共搜索到8646条信息,每页显示10条信息,共865页。用时:0小时0分0秒655毫秒
蒙脱石分散体系中用Zeta电位修正静电作用能的计算杨宗义,刘文礼,焦小淼,任志静中国矿业大学(北京)化学与环境工程学院摘 要:针对扩展DLVO理论的静电作用能计算中表面电位难以测定,讨论以Zeta电位代替表面电位进行静电作用能计算的可行性.计算了蒙脱石表面电位,运用扩展的DLVO理论分别用Zeta电位和表面电位计算蒙脱石悬浮液的临界硬度,并通过蒙脱石悬浮液的临界硬度试验进行验证.试验结果表明:(1)悬浮液中蒙脱石颗粒表面与滑动面之间的水和电解质离子起到屏蔽表面电位的作用,表面电位计算的静电势能并不能反映颗粒间的静电作用;用Zeta电位代替表面电位计算颗粒间静电作用能,与实验结果更相符;(2)颗粒间滑动层开始接触时,水化作用能开始增大,电解质离子不仅减小了颗粒间的静电斥力,还减小了滑动层厚度,使水化作用......
solution. The electrochemical behavior of the coatings was studied by means of zeta potential analysis, voltammetry and electrochemical impedance spectroscopy (EIS). It was found that the zeta potential... as the inert particles and confirm the existence of a thin aluminum oxide layer on the surface of aluminum particles. Key words: Ni-Al coating; zeta potential; voltammetry; electrochemical impedance......
......
between Zeta (ζ) potential and the photocatalytic activity of different RE doped anatase TiO2 were also investigated. The Y-doped anatase TiO2 was found with the special two iso-electric points and three ζ...Surface ζ potential and photocatalytic activity of rare earths doped TiO2宋绵新,边亮,周天亮,赵效勇摘 要:The iso-electric point of different rare earths (La, Ce, Y......
......
......
原因归结于静电空间位阻效应. 关键词:纳米TiN; 分散性; PEI; Zata电位; nano TiN; dispersity; polyethylene imine (PEI); Zeta potential; [全文内容正在添加中] ...纳米TiN在水中的分散行为研究 丰平1,李晓贺1,张晓明1,郑立允2,赵玉玲1 (1.三峡大学,湖北,宜昌,443002;2.河北工程大学,河北,邯郸,056038) 摘要:通过测定沉降体积和粘度,研究了纳米TiN在水中的分散行为和表面活性剂聚乙烯亚氨(PEI)对分散的影响,用Zeta电位测定了颗粒表面的荷电变化,提出了分散机理.结果表明:pH值对纳米TiN在水中的分散性有很大的影响,等电......
......
; zeta potential; contact angle; butyl xanthate (KBX); ammonium dibutyl dithiophosphate (ADD); kerosene 1 Introduction Froth flotation only well responds to mineral particles in a narrow size range... then transferred to the rectangular capillary cell of the instrument to measure the zeta potential four times. The average value of ζ potentials of four measurements was reported as final results......
J. Cent. South Univ. (2017) 24: 2664-2673 DOI: https://doi.org/10.1007/s11771-017-3679-2 Real-time rear-end crash potential prediction on freeways QU Xu(曲栩)1, WANG Wei(王炜)1, WANG Wen-fu(王文夫)2, LIU... Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2017 Abstract: This study develops new real-time freeway rear-end crash potential predictors using support vector......