掺加改性淀粉制备聚羧酸减水剂及其应用  

Synthesis and Application of Polycarboxylate Superplasticizer with Modified Starch

作　　者：何廷树[1] 杨仁和[1] 徐一伦 李同新 房佳斌 HE Tingshu;YANG Renhe;XU Yilun;LI Tongxin;FANG Jiabin(College of Materials and Mineral Resources,Xi’an University of Architecture and Technology,Xi’an 710055;Shaanxi Youbang New Material Technology Co.Ltd.,Xi’an 712046)

机构地区：[1]西安建筑科技大学材料与矿资学院,西安710055 [2]陕西友邦新材料科技有限公司,西安712046

出　　处：《材料导报》2018年第4期646-649,共4页Materials Reports

基　　金：陕西省工业攻关项目(2016GY-205)

摘　　要：选取经过降解处理的羧甲基淀粉醚(CMS-Na)代替部分异戊烯基聚氧乙烯醚(TPEG)制备一种新型聚羧酸系减水剂(PC2),利用水泥净浆单组分试验得出CMS-Na对TPEG的最佳替代量为15%。另外,用红外光谱(FTIR)对CMS-Na及聚羧酸减水剂的分子结构进行了表征。结果表明,掺加CMS-Na合成的PC2不仅降低了原材料的成本,而且具有良好的分散性和保塑性,同时不影响混凝土强度。A new type of polycarboxylate superplasticizer(PC2)was synthesized by using the carboxymethyl starch ether(CMS-Na)to replace part of isopentenyl polyoxyethylene ether(TPEG).The best substitute of CMS-Na for TPEG was obtained by single component test of cement paste,which was 15%.In addition,the molecular structure of CMS-Na and polycarboxylate superplasticizer was characterized by infrared spectroscopy(FTIR).The results showed that PC2 not only reduced the cost of raw mate-rials,but also had excellent dispersion and plastic preservation abilities,while do no harm to the compressive strength of concrete.

关 键 词：聚羧酸减水剂 羧甲基淀粉醚 异戊烯基聚氧乙烯醚 替代量 混凝土 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]