Abstract
A film with “brick-and-mortar” structure was prepared by layer-by-layer (LBL) technique using polyvinyl alcohol (PVA) and polymethyl methacrylate (PMMA) as the flexible material or “mortar” and mica as the rigid material or “brick”. The film deposited on a glass slide after self-assembly cycles had a thickness of 3 µm thick and an uneven, wavy surface. The film exhibits enhanced mechanical properties, i e, the hardness and indentation modulus values could reach 6.14 and 68.41 GPa, respectively. The hardness and elastic toughness were found to be depended on three factors, i e, the ratio of PVA to mica, the number of self-assembly cycles, and the pretreatment method of the mica suspension. The self-assembly process was driven by formation of the hydrogen bonds between the silanol groups of mica and the hydroxyl groups of PVA and carbonyl groups of PMMA.
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Funded by the Wuhan Science and Technology Bureau (No. 2020020601012279)
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Gao, Y., Liu, P., Yang, L. et al. Biomimetic “Nacre-like” Films Prepared via Layer-by-Layer Self-assembly of Mica, Polyvinyl Alcohol and Polymethyl Methacrylate. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 37, 554–558 (2022). https://doi.org/10.1007/s11595-022-2565-4
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DOI: https://doi.org/10.1007/s11595-022-2565-4