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- W3047835777 endingPage "116866" @default.
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- W3047835777 abstract "• Composite film based on carboxylated nanocellulose and fluoride phosphor was created. • Composite films were prepared by film casting method using alkyl ketene dimer (AKD). • The use of AKD as modificator resulted in hydrophobic properties of the films. • The film showed the stable up-conversion luminescence under high humidity conditions. • The films demonstrated great potential as visualizers of 2 micron laser radiations. Hydrophobic up-conversion nanocomposite films have been developed based on TEMPO-oxidized cellulose nanofibrils (TOCNF) modified with alkyl ketene dimer (AKD) as a matrix and MF 2 :Ho (M = Ca, Sr) as a phosphor. Fabrication of homogeneous, strong and translucent TOCNF/MF 2 :Ho-AKD films with water contact angle of 123 ± 2° was accomplished with mild drying at 110 °C. These hydrophobic nanocomposite films demonstrated stable up-conversion luminescence in the visible spectral range upon excitation of the 5 I 7 level of Ho 3+ ions by laser irradiation at 1912 nm both under ambient conditions and in a humid atmosphere (92 ± 2% humidity). The absence of luminescence quenching in a high humidity atmosphere for TOCNF/MF 2 :Ho-AKD composite films was considered to be due to the reliable shielding effect of the hydrophobic TOCNF-AKD matrix. The films show promise for visualizing 2 μm laser radiation in medicine and monitoring of the atmosphere." @default.
- W3047835777 created "2020-08-13" @default.
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- W3047835777 date "2020-12-01" @default.
- W3047835777 modified "2023-10-16" @default.
- W3047835777 title "Hydrophobic up-conversion carboxylated nanocellulose/fluoride phosphor composite films modified with alkyl ketene dimer" @default.
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- W3047835777 doi "https://doi.org/10.1016/j.carbpol.2020.116866" @default.
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