Synthesis, Properties and Dispersion Mechanism of Sulphonated Acetone-formaldehyde Superplasticizer in Cementitious System

The synthesis, properties and dispersion mechanism of sulphonated acetone-formaldehyde superplasticizer （SAF） were presented. This superplasticizer was synthesized by the reaction among acetone, formaldehyde, sodium sulfite and pyrosulfite. The structure and property were respectively characterized by IR and surface tension measurement. Performance of SAF in cement was evaluated by paste flow as well as heat calorimetry. The dispersion mechanism was identified via adsorption and zeta potential measurement. The results show that cement paste mixed with SAF shows good fluidity. SAF exerts little retarding effect on cement paste and it behaves like a typical polycondensate superplasticizer. The main dispersion mechanism of SAF is attributed to electrostatic repulsion.

SAF的合成机理及分散性能研究

以丙酮、甲醛和亚硫酸盐为主要原料合成出了磺化丙酮 -甲醛缩聚物减水剂 (SAF) ,研究了原料配比、加料方式及反应条件对缩聚反应和产物分散性能的影响 。

磺化丙酮-甲醛缩聚物油井水泥分散剂的合成

介绍了磺化丙酮-甲醛缩聚物(SAF)油井水泥分散剂的合成方法及条件,并对其性能进行了试验研究。实验结果表明,SAF水泥分散剂对油井水泥具有良好的分散减阻作用,是一种有发展前途的固井水泥浆添加剂。

合成条件对磺化丙酮-甲醛缩聚物性能的影响

本文改进了磺化丙酮-甲醛缩聚物的合成方法,讨论了合成条件对产物作为油井水泥浆分散剂的性能的影响。