以β-环糊精和氯乙酸为原料,通过亲核取代反应制备了混凝土减水剂羧甲基-β-环糊精(CM-β-CD),讨论了反应物物质的量比、反应温度和反应时间对CM-β-CD的取代度及应用性能的影响.结果表明,当氯乙酸与β-环糊精物质的量比为6∶1、反应温度为60℃、反应时间为5h时,所得CM-β-CD的取代度最大为0.68.水泥净浆实验表明净浆流动度随着取代度的增加而增加,减水剂的最佳掺量为0.8％,减水率为23.5％.红外光谱(FTIR)和核磁共振光谱(NMR)检测结果表明β-环糊精和氯乙酸发生了反应.
参考文献
| [1] | 王田堂,严云,胡志华,赵萍.用作混凝土减水剂的改性淀粉的合成及分散性能[J].硅酸盐学报,2010(07):1191-1196. |
| [2] | D.-F.Zhang;B.-Z.Ju;S.-F.Zhang .The study on the synthesis and action mechanism of starch succinate half ester as water-reducing agent with super retarding performance[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2008(1):80-84. |
| [3] | Dong-Fang Zhang;Ben-Zhi Ju;Shu-Fen Zhang .The study on the dispersing mechanism of starch sulfonate as a water-reducing agent for cement[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2007(4):363-368. |
| [4] | Peschard A;Govin A;Pourchez J et al.Effect of polysaccharides on the hydration of cement suspension[J].Journal of the European Ceramic Society,2006,26(18):1439. |
| [5] | Karen Friedemann;Frank Stallmach;Jorg Karger .Carboxylates and sulfates of polysaccharides for controlled internal water release during cement hydration[J].Cement & concrete composites,2009(4):244-249. |
| [6] | Laetitia Patural;Philippe Marchal;Alexandre Covin .Cellulose ethers influence on water retention and consistency in cement-based mortars[J].Cement and Concrete Research,2011(1):46-55. |
| [7] | lzaguirre A;Lanas J;(A)lvarez J I .Behavior of a starch as a viscosity modifier for aerial lime-based mortars[J].Carbohydrate Polymers,2010,80(01):222. |
| [8] | Simone Knaus;Birgit Bauer-Heim .Synthesis and properties of anionic cellulose ethers: influence of functional groups and moleuclar weight on flowability of concrete[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2003(4):383-394. |
| [9] | Badruddoza, A.Z.M.;Hazel, G.S.S.;Hidajat, K.;Uddin, M.S. .Synthesis of carboxymethyl-β-cyclodextrin conjugated magnetic nano-adsorbent for removal of methylene blue[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2010(1/3):85-95. |
| [10] | Dong Zhao;Liang Zhao;Chengshen Zhu .Synthesis and properties of water-insoluble β-cyclodextrin polymer crosslinked by citric acid with PEG-400 as modifier[J].Carbohydrate Polymers: Scientific and Technological Aspects of Industrially Important Polysaccharides,2009(1):125-130. |
| [11] | 朱军峰,张光华,李楠,高建才.羧甲基-β-环糊精的干法制备[J].应用化学,2008(06):681-684. |
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