Abstract: Nanomaterials are widely used in the fields of electronics, medicine, polymer materials and cement based materials. In order to solve the problem of dispersing of nanomaterials in cement based materials, a particular molecular structure of nano-particle dispersing agent (NDA) was synthesized by free radical copolymerization of acrylic acid (AA), methacryloxyethyltrimethyl ammonium chloride (DMC) and isopentenol polyoxyethylene ether (IPEG). The molecular structure of NDA was characterized by FTIR, 1H-NMR and GPC. Effect of the dosage of NDA on the rheological performance was investigated by measurements of the visco-sity of nano composite powder slurry. The results indicated that NDA was prepared successfully by the AA, DMC and IPEG, and the best dispersion properties of NDA was obtained when the molar ratio of AA∶DMC∶IPEG was 4.5∶0.3∶1 and the dosage of initiator was 2%. The viscosity of nano composite powder slurry can reduce to 3 091 MPa·s. Meanwhile, the results of zeta potential and TOC indicated that the better dispersion performance of NDA was attributed to the electrostatic adsorption action of positively groups and negatively groups on the surface of nano composite powder, and then depended on the steric hindrance action of polyoxye-thylene side chains (PEO).
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2018, Vol. 32 
