引用本文:
戴肖南, 侯万国, 李淑萍. 无机电解质及聚合物对Mg-Al-混合金属氢氧化物-高岭土分散体系触变性的影响[J]. 应用化学,
2002, 19(4): 338-341.
Citation: DAI Xiao-Nan, HOU Wan-Guo, LI Shu-Ping. Influences of Electrolyte and Polymer on the Thixotropy of Magnesium-Aluminum Hydroxide-Kaolinite Suspension[J]. Chinese Journal of Applied Chemistry, 2002, 19(4): 338-341.
Citation: DAI Xiao-Nan, HOU Wan-Guo, LI Shu-Ping. Influences of Electrolyte and Polymer on the Thixotropy of Magnesium-Aluminum Hydroxide-Kaolinite Suspension[J]. Chinese Journal of Applied Chemistry, 2002, 19(4): 338-341.
无机电解质及聚合物对Mg-Al-混合金属氢氧化物-高岭土分散体系触变性的影响
摘要:
研究了3种无机解质(NaCl、MgCl2、AlCl3)和1种聚合物(部分水解聚丙烯酰胺,PHPA)对Mg-Al型混合金属氢氧化物(MMH)-高岭土分散体系触变性的影响.实验结果表明,3种无机电解质的浓度在所研究范围内由小变大,均不改变MMH/高岭土质量比(R)为0.029体系的正触变性类型,但可使R=0.129的Mg-Al-MMA-高岭土体系由复合触变性转变为正触变性.PHPA的浓度在所研究的范围内由小变大,可使R=0.129的体系由正触变性转变为复合触变性,使R=0.129的体系由复合触变性转变为负触变性.3种无机电解质和PHPA都可降低各分散体系的粘度.对各因素的影响机理了初步探讨
English
Influences of Electrolyte and Polymer on the Thixotropy of Magnesium-Aluminum Hydroxide-Kaolinite Suspension
Abstract:
The influences of electrolytes(NaCl、MgCl2 and AlCl3) and partially hydrolyzed polyacrylamide (PHPA) on the thixotropy of magnesium aluminum mixed metal hydroxide(Mg-Al-MMH) kaolinite suspension have been studied. The results show that the thixotropic fluid type of Mg-Al-MMH kaolinite suspension with mass ratio of MMH to kaolinite R=0.029 was independent of the concentration of the electrolytes, whereas increase in electrolyte concentration could cause Mg-Al-MMH kaolinite system with R=0.129 to be transformed from complex thixotropy to positive thixotropy. With the increase of PHPA content, the thixotropic type of the MMH kaolinite suspension with R=0.029 transformed from positive thixotropy to complex thixotropy and the suspension with R=0.129 from complex to negative thixotropy. All the three electropytes and PHPA could reduce the viscosity of the Mg-Al-MMH kaolinite suspensions. The mechanism of the thixotropy has been discussed briefly.
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Key words:
- hydrotalate-like compound
- / kaolinite
- / thixotropy
- / rheology
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