TY - JOUR
T1 - High-Throughput Tailoring of Nanocellulose Films
T2 - From Complex Bio-Based Materials to Defined Multifunctional Architectures
AU - Khakalo, Alexey
AU - Mäkelä, Tapio
AU - Johansson, Leena-Sisko
AU - Orelma, Hannes
AU - Tammelin, Tekla
N1 - Funding Information:
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 760876. Mykola Ivanchenko and Unto Tapper are thanked for carrying out the cross section preparations for SEM imaging; Juha Mannila is acknowledged for assisting with plasma deposition process; Vuokko Liukkonen, Katja Pettersson, and Hille Rautkoski are thanked for performing contact angle, AFM, and barrier measurements, respectively. This work was part of the Academy of Finland Flagship Programme under project nos. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES).
PY - 2020
Y1 - 2020
N2 - This paper demonstrates a high-throughput approach to fabricate nanocellulose films with multifunctional performance using conventionally existing unit operations. The approach comprises cast-coating and direct interfacial atmospheric plasma-assisted gas-phase modification along with the microscale patterning technique (nanoimprint lithography, NIL), all applied in roll-to-roll mode, to introduce organic functionalities in conjunction with structural manipulation. Our strategy results in multifunctional cellulose nanofibrils (CNF) films in which the high optical transmittance (∼90%) is retained while the haze can be adjusted (2-35%). Concomitantly, the hydrophobic/hydrophilic balance can be tuned (50-21 mJ/m2 with the water contact angle ranging from ∼20 up to ∼120°), while intrinsic hygroscopicity of CNF films is not significantly compromised. Therefore, a challenge to produce multifunctional bio-based materials with properties defined by various high-performance applications conjoined to the lack of efficient processing strategies is elucidated. Overall, economically and ecologically viable strategy, which was realized by facile and upscalable unit operations using the R2R technology, is introduced to expand the properties' spaces and thus offer a vast variety of interesting applications for CNF films.
AB - This paper demonstrates a high-throughput approach to fabricate nanocellulose films with multifunctional performance using conventionally existing unit operations. The approach comprises cast-coating and direct interfacial atmospheric plasma-assisted gas-phase modification along with the microscale patterning technique (nanoimprint lithography, NIL), all applied in roll-to-roll mode, to introduce organic functionalities in conjunction with structural manipulation. Our strategy results in multifunctional cellulose nanofibrils (CNF) films in which the high optical transmittance (∼90%) is retained while the haze can be adjusted (2-35%). Concomitantly, the hydrophobic/hydrophilic balance can be tuned (50-21 mJ/m2 with the water contact angle ranging from ∼20 up to ∼120°), while intrinsic hygroscopicity of CNF films is not significantly compromised. Therefore, a challenge to produce multifunctional bio-based materials with properties defined by various high-performance applications conjoined to the lack of efficient processing strategies is elucidated. Overall, economically and ecologically viable strategy, which was realized by facile and upscalable unit operations using the R2R technology, is introduced to expand the properties' spaces and thus offer a vast variety of interesting applications for CNF films.
KW - cellulose nanofibrils film
KW - light management
KW - plasma polymerization
KW - surface chemical modification
UR - http://www.scopus.com/inward/record.url?scp=85096023029&partnerID=8YFLogxK
U2 - 10.1021/acsabm.0c00576
DO - 10.1021/acsabm.0c00576
M3 - Article
SN - 2576-6422
VL - 3
SP - 7428
EP - 7438
JO - ACS Applied Bio Materials
JF - ACS Applied Bio Materials
IS - 11
ER -