摘要
聚羧酸减水剂(PCE)的应用极大地促进了现代混凝土技术的发展。为了实现PCE分子结构的精准调控以及低耗能生产,其合成工艺本身也在不断发展和推进中。本工作从聚合动力学、微波的热效应与非热效应角度出发开展研究,并以传统水浴合成工艺(热诱导法)作对比,研究结果表明:与传统热诱导法相比,微波诱导法可使聚合时长减少88.9%,转化率提高25.6%,使反应物溶液体系在高浓度、相对较低温度下具有较明显的微波热效应,同时还优化了产物PCE的分子结构(有利于较大分子量的分子生成)并使之具有优异的分散性能。因此,微波诱导法是一种清洁、高效的制备方法,可以实现产品精准合成,未来有望应用于连续化工业生产,大幅提升生产效率。
The application of polycarboxylate superplasticizer(PCE)has greatly promoted the development of modern concrete technology.In order to achieve precise regulation of the molecular structure of PCE and low energy consumption production,the synthesis process itself is also constantly developing and advancing.In this paper,the polymerization kinetics,microwave thermal effect and non-thermal effect were studied and compared with the conventional water bath synthesis process(thermal induction method).The results showed that the reaction time of microwave-induced polymerization was reduced by 88.9%,and the conversion rate was increased by 25.6%.At high concentration and low temperature,the microwave thermal effect of the reactant solution system was obvious,and the molecular structure was optimized(which was beneficial to the formation of molecules with large molecular weight),which had excellent dispersion performance.Therefore,the microwave induction method is a clean and efficient preparation method,which can realize accurate synthesis of products,facilitate continuous industrial applicative production in the future,and greatly improve production efficiency.
作者
王晓媛
张力冉
王栋民
陈洋
张辰
翟馨玥
WANG Xiaoyuan;ZHANG Liran;WANG Dongmin;CHEN Yang;ZHANG Chen;ZHAI Xinyue(School of Chemical&Environmental Engineering,China University of Mining and Technology,Beijing 100083,China;College of Materials Design and Engineering,Beijing Institute of Fashion Technology,Beijing 100029,China)
出处
《材料导报》
北大核心
2025年第10期242-247,共6页
Materials Reports
基金
国家自然科学基金(52202015)
北京市自然科学基金(2232050)。
关键词
微波诱导
聚合速率
微波热/非热效应
分子结构
分散性能
microwave induction
polymerization rate
microwave thermal/non-thermal effect
molecular structure
dispersion property
