Design and Physicochemical Characterization of Novel Organic-Inorganic Hybrids from Natural Aluminosilicate Nanotubes

A. Takahara, Y. Higaki

Research output: Chapter in Book/Report/Conference proceedingChapter

7 Citations (Scopus)

Abstract

Surface functionalization of tubular nano-clays of imogolite and halloysite using the selective binding of organophosphonic acids and organosilane compounds, and the use of the surface modified nanotubes in polymer hybrids were studied. Surface modification of imogolite with alkyl phosphonic acid salt through the specific interaction of phosphonic acid and the exterior alumina sites of imogolite was presented. SI-ATRP was performed with the selectively adsorbed phosphonic acid functionalized ATRP-initiator to prepare polymer brushes on the imogolite surface. Selective modification of halloysite nanotube exterior and inner surfaces was demonstrated. Aqueous phosphonic acid binds to alumina sites at the tube lumen to make the lumen hydrophobic. Subsequent modification with organosilane affords bifunctionalized halloysites with both the lumen and exterior surface modified. Loading of hydrophobic organic compound to the modified lumen was confirmed. SI-ATRP was performed through the selectively adsorbed DOPA-functionalized ATRP-initiator to prepare polymer brushes on the nanotube lumen. Also, surface modified halloysite was applied for preparation of novel intelligent polyurethane nanocomposites with improved thermal stability and mechanical properties.

Original languageEnglish
Title of host publicationSelf-Cleaning Coatings
Subtitle of host publicationStructure, Fabrication and Application
EditorsBaochun Guo, Rawil F. Fakhrullin, Yuri Lvov
PublisherRoyal Society of Chemistry
Pages131-156
Number of pages26
Edition22
DOIs
Publication statusPublished - Jan 1 2017

Publication series

NameRSC Smart Materials
Number22
Volume2017-January
ISSN (Print)2046-0066
ISSN (Electronic)2046-0074

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomedical Engineering
  • Materials Science(all)
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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