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Regulating Crystalline Phase/Plane of Polymer Electrolyte for Rapid Lithium Ion Transfer.
Angew Chem Int Ed Engl
December 2024
School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China.
Electronic-rich functional groups and flexible segments have long been perceived to be the decisive factors influencing lithium-ion transfer in polymer electrolytes, while crystallinity is regarded as the great scourge. Actually, the research on the influence of crystalline phase and crystalline plane is still in scarcity. Herein, taking poly(vinylidene fluoride)-hexafluoropropylene (PVDF-HFP) as an example, new (111/201) crystal planes (belonged to β-phase) are regulated by dissolving process and clarified by Synchrotron radiation X-ray diffraction and X-ray diffraction.
View Article and Find Full Text PDFStrength enhanced expandable polyvinyl alcohol/chitosan cryogel for non-compressible hemostasis.
Int J Biol Macromol
January 2025
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China; Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, China.
For penetrating and deep non-compressible bleeding, hemostatic materials need to meet the demand of easy filling and rapid expansion to close the wound. However, developing an expandable material with sufficient mechanical strength remains a challenge. This study proposed an improved non-solvent induced phase separation (NIPS) method to prepare polyvinyl alcohol/chitosan (PVA/CS) cryogel with large pore structure (70-75 um) and enhanced mechanical properties.
View Article and Find Full Text PDFLigand-Tuned AgBiS Planar Heterojunctions Enable Efficient Ultrathin Solar Cells.
ACS Nano
December 2024
Walter Schottky Institute, Technical University of Munich, Am Coulombwall 4, 85748 Garching, Germany.
AgBiS quantum dots (ABS QDs) have emerged as highly promising candidates for photovoltaic applications due to their strong sunlight absorption, nontoxicity, and elemental availability. Nevertheless, the efficiencies of ABS solar cells currently fall far short of their thermodynamic limits due in large part to sluggish charge transport characteristics in nanocrystal-derived films. In this study, we overcome this limitation by tuning the surfaces of ABS semiconductor QDs via a solvent-induced ligand exchange (SILE) strategy and provide key insights into the role of surface composition on both - and -type charge transfer doping, as well as long-range charge transport.
View Article and Find Full Text PDFSynergistic effects of deep eutectic solvents on the morphology and performance of polysulfone ultrafiltration membranes.
J Environ Manage
November 2024
Gas Processing Center, College of Engineering, Qatar University, Doha, Qatar.
This study investigates the synthesis of flat sheet asymmetric Polysulfone (PSF) membranes using the Non-Solvent Induced Phase Separation (NIPS) method, enhanced by incorporating Deep Eutectic Solvents (DES) composed of Choline Chloride (ChCl) and DL-Malic Acid (MA). The research explores the individual and combined effects of ChCl and MA on membrane morphology and performance. Comprehensive characterization techniques, including Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy-Universal Attenuated Total Reflectance (FTIR-UATR), and Atomic Force Microscopy (AFM), were employed to analyze the structural and surface properties of the membranes.
View Article and Find Full Text PDFDynamic Two-Dimensional Covalent Organic Frameworks with Large Solvent-Induced Lattice Expansion.
J Am Chem Soc
October 2024
Faculty of Chemistry and Food Chemistry, TUD Dresden University of Technology, 01217 Dresden, Germany.
Article Synopsis
- Dynamic covalent organic frameworks (COFs) can reversibly change their structure and porosity based on absorbed guest molecules, but earlier advancements primarily focused on 3D frameworks.
- Recent research has produced a set of 2D COFs by varying the lengths of bridge units, resulting in significant solvent-induced volume expansions of up to 85% while maintaining structural integrity.
- These reversible structural changes suggest a promising design approach for 2D COFs that could lead to new applications in areas such as gas separation and sensing technologies.
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