UniversityGlassboroNew Jersey08028USA

The rheological properties of nanocellulose aqueous suspensions play a critical role in the development of nanocellulose-based bulk ***-crystalline,high-aspect ratio,and slender nanofibrillated cellulose(NFC)were extracted from four biomass *** cellulose nanofibrils and nanofibril bundles formed inter-connected networks in the NFC aqueous *** storage moduli of the suspensions with different concentrations were higher than their corresponding loss *** the concentration increased,the storage and loss modulus of NFC dispersion *** the shear rate increased to a certain value,there were differences in the changing trend of the rheological behavior of NFC aqueous suspensions derived from different biomass resources and the suspensions with different solid *** dispersion’s storage and loss modulus increased when the temperature rose to nearly 80℃.We hope this study can deepen the understanding of the rheological properties of NFC colloids derived from different biomass resources.

关键词： Biomass resources nanofibrillated cellulose high-pressure homogenizer suspension rheology properties

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rheology and microstructure effects of waste spent coffee grounds in modifying asphalt binder

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Low-carbon Materials and Green Construction 2023年第1期1卷 21-33页

作者： Mingjun Xie Linglin Xu Kai Wu Yutong Wen Hongmi Jiang Zhengwu Jiang Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education School of Materials Science and EngineeringTongji UniversityShanghai 201804China Shanghai Pinghe Bilingua SchoolShanghai 201206China

Herein the biowaste by-product spent coffee grounds(SCGs)from coffee industry were incorporated into asphalt binders for performance *** the analysis of Fourier transform infrared spectroscopy(FTIR),differential scanning calorimetry(DSC),dynamic shear rheometer(DSR),and Brookfield viscosity rheometer,it is confirmed that SCGs have potential prospects as bio-waste modifiers in the application of sustainable *** demonstrated that the modification process was mainly based on physical *** with that of the neat asphalt,the shearing stress-resistant ability and high-temperature performance of the SCGs modified binders with the appropriate addition presented a bit of improvement;whereas the binders with 1%and 3%SCGs exhibited remarkably enhanced low-temperature ***,notable weaknesses of practical performance were shown for the binder with excessive content of SCGs,indicating the necessity of proportion selecting before application.

关键词： Spent coffee grounds Asphalt binder Bio-waste management rheology properties Microstructure

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Viscoelastic properties and Molecular Dynamics Simulation of Cationic Surfactant/Aromatic Salt Mixed Solutions

Viscoelastic Properties and Molecular Dynamics Simulation of...

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中国化学会第十九届全国化学热力学和热分析学术会议

作者： Yao Chunhong Liu Qi Wang Suxu Jia Lihan Lv Dongmei Wei Xilian College of Chemistry and Chemical Engineering Liaocheng University

Surfactant molecules tend to form various self-aggregates in aqueous media,such as spherical or wormlike micelles,vesicle and liquid crystal(lamellar,hexagonal and cubic structure).Among these various microstructures,wormlike micelles have attracted much interest in fundamental research and practical applications over the past several decades due to their peculiar micellar structure and fascinatingly rich nonlinear rheological *** understand how wormlike micellar structure is related to the chemical composition of the surfactant solutions,and in turn,how the structural characters of the aggregates can be adjusted by specific control parameters,and how these direct the bulk properties,offers a considerable research ***,we choose a cationic surfactant 3-hexadecyloxy-2-hydroxy-propyl trimethyl ammonium bromide(RHTAB) and is mixed with different aromatic co-solutes(sodium salicylate,sodium 1-hydroxynaphthalene-2-carboxylate and sodium 2-hydroxynaphthalene-3-carboxylate) as additives to construct a series of wormlike micellar *** effects of three aromatic salts on the morphological transformation of RHTAB micelles in solution were investigated by means of rheology,(Cryo-TEM,1 H NMR and molecular dynamics simulation MDS).According to the molecular structure of added salts,the influence of hydroxyl substituent position on formation and growth of wormlike micelles was discussed by the rheological parameters and the calculated results,and the change in micellar structure resulting from increasing additive concentrations was observed using *** weak interaction between counterions and surfactant molecules was analyzed by using steady state and dynamic rheological curve,1 H NMR spectrogram and a RDG *** main objectives of this study were to understand the differences in the self-assembly RHTAB into wormlike micelles in the presence of different salts,and to examine how the properties and molecular structure of the added salts,in partic

关键词： Cationic surfactant dynamics simulation rheology properties

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