TY - JOUR
T1 - High-Resolution Patterned Biobased Thin Films via Self-Assembled Carbohydrate Block Copolymers and Nanocellulose
AU - Gestranius, Marie
AU - Otsuka, Issei
AU - Halila, Sami
AU - Hermida-Merino, Daniel
AU - Solano, Eduardo
AU - Borsali, Redouane
AU - Tammelin, Tekla
N1 - Funding Information:
M.G. and I.O. contributed equally to this work. This work was partially supported by the CNRS and the European project “GreeNanoFilms” which has received funding from the European Union Seventh Framework Program (FP7/2007‐2013) under grant agreement no. 603519 and Carnot PolyNat Institute (ANR No. 16‐CARN‐025‐01). The work was partially supported by Academy of Finland project CINERGY (ID 300367). The authors acknowledge C. Lancelon‐Pin for the cross‐sectional TEM observation at CERMAV (ICMG Platform‐Grenoble). Katja Pettersson and Suvi Arola (VTT) are acknowledged for assisting AFM imaging. Mari Leino (VTT) is acknowledged for white light interferometry measurements. Anastasia Ivanova (VTT) is acknowledged for assistance with the table of content graphics. The authors would like to thank the DUBBLE team at the ESRF for the assistance during the experiments. This work was a part of the Academy of Finland's Flagship Programme under Project Nos. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES).
Funding Information:
M.G. and I.O. contributed equally to this work. This work was partially supported by the CNRS and the European project ?GreeNanoFilms? which has received funding from the European Union Seventh Framework Program (FP7/2007-2013) under grant agreement no. 603519 and Carnot PolyNat Institute (ANR No. 16-CARN-025-01). The work was partially supported by Academy of Finland project CINERGY (ID 300367). The authors acknowledge C. Lancelon-Pin for the cross-sectional TEM observation at CERMAV (ICMG Platform-Grenoble). Katja Pettersson and Suvi Arola (VTT) are acknowledged for assisting AFM imaging. Mari Leino (VTT) is acknowledged for white light interferometry measurements. Anastasia Ivanova (VTT) is acknowledged for assistance with the table of content graphics. The authors would like to thank the DUBBLE team at the ESRF for the assistance during the experiments. This work was a part of the Academy of Finland's Flagship Programme under Project Nos. 318890 and 318891 (Competence Center for Materials Bioeconomy, FinnCERES).
Publisher Copyright:
© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4
Y1 - 2020/4
N2 - The exploitation of the effortless self-assembly behavior of biomass-based bricks can be seen as a promising route toward the innovative architectures. Here, a straightforward approach is presented where carbohydrate-based diblock copolymer, polystyrene-block-maltoheptaose (PS-b-MH), is organized either on a rigid ultrathin film or on a flexible self-standing film of wood-derived cellulose nanofibrils (CNFs). During solvent annealing PS-b-MH deposited on relatively rough CNF film undergoes spontaneous rearrangement into high-resolution patterns with a diblock domain spacing of 10–15 nm. The ideal conditions the self-assembly require weak interactions between block copolymer and the substrate to increase the chain mobility and enable rearrangements. This is exactly how the system behaves. Adsorption studies of PS-b-MH on CNF surfaces reveal weak interactions, and the formed PS-b-MH layer is soft and mobile. Even the appearance of more challenging vertical orientation formed on smooth CNF substrates is tentatively evidenced by grazing-incidence small-angle X-ray scattering and atomic force microscope indicating favorable surface interactions between CNF and PS-b-MH.
AB - The exploitation of the effortless self-assembly behavior of biomass-based bricks can be seen as a promising route toward the innovative architectures. Here, a straightforward approach is presented where carbohydrate-based diblock copolymer, polystyrene-block-maltoheptaose (PS-b-MH), is organized either on a rigid ultrathin film or on a flexible self-standing film of wood-derived cellulose nanofibrils (CNFs). During solvent annealing PS-b-MH deposited on relatively rough CNF film undergoes spontaneous rearrangement into high-resolution patterns with a diblock domain spacing of 10–15 nm. The ideal conditions the self-assembly require weak interactions between block copolymer and the substrate to increase the chain mobility and enable rearrangements. This is exactly how the system behaves. Adsorption studies of PS-b-MH on CNF surfaces reveal weak interactions, and the formed PS-b-MH layer is soft and mobile. Even the appearance of more challenging vertical orientation formed on smooth CNF substrates is tentatively evidenced by grazing-incidence small-angle X-ray scattering and atomic force microscope indicating favorable surface interactions between CNF and PS-b-MH.
KW - carbohydrate-based block copolymers
KW - cellulose nanofibrils
KW - green materials
KW - self-assembly
KW - thin films
UR - http://www.scopus.com/inward/record.url?scp=85079699180&partnerID=8YFLogxK
U2 - 10.1002/admi.201901737
DO - 10.1002/admi.201901737
M3 - Article
AN - SCOPUS:85079699180
VL - 7
JO - Advanced Materials Interfaces
JF - Advanced Materials Interfaces
SN - 2196-7350
IS - 7
M1 - 1901737
ER -