Abstract In this work, lignin-based nanofibers were produced from corn stalk lignin (CSL)/lignin-derived bio-oil (LBO) and polyacrylonitrile (PAN) co-polymers via electrospinning. During depolymerization, the addition of phosphotungstic acid (PTA) promoted the CSL catalytic conversion to some extent, the decrease of β-O-4 aryl ether bond, molecular weight (Mw) and polydispersity (PDI) was obvious. Compared with CSL, LBO can promotes the formation of uniform and smooth lignin-based nanofibers under high replacement rates condition and maintaining good morphology. Subsequent reactions between LBO and PAN fragments formed a better-integrated co-polymers structure containing linear PAN backbone. The Td of LBO-g-PAN was improved to 153 °C and the Tg was decreased to 96.5 °C. Rheological conclusions displayed that the viscosity of PAN/LBO/DMF was 0.082 Pa s, illustrating the polymer substance could be continuously spun into filament without causing degradation of the polymer substance. LBO-g-PAN also had high thermal stability, yielding of residual mass was 56.32 wt% at 700 °C.

中文翻译：

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从木质素衍生的生物油到木质素-g-聚丙烯腈纳米纤维：高木质素取代率并保持良好的纳米纤维形态

摘要 在这项工作中，以玉米秸秆木质素 (CSL)/木质素衍生生物油 (LBO) 和聚丙烯腈 (PAN) 共聚物为原料，通过静电纺丝制备了木质素基纳米纤维。解聚过程中，磷钨酸(PTA)的加入在一定程度上促进了CSL催化转化，β-O-4芳醚键、分子量(Mw)和多分散性(PDI)降低明显。与CSL相比，LBO可以在高置换率条件下促进均匀光滑的木质素基纳米纤维的形成并保持良好的形态。LBO 和 PAN 片段之间的后续反应形成了包含线性 PAN 骨架的更好整合的共聚物结构。LBO-g-PAN 的 Td 提高到 153 °C，Tg 降低到 96.5 °C。流变学结论表明PAN/LBO/DMF的粘度为0。082 Pa s，说明高分子物质可以连续纺成长丝，而不会引起高分子物质的降解。LBO-g-PAN 还具有较高的热稳定性，在 700 °C 下残余质量的产率为 56.32 wt%。