二元超双亲自组装成膜材料的制备与应用  

Preparation of Monolayers by Amphiphilic Molecules Self-assembly and Its Application

作　　者：刘加平[1] 田倩[1] 缪昌文[1] 李磊[1] 冉千平[1] 丁寅[1] 

机构地区：[1]江苏省建筑科学研究院有限公司,江苏南京210008

出　　处：《建筑材料学报》2010年第3期335-340,共6页Journal of Building Materials

基　　金：国家重点基础研究发展规划(973计划)项目(2009CB23200);国家自然科学基金资助项目(50978126;50808094)

摘　　要：采用乳化长链脂肪醇的技术途径,在空气/水界面上自铺展形成连续、无缺陷的单分子膜,减少水分可通过面积,提高蒸发阻滞,制备出塑性混凝土水分蒸发抑制剂.该抑制剂能有效减少混凝土水分蒸发,抑制孔隙负压的增长,延缓表面干燥速度,显著延长塑性收缩裂缝出现的时间,对塑性裂缝的出现具有抑制作用,为高耐久、低水灰比的公路和道面混凝土顺利施工,以及高性能混凝土在中西部环境条件恶劣地区的应用提供了必要的配套技术.By using a novel water emulsion containing long-chain aliphatic alcohol,a continuous and dense monolayer could be formed on the air/water interface.The formed monolayer could decrease the area for the gas transport of water molecules and increase the resistance to water evaporation on the plastic concrete surface.The water emulsion named evaporation retardant could retard the water loss,inhibit the increase of capillary under pressure,delay surface dry,and prevent plastic shrinkage cracks of concrete.So a good solution is provided to prepare concrete with high durability and low water/cement ratio in road construction,and prepare high performance concrete for use in harsh conditions,such as in northwest China.

关 键 词：混凝土 水分蒸发 自组装成膜 孔隙负压 

分 类 号：TU528.01[建筑科学—建筑技术科学]