Journal
CARBOHYDRATE POLYMERS
Volume 224, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2019.115173
Keywords
Bacterial cellulose; Aerogel; Quantum dots; Nanofibrillar; Fluorescent
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Funding
- National Natural Science Foundation of China [51603059]
- Fundamental Research Fund for the Central Universities of China [106-4115100027]
- China Postdoctoral Science Foundation
- AnHui Provence Postdoctoral Science Foundation
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Bacterial cellulose (BC) features a nanofibrillar network structure that can provide a good template for quantum dots (QDs), to overcome the fluorescence quenching-effect of QDs in polymer composites. Here, we fabricated novel fluorescent aerogels with tunable emission by covalently binding environmentally-friendly ZnS(CuInS2)/ZnS core-shell quantum dots along the nanofibrillar BC. A new ligand of 3-(mercaptopropyl)trimethoxysilane allows QDs to transfer from toluene to alcohol solvent and stably bind to the BC. After supercritical CO2 drying, the resulting BC-QDs aerogels maintain the porous nanofibrillar morphology of BC with ultra-light-weight, the QDs are well-distributed along the BC fiber surfaces without aggregation. The emission wavelength can be tuned in a wide range from 470 to 750 nm by simply adjusting the QDs core component or shell layers. This work provides a new approach for fabricating QDs-polymer hydrogels and aerogels with well distributed QDs via chemical binding that potential as smart sensor, catalysis, and 3D display applications.
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