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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Bio-renewable precursor fibers from lignin/polylactide blends for conversion tc carbon fibers
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Bio-renewable precursor fibers from lignin/polylactide blends for conversion tc carbon fibers

机译：木质素/聚丙交酯共混物可生物再生的前体纤维，用于转化碳纤维

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摘要

Lignin, a highly aromatic biopolymer extracted as a coproduct of wood pulping, was investigated as a suitable precursor for carbon fibers. Lignin was chemically modified and blended with poly(lactic acid) (PLA) biopolymer before melt spinning into lignin fibers. The chemical modification of raw lignin involved butyration to form ester functional groups in place of polar hydroxyl (-OH) groups, which enhanced the miscibility of lignin with PLA. Fine fibers were extracted and spooled continuously from lignin/PLA blends with an overall lignin concentration of 75 wt.%. The influence of chemical modification and physical blending of lignin with PLA on the resulting fiber was studied by analyzing the microstructure of the fibers using transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The influence of blend composition on the phase behavior was studied by differential scanning calorimetry (DSC). The effect of composition on the mechanical properties was studied by tensile tests of the lignin/PLA blend fibers. The thermal stability and carbon yield of the blended fibers with different concentrations of lignin were characterized by thermogravimetric analysis (TGA). The microstructure analysis of carbon fibers produced from lignin/PLA blends revealed composition dependent micropo-rous structures inside the fine fibers.
机译：木质素是一种高度芳香的生物聚合物，被提取为木浆的副产品，被用作碳纤维的合适前体。对木质素进行化学修饰，然后将其与聚乳酸（PLA）生物聚合物共混，然后熔融纺丝成木质素纤维。原始木质素的化学修饰涉及丁酸酯化，以形成酯官能团代替极性羟基（-OH），从而增强了木质素与PLA的混溶性。从木质素/ PLA共混物中提取细纤维并连续卷绕，其总木质素浓度为75重量％。通过使用透射电子显微镜（TEM）和扫描电子显微镜（SEM）分析纤维的微观结构，研究了木质素与PLA的化学改性和物理共混对所得纤维的影响。通过差示扫描量热法（DSC）研究了共混物组成对相行为的影响。通过木质素/ PLA共混纤维的拉伸试验研究了组成对机械性能的影响。通过热重分析（TGA）表征了具有不同浓度的木质素的共混纤维的热稳定性和碳产率。由木质素/ PLA共混物生产的碳纤维的微结构分析表明，细纤维内部的组成依赖于微孔结构。

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