Preparation of inorganic-organic hybrid gels by radical exchange reaction using TiO2 nanoparticles modified with organophosphonic acid bearing C-ON bonds

Kohei Kaneta, Seiichi Tahara, Naokazu Idota, Yoshiyuki Sugahara

Research output: Contribution to journalConference articlepeer-review

Abstract

Inorganic-organic hybrid gels were prepared using TiO2 nanoparticles modified with organophosphonic acid bearing C-ON bonds by a radical exchange reaction. The modification of TiO2 with N-tert-butyl-N-(1-dihydroxyphosphoryl-2,2-dimetylpropyl)aminoxymethyl benzene (DEPN-BA) and isodecyl phosphonic acid (IDP) was confirmed by IR and 31P MAS NMR. ESR spectroscopy indicated the presence of nitroxide radicals with heating of the modified nanoparticles at 120C. Hybrid gels were prepared using TiO2 nanoparticles, which were modified with DEPN-BA and IDP (IDP_DEPN-BA_TiO2), and a poly(4vinylbenzyl chloride) derivative bearing C-ON bonds (PCMS-TEMPO). It was found that the radical exchange reaction with CON bonds was necessary for preparing hybrid gels. It is assumed that a three-dimensional network was formed by crosslinking between the polymers and modified TiO2 nanoparticles.

Original languageEnglish
Pages (from-to)180-186
Number of pages7
JournalMaterials Today: Proceedings
Volume16
DOIs
Publication statusPublished - 2019
Event6th International Symposium on Advanced Ceramics, ISAC 2018 - Sendai, Japan
Duration: 2018 Mar 102018 Mar 12

Keywords

  • Dynamic covalent bond
  • Hybrid gel
  • Radical exchange reaction
  • Surface modification
  • TiO nanoparticle

ASJC Scopus subject areas

  • Materials Science(all)

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