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Xin Zhao,Fangchao Cheng,Yingcheng Hu 한국섬유공학회 2021 Fibers and polymers Vol.22 No.1
Cellulose nanofibrils (CNFs) were successfully isolated from agro-industrial waste (cornstalk, corn flesh, andcorncob) by subjecting the raw materials to organosolv and peroxide treatment, followed by ultrasonication. A detailedcomparative study was performed. Characterization results showed that the CNFs from cornstalk (CS) exhibited higher yieldand lignin content (20.81 %), compared with CNFs from corn flesh (CF) and corncob (CC). The CNFs from CF and CCexhibited similar morphology, particle size, crystallinity, and thermal stability but showed improved ultraviolet blockingability and optical transparency relative to those of CS. The CNFs from CF showed higher dispersion stability andmechanical properties than those from CS and CC. Peroxide treatment negatively influenced crystallinity and thermalstability, but exerted no apparent effect on optical transparency and mechanical strength. Thus, this study demonstrates thatagro-industrial wastes are sustainable resources for CNF production, which can potentially have a wide range of value-addedapplications. Ionic liquid-aided solvothermal treatment followed by ultrasonication is a facile and ideal method to produceCNFs with ultraviolet blocking ability.