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Effect of amphoteric dispersant on the dispersion properties of nano‐ S i O 2 particles
Author(s) -
Gao RuiJun,
Yao Yan,
Wu Hao,
Wang Ling
Publication year - 2017
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.45075
Subject(s) - dispersant , zeta potential , dispersion (optics) , chemical engineering , copolymer , polymer chemistry , viscosity , acrylic acid , nano , rheology , materials science , suspension (topology) , chemistry , nanoparticle , composite material , nanotechnology , polymer , physics , mathematics , engineering , homotopy , pure mathematics , optics
An amphoteric polycarboxylate dispersant (APC) was synthesized by copolymerization of acrylic acid (AA), methacryloxyethyltrimethyl ammonium chloride (DMC), and isopentenol polyoxyethylene ether (IPEG). The molecular structure of APC was characterized by FT‐IR, 1 H‐NMR, and GPC. Effect of the dosage of APC on the rheological performance of nano‐SiO 2 suspension was investigated by measurements of the plastic viscosity. The results indicated that the best dispersion effect of APC was obtained when the dosage of APC was about 10 wt % (by the weight percent of nano‐SiO 2 ), which can maintain the dispersion of nano‐SiO 2 suspension uniformly for 4 h without settlement. Meanwhile, the zeta potential value on the surface of nano‐SiO 2 particles shows that the better dispersion performance of APC was attributed to the solvation water film formed by the polyoxyethylene side chains and the electrostatic repulsion formed by positively groups (CN + ) on the APC structure combined with ‐SiO – groups on the surface of nano‐SiO 2 particles. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45075.