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| Preparation and Properties of Sugarcane Bagasse Cellulose Nanocrystal by Organic Acid Hydrolysis |
| Received:February 17, 2025 Revised:March 06, 2025 |
| DOI：10.11981/j.issn.1000-6842.2026.01.08 |
| Key Words:sugarcane bagasse;pretreatment;organic acid;cellulose nanocrystal;chiral nematic liquid crystal |
| Fund Project:国家自然科学基金（22208057）；中央引导地方科技发展资金项目（2024L3001）。 |
| Author Name | Affiliation | Postcode | | WANG Qiong* | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | WU Xiaoliang | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | JI Siyi | 2School of Chemical and Environmental Engineering， China University of Mining and Technology-Beijing， Beijing， 100083 | 100083 | | LYU Yuancai | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | YE Xiaoxia | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | LIU Yifan | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | LIN Chunxiang* | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108 | 350108 | | LIU Minghua* | 1College of Environment and Safety Engineering， Fuzhou University， Fuzhou， Fujian Province， 350108
3Putian University， Putian， Fujian Province， 351100 | 351100 |
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| Abstract: |
| This study utilized sugarcane bagasse as raw material， employed a pretreatment method combining p-toluenesulfonic acid-alkali-bleach to obtain sugarcane bagasse cellulose (TSA-SCB). Subsequently， oxalic acid hydrolysis was applied to produce sugarcane bagasse cellulose nanocrystal (SCB-CNC). The optimum preparation conditions of both TSA-SCB and SCB-CNC were investigated. The results showed that lignin and hemicellulose from SCB were efficiently removed， and the prepared TSA-SCB had a high purity， when the p-toluenesulfonic acid solution concentration was 65%， reaction temperature was 80 ℃， and reaction time was 20 min. Under the conditions of oxalic acid solution concentration of 90%， hydrolysis temperature of 110 ℃， and hydrolysis time of 3 h， SCB-CNC had a yield of 29.8% with the Zeta potential of -32.65 mV and excellent stability of suspension. The physicochemical properties of SCB-CNC were characterized， the results indicated that SCB-CNC exhibited rod-shaped with an average length and average width of about 468 and 39 nm， respectively， and it was successfully introduced carboxyl groups onto surface of SCB-CNC while retaining the crystalline structure of cellulose type I. Furthermore， SCB-CNC suspensions could self-assemble into a chiral nematic liquid crystal phase at a certain concentration. |
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