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TEMPO-mediated oxidized nanocellulose incorporating with its derivatives of carbon dots for luminescent hybrid films

Author:
Jiang, Yaoquan, Zhao, Yafei, Feng, Xin, Fang, Jianhui, Shi, Liyi
Source:
RSC advances 2016 v.6 no.8 pp. 6504-6510
ISSN:
2046-2069
Subject:
bamboos, biomass, carbon quantum dots, cellulose, chemical bonding, durability, films (materials), fluorescence, image analysis, oxidation, petroleum, photoluminescence, thermal stability
Abstract:
The first use of nanocellulose extracted from bamboo fibers as a fibrous network skeleton and carbon dots derived from nanocellulose as guest fluorescent nanomaterials to construct a transparent, photoluminescent hybrid film is reported. The primary hydroxyls of nanocellulose are firstly converted to the carboxyl form by using tetramethyl-1-piperidinyloxy (TEMPO)-mediated oxidation to enhance the interfacial interaction with carbon dots and then to assemble heterogeneous network architectures through covalent bonding. The carbon dots derived from TEMPO-mediated oxidized nanocellulose display highly uniform spherical morphology with a narrow size distribution ranging from 6 nm to 11 nm. The resultant nanocellulose-based hybrid film has high transparency in bright field imaging and a strong blue luminescence under ultraviolet excitation. Furthermore, the biocompatible hybrid film extracted from the biomass exhibits excellent thermal stability and outstanding mechanical durability, which could be utilized as a substitute for petroleum-based film for diverse applications.
Agid:
6400451