Carbon fibers prepared from Lyocell/CNT composite fibers pretreated with phosphorous and nitrogen containing catalysts，ICAFPM 2011先进纤维与聚合物材料国际学术会议（2011.8.15~17，上海）-中国聚合物网,论文下载 -亚博体育

Carbon fibers prepared from Lyocell/CNT composite fibers pretreated with phosphorous and nitrogen containing catalysts

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Lyocell/CNT composite fiber catalyst carbonization tensile strength

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1549K

所属学科：

分子表征

来源：

ICAFPM 2011先进纤维与聚合物材料国际学术会议（2011.8.15~17，上海）

简介：

Lyocell/CNTcompositefiberswerepretreatedwithvariouscatalystsinordertopreparecarbonfibers.Thesecatalystsincludedphosphoricacid(PA),urea(U),mixtureofphosphoricacidandurea(PA/U)withdifferentmoleratios,ammoniumdihydrogenphosphate(ADP)anddiammoniumhydrogenphosphate(DHP).Thecarbonfiberswereobtainedfromthosepretreatedfibersbyheattreatingat110℃,150℃,200℃and250℃successivelyandcarbonizingat1000℃.Thepyrolysisbehaviorofthosepretreatedfiberswasinvestigatedbythermogravimetry(TG)analysis.Theresultsindicatedthatthepyrolysisofthepretreatedfibersstartedatalowertemperatureandthecharyieldsincreaseddramatically.Themechanicalpropertiesoftheuntreated,heattreatedandcarbonizedfibersweremeasuredrespectively.Itwasconcludedthatthediameterofthefibersdecreasedastheheattreatmenttemperaturegraduallyrose.Thetensilestrengthandelongationatbreakfirstlydecreasedandthenincreasedduringheattreatmentandcarbonization.Comparedwithothercatalysts,PA/Uwasthemostappropriateonewithanoptimalmoleratio(P:N)ofabout2:1,andthecarbonfibersproducedwiththiscatalystpossessedagreatertensilestrength.

作者：

DU Zange, XU Dong, CHEN Huifang

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2011-10-08 13:58:11

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