MWNTs改性Lyocell基碳纤维的结构及性能研究
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摘要
以纤维素浆粕为原料,添加多壁碳纳米管(MWNTs)制备纤维素质量分数为10%的纺丝原液,经干喷湿法纺丝制得MWNTs改性Lyocell纤维原丝,再经多段预氧化、高温碳化处理制备了MWNTs改性Lyocell基碳纤维,研究了所得碳纤维的结构和性能。结果表明:MWNTs改性Lyocell基碳纤维的表面比较光洁,没有明显的孔洞缺陷,MWNTs在碳纤维中的分散情况与其添加量有密切的关系;与纯Lyocell基碳纤维相比,MWNTs改性Lyocell基碳纤维的力学性能明显提高,含质量分数1%MWNTs的改性碳纤维的强度和模量分别提高了70%和116%;添加MWNTs质量分数1%的Lyocell纤维更适合作为碳纤维原丝,所得碳纤维形态结构完善、力学性能好。
A spinning solution containing 10% cellulose by mass fraction was prepared by using cellulose pulp as raw material and adding multi-walled carbon nanotubes( MWNTs) and was spun into MWNTs modified Lyocell precursor via dry-jet wet spinning process,which was produced into MWNTs modified Lyocell-based carbon fiber after multi-stage pre-oxidation and high-temperature carbonization. The structure and properties of the obtained carbon fiber were studied. The results showed that the MWNTs modified Lyocell-based carbon fiber had a smooth surface with no obvious porous flaws; the dispersion of MWNTs in carbon fiber was closely related to the MWNTs amount; as compared with pure Lyocell-based carbon fiber,the mechanical properties of MWNTs modified Lyocell-based carbon fiber were profoundly improved,and the strength and modulus of the modified carbon fiber containing 1% MWNTs by mass fraction were increased by 70% and 116%; and the modified Lyocell precursor containing1% MWNTs by mass fraction was more suitable for carbon fiber as a precursor,and the obtained carbon fiber had a perfect morphology and good mechanical properties.
A spinning solution containing 10% cellulose by mass fraction was prepared by using cellulose pulp as raw material and adding multi-walled carbon nanotubes( MWNTs) and was spun into MWNTs modified Lyocell precursor via dry-jet wet spinning process,which was produced into MWNTs modified Lyocell-based carbon fiber after multi-stage pre-oxidation and high-temperature carbonization. The structure and properties of the obtained carbon fiber were studied. The results showed that the MWNTs modified Lyocell-based carbon fiber had a smooth surface with no obvious porous flaws; the dispersion of MWNTs in carbon fiber was closely related to the MWNTs amount; as compared with pure Lyocell-based carbon fiber,the mechanical properties of MWNTs modified Lyocell-based carbon fiber were profoundly improved,and the strength and modulus of the modified carbon fiber containing 1% MWNTs by mass fraction were increased by 70% and 116%; and the modified Lyocell precursor containing1% MWNTs by mass fraction was more suitable for carbon fiber as a precursor,and the obtained carbon fiber had a perfect morphology and good mechanical properties.
引文
[1]吴广峰,赵书经.原丝性能对碳纤维强度影响的灰色关联分析[J].纺织高校基础科学学报,1997,10(2):149-152.
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[7]Lu Jiang,Zhang Huzhui,Shao Huili,et al.Preparation and characterization of multiwalled carbon nanotubes/Lyocell composite fibers[J].Polym Korea,2007,31(5):436-441.
[8]吴琪琳,龚静华,张志海,等.催化处理Lyocell纤维在热解过程中的结构与性能变化[J].新型炭材料,2007,22(1):47-52.
[9]葛曷一,柳华实,陈娟.PAN原丝至碳纤维缺陷的形成与遗传性[J].合成纤维,2009,38(2):21-25.
[10]陈宇晗,吴琪琳,潘鼎.补强前后粘胶基炭纤维纤维中的分形[J].炭素,2006(3):34~37.
[11]Chen Yuhan,Wu Qilin,Pan N,et al.Rayon-based activated carbon fibers treated with both alkali metal salt and Lewis acid[J].Microporous Mesoporous Mater,2008,109(1/2/3):138-146.
[12]吴琪琳,潘鼎.不同线密度粘胶原丝及其碳纤维的结果性能对比[J].合成纤维工业,2003,26(5):1-4.
[2]Konkin A A.Production of cellulose based carbon materials[M].Berlin:Elsevier Science Publisher,1985:277.
[3]何春菊,王庆瑞.中国发展Lyocell纤维展望[J].纤维素科学与技术,1999,7(1):59-65.
[4]彭顺金,邵惠丽,胡学超.新型碳纤维用原丝-高强高模Lyocell纤维纺丝工艺研究[J].合成纤维工业,2002,25(6):21-24.
[5]Zhang Huihui,Guo Liwei,Shao Huili,et al.Nano-carbon black filled Lyocell fiber as a precursor for carbon fiber[J].J Appl Polym Sci,2006,99(1):65-74.
[6]Byrne M T,Gun'ko Y K.Recent advances in research on carbon nanotube-polymer composites[J].Adv Mater,2010,22(15):1672-1688.
[7]Lu Jiang,Zhang Huzhui,Shao Huili,et al.Preparation and characterization of multiwalled carbon nanotubes/Lyocell composite fibers[J].Polym Korea,2007,31(5):436-441.
[8]吴琪琳,龚静华,张志海,等.催化处理Lyocell纤维在热解过程中的结构与性能变化[J].新型炭材料,2007,22(1):47-52.
[9]葛曷一,柳华实,陈娟.PAN原丝至碳纤维缺陷的形成与遗传性[J].合成纤维,2009,38(2):21-25.
[10]陈宇晗,吴琪琳,潘鼎.补强前后粘胶基炭纤维纤维中的分形[J].炭素,2006(3):34~37.
[11]Chen Yuhan,Wu Qilin,Pan N,et al.Rayon-based activated carbon fibers treated with both alkali metal salt and Lewis acid[J].Microporous Mesoporous Mater,2008,109(1/2/3):138-146.
[12]吴琪琳,潘鼎.不同线密度粘胶原丝及其碳纤维的结果性能对比[J].合成纤维工业,2003,26(5):1-4.