纳米SiO2树脂涂敷砂的改性方法优选与制备  

Modification Method Optimization and Preparation of Nano-SiO_2 Modified Resin Coated Sand

作　　者：齐宁[1] 张琪[1] 王恒[2] 姚佳[2] 尚宝兵[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东东营257061 [2]中国石油大学(华东)石油工程学院,青岛

出　　处：《特种铸造及有色合金》2009年第12期1096-1098,共3页Special Casting & Nonferrous Alloys

基　　金：2008年中国石油化工股份有限公司提高采收率导向项目(部级先导2008-016)

摘　　要：采用简易共混法与超声波分散溶液共混法将纳米SiO2粒子均匀分散到水溶性酚醛树脂中,通过测定改性后树脂涂敷砂的抗压强度,研究了纳米SiO2粒子的加入量对树脂涂敷砂力学性能的影响,确定了改性树脂用纳米SiO2的最佳用量,并通过扫描电镜分析了采用简易共混法与溶液共混法时纳米SiO2粒子在树脂基体中分散性能的差异。结果表明,采用超声波分散溶液共混法分散纳米粒子要优于简易共混法,可以使纳米SiO2粒子均匀地分散到酚醛树脂中,从而大幅提高树脂的力学性能。但当纳米SiO2粒子用量过多时,易发生团聚,致使树脂力学性能反而下降,经试验确定,纳米SiO2的最佳用量为树脂质量分数的3%。Nano-SiO2,with large specific surface area and numerous uncoupled surface atoms,has ability of combine physically and chemically with resin matrix strongly to strengthen and toughen resin.Nano-SiO2 was uniformly dispersed in water soluble phenol-formaldehyde resin by simple co-blended process and by ultrasonic dispersing solution co-blended process,respectively.Effects of nano-SiO2 on mechanical properties of resin coated sand were investigated by testing compressive strength of modified resin coated sand,and the optimized nano-SiO2 content for modification of resin was presented.Dispersed difference of nano-SiO2 particles in resin matrix by simple co-blended process and in solution co-blended process was analyzed by SEM.Results show that ultrasonic dispersing solution co-blended process is superior to simple co-blended process in dispersing nano-SiO2 particles into phenol-formaldehyde resin to greatly improve the mechanical properties of the resin.However,with excessive nano-SiO2,mechanical properties of the resin are deteriorated as a result of occurrence of easy aggregation.The optimized fraction of nano-SiO2 is 3% of the resin mass by experimental testing.

关 键 词：纳米SIO2 树脂涂敷砂 酚醛树脂 溶液共混法 力学性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]