Wenxi Lai, Weihua Yang, Shaoan Lei, Li Yu, Quanhong Tao, Jian Wei*, Xixin Yue and Yimin Hu*,
{"title":"Enhanced Holocellulose Extraction from Corn Straw via Gemini Imidazole Compounds in Ethylene Glycol","authors":"Wenxi Lai, Weihua Yang, Shaoan Lei, Li Yu, Quanhong Tao, Jian Wei*, Xixin Yue and Yimin Hu*, ","doi":"10.1021/acssusresmgt.4c00528","DOIUrl":null,"url":null,"abstract":"<p >Holocellulose, a key biomass material, holds broad potential in the energy, materials, and chemical industries. Here, we developed a novel method for its extraction by selectively removing lignin using Gemini imidazole salts and surfactants [C<sub><i>n</i></sub>-m-C<sub><i>n</i></sub>im]Br<sub>2</sub> (<i>m</i> = 1, 2, 4, 6; <i>n</i> = 1, 2, 4, 8, 12, 14, 16) in ethylene glycol (EG). Key factors, such as reagent concentration, alkyl/spacer chain length, pretreatment time/temperature, solid–liquid ratio, and straw particle size, were optimized. Under optimal conditions ([C<sub>1</sub>-2-C<sub>1</sub>im]Br<sub>2</sub>/EG, 100 °C, 3 h), cellulose and hemicellulose retention reached 94.2 and 88.4%, respectively, with 73.1% lignin removal. The pretreatment solution remained effective for five reuse cycles. FT-IR, <sup>13</sup>CNMR, TG, XRD, and SEM analyses confirmed the holocellulose’s composition and morphology, and the delignification mechanism was elucidated.</p>","PeriodicalId":100015,"journal":{"name":"ACS Sustainable Resource Management","volume":"2 7","pages":"1195–1203"},"PeriodicalIF":0.0000,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Sustainable Resource Management","FirstCategoryId":"1085","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acssusresmgt.4c00528","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Holocellulose, a key biomass material, holds broad potential in the energy, materials, and chemical industries. Here, we developed a novel method for its extraction by selectively removing lignin using Gemini imidazole salts and surfactants [Cn-m-Cnim]Br2 (m = 1, 2, 4, 6; n = 1, 2, 4, 8, 12, 14, 16) in ethylene glycol (EG). Key factors, such as reagent concentration, alkyl/spacer chain length, pretreatment time/temperature, solid–liquid ratio, and straw particle size, were optimized. Under optimal conditions ([C1-2-C1im]Br2/EG, 100 °C, 3 h), cellulose and hemicellulose retention reached 94.2 and 88.4%, respectively, with 73.1% lignin removal. The pretreatment solution remained effective for five reuse cycles. FT-IR, 13CNMR, TG, XRD, and SEM analyses confirmed the holocellulose’s composition and morphology, and the delignification mechanism was elucidated.
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