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| Study on the Effect of Different Blending Proportions of Kraft Lignin/Lignin Sulfonate on the Preparation of Carbon Fibers |
| Received:January 24, 2025 Revised:February 21, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.08.004 |
| Key Words:kraft lignin lignin sulfonate carbon fiber electrospinning carbonization |
| Fund Project:云南省基础应用研究项目（202201BE070001-039），（202401BE070001-011）；云南省教育厅可降解塑料工程研究中心（KKPU202205001）。 |
| Author Name | Affiliation | Postcode | | WANG Jie* | School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000 | 650000 | | SHI Changrong | School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 | | KIM Yongsik | Kangwon National University, Chuncheon, Korea, 24341 | 24341 | | AN Liangliang* | School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 | | LIU Yuxin* | School of Chemical Engineering, Kunming University of Science and Technology, Kunming, Yunnan Province, 650000
Degradable Plastics Engineering Research Center of Yunnan Provincial Education Department, Kunming, Yunnan Province, 650000 | 650000 |
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| Abstract:Effects of adding different amounts of lignin sulfonate （LS） on the morphology， yield and structure of cross-linked kraft lignin （CKL） precursor fibers and carbon fibers were investigated. The results showed that CKL with the mass fraction of 28% had good fiber-forming properties during electrospinning， and the prepared precursor fibers had uniform morphology； while the addition of LS reduced the solution viscosity and produced insoluble particles， resulting in nodules or particles on the fiber surface. During the thermal oxidation process， the higher the LS content， the greater the weight loss of the precursor fiber； at the same time， in the carbonization process， the carbonization temperature needed to be lowered to control the weight loss and avoid fiber breakage. The addition of LS affected the formation of the carbon layer and the degree of graphitization to a certain extent. Adding 10% LS could obtain carbon fibers with a high degree of graphitization and a dendritic fiber morphology， and was rich in 2.71% S element. |
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