Preparation of epoxy-based hybrid films from an aqueous TiO2 dispersion via solvent exchange and surface modification with n-octylphosphonic acid

Taichi Kaneko, Yoshitaka Kamochi, Hiroyuki Yamamoto, Kimihiro Matsukawa, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Transparent TiO2/epoxy hybrid films with high refractive indices have been prepared from a 9-mass% aqueous TiO2 (rutile form) dispersion by a combination of dispersion medium exchange and surface modification with n-octylphosphonic acid (OPA). The dispersion medium was exchanged from H2O to N-methylformamide (NMF) by distilling off H2O after the addition of NMF. The TiO2 surface was then modified with OPA by heating at 80°C for 24 h. IR and NMR spectra of the OPA-modified TiO2 nanoparticles (NPs) revealed that the OPA moiety was grafted onto the surface of the TiO2 NPs through Ti-O-P bonds. The resulting OPA-modified TiO2 NPs were employed to prepare epoxy-based hybrid films possessing excellent transparency. The transmittance in the entire visible range (400-800 nm) of the hybrid film containing 66.3 mass% TiO2 was above 94%. This hybrid film also exhibited the highest refractive index (n = 1.74), which represented a remarkable increase from that of the pure epoxy resin film (n = 1.51).

    Original languageEnglish
    Pages (from-to)593-601
    Number of pages9
    JournalComposite Interfaces
    Volume19
    Issue number9
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Surface treatment
    methylformamide
    preparation
    acids
    Acids
    Nanoparticles
    nanoparticles
    Refractive index
    refractivity
    Epoxy Resins
    epoxy resins
    Epoxy resins
    rutile
    Transparency
    transmittance
    Nuclear magnetic resonance
    n-octylphosphonic acid
    Heating
    nuclear magnetic resonance
    heating

    Keywords

    • Epoxy resin
    • High refractive index
    • Organic-inorganic hybrids
    • Titania

    ASJC Scopus subject areas

    • Ceramics and Composites
    • Surfaces, Coatings and Films
    • Physics and Astronomy(all)

    Cite this

    Preparation of epoxy-based hybrid films from an aqueous TiO2 dispersion via solvent exchange and surface modification with n-octylphosphonic acid. / Kaneko, Taichi; Kamochi, Yoshitaka; Yamamoto, Hiroyuki; Matsukawa, Kimihiro; Sugahara, Yoshiyuki.

    In: Composite Interfaces, Vol. 19, No. 9, 2012, p. 593-601.

    Research output: Contribution to journalArticle

    Kaneko, Taichi ; Kamochi, Yoshitaka ; Yamamoto, Hiroyuki ; Matsukawa, Kimihiro ; Sugahara, Yoshiyuki. / Preparation of epoxy-based hybrid films from an aqueous TiO2 dispersion via solvent exchange and surface modification with n-octylphosphonic acid. In: Composite Interfaces. 2012 ; Vol. 19, No. 9. pp. 593-601.
    @article{344c7804647f4a2c9c678ce9b6a9df6e,
    title = "Preparation of epoxy-based hybrid films from an aqueous TiO2 dispersion via solvent exchange and surface modification with n-octylphosphonic acid",
    abstract = "Transparent TiO2/epoxy hybrid films with high refractive indices have been prepared from a 9-mass{\%} aqueous TiO2 (rutile form) dispersion by a combination of dispersion medium exchange and surface modification with n-octylphosphonic acid (OPA). The dispersion medium was exchanged from H2O to N-methylformamide (NMF) by distilling off H2O after the addition of NMF. The TiO2 surface was then modified with OPA by heating at 80°C for 24 h. IR and NMR spectra of the OPA-modified TiO2 nanoparticles (NPs) revealed that the OPA moiety was grafted onto the surface of the TiO2 NPs through Ti-O-P bonds. The resulting OPA-modified TiO2 NPs were employed to prepare epoxy-based hybrid films possessing excellent transparency. The transmittance in the entire visible range (400-800 nm) of the hybrid film containing 66.3 mass{\%} TiO2 was above 94{\%}. This hybrid film also exhibited the highest refractive index (n = 1.74), which represented a remarkable increase from that of the pure epoxy resin film (n = 1.51).",
    keywords = "Epoxy resin, High refractive index, Organic-inorganic hybrids, Titania",
    author = "Taichi Kaneko and Yoshitaka Kamochi and Hiroyuki Yamamoto and Kimihiro Matsukawa and Yoshiyuki Sugahara",
    year = "2012",
    doi = "10.1080/15685543.2012.762876",
    language = "English",
    volume = "19",
    pages = "593--601",
    journal = "Composite Interfaces",
    issn = "0927-6440",
    publisher = "Taylor and Francis Ltd.",
    number = "9",

