【摘 要】
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Valuable application prospects and large-scale production technologies are powerful driving forces for the development of materials science.Carbon dots (CDs) are a kind of promising carbon-based fluores-cent nanomaterials,which possess wide application pr
【机 构】
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State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,and
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Valuable application prospects and large-scale production technologies are powerful driving forces for the development of materials science.Carbon dots (CDs) are a kind of promising carbon-based fluores-cent nanomaterials,which possess wide application prospects based and even beyond the fluorescence properties.Herein,we report the fast and high-yield synthesis of CDs and the large-scale preparation of fluorescent nanoflber films with enhanced mechanical properties.CDs were prepared from magnetic hyperthermia treatment of citric acid and carbamide,with the output of 25.37 g in a single batch.The as-prepared CDs exhibit a high absolute photoluminescence (PL) quantum yield (QY) of 67％ and wonderful dispersibility in polar solvents.Then,solution blow spinning of CDs and polymer matrixes of alcohol solu-ble polyurethane (APU) and polyacrylonitrile (PAN) led to large-area fluorescent CDs-embedded nanofiber films,APU/CDs (size:120 cm × 18 cm) and PAN/CDs (size:120 cm × 22 cm),respectively.The resultant large-area APU/CDs and PAN/CDs nanofiber films have dramatically enhanced mechanical properties,to show integrated improvement of tensile strength and elongation.
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