CN1473656A - 一种使多壁纳米碳管端部开口的方法 - Google Patents
一种使多壁纳米碳管端部开口的方法 Download PDFInfo
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- CN1473656A CN1473656A CNA03129684XA CN03129684A CN1473656A CN 1473656 A CN1473656 A CN 1473656A CN A03129684X A CNA03129684X A CN A03129684XA CN 03129684 A CN03129684 A CN 03129684A CN 1473656 A CN1473656 A CN 1473656A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 229910021392 nanocarbon Inorganic materials 0.000 title 1
- 238000000498 ball milling Methods 0.000 claims abstract description 30
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 18
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 18
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 6
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003701 mechanical milling Methods 0.000 claims description 3
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- 239000011261 inert gas Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000011805 ball Substances 0.000 abstract 9
- 238000003801 milling Methods 0.000 abstract 6
- 239000002048 multi walled nanotube Substances 0.000 abstract 2
- 238000002441 X-ray diffraction Methods 0.000 abstract 1
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- 238000004458 analytical method Methods 0.000 description 1
- 238000001241 arc-discharge method Methods 0.000 description 1
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Abstract
本发明公开的使多壁纳米碳管端部开口采用的是球磨法,以氧化镁为球磨剂,外径20mm的钢球为大磨球,10mm的钢球为小磨球,按大磨球数目∶小磨球数目∶氧化镁质量(克)∶纳米碳管质量(克)=1~4∶10~26∶2~8∶0.5~2.5的比例,将大磨球、小磨球、氧化镁、纳米碳管放入球磨罐,抽真空两次,每次抽完真空往球磨罐里通入保护气体,然后进行球磨,球磨的转速为100~400转/分,球磨时间为4~48小时。本发明使用球磨对多壁纳米碳管进行改性,操作简单,重复性好,球磨的多壁纳米碳管绝大部分开口,XRD的数据表明,碳管的结构没有受到破坏。
Description
技术领域
本发明涉及使多壁纳米碳管端部开口的方法。
背景技术
纳米碳管由于其优良的电学、力学和热学性能,在储氢、场发射、吸波、电极材料、通用高分子材料等很多领域都具有很好的应用前景,由于纳米碳管是不亲水的,要想让纳米碳管与其他材料如高分子聚合物和其他大分子进行复合,对纳米碳管进行改性是必需的,特别是在碳管的两端甚至侧壁连上有机基团,是目前研究的热点。但纳米碳管由于其采用电弧放电法,激光蒸发法和化学气相沉积法特殊的生长方式,其管端并不具有用于连接有机基团的开口。
发明内容
本发明的目的是提供使多壁纳米碳管端部开口的方法,为多壁纳米碳管的端部或侧壁连上有机基团提供方便。
本发明的使多壁纳米碳管端部开口采用的是球磨法,以氧化镁为球磨剂,外径20mm的钢球为大磨球,10mm的钢球为小磨球,按大磨球数目∶小磨球数目∶氧化镁质量(克)∶纳米碳管质量(克)=1~4∶10~26∶2~8∶0.5~2.5的比例,将大磨球、小磨球、氧化镁、纳米碳管放入球磨罐,抽真空两次,每次抽完真空往球磨罐里通入保护气体,然后进行球磨,球磨的转速为100~400转/分,球磨时间为4~48小时。一般需长时间球磨时,在球磨过程中,每隔2~3个小时停1小时。
本发明,最佳的配比是大磨球数目∶小磨球数目∶氧化镁质量(克)∶纳米碳管质量(克)=2~4∶15~24∶3~5∶0.8~1.5。优选的球磨转速为150~300转/分,球磨时间为8~24小时。上述的保护气体是氮气或氩气、氦气惰性气体。
本发明使用球磨对多壁纳米碳管进行改性,操作简单,重复性好,球磨的多壁纳米碳管绝大部分开口,XRD的数据表明,碳管的结构没有受到破坏。
附图说明
图1是球磨后纳米碳管的透射电子显微(TEM)照片;
图2是磨完前后纳米碳管的XRD实验结果。
具体实施方式
实施例以化学气相沉积法制备的直径为10nm~25nm,纯度在80%以上的普通多壁纳米碳管为例。
实施例1:
按比例取大磨球4个,小磨球24个,球磨剂氧化镁5克,纳米碳管1.0克,放入球磨罐里,抽真空一次10分钟,然后往球磨罐里冲入氦气,再抽真空一次5分钟,往球磨罐里冲入氦气,即可进行球磨。球磨速率为250转/分,球磨时间为10小时。样品取出用透射电镜观察,发现有大量的纳米碳管开口,主要是一端开口。XRD衍射实验表明,纳米碳管的结构没有遭到破坏。图1是球磨后纳米碳管的透射电子显微分析(TEM)照片。
实施例2:
按比例取大磨球4个,小磨球24个,球磨剂氧化镁3克,纳米碳管1.0克,放入球磨罐里,抽真空一次10分钟,然后往球磨罐里冲入氦气,再抽真空一次5分钟,再往球磨罐里冲入氦气,即可进行球磨。球磨速率为250转/分,球磨时间为20小时,在球磨过程中,每隔2小时停1小时。样品取出用透射电镜观察,发现有大量的纳米碳管开口(主要是两端开口)。XRD衍射实验表明,纳米碳管的结构没有遭到破坏。图2显示了磨完前后纳米碳管的XRD实验结果。
实验表明,通常球磨时间在16小时以上时,纳米碳管主要以两端开口居多。
Claims (6)
1.一种使多壁纳米碳管端部开口的方法,其特征是以氧化镁为球磨剂,外径20mm的钢球为大磨球,10mm的钢球为小磨球,按大磨球数目∶小磨球数目∶氧化镁质量(克)∶纳米碳管质量(克)=1~4∶10~26∶2~8∶0.5~2.5的比例,将大磨球、小磨球、氧化镁、纳米碳管放入球磨罐,抽真空两次,每次抽完真空往球磨罐里通入保护气体,然后进行球磨,球磨的转速为100~400转/分,球磨时间为4~48小时。
2.根据权利要求1所述的使多壁纳米碳管端部开口的方法,其特征是大磨球数目∶小磨球数目∶氧化镁质量(克)∶纳米碳管质量(克)=2~4∶15~24∶3~5∶0.8~1.5。
3.根据权利要求1所述的使多壁纳米碳管端部开口的方法,其特征在于所说的保护气体是氮气或氩气、氦气惰性气体。
4.根据权利要求1所述的使多壁纳米碳管端部开口的方法,其特征是球磨的转速为150~300转/分。
5.根据权利要求1所述的使多壁纳米碳管端部开口的方法,其特征是球磨的时间为8~24小时。
6.根据权利要求1所述的使多壁纳米碳管端部开口的方法,其特征是在球磨过程中,每隔2~3个小时停1小时。
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Cited By (1)
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CN103930603A (zh) * | 2011-09-06 | 2014-07-16 | 西南纳米技术公司 | 单壁碳纳米管的纯化方法和改进的单壁碳纳米管 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103930603A (zh) * | 2011-09-06 | 2014-07-16 | 西南纳米技术公司 | 单壁碳纳米管的纯化方法和改进的单壁碳纳米管 |
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