纤维素-木质素复合纤维作为碳纤维的前体。第 1 部分-前体纤维的制造和性能。
Cellulose-lignin composite fibres as precursors for carbon fibres. Part 1 - Manufacturing and properties of precursor fibres.
机构信息
Aalto University, School of Chemical Engineering, Department of Bioproducts and Biosystems, P.O. Box 16300, 00076, Aalto, Finland.
Institute for Frontier Materials, Deakin University, Geelong, Vic, 3217, Australia.
出版信息
Carbohydr Polym. 2021 Jan 15;252:117133. doi: 10.1016/j.carbpol.2020.117133. Epub 2020 Sep 28.
Cellulose-lignin composite fibres were spun from ionic liquid (IL) solutions by dry-jet wet spinning. Birch pre-hydrolysed Kraft (PHK) pulp and organosolv beech (BL) or spruce lignin (SL) were dissolved in the IL 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) to prepare spinning dopes. Fibres with lignin concentrations of up to 50 % were spun successfully. The fibres were analysed focusing on important properties for the production of carbon fibres (CF). Due to the higher molar mass of the SL compared to the BL, SL showed higher stability in the spinning process, giving higher lignin content in the final fibres. The CF yield after carbonization increased with increasing lignin content. The higher carbon content of SL compared to BL, resulted in moderately higher CF yield of the SL fibres, compared to fibres with BL. Overall, the produced cellulose-lignin composite fibres show great potential as precursors for CF production.
纤维素-木质素复合纤维由离子液体（IL）溶液通过干喷湿法纺丝制成。桦木预水解硫酸盐浆（PHK）和有机溶剂法制得的山毛榉木（BL）或云杉木木质素（SL）溶解在 IL 1,5-二氮杂二环[4.3.0]壬-5-烯鎓乙酸盐([DBNH]OAc)中，以制备纺丝用纺丝液。成功地纺制了木质素浓度高达 50%的纤维。对纤维进行了分析，重点关注了对碳纤维（CF）生产重要的性能。由于 SL 的摩尔质量高于 BL，因此在纺丝过程中 SL 更稳定，最终纤维中的木质素含量更高。碳化后 CF 的收率随木质素含量的增加而增加。与 BL 纤维相比，由于 SL 的碳含量高于 BL，因此 SL 纤维的 CF 收率略高。总的来说，所制备的纤维素-木质素复合纤维作为 CF 生产的前体具有很大的潜力。
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