纳米碳酸钙在密封剂中的应用  

Application of nano-CaCO_3 in sealant

作　　者：马仁杰[1] 王自新[1] 王玲[1] 徐哲[1] 

机构地区：[1]黎明化工研究院,河南洛阳471001

出　　处：《无机盐工业》2006年第10期12-15,共4页Inorganic Chemicals Industry

摘　　要：综述了纳米碳酸钙在密封剂中的应用及研究现状。着重介绍了纳米碳酸钙的制备过程中对生产工艺和原料的要求。通过“裂缝与银纹相互转化”机理解释了纳米碳酸钙对密封剂的增强机理和作用。提出了纳米粒子在有机介质中,由微观的“微海效应”导致的宏观的触变性的设想。介绍了纳米碳酸钙在密封剂中应用前所需的表面化学改性及表面物理包敷改性,应用中的物理机械分散及原位聚合。并阐述了不同的条件下纳米碳酸钙对密封剂的伸长率、拉伸强度、动态力学等性能的影响。Application and development of nano - CaCO3 in sealant were reviewed. The requirements of technology and raw materials in the preparation of nano - CaCO3 were emphatically introduced. The reinforcing of sealant modified by nano - CaCO3 was explained via the ＂mutual transfer mechanism of crack and craze＂. The assuming of ＂tiny - sea effect＂ （ microseope） leading to thixotropy（ microscope） of nano- materials in organic medium was presented. The surface chemical modification and surface physical coating modification of nano - CaCO3 before application in sealant,the physical mechnical dispersing and insitu polymerization of nano - CaCO3 during application in sealant were introduced. And the effects of nano - CaCO3 under different conditions on the tensile elongation,tensile strength and dynamic meehnics of sealant were also described.

关 键 词：纳米碳酸钙 裂缝与银纹 表面改性 密封剂 微海效应 

分 类 号：TQ132.32[化学工程—无机化工]