废弃棉短绒生物模板制备纳米SiC纤维的研究  

Study on Preparation of Nano-SiC Fibers by Template Method Based on Waste Cotton Linter

作　　者：薛涛[1] 孟家光[1] 金志浩[2] 

机构地区：[1]西安工程大学纺织与材料学院,西安710048 [2]西安交通大学金属材料强度国家重点实验室,西安710049

出　　处：《材料导报》2013年第24期76-78,91,共4页Materials Reports

基　　金：国家自然科学基金(50572084);陕西省重点实验室专项(12JS044);陕西省自然科学基础研究计划资助项目(2012JQ6011);博士科研启动项目(BS1112);陕西省重点学科专项(陕[2008]169)

摘　　要：摘要以纺织加工过程中废弃的棉短绒为模板，经过溶胶法浸渍形成棉纤维／氧化硅复合体，再经碳化、碳热还原反应制备出SiC纳米纤维和纳米颗粒。XRD显示最终产物的组成相为β-SiC，SEM和TEM分析显示SiC纳米纤维的直径在20-200nm。通过对碳／氧化硅复合体碳热还原生成SiC纳米纤维的各步反应的热力学分析，推论SiC纳米纤维由SiO与CO间的气-气反应生成，并推导出其生长机制属于气一固生长。为重新利用棉短绒、变废为宝提供了新的思路。Waste cotton linters from textile industry were used as templates to be transformed as cotton fiber/ SiO complex after sol impregnation, and then through carbonization, carbon thermal reduction reaction, nano-SiC fi- bers and nano particles were prepared. The composition phase of the final products were displayed by XRD as 13-SIC, and the range of diameter size of nano-SiC fibers was analyzed by SEM and TEM as 20-100 nm. Based on the thermo- dynamic analysis of each step in the thermal reduction on carbon/SiO composite carbon to generate nano-SiC fibers, it can be seen that the nano-SiC fibers were generated by the vapor reaction between SiO and CO, and its growth mecha- nism was vapor-solid. For the reuse of cotton linter, thus conclusion provides a new train of thought.

关 键 词：棉短绒 纳米材料 纺织材料 模板法 溶胶一凝胶法 

分 类 号：TQ343.6[化学工程—化纤工业]