氨基磺酸单环芳烃型高效减水剂的制备及其在水泥颗粒表面的作用机理  

Synthesis of amino-sulfonic acid single aromatic ring type of superplasticizer and study of its dispersing mechanism with cement particles

作　　者：赵晖[1,2] 邓敏[1] 吴晓明[3] 刘冠国[3] 

机构地区：[1]南京工业大学材料科学与工程学院 [2]江苏交通科学研究院,江苏南京211112 [3]江苏交通科学研究院

出　　处：《化工进展》2007年第9期1299-1306,共8页Chemical Industry and Engineering Progress

摘　　要：以对氨基苯磺酸钠、苯酚和甲醛等为原料合成出了氨基磺酸单环芳烃型(AS)高效减水剂,研究了反应单体的摩尔比以及工艺参数对AS高效减水剂对水泥颗粒分散效果的影响。运用现代测试分析方法(IR、GPC)对合成出的氨基磺酸单环芳烃型(AS)高效减水剂进行了官能团和相对分子质量分布的表征,从氨基磺酸单环芳烃型(AS)高效减水剂的表面张力、起泡能力和ξ电位以及其稳定性等方面研究了AS高效减水剂在水泥颗粒表面的作用机理,研究表明静电斥力和空间位阻效应和润滑作用、润湿作用的共同作用,使AS单环芳烃型高效减水剂对水泥颗粒有更好的分散能力和很好的保持性。Amino-sulfonic acid single aromatic ring type （AS） high range water reducer was synthesized form aminobenzene sulfonic acid, phenol and formaldehyde. The influence of monomers ratio, reaction temperature, reaction time, pH value, the concentration of monomer on the performance of AS high range water reducer was analyzed. The molecular structure of amino-sulfonic acid single aromatic ring type high range water reducer was studied with infrared spectroscopy （IR） and gel permeation chromatography （GPC） . The study of surface tension foaming capacity and ξ- potential of cement particles showed the action mechanism of AS high range water reducer on the surface of cement particles. Steric hindrance, electrostatic repulsive force, lubrication and contributed to its better dispersing performance.

关 键 词：氨基磺酸系 高效减水剂 制备 作用机理 

分 类 号：TQ172.46[化学工程—水泥工业]