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| Preparation of L-CNF from Bamboo Sawdust Pretreated with γ-Valerolactone/Water System |
| Received:August 28, 2024 |
| DOI：10.11980/j.issn.0254-508X.2025.01.001 |
| Key Words:bamboo sawdust γ-valerolactone lignin UV shielding |
| Fund Project:国家自然科学基金项目（31901265，22178208）；衢州市科技计划项目（2022K02）。 |
| Author Name | Affiliation | Postcode | | WANG Xinyu | College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | LUO Qing | College of Bioresources Chemical and Materials Engineering, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021 | 710021 | | LI Yan | Longyou Inspection and Testing Research Institute, Quzhou, Zhejiang Province, 324404 | 324404 | | HUA Feiguo | Zhejiang Jinjiahao Green Nanomaterials Co., Ltd., Quzhou, Zhejiang Province, 324404 | 324404 | | DAI Lei* | Key Lab of Ecological Textile, Ministry of Education, College of Textile Science and Engineering, Jiangnan University, Wuxi, Jiangsu Province, 214122 | 214122 |
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| Abstract:Lignin-containing cellulose nanofibrils （L-CNF） was prepared from waste bamboo sawdust using γ-valerolactone （GVL）/water system pretreatment combined with mild homogenization. The effects of reaction temperature， reaction time， and mass ratio of GVL to water on the physicochemical properties and lignin content of the bamboo sawdust fiber were investigated， and ultimately the preparation conditions were optimized. The results showed that the pretreatment of bamboo sawdust with GVL/water system did not change the structure of fibers， the primary crystalline structure of cellulose was still retained， and the lignin content was reduced. The optimum reaction conditions for the pretreatment of bamboo sawdust with GVL/water system were that reaction temperature of 140 ℃， the reaction time of 10 h， and the mass ratio of GVL to water of 4∶1， under which L-CNF with nano-size （the average particle size of (15.4±4) nm） and high UV shielding performance （UV shielding rate of more than 90% in both the UVA and UVB bands） were obtained. |
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