新型磺化麦芽糊精减水剂的制备.pdfVIP

学兔兔 全国中文核心期刊 新癯建蟓 中国科技核心期刊 新型磺化麦芽糊精减水剂的制备 吴井志“ ，乔敏“ ，吕志锋 ，余维娜 ，冉千平“ (1．江苏苏博特新材料股份有限公司，江苏 南京 21t103； 2．高性能土木工程材料国家重点实验室 江苏省建筑科学研究院有限公司，江苏 南京 210008) 摘要：以麦芽糊精为原料，吡啶为溶剂，氢氧化钠为催化剂，1，3一丙烷磺内酯为磺化剂，合成磺化麦芽糊精减水剂。并重点研究 了麦芽糊精的DE值、麦芽糊精与磺化剂的配比、催化剂用量、反应温度、反应时间等对磺化反应的影响。结果表明，合成的最优条 件为：麦芽糊精DE值为15，m(磺化剂)：m(麦芽糊精)=1．4，催化剂用量为麦芽糊精质量的l％，反应温度25℃，反应时间12 h。当合 成减水剂的折固掺量为0．5％时，减水率可达25．5％，并且3 d和28 d的混凝土抗压强度指标均符合GB／T 8076--2008《混凝土外加 耥 标准要求。 关键词：减水剂：麦芽糊精；1，3-丙烷磺内酯；取代度 中图分类号：TU528．042．2 文献标识码；A 文章编号；1001—702X(2016)02—0016—03 Preparation of the novel sulfohated maltodextrin water--reducing agent WU Jingzhi ，Q 0 ，LV Zh ngI ，SHE efn。“ ，RAN Qianping1 (1．Jiangsu Sobute New Materials Co．Ltd．，Nanjing’211103，China~2．State Key Laboratory of High Performance Civil Engineering Materials，Jiangsu Provincial Academy of Building Research Co．Ltd．，Nanjing 210008，China) Abstract：In this paper，taking maltodextrin as raw material，sulfonated maltodextrin was synthesized with 1，3-propanesultone in the pyridine as water-reducing agent．The influence of the dextrose equivalent(DE)values of mahodextrin，ratio of mahodextfin and sulfonating agent，amount of catalyst，reaction temperature，reaction time and other factors an the sulfonation reaction were investigated．The results show that optimal conditions of sulfonate WaS mahodextdn with DE S～15，m(sulfonate agent)：m(MD)= 1．4，the catalyst amount Was 1％ by mass realtodextrin，reaction temperature was 25℃，reaction time was 12 h．Performance of the water—reducing agent was tested．When the proportion is O．5％，the water—