摘要
文中为了节约能耗,设计了一种低温合成聚羧酸减水剂的方法采用异戊烯醇聚氧乙烯醚(TPEG)、丙烯酸(AA)为反应单体,过硫酸铵(APS)、双氧水(H_(2)O_(2))为引发剂,抗坏血酸(VC)为还原剂,偏重亚硫酸钠为催化剂,巯基丙酸为链转移剂,通过自由基共聚反应,在低温条件下成功合成了聚羧酸减水剂,并研究不同试验条件对聚羧酸减水剂分子量及其分布、水泥净浆流动度的影响,最终确定了最佳合成条件,采用红外光谱对减水剂的分子结构进行表征,说明采用路线合成了聚羧酸减水剂.采用减水剂Zeta电位、吸附量测试研究了减水剂在水泥净浆中的吸附行为,为减水剂的合成与实际应用提供大量的理论支持,最终低温合成一种聚羧酸减水剂.
Aiming at saving energy consumption,a method of synthesize polycarboxylic acid water reducing agent at low temperature is proposed.In which,isoprenyl polyethylene ether(TPEG)and acrylic acid(AA)are taken as the reaction monomer;ammonium persulfate(APS)and hydrogen peroxide(H_(2)O_(2))are taken as the initiators;ascorbic ac-id(VC)is taken as a reducing agent;emphasis on sodium sulfite is taken as the catalyst;mercaptopropionic acid is taken as the chain transfer agent.Via the free radical copolymer reaction,the polycarboxylic acid water-reducing agent is successfully synthesized at low temperatures.The influence of different experimental conditions on the mo-lecular weight and distribution of polycarboxylic acid water reducer and the flow of cement is studied.The optimal synthesis conditions are finally determined,and the characterization of the molecular structure of the water reducer is carried out by infrared spectroscopy.It shows that the polycarboxylic acid water-reducing agent is synthesized in this route.In addition,the adsorption behavior of Zeta in the cement slurry is studied,providing great theoretical sup-port for the synthesis and practical application,in which a polycarboxylic acid water-reducing agent is finally synthe-sized at a low temperature.
作者
李博
王欢
李海滨
LI Bo;WANG Huan;LI Haibin(College of Materials Science and Engineering,Jilin Jianzhu University,Changchun 130118,China)
出处
《低温建筑技术》
2023年第2期44-47,51,共5页
Low Temperature Architecture Technology
基金
吉林省科技发展计划重点研发项目“功能性抗泥聚羧酸高效减水剂的研发与应用”(20210203098SF)。
关键词
聚羧酸减水剂
低温合成
结构性能
polycarboxylic acid water reducer
low temperature synthesis
structural properties
作者简介
李博(1994-),男,吉林白山人,硕士研究生,研究方向:聚羧酸减水剂;通信作者:王欢(1981-),女,吉林镇赉人,博士研究生,副教授,研究方向:聚羧酸减水剂、催化材料制备及应用领域。
