聚醚聚羧酸磺酸钠对β-半水石膏水化进程与性能的影响  

Influence of Polyether Polycarboxylic Sodium Sulfonate on the Hydration and Dispersion of β-Calcium Sulfate Hemihydrate

作　　者：周平萍 胡学一 夏咏梅 顾正明 丁维均 

机构地区：[1]江南大学化学与材料工程学院,无锡214122 [2]江苏省泰州市正大化工有限公司,泰州225300

出　　处：《硅酸盐通报》2016年第2期485-491,共7页Bulletin of the Chinese Ceramic Society

基　　金："十二五"国家科技支撑计划资助项目(2011BAE30B02;2014BAE03B00)

摘　　要：本实验设计并合成三种聚醚聚羧酸磺酸钠(PC-1、PC-2和PC-3)大分子表面活性剂,以木质素磺酸钠(SLS)为对照,研究了分子结构对β-半水石膏水化过程及分散性的影响。结果表明,三种羧基含量不同的聚醚聚羧酸磺酸钠与SLS对β-半水石膏的凝结时间及分散性与PC系列物和SLS的掺量正相关,且其缓凝能力及其分散性的大小与羧基含量亦正相关。与SLS相比,聚醚聚羧酸磺酸钠能有效延长β-半水石膏的凝结时间,提高β-半水石膏的可操作性。PC与SLS均具有延缓水化的能力,但不会影响其最终的水化度。Three polyether polycarboxylic sodium sulfonate （PC-1, PC-2 and PC-3 ） surfactants were synthesized. The effects of molecular structure on the hydration and the dispersibility of β-calcium sulfate hemihydrate （β-H） were studied with a comparison of PC and sodium lignosulfonate （SLS）. It was found that all assayed polymers delayed setting time and increased dispersibility of β-calcium sulfate hemihydrate in a dose dependent maner, the retarding ability and dispersibility present a positive correlation with the number of carboxylic groups in the molecules. Comparing to SLS, the PC polymers delay the setting time of β-calcium sulfate hemihydrate and improve the operability of β-calcium sulfate hemihydrate. It was found that the PC polymers and SLS possess the ability of delaying hydration, but do not change the final degree of hydration.

关 键 词：β-半水石膏 聚醚聚羧酸磺酸钠 凝结时间 分散性 水化度 

分 类 号：TQ317[化学工程—高聚物工业]