Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse
The present study aimed to optimize the process for extracting cellulose nanocrystals (CNCs) from sugarcane bagasse through ultrasonic-assisted sulfuric acid hydrolysis and its subsequent modification with L-malic acid and silane coupling agent KH-550. The effects of the different modification metho...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/28/14/5444 |
| _version_ | 1797588039409598464 |
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| author | Sen Tang Zhipeng Chen Feifan Chen Xuanren Lai Qiaoyan Wei Xianling Chen Caiyun Jiang |
| author_facet | Sen Tang Zhipeng Chen Feifan Chen Xuanren Lai Qiaoyan Wei Xianling Chen Caiyun Jiang |
| author_sort | Sen Tang |
| collection | DOAJ |
| description | The present study aimed to optimize the process for extracting cellulose nanocrystals (CNCs) from sugarcane bagasse through ultrasonic-assisted sulfuric acid hydrolysis and its subsequent modification with L-malic acid and silane coupling agent KH-550. The effects of the different modification methods and the order of modification on the structures and properties of bagasse CNCs were explored. The results indicated that the optimal process conditions were achieved at an acid-digestion temperature of 50 °C, a reaction time of 70 min, an ultrasonic power of 250 W, and a volume fraction of 55%. The modified CNCs were analyzed using infrared spectral, X-ray diffraction, and thermogravimetric techniques, which revealed that L-malic acid was attached to the hydroxyl group on the CNCs via ester bond formations, and the silane coupling agent KH-550 was adsorbed effectively on the CNCs’ surfaces. Moreover, it was observed that the modification of the CNCs by L-malic acid and the KH-550 silane coupling agent occurred only on the surface, and the esterification–crosslinking modification method provided the best thermal stability. The performance of self-made CNC was found to be superior to that of purchased CNC based on the transmission electron microscopy analysis. Furthermore, the modified esterified-crosslinked CNCs exhibited the best structure and performance, thereby offering a potential avenue for the high-value utilization of sugarcane bagasse, a byproduct of sugarcane sugar production, and the expansion of the comprehensive utilization of sugarcane bagasse. |
| first_indexed | 2024-03-11T00:47:16Z |
| format | Article |
| id | doaj.art-ce767907638642ddb89fc37af7c490df |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-11T00:47:16Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-ce767907638642ddb89fc37af7c490df2023-11-18T20:42:12ZengMDPI AGMolecules1420-30492023-07-012814544410.3390/molecules28145444Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane BagasseSen Tang0Zhipeng Chen1Feifan Chen2Xuanren Lai3Qiaoyan Wei4Xianling Chen5Caiyun Jiang6School of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaSchool of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaSchool of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaSchool of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaSchool of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaSchool of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaSchool of Food and Biochemical Engineering, Guangxi Science & Technology Normal University, Laibin 546199, ChinaThe present study aimed to optimize the process for extracting cellulose nanocrystals (CNCs) from sugarcane bagasse through ultrasonic-assisted sulfuric acid hydrolysis and its subsequent modification with L-malic acid and silane coupling agent KH-550. The effects of the different modification methods and the order of modification on the structures and properties of bagasse CNCs were explored. The results indicated that the optimal process conditions were achieved at an acid-digestion temperature of 50 °C, a reaction time of 70 min, an ultrasonic power of 250 W, and a volume fraction of 55%. The modified CNCs were analyzed using infrared spectral, X-ray diffraction, and thermogravimetric techniques, which revealed that L-malic acid was attached to the hydroxyl group on the CNCs via ester bond formations, and the silane coupling agent KH-550 was adsorbed effectively on the CNCs’ surfaces. Moreover, it was observed that the modification of the CNCs by L-malic acid and the KH-550 silane coupling agent occurred only on the surface, and the esterification–crosslinking modification method provided the best thermal stability. The performance of self-made CNC was found to be superior to that of purchased CNC based on the transmission electron microscopy analysis. Furthermore, the modified esterified-crosslinked CNCs exhibited the best structure and performance, thereby offering a potential avenue for the high-value utilization of sugarcane bagasse, a byproduct of sugarcane sugar production, and the expansion of the comprehensive utilization of sugarcane bagasse.https://www.mdpi.com/1420-3049/28/14/5444sugarcane bagassecellulose nanocrystalspreparation processsurface modification |
| spellingShingle | Sen Tang Zhipeng Chen Feifan Chen Xuanren Lai Qiaoyan Wei Xianling Chen Caiyun Jiang Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse Molecules sugarcane bagasse cellulose nanocrystals preparation process surface modification |
| title | Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse |
| title_full | Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse |
| title_fullStr | Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse |
| title_full_unstemmed | Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse |
| title_short | Extraction and Surface Functionalization of Cellulose Nanocrystals from Sugarcane Bagasse |
| title_sort | extraction and surface functionalization of cellulose nanocrystals from sugarcane bagasse |
| topic | sugarcane bagasse cellulose nanocrystals preparation process surface modification |
| url | https://www.mdpi.com/1420-3049/28/14/5444 |
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