| LAKOVAARA, Matias, Juho Antti SIRVIÖ, Rafal SLIZ, Július VIDA, Tomáš HOMOLA and Henrikki LIIMATAINEN. Modification of nanocellulose films in deep eutectic solvents using vinyl esters. Cellulose. Springer, 2022, vol. 29, No 17, p. 9073-9087. ISSN 0969-0239. Available from: https://dx.doi.org/10.1007/s10570-022-04840-y. |
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@article{2220957,
author = {Lakovaara, Matias and Sirviö, Juho Antti and Sliz, Rafal and Vida, Július and Homola, Tomáš and Liimatainen, Henrikki},
article_number = {17},
doi = {http://dx.doi.org/10.1007/s10570-022-04840-y},
keywords = {Cellulose nanofibers; Deep eutectic solvents; Esterification; Film; Vinyl esters},
language = {eng},
issn = {0969-0239},
journal = {Cellulose},
title = {Modification of nanocellulose films in deep eutectic solvents using vinyl esters},
url = {https://link.springer.com/article/10.1007/s10570-022-04840-y},
volume = {29},
year = {2022}
}
TY - JOUR
ID - 2220957
AU - Lakovaara, Matias - Sirviö, Juho Antti - Sliz, Rafal - Vida, Július - Homola, Tomáš - Liimatainen, Henrikki
PY - 2022
TI - Modification of nanocellulose films in deep eutectic solvents using vinyl esters
JF - Cellulose
VL - 29
IS - 17
SP - 9073-9087
EP - 9073-9087
PB - Springer
SN - 09690239
KW - Cellulose nanofibers
KW - Deep eutectic solvents
KW - Esterification
KW - Film
KW - Vinyl esters
UR - https://link.springer.com/article/10.1007/s10570-022-04840-y
N2 - The hydrophilicity of nanocellulose materials mitigates their good mechanical and oxygen barrier properties when exposed to humid conditions. It also limits nanocellulose use in many applications where water is present. This study reveals hydrophobic modification of cellulose nanofiber (CNF) films with vinyl esters of variable alkyl chain length using deep eutectic solvent (DES) of imidazole and triethylmethylammonium chloride as a reaction medium. Additionally, the influence of ultraviolet-ozone (UV/O-3) pretreatment on CNF film modification in DES was addressed. The esterification of CNF films in DES was proven to be a simple and fast approach to increase the hydrophobicity of the films (increasing the contact angle from 38 degrees to 107 degrees), requiring only a 15 min reaction time and reaction temperature of 80 degrees C. Moreover, the modification improved water vapor barrier properties of the films and resulted in improved mechanical properties at wet state, especially with films treated with UV and ozone before modification.
ER -
LAKOVAARA, Matias, Juho Antti SIRVIÖ, Rafal SLIZ, Július VIDA, Tomáš HOMOLA and Henrikki LIIMATAINEN. Modification of nanocellulose films in deep eutectic solvents using vinyl esters. \textit{Cellulose}. Springer, 2022, vol.~29, No~17, p.~9073-9087. ISSN~0969-0239. Available from: https://dx.doi.org/10.1007/s10570-022-04840-y.
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