Thermally stable cellulose nanospheres prepared from office waste paper by complete removal of hydrolyzed sulfate groups.

Cellulose nanocrystals are commonly obtained by acid hydrolysis, particularly with HSO. However, a small amount of deposited sulfate-groups contributes to the degradation of their thermal stability. This study prepared thermally-stable and sulfate-group-free cellulose nanospheres (CNSs) from office waste paper by HSO hydrolysis followed by solvolytic desulfation.