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Preparation of Wheat Straw Nanocellulose by Acid Hydrolysis Assisted High Pressure Homogenization
Received:January 18, 2020  
DOI：10.11981/j.issn.1000-6842.2020.03.01
Key Words:wheat straw;nanocellulose;nanocellulose whisker;sulfuric acid hydrolysis;high pressure homogenization
Fund Project:广西清洁化制浆造纸与污染控制重点实验室开放基金（ZR201806-6）；南宁市科学研究与技术开发计划项目（20195215）；广西科技计划项目（桂科AB18221126）；广西大学“大学生创新创业训练计划”（201810593047）。
Author NameAffiliationPostcode
QI Minghui* College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Key Laboratory of Clean Pulp and Paper and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
YI Tan College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Key Laboratory of Clean Pulp and Paper and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
MO Qi College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
DENG Jingchun College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
ZHANG Jinlan College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
HUANG Lijie College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Key Laboratory of Clean Pulp and Paper and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
HUANG Chongxing College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
LIU Yang College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
ZHAO Hui College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004 530004
WANG Shuangfei College of Light Industry and Food Engineering， Guangxi University， Nanning， Guangxi Zhuang Autonomous Region， 530004
Key Laboratory of Clean Pulp and Paper and Pollution Control， Nanning， Guangxi Zhuang Autonomous Region， 530004 		530004
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Abstract:
      Nanocellulose of wheat straw was prepared in layers by means of acidolysis assisted high pressure homogenization. Subsequently， the layered wheat straw nanocellulose was characterized by Marvin nano-particle analyzer， transmission electron microscope， atomic force microscope， infrared spectrum， X-ray diffractometer and thermal stability analyzer. The nanocellulose prepared from the supernatant was the nanocellulose whisker， and the crystallinity increased from 48.61% of the wheat straw materials to 71.87%. The residual fiber solids of wheat straw after cellulose acidolysis were homogenized for 8 times under the condition of 150 MPa to obtain nanocellulose. The resulted particle size distribution was 100~200 nm， the diameter was about 15 nm， and the same nanocellulose whiskers with high crystallinity （Iβ） were obtained. The thermal stability of both nanocellulose wiskers decreased compared with the raw materials. The yield of nanocellulose prepared by this method was higher than that by the method of complete sulfuric acid hydrolysis， and the number of homogenization times was obviously reduced compared with that of complete mechanical homogenization.
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