木质素结构对聚丙烯腈/磨木木质素基碳纤维机械性能的影响研究  

Effect of Lignin Structure on Mechanical Properties of PAN/MWL-Based Carbon Fibers

作　　者：王朝阳 钟建雄 周梓鑫 窦彩霞 张然 陈飞飞[1] WANG Chaoyang;ZHONG Jianxiong;ZHOU Zixin;DOU Caixia;ZHANG Ran;CHEN Feifei(Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&Finishing,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]武汉纺织大学生物质纤维与生态染整湖北省重点实验室,湖北武汉430200

出　　处：《化学与生物工程》2024年第10期44-49,63,共7页Chemistry & Bioengineering

基　　金：国家自然科学基金青年科学基金项目(21902053)。

摘　　要：从3种典型生物质原料(银杏、麦草、杨木)中提取了3种不同结构的磨木木质素(MWL),利用核磁共振仪对MWL的连键及官能团进行定性及半定量分析;将不同MWL与PAN共混,通过静电纺丝技术制备PAN/MWL基碳纤维,通过SEM、XRD对其表面形貌和结晶度进行表征,并通过拉伸实验测试其机械性能。结果表明,MWL的加入能显著增强碳纤维的机械性能,相比于PAN基碳纤维[拉伸强度为(76±10)MPa],PAN/银杏MWL基碳纤维的拉伸强度可达(134±12)MPa。In this paper,we extracted 3 milled wood lignin(MWL)with different structures from 3 typical biomass materials(ginkgo,wheat straw,and poplar),and conducted qualitative and semi-quantitative analyses on the bonds and functional groups of MWL by using nuclear magnetic resonance instrument.Moreover,through mixing different MWL with polyacrylonitrile(PAN),we prepared PAN/MWL-based carbon fibers by electrospinning technology,characterized their surface morphologies and crystallinity by SEM and XRD,and tested their mechanical properties by tensile test.The results show that the addition of MWL significantly enhance the mechanical properties of carbon fiber.Compared with PAN-based carbon fiber with the tensile strength of(76±10)MPa,the tensile strength of PAN/ginkgo MWL-based carbon fiber can reach up to(134±12)MPa.

关 键 词：磨木木质素 碳纤维 聚丙烯腈 机械性能 静电纺丝 

分 类 号：TQ352[化学工程]