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Study on Esterification Modification of Dry Pretreated Sugarcane Bagasse Cellulose with Structure and Properties of Products
Received:February 17, 2025  Revised:March 14, 2025
DOI：10.11981/j.issn.1000-6842.2026.01.18
Key Words:dry pretreatment;sugarcane bagasse cellulose;esterification;structural characterization;thermal stability
Fund Project:国家自然科学基金（21766004）；广西自然科学基金（2019GXNSFAA185008）；广西民族大学引进人才科研启动项目（2024KJQD06）；广西高校中青年教师科研基础能力提升项目（2023KY0175）；广西民族大学研究生教育创新计划（gxun-chxs2024108）。
Author NameAffiliationPostcode
LIU Xiaoxia* 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
ZHANG Jian 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006
2Office of Development Planning， Guangxi University of Chinese Medicine， Nanning， Guangxi Zhuang Autonomous Region，530200 		530200
FU Yulu 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
LI Xiangyi 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
ZHANG Hua 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
WEI Xiaoyan 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
LIN Rihui* 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
YAO Xianchao* 1School of Chemistry and Chemical Engineering， Guangxi Key Lab for Polysaccharide Materials and Modification， Guangxi Minzu University， Nanning， Guangxi Zhuang Autonomous Region， 530006 530006
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Abstract:
      In this study， cellulose acetate （SBC-CA， Pre-SBC1-CA， Pre-SBC2-CA） and cellulose benzoate （SBC-CB， Pre-SBC1-CB， Pre-SBC2-CB） were prepared by acetylation （homogeneous） and benzoylation （heterogeneous） reactions， respectively， with sugarcane bagasse cellulose before and after dry pretreatment at different times as raw material. The samples were characterized to investigate the effects of dry pretreatment on esterification activity of sugarcane bagasse cellulose， with their structure and properties. The results showed that dry pretreatment effectively improved the esterification activity of sugarcane bagasse cellulose， and was conducive to the preparation of cellulose acetate and cellulose benzoate with favorable crystalline structure， hydrophobic properties， and thermal stability. Compared with SBC-CA and SBC-CB without dry pretreatment， Pre-SBC2-CA and Pre-SBC2-CB with dry pretreatment for 3 h exhibited the highest esterification efficiency with substitution degrees of 2.82 and 0.76， increased by 20.5% and 46.2%， while yields rose by 1.2 and 1.3 times， the crystallinity index increased by 1.26 and 1.09 times， the water contact angle increased by 74.1% and 20.5%， respectively. Theremore， the temperatures corresponding to the maximum degradation rate of Pre-SBC2-CA and Pre-SBC2-CB reached 380 and 369 °C， with both the initial and complete decomposition temperature increasing simultaneously.
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