Chemical structures and molar masses of water-soluble TEMPO-oxidized products prepared from 20 % NaOH-treated cellulose.

TEMPO-catalyzed oxidation is a unique method for converting primary C6-hydroxymethyl groups in water-insoluble regenerated cellulose materials to sodium C6-carboxylate groups in water at room temperature to provide water-soluble polyglucuronates. In this study, 20 % NaOH-treated bacterial cellulose (BC), cotton lint (CL), and ramie cellulose (RC) were oxidized to prepare water-soluble polyglucuronates with high degrees of polymerization and high mass recovery ratios. Solid-state CP/MASS C NMR spectra of the water-soluble products indicated that they contained considerable amounts of C2/C3-ketone hydrate structures (50-60 % of glucuronosyl units).

Highly Electroactive Tissue Engineering Scaffolds Based on Nanocellulose/Sulfonated Carbon Nanotube Composite Hydrogels for Myocardial Tissue Repair.

Myocardial infarction (MI) has been a serious threat to the health of modern people for a long time. The introduction of tissue engineering (TE) therapy into the treatment of MI is one of the most promising therapeutic schedules. Considering the intrinsic electrophysiological activity of cardiac tissue, we utilized 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibrils (TOCNs) with excellent biocompatibility as the substrate, and sulfonated carbon nanotubes (SCNTs) with remarkable conductivity and water dispersibility as the electrically active material, to prepare TOCN-SCNT composite hydrogels.