文献类型：期刊文献

英文题名：Synthesis, characterization, and performance of novel phosphate-modified polymers as air-entraining agents

作者：Ma, Jianfeng[1,3];Shang, Yazhuo[1];Peng, Changjun[1];Liu, Honglai[1];Zheng, Shuzhen[2];Zhao, Hongxia[3];Qi, Shuai[3];Ran, Qianping[3,4]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Linyi Univ, Sch Chem & Chem Engn, Linyi 276000, Shandong, Peoples R China;[3]Jiangsu Sobute New Mat Co Ltd, State Key Lab High Performance Civil Engn Mat, Nanjing 210008, Jiangsu, Peoples R China;[4]Southeast Univ, Sch Mat Sci & Engn, Nanjing 211189, Peoples R China

年份：2020

卷号：232

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20194207550749);WOS:【SCI-EXPANDED(收录号:WOS:000513297300025)】；

基金：We are grateful to the financial support from National Key Research and Development Program of China (2017YFB0310100), the National Natural Science Foundation of China (Nos. 21476072, 21705067), National Science Fund for Distinguished Young Scholars (51825203), and the Fundamental Research Funds for the Central Universities, Natural Science Foundation of Shandong Province (ZR2017PB013), Natural Science Foundation of Jiangsu Province (BK20160105).

语种：英文

外文关键词：Aryl-polyether-phosphate surfactants; Foam test; Air-void image; DLS test; Air-entraining agents

摘要：Air content can greatly affect the properties of concrete, therefore, the development of high efficient air-entraining agents is important. In this work, novel phosphate-modified polymers with different aryl substitutions were synthesized and used as highly efficient air-entraining agents. The structure of polymers was characterized by H-1 NMR and IR spectra. The foamability and foam stability of the different polymeric surfactants were tested in solutions. Surfactants with large steric hindrance, such as APP-6, showed superior performance of foamability and foam stability. In view of the excellent foamability properties of synthesized polymers in aqueous solution, the application of these polymers used in cement mortar as air-entraining agents were also evaluated for practical application. The surface tension, theoretical calculation and dynamic light scattering test for these polymeric surfactants were also studied. The synthetic aryl-polyether-phosphate surfactants showed higher surface activity, foamability, foam stability, and air-entraining performance compared with commercial air-entraining agent. (C) 2019 Published by Elsevier Ltd.