Isolation of oxidized nanocellulose from rice straw using the ammonium persulfate method

Oxidized nanocellulose was isolated from rice straw using the ammonium persulfate method. The effect of cellulose isolation methods such as a multistep process, pretreatments using NaOH and HO on the properties of the nanocellulose were studied. Oxidized cellulose nanofibrils showed long fibrils of the web-like structure with the diameter of 14 nm, while oxidized-cellulose nanocrystals displayed a needle shape with the length of 118–212 nm and the width of 12–19 nm depending on the isolation method of cellulose. Properties of the oxidized-nanocellulose such as shape, size, crystallinity, and thermal stability were influenced significantly by the cellulose isolation method.