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Cyclodextrin‐modified polycarboxylate superplasticizers as dispersant agents for multiwalled carbon nanotubes
Author(s) -
Meng Yeyun,
Liao Bing,
Pang Hao,
Zhang Jingfei,
Song Lingxia
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47311
Subject(s) - dispersant , materials science , copolymer , dispersion (optics) , chemical engineering , carbon nanotube , superplasticizer , mesoporous material , scanning electron microscope , ethylene glycol , nuclear chemistry , composite material , cement , organic chemistry , chemistry , polymer , catalysis , physics , optics , engineering
A new type poly(AA‐ co ‐β‐CD‐A‐ co ‐TPEG) (PACD) copolymer was prepared by the copolymerization of a novel monovinyl β‐cyclodextrin monomer (β‐CD‐A), acrylic acid, and isoprenyl oxy poly(ethylene glycol) (TPEG‐2400). This copolymer could be used as dispersant for multiwalled carbon nanotubes (MWCNTs), which exhibit an excellent dispersion ability. This study mainly investigated the dispersing behavior of the PACD as well as the best ratio between these dispersants and MWCNTs. Transmission electron microscopy was employed to observe the morphology of the dispersed of MWCNTs. ultraviolet–visible–near infrared spectra were utilized to determine the dispersion of MWCNTs and the optimum concentration of PACD. It was found that the polycarboxylate superplasticizer decreased MWCNTs aggregative tendency in water but not as well as PACD. Moreover, the optimum mass ratio of the PACD to the MWCNTs is 5:1. In addition, the effect of PACD on the dispersion ability of MWCNTs was evaluated in cement samples. Our results indicated that MWCNTs could still disperse well with the help of PACD even with the presence of cement. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47311.