TEMPO-oxidized cellulose nanofibers (TOCNs)-based composite materials are reported. Single-walled carbon nanotubes (SWNTs) with carboxylate groups on their surfaces were successfully dispersed in an aqueous suspension of TOCNs, and then were fabricated into a composite film by a simple cast method. The as-prepared SWNTs/TOCNs composite film was self-standing, flexible, and had some degree of optical transparency (transmittance at 600 nm: ca. 50%) and conductivity (resistance value: ca. 200-1000 O). In addition, topochemical modification of TOCNs with gold nanoparticles (AuNPs) or copper ions (Cu(I)) was achieved by use of carboxylate groups as selective sites for immobilization of AuNPs and Cu(I). The as-prepared AuNPs@TOCNs composite demonstrated an excellent catalytic efficiency: the turnover frequency of the AuNPs@TOCNs was up to 840 times that of conventional polymer-supported AuNPs, for an aqueous reduction of 4-nitrophenol to 4-aminophenol with NaBH4. The Cu(I)/TOCNs aerogel exhibited a high catalytic performance for the azide-alkyne Huisgen [3+2] cycloaddition.

Functional nanocomposites based on TEMPO-oxidized cellulose nanofibers

243rd National Meeting (2012)

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