零维纳米坡缕石载Ag复合材料的制备及其表征  

Preparation and Characterization of Zero-dimensional Nano-palygorskite Carrying Ag Composite

作　　者：李屹[1] 周元康[1] 杨绿[1] 朱湘宁[1] 张勇杰[1] 

机构地区：[1]贵州大学机械工程学院,贵州贵阳550003

出　　处：《非金属矿》2010年第1期70-72,共3页Non-Metallic Mines

基　　金：国家自然科学基金项目(50965004);贵州大学研究生创新基金项目(校研理工2009019)

摘　　要：坡缕石/Ag纳米复合材料制备过程中,坡缕石零维纳米粒子各方向尺寸均在纳米级之内,与天然纤维状的一维纳米坡缕石相比极易团聚而导致载Ag能力较差,提高其载Ag能力即提高纳米Ag比分是亟需解决的问题。本实验针对用于润滑油添加剂的零维纳米坡缕石载Ag复合材料的制备方法进行了研究,对比了不同反应时间对Ag纳米还原生成的影响,探索用含-NH2的硅烷偶联剂同时作为抑制剂和分散剂作用于坡缕石和Ag纳米粒子,获得零维纳米坡缕石载Ag量较高的材料制备方法和较佳的工艺参数。通过TEM表征分析,使用适量的KH550偶联剂调节,在70℃条件下反应时间为30min可以获得材料中较高的Ag纳米含量,制备出的纳米坡缕石载Ag复合材料颗粒粒径分布均匀,团聚少,并且纳米Ag均匀附着在坡缕石颗粒上。During the preparation of palygorskite/Ag nano-composite material, the palygorskite zero-dimensional nano-particle is easier to agglomerate than the natural fabric one-dimensional nano-palygorskite. As a result, the zero-demensional nano-palygorskite has poor capability of carrying Ag. Improving the carrying Ag capability, namely increasing the proportion of nano-Ag in the composite, is an urgent problem. In this experiment, the preparation method of zero-demensional nano-palygorsikte carrying Ag composite applied on lubrication additive was investigated. The effect of different reducing reaction time on formation nano-Ag was discussed. Silicane coupling agent contained -NH2 was employed as inhibitor and dispersant, which acted on nano-palygorskite and nano-Ag granule for increasing the proportion of nano-Ag in the composite. And the preparation method and technological parameters were obtained. The results of TEM characterization showed that when the reaction time was 30 minutes, reaction temperature was 70 ℃, the proportion of carrying Ag in zero-demensional nano-palygorsikte was increased by using proper KH550 coupling agent. The nano-palygorsikte carrying Ag composite granule prepared has uniform distribution of particle size, and is less agglomerated. Moreover, these nano-Ag granules are attached evenly on the nano-palygorsikte.

关 键 词：零维纳米坡缕石 载银能力 润滑添加剂 

分 类 号：TB333[一般工业技术—材料科学与工程]