Rapeseed hull, a by product in rapeseed processing, deserves deep research for extensive application to promote its limited value at present. The aim of this study was to explore utilization of rapeseed hull as a sour...Rapeseed hull, a by product in rapeseed processing, deserves deep research for extensive application to promote its limited value at present. The aim of this study was to explore utilization of rapeseed hull as a source of raw material for nanocellulose. On the basis of pretreatment with sodium hydroxide solution and peroxide solution, nanocellulose from rapeseed hull(NRH) was prepared by sulfuric acid hydrolysis. Samples of different pretreatment stages were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, infrared spectrum and thermo-gravimetric analysis. Results showed that sodium hydroxide solution and peroxide solution pretreatment could significantly increase cellulose content of the material(p < 0.05). NRH prepared by sulfuric acid hydrolysis was of short rod structure, 50-250 nm in length with diameter of 5-25 nm. It had a typical type of celluloseⅠcrystal with 64.4% crystallinity. Initial thermal decomposition temperature of NRH was the lowest among all samples. NRH was expected to be applied in biodegradable composites. Therefore, this work will provide reference for further utilization of rapeseed hull as a low-cost source of nanocellulose.展开更多
基金financial support of the National Natural Science Foundation of China (No. 31772010)the Technical System of Modern Agricultural Industry (CARS-13)
文摘Rapeseed hull, a by product in rapeseed processing, deserves deep research for extensive application to promote its limited value at present. The aim of this study was to explore utilization of rapeseed hull as a source of raw material for nanocellulose. On the basis of pretreatment with sodium hydroxide solution and peroxide solution, nanocellulose from rapeseed hull(NRH) was prepared by sulfuric acid hydrolysis. Samples of different pretreatment stages were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, infrared spectrum and thermo-gravimetric analysis. Results showed that sodium hydroxide solution and peroxide solution pretreatment could significantly increase cellulose content of the material(p < 0.05). NRH prepared by sulfuric acid hydrolysis was of short rod structure, 50-250 nm in length with diameter of 5-25 nm. It had a typical type of celluloseⅠcrystal with 64.4% crystallinity. Initial thermal decomposition temperature of NRH was the lowest among all samples. NRH was expected to be applied in biodegradable composites. Therefore, this work will provide reference for further utilization of rapeseed hull as a low-cost source of nanocellulose.
