Adsorption characteristics of Superplasticizer with Waste Plexiglas (WPS) onto Cement Particle Surface
In this study, by using UV-visible adsorption spectrophotometer, ζ-potential analyzer and Xray photo spectroscopy, the adsorption characteristics and surface electrochemical properties of WPS were studied in comparison with traditional naphthalene sulfonated formaldehyde condensates (FDN) whose dispersion ability mainly depends on electrostatic repulsive forces. WPS was prepared through free radical copolymerization in self-Single screw reactive extruder and synthesized from waste plexiglas and vinyl monomers by way of special extrusion modification. The results show that the adsorption of WPS and FDN on cement particle surface approximately conforms to Langmuirs adsorption isotherm. The adsorption of WPS belongs to physical adsorption and its saturated adsorbed quantity was 5.38mg/g. When the dosage of WPS was 1 wt.％ of cement, the thickness of the adsorption layer on the surface of cement particles was 61.2 nm. The ζ-potential of cement particle with WPS changed from positive (15 mV) to negative (-64.74mV) with its concentration increasing from 0 to 20 g/L and decreased from-65.19 to-39.82 mV (reducing by 38.9％) with its concentration of 10 g/L within 60 h.
Waste Plexiglas Superplasticizer Adsorption ζ-potential
Gang Zheng Rumin Wang GaoYang Zhao Zhong Yu
School of Natural and Applied Science, Northwestern Polytechnical University, China School of Gradua School of Natural and Applied Science, Northwestern Polytechnical University, China School of Materials Science and Engineering, Xian University of Technology, China School of Natural and Applied Science, Xian University of Technology, China
国际会议
2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)
广州
英文
547-550
2011-11-18（万方平台首次上网日期，不代表论文的发表时间）