Water-Induced Structural Rearrangements on the Nanoscale in Ultrathin Nanocellulose Films

Brett, CalvinKTH,Teknisk mekanik,Wallenberg Wood Science Center,Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany (författare)

QC 20200916
Many nanoscale biopolymer building blocks with defect-free molecular structure and exceptional mechanical properties have the potential to surpass the performance of existing fossil-based materials with respect to barrier properties, load-bearing substrates for advanced functionalities, as well as light-weight construction. Comprehension and control of performance variations of macroscopic biopolymer materials caused by humidity-driven structural changes at the nanoscale are imperative and challenging. A long-lasting challenge is the interaction with water molecules causing reversible changes in the intrinsic molecular structures that adversely affects the macroscale performance. Using in situ advanced X-ray and neutron scattering techniques, we reveal the structural rearrangements at the nanoscale in ultrathin nanocellulose films with humidity variations. These reversible rearrangements are then correlated with wettability that can be tuned. The results and methodology have general implications not only on the performance of cellulose-based materials but also for hierarchical materials fabricated with other organic and inorganic moisture-sensitive building blocks.

Mittal, NiteshKTH,Wallenberg Wood Science Center,Mekanik(Swepub:kth)u16e8jvr (författare)
Ohm, WiebkeDeutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607, Hamburg, Germany (författare)
Gensch, MarcDeutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607, Hamburg, Germany (författare)
Kreuzer, Lucas P.Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607, Hamburg, Germany (författare)
Körstgens, VolkerLehrstuhl für Funktionelle Materialien, Physik-Department, and ¶ Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universitat ̈ München, Garching 85748, Germany (författare)
Månsson, Martin,As. Prof.1976-KTH,Material- och nanofysik(Swepub:kth)u1sajjx0 (författare)
Frielinghaus, HenrichJülich Centre for Neutron Science at MLZ (författare)
Müller-Buschbaum, PeterLehrstuhl für Funktionelle Materialien, Physik-Department, and ¶ Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universitat ̈ München, Garching 85748, Germany (författare)
Söderberg, DanielKTH,Wallenberg Wood Science Center,Teknisk mekanik(Swepub:kth)u1rp1v6z (författare)
Roth, Stephan V.KTH,Biokompositer(Swepub:kth)u1b0mjzr (författare)
KTHTeknisk mekanik (creator_code:org_t)

Ingår i:Macromolecules: American Chemical Society (ACS)52:12, s. 4721-47280024-92971520-5835

Av författaren/redakt...: Brett, Calvin; Mittal, Nitesh; Ohm, Wiebke; Gensch, Marc; Kreuzer, Lucas P ...; Körstgens, Volke ...; visa fler...; Månsson, Martin, ...; Frielinghaus, He ...; Müller-Buschbau ...; Söderberg, Danie ...; Roth, Stephan V.; visa färre...

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