LAKOVAARA, Matias, Juho Antti SIRVIÖ, Rafal SLIZ, Július VIDA, Tomáš HOMOLA a Henrikki LIIMATAINEN. Modification of nanocellulose films in deep eutectic solvents using vinyl esters. Cellulose. Springer, 2022, roč. 29, č. 17, s. 9073-9087. ISSN 0969-0239. Dostupné z: 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 a Henrikki LIIMATAINEN. Modification of nanocellulose films in deep eutectic solvents using vinyl esters. \textit{Cellulose}. Springer, 2022, roč.~29, č.~17, s.~9073-9087. ISSN~0969-0239. Dostupné z: https://dx.doi.org/10.1007/s10570-022-04840-y.
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