Layered perovskite nanosheets bearing fluoroalkoxy groups: Their preparation and application in epoxy-based hybrids

Yuta Asai, Yusuke Ariake, Hitomi Saito, Naokazu Idota, Kimihiro Matsukawa, Takashi Nishino, Yoshiyuki Sugahara

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Nanosheets bearing CF3(CF2)7C 2H4O groups on their surface were prepared from a CF 3(CF2)7C2H4O derivative of ion-exchangeable layered perovskite HLaNb2O7· xH2O (HLaNb) via exfoliation, and were further utilized to prepare epoxy-based hybrids. The CF3(CF2)7C 2H4O derivative of HLaNb (C10F-HLaNb) was prepared by reacting the n-decoxy derivative of HLaNb with 1H,1H,2H,2H-perfluorodecanol, CF3(CF2)7C2H4OH. TEM and AFM observations revealed that the C10F-HLaNb was exfoliated into individual nanosheets bearing surfaces covered with CF3(CF2) 7C2H4O groups after ultrasonication in acetonitrile. The nanosheet dispersion in acetonitrile was employed to prepare epoxy-based hybrids, and the FE-TEM image of the epoxy-based hybrid with 5 mass% of the nanosheets (C10F-HLaNb/epoxy-5) showed that the nanosheets were dispersed in the epoxy matrix. Thermogravimetry of C10F-HLaNb/epoxy-5 and neat epoxy resin indicated that the initial mass loss due to water decreased and the thermal decomposition retarded by introducing C10F-HLaNb nanosheets. Dynamic mechanical thermal analysis revealed that the glass transition temperature of C10F-HLaNb/epoxy-5 (161 °C) was higher than that of neat epoxy resin (110 °C). These results clearly exhibit that thermal properties were improved by incorporating nanosheets bearing hydrophobic CF3(CF2) 7C2H4O groups in the epoxy resin most likely due to a decrease in water content. A water uptake test demonstrated that the water uptake rate of C10F-HLaNb/epoxy-5 was lower than that of the neat epoxy. This journal is

Original languageEnglish
Pages (from-to)26932-26939
Number of pages8
JournalRSC Advances
Volume4
Issue number51
DOIs
Publication statusPublished - 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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