pH-reversible destabilization-dispersion of MWCNTs coated with functional plasma polymer films in water

被引：6
|
作者：
Jorge, Larissa [1 ]
Girard-Lauriault, Pierre-Luc [1 ]
Coulombe, Sylvain [1 ]
机构：
[1] McGill Univ, Dept Chem Engn, Plasma Proc Lab, Montreal, PQ H3A 0C5, Canada
来源：
PLASMA PROCESSES AND POLYMERS | 2017年 / 14卷 / 11期
基金：
加拿大自然科学与工程研究理事会;
关键词：
MWCNTs; nanofluids; pH; plasma polymerization; MULTIWALLED CARBON NANOTUBES; CONTAINING MONOMERS; THIN-FILMS; NITROGEN; NANOFLUIDS; RICH; NANOCOMPOSITES; AGGREGATION; STABILITY; COATINGS;
D O I：
10.1002/ppap.201700026
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The stability in water of multi-walled carbon nanotubes (MWCNTs) coated with N- or O-rich plasma polymers (PPs) is investigated at different pH values. MWCNTs are coated with PPs by plasma enhanced chemical vapor deposition of ethylene and ammonia or ethylene and carbon dioxide. MWCNTs coated with N-rich PP in water at pH 12 exist as agglomerates that readily sediment, whereas, the agglomerate size decreases and suspension stability increases as the pH changes from 10 to 2. The reverse effect is observed for MWCNTs coated with O-rich PP which form agglomerates at pH 2, but are stable from pH 4-12. By switching the pH of suspensions containing either one of these coated MWCNTs, it is possible to cycle through destabilization and dispersion steps.
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页数：9
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