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| Preparation of Highly Substituted Starch Benzoate by Dry Pretreatment Combined with Esterification and Its Property Control |
| Received:March 19, 2025 Revised:April 28, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.09.014 |
| Key Words:dry pretreatment starch benzoate hydrophobicity thermoplasticity solubility |
| Fund Project:国家自然科学基金资助项目（21766004）；广西高校中青年教师科研基础能力提升项目（2023KY0175）；广西民族大学科研基金资助项目（引进人才科研启动项目，2024KJQD06）；广西民族大学研究生教育创新计划项目（gxmzu-chxs2024227）。 |
| Author Name | Affiliation | Postcode | | LI Jun | College of Chemistry and Chemical Engineering, Guangxi Key Lab of Polysaccharide Materials and Modification, Guangxi University for Nationalities, Nanning, Guangxi Zhuang Autonomous Region, 530006 | 530006 | | LI Zhicong | College of Chemistry and Chemical Engineering, Guangxi Key Lab of Polysaccharide Materials and Modification, Guangxi University for Nationalities, Nanning, Guangxi Zhuang Autonomous Region, 530006 | 530006 | | CHEN Zhenting | College of Chemistry and Chemical Engineering, Guangxi Key Lab of Polysaccharide Materials and Modification, Guangxi University for Nationalities, Nanning, Guangxi Zhuang Autonomous Region, 530006 | 530006 | | SHAO Danrong | College of Chemistry and Chemical Engineering, Guangxi Key Lab of Polysaccharide Materials and Modification, Guangxi University for Nationalities, Nanning, Guangxi Zhuang Autonomous Region, 530006 | 530006 | | YAO Xianchao* | College of Chemistry and Chemical Engineering, Guangxi Key Lab of Polysaccharide Materials and Modification, Guangxi University for Nationalities, Nanning, Guangxi Zhuang Autonomous Region, 530006 | 530006 | | LIN Rihui* | College of Chemistry and Chemical Engineering, Guangxi Key Lab of Polysaccharide Materials and Modification, Guangxi University for Nationalities, Nanning, Guangxi Zhuang Autonomous Region, 530006 | 530006 |
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| Abstract:Using cassava starch as raw starch， the starch was activated via dry pretreatment， followed by an esterification reaction with benzoyl chloride at a molar ratio of 1∶3 at 60 ℃ for 3 h. The results showed that pretreatment effectively disrupted the dense crystalline structure of starch and increased reactive sites. The esterified product (BC-ST3) exhibited a morphological transformation from spherical granules to irregular fragments， and its crystalline structure shifted from type A to type V. The product yield (86.68%) and degree of substitution (DS = 1.036) of BC-ST3 were approximately 1.5 and 1.7 times higher， respectively， than those of the non-pretreated sample (BC-ST)， with an esterifying agent utilization rate of 34.5%. Additionally， BC-ST3 displayed excellent hydrophobicity， thermoplasticity， and solubility， showcasing potential applications in biomaterials， biodegradable packaging， and composite materials. |
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