NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2019, 10 (5), P. 585–598
Hydrophobization of up-conversion luminescent films based on nanocellulose/MF2:Ho particles (M = Sr, Ca) by acrylic resin
A. A. Luginina – Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia
S.V. Kuznetsov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia
V.V. Voronov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia
A. D. Yapryntsev – Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninskii prosp. 31, Moscow, 119991, Russia
V. K. Ivanov – Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninskii prosp. 31, Moscow, 119991, Russia
D. I. Petukhov – Lomonosov Moscow State University, Chemical department, Leninskie Gory str. 1, Moscow, 119991, Russia
A. A. Lyapin – Ogarev Mordovia State University, Bolshevistskaya str. 68, Saransk, 430005, Russia
A. S. Ermakov – Ogarev Mordovia State University, Bolshevistskaya str. 68, Saransk, 430005, Russia
D.V. Pominova – Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia
E.V. Chernova – Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia
A. A. Pynenkov – Ogarev Mordovia State University, Bolshevistskaya str. 68, Saransk, 430005, Russia
K. N. Nishchev – Ogarev Mordovia State University, Bolshevistskaya str. 68, Saransk, 430005, Russia
P. P. Fedorov – Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov str. 38, Moscow, 119991, Russia; ppfedorov@yandex.ru
Luminescent hydrophobic composite films based on nanocrystalline (CNC) and nanofibrillated (CNF) cellulose matrix with up-conversion MF2:Ho (M = Ca, Sr) particles and acrylic resin (ACR) as a coating have been synthesized. Flexible, translucent composite films were obtained by molding from the CNC/CNF suspensions with up-conversion particles. ACR coating was applied to the composite film by spraying. Studies have shown that ACR coating with a layer thickness of 7 – 10 μm provides hydrophobic properties for the films, increasing the water contact angle up to 100±2° with a simultaneous improvement in the luminescent properties. Transparency of CNC/CNF/MF2:Ho-ACR films in the visible and near IR region improves by 20 – 25 % without compromising the flexibility and thermal stability. The manufactured water-resistant composite films can be utilized as potential photonics materials, in particular for visualization of near-IR laser radiation and luminescent labels.
Keywords: cellulose nanocrystals, cellulose nanofibrils, nanocomposites, hydrophobicity, acrylic resins, SrF2:Ho, CaF2:Ho, up-conversion luminescence films.
DOI 10.17586/2220-8054-2019-10-5-585-598
