应用化学2025，Vol.42Issue(4)：499-510,12.DOI:10.19894/j.issn.1000-0518.240305
机械活化干法制备高效减水剂羧甲基-β-环糊精工艺及减水性能
Preparation Process and Water-Reducing Performance of Carboxymethyl-β-Cyclodextrin by Mechanically Activated Dry Method
摘要
Abstract
To simplify the preparation process,and facilitate industrial-scale production,carboxymethyl-β-cyclodextrin(CM-β-CD)was prepared via a mechanically activated dry method using β-cyclodextrin(β-CD)and sodium chloroacetate as the raw material.The preparation process was optimized,the structure of CM-β-CD was characterized,and its water-reducing performance was evaluated.The optimal conditions were as follows:the n(C2 H2 ClNaO2)∶n(β-CD)was 4∶1,the mass fraction of NaOH was 20%,the ball milling temperature was 40℃,and the ball milling time was 3 h.Under these conditions,the degree of substitution of CM-β-CD reached 0.72,and the fluidity of the cement paste achieved 237 mm with an addition of the mass fraction of 0.8%CM-β-CD.Compared to CM-β-CD prepared by conventional dry methods,CM-β-CD prepared by the mechanically activated dry method showed superior water-reducing performance.When the mass fraction of CM-β-CD was 0.8%,the water reduction rate in cement mortar was 20.40%,and the compressive and flexural strengths after 28 d of curing were 60.50 and 7.98 MPa,respectively.CM-β-CD is a promising green water-reducing agent for high-performance concrete.关键词
羧甲基β-环糊精/机械活化干法/取代度/水泥净浆流动度/高效减水剂Key words
CM-β-CD/Mechanically activated dry method/Degree of substitution/Fluidity of cement paste/High-performance water-reducing agent分类
化学引用本文复制引用
杨家添,苗雨,韦梦婷,王宁,黎以起,陈渊,覃峰,胡华宇..机械活化干法制备高效减水剂羧甲基-β-环糊精工艺及减水性能[J].应用化学,2025,42(4):499-510,12.基金项目
国家自然科学基金(No.22268005)、广西科学研究与技术开发计划项目(No.桂科AB18050004)和国家级大学生创新创业训练计划项目(No.202310606025)资助 Supported by the National Natural Science Foundation of China(No.22268005),Guangxi Science and Technology Plan Project,China(No.GuikeAB18050004)and the National Undergraduate Training Program for Innovation and Program(No.202310606025) （No.22268005）
