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Bioinspired Interface Engineering for Moisture Resistance in Nacre-Mimetic Cellulose Nanofibrils/Clay Nanocomposites
KTH, School of Biotechnology (BIO), Glycoscience. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Biotechnology (BIO).
KTH, School of Biotechnology (BIO).
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2017 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 9, no 23, 20169-20178 p.Article in journal (Refereed) Published
Abstract [en]

The interfacial adhesion design between "mortar" and "bricks" is essential for mechanical and barrier performance of nanocellulose-based nacre-mimetic nanocomposites, especially at high moisture conditions. To address this fundamental challenge, dopamine (DA) has been conjugated to cellulose nanofibrils (CNFs) and subsequently assembled with montmorillonite (MTM) to generate layered nanocomposite films inspired by the strong adhesion of mussel adhesive proteins to inorganic surfaces under water. The selective formation of catechol/metal ion chelation and hydrogen bonding at the interface between MTM platelets and CNFs bearing DA renders transparent films with strong mechanical properties, particularly at high humidity and in wet state. Increasing the amount of conjugated DA on CNFs results in nanocomposites with increased tensile strength and modulus, up to 57.4 MPa and 1.1 GPa, respectively, after the films are swollen in water. The nanocomposites also show excellent gas barrier properties at high relative humidity (95%), complementing the multifunctional property profile.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017. Vol. 9, no 23, 20169-20178 p.
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-210276DOI: 10.1021/acsami.7b02177ISI: 000403631300090Scopus ID: 2-s2.0-85020835882OAI: oai:DiVA.org:kth-210276DiVA: diva2:1118263
Note

QC 20170630

Available from: 2017-06-30 Created: 2017-06-30 Last updated: 2017-07-11Bibliographically approved

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Yao, KunHuang, ShuTang, HuBerglund, Lars A.Zhou, Qi
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GlycoscienceWallenberg Wood Science CenterSchool of Biotechnology (BIO)Fibre and Polymer Technology
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CiteExportLink to record
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