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Download fileLuminescent and Transparent Nanopaper Based on Rare-Earth Up-Converting Nanoparticle Grafted Nanofibrillated Cellulose Derived from Garlic Skin
journal contribution
posted on 2014-09-10, 00:00 authored by Jingpeng Zhao, Zuwu Wei, Xin Feng, Miao Miao, Lining Sun, Shaomei Cao, Liyi Shi, Jianhui FangHighly flexible, transparent, and
luminescent nanofibrillated cellulose
(NFC) nanopaper with heterogeneous network, functionalized by rare-earth
up-converting luminescent nanoparticles (UCNPs), was rapidly synthesized
by using a moderate pressure extrusion paper–making process.
NFC was successfully prepared from garlic skin using an efficient
extraction approach combined with high frequency ultrasonication and
high pressure homogenization after removing the noncellulosic components.
An efficient epoxidation treatment was carried out to enhance the
activity of the UCNPs (NaYF4:Yb,Er) with oleic acid ligand
capped on the surface. The UCNPs after epoxidation then reacted with
NFC in aqueous medium to form UCNP-grafted NFC nanocomposite (NFC–UCNP)
suspensions at ambient temperature. Through the paper-making process,
the assembled fluorescent NFC–UCNP hybrid nanopaper exhibits
excellent properties, including high transparency, strong up−conversion
luminescence, and good flexibility. The obtained hybrid nanopaper
was characterized by transmission electron microscopy (TEM), atomic
force microscope (AFM), Fourier transform infrared spectroscopy (FTIR),
field emission-scanning electron microscope (FE-SEM), up−conversion
luminescence (UCL) spectrum, and ultraviolet and visible (UV–vis)
spectrophotometer. The experimental results demonstrate that the UCNPs
have been successfully grafted to the NFC matrix with heterogeneous
network. And the superiorly optical transparent and luminescent properties
of the nanopaper mainly depend on the ratio of UCNPs to NFC. Of importance
here is that, NFC and UCNPs afford the nanopaper a prospective candidate
for multimodal anti-counterfeiting, sensors, and ion probes applications.
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Transparent NanopaperFTIRextraction approachNFC matrixion probes applicationsnanofibrillated cellulosepressure homogenizationambient temperaturenanopaper exhibitsfrequency ultrasonicationAFMepoxidation treatmentUVGarlic SkinHighlynoncellulosic componentsTEMtransmission electron microscopygarlic skinforce microscopeoleic acid ligandUCLUCNP