Abstract
Sol–gel coating of metal oxides on polymer substrates is a useful process to fabricate various organic–inorganic hybrid materials under mild conditions. However, this process is hardly applicable to pristine polyimide (PI) films because their surfaces do not display effective functional groups for metal oxide coatings. In this study, we firstly examined direct sol–gel coating of titania thin layers on unmodified PI film surfaces. The results confirmed homogeneous, ultrathin titania layer coating and showed that the thickness and microscopic morphology of the titania layers were affected by titanium alkoxide concentrations in the spin coating solutions. We next investigated titania layer coating on surface-modified PI films that prepared using alkaline hydrolysis, which generated carboxylic acid groups on the film surfaces. Optimal hydrolysis time was determined using FT-IR spectroscopy and contact angle measurements. After sol–gel titania coating on the hydrolyzed PI film surfaces, the Scotch tape test was conducted to evaluate adhesion strength between the titania layers and PI film surfaces. Morphological observations of the sample surfaces after the tests clearly showed that surface modification of PI films increased titania layer adhesions. Effect of hydrothermal treatments on film formability and adhesion strength between titania-PI film interfaces was also evaluated.
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References
Brinker CJ, Scherer GW (1990) Sol–gel science, the physics and chemistry of sol–gel processing. Academic Press, San Diego
Kozuka H (2006) J Sol–Gel Sci Technol 40:287–297
Inagaki N, Tasaka S, Onodera A (1998) J Appl Polym Sci 73:1645–1654
Wang C–C, Ying JY (1999) Chem Mater 11:3113–3120
Matsuda A, Matoda T, Kogure T, Tadanaga K, Minami T, Tatsumisago M (2003) J Sol–Gel Sci Technol 27:61–69
Langlet M, Kim A, Audier M, Herrmann JM (2002) J Sol–Gel Sci Technol 25:223–234
Asakuma N, Fukui T, Toki M, Imai H (2003) J Sol–Gel Sci Technol 27:91–95
Akamatsu K, Ikeda S, Nawafune H, Deki S (2003) Chem Mater 15:2488–2491
Wu Z, Wu D, Yang W, Jin R (2006) J Mater Chem 16:310–316
Kong Y, Shao J, Wang W, Chen Z, Chu H (2009) J Appl Polym Sci 111:2044–2048
Hashizume M, Kunitake T (2003) Langmuir 19:10172–10178
Hashizume M, Kunitake T (2006) Soft Matter 2:135–140
Ishida H, Wellinghoff ST, Bear E, Koenig JL (1980) Macromolecules 13:826–834
Lee KW, Kowalczyk SP, Shaw JM (1990) Macromolecules 23:2097–2100
Stephans LE, Myles A, Thomas RR (2000) Langmuir 16:4706–4710
Ichinose I, Kawakami T, Kunitake T (1998) Adv Mater 10:535–539
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Hashizume, M., Hirashima, M. Sol–gel titania coating on unmodified and surface-modified polyimide films. J Sol-Gel Sci Technol 62, 234–239 (2012). https://doi.org/10.1007/s10971-012-2717-7
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DOI: https://doi.org/10.1007/s10971-012-2717-7