    }

    TY - JOUR

    T1 - Preparation of epoxy-based hybrid films from an aqueous TiO2 dispersion via solvent exchange and surface modification with n-octylphosphonic acid

    AU - Kaneko, Taichi

    AU - Kamochi, Yoshitaka

    AU - Yamamoto, Hiroyuki

    AU - Matsukawa, Kimihiro

    AU - Sugahara, Yoshiyuki

    PY - 2012

    Y1 - 2012

    N2 - Transparent TiO2/epoxy hybrid films with high refractive indices have been prepared from a 9-mass% aqueous TiO2 (rutile form) dispersion by a combination of dispersion medium exchange and surface modification with n-octylphosphonic acid (OPA). The dispersion medium was exchanged from H2O to N-methylformamide (NMF) by distilling off H2O after the addition of NMF. The TiO2 surface was then modified with OPA by heating at 80°C for 24 h. IR and NMR spectra of the OPA-modified TiO2 nanoparticles (NPs) revealed that the OPA moiety was grafted onto the surface of the TiO2 NPs through Ti-O-P bonds. The resulting OPA-modified TiO2 NPs were employed to prepare epoxy-based hybrid films possessing excellent transparency. The transmittance in the entire visible range (400-800 nm) of the hybrid film containing 66.3 mass% TiO2 was above 94%. This hybrid film also exhibited the highest refractive index (n = 1.74), which represented a remarkable increase from that of the pure epoxy resin film (n = 1.51).

    AB - Transparent TiO2/epoxy hybrid films with high refractive indices have been prepared from a 9-mass% aqueous TiO2 (rutile form) dispersion by a combination of dispersion medium exchange and surface modification with n-octylphosphonic acid (OPA). The dispersion medium was exchanged from H2O to N-methylformamide (NMF) by distilling off H2O after the addition of NMF. The TiO2 surface was then modified with OPA by heating at 80°C for 24 h. IR and NMR spectra of the OPA-modified TiO2 nanoparticles (NPs) revealed that the OPA moiety was grafted onto the surface of the TiO2 NPs through Ti-O-P bonds. The resulting OPA-modified TiO2 NPs were employed to prepare epoxy-based hybrid films possessing excellent transparency. The transmittance in the entire visible range (400-800 nm) of the hybrid film containing 66.3 mass% TiO2 was above 94%. This hybrid film also exhibited the highest refractive index (n = 1.74), which represented a remarkable increase from that of the pure epoxy resin film (n = 1.51).

    KW - Epoxy resin

    KW - High refractive index

    KW - Organic-inorganic hybrids

    KW - Titania

    UR - http://www.scopus.com/inward/record.url?scp=84875149505&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84875149505&partnerID=8YFLogxK

    U2 - 10.1080/15685543.2012.762876

    DO - 10.1080/15685543.2012.762876

    M3 - Article

    VL - 19

    SP - 593

    EP - 601

    JO - Composite Interfaces

    JF - Composite Interfaces

    SN - 0927-6440

    IS - 9

    ER -