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Carbon nanotubes by electrospinning with a polyelectrolyte and vapor deposition polymerization

机译：聚电解质电纺和气相沉积聚合制备碳纳米管

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摘要

Electrospinning of a polyelectrolyte and vapor deposition polymerization were combined to fabricate nanotubes of oxidatively stabilized poly(acrylonitrile) (PAN Delta) with an outer diameter of 100 nm, a wall thickness of 14 nm, and centimeter-scale length. Poly(styrene sulfonate) sodium (PSSNa) nanofibers serves as sacrificial cores while vapor deposition polymerization was used to form smooth PAN sheaths of even thickness. After the PAN sheaths had been oxidatively stabilized, the PSSNa cores were etched away with water to form nanotubes of PAN Delta. High-temperature carbonization of these nanotubes at 900 degrees C under Ar flow yielded carbon nanotubes with an outer diameter of 80 nm and wall thickness of 10 nm. Raman spectroscopy confirms that the carbon nanotubes were composed of highly disordered graphene sheets, consistent with the carbonization of PAN under similar conditions. These carbon nanotubes have many promising applications as catalyst supports, gas absorbents, and as encapsulants for controlled release of active compounds.
机译：聚电解质的静电纺丝和气相沉积聚合相结合，以制造外径为100 nm，壁厚为14 nm，厘米级长度的氧化稳定化聚丙烯腈（PAN Delta）纳米管。聚（苯乙烯磺酸钠）（PSSNa）纳米纤维用作牺牲芯，而气相沉积聚合用于形成厚度均匀的光滑PAN鞘。将PAN护套氧化稳定后，用水将PSSNa芯蚀刻掉，形成PAN Delta纳米管。这些碳纳米管在Ar流下于900摄氏度高温碳化，得到的碳纳米管的外径为80 nm，壁厚为10 nm。拉曼光谱证实碳纳米管由高度无序的石墨烯片组成，与在相似条件下PAN的碳化一致。这些碳纳米管作为催化剂载体，气体吸收剂和控制活性化合物释放的密封剂具有许多有前途的应用。

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