烷基化木质素/PVA基碳纤维前驱体的制备及其性能  

Preparation and performance of alkylated lignin/PVA-based carbon fiber precursors

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作  者:宋俊[1] 王梦蝶 王林锋 李传盟 SONG Jun;WANG Mengdie;WANG Linfeng;LI Chuanmeng(School of Material Science and Engineering,Tiangong University,Tianjin 300387,China;School of Textile Science and Engineering,Tiangong University,Tianjin300387,China)

机构地区:[1]天津工业大学材料科学与工程学院,天津300387 [2]天津工业大学纺织科学与工程学院,天津300387

出  处:《天津工业大学学报》2025年第1期8-13,25,共7页Journal of Tiangong University

基  金:国家自然科学基金项目(52073213);生物源纤维制造技术国家重点实验室开放课题(SKL202310)。

摘  要:为了制备性能最佳的木质素基碳纤维前驱体,采用1,10-二溴癸烷对硫酸盐木质素(KL)进行烷基化改性,然后将烷基化木质素(KLS)与聚乙烯醇(PVA)以不同比例共混,通过干湿法纺丝技术制备了KLS/PVA复合纤维,并研究了不同配比的纺丝液对复合纤维形貌、力学性能及热稳定性的影响。结果表明:烷基化程度随着1,10-二溴癸烷比例的增加而提高,当KL与1,10-二溴癸烷的质量比为1∶0.2(KLS2)时,KLS分子质量达到9.15×10^(6)g/mol,溶解性相对较好;当KLS2与PVA的比例为7∶3时,KLS2/PVA溶液具有较好的可纺性,所得纤维表面均一光滑,断裂强度达224 MPa,热失重后纤维残碳量达33.18%,为后续制备低成本碳纤维奠定基础。In order to prepare the best performance lignin-based carbon fiber precursor,1,10-dibromodecane was used as an alkylation reagent to react with the sulfated lignin(KL),and then the product of alkylated sulfated lignin(KLS)was blended with poly(vinyl alcohol)(PVA),and the KLS/PVA composite fibers were prepared by dry-wet spinning method.The effects of spinning solution content on the morphology,mechanical properties and thermal stability of the composite fibers were investigated.The results showed that the degree of alkylation increased with the increase of the ratio of 1,10-dibromodecane,and when the mass ratio of KL to 1,10-dibromodecane was 1∶0.2(KLS2),the molecular weight of KLS reached 9.15×10^(6) g/mol,and the solubility was relatively better.When the ratio of KLS2 to PVA was 7∶3,the KLS2/PVA solution had good spinnability,and the fiber had a uniform and smooth surface,with a breaking strength of 224 MPa,and the residual carbon content of the fiber after heat loss of weight reached 33.18%,which laid the foundation for the subsequent preparation of low-cost carbon fibers.

关 键 词:硫酸盐木质素 聚乙烯醇 烷基化改性 干湿法纺丝 碳纤维前驱体 

分 类 号:TQ342.94[化学工程—化纤工业] TS102.43[轻工技术与工程—纺织工程]

 

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