Schiff碱铜(Ⅱ)配合物改性超高分子量聚乙烯的低速滑动摩擦研究  

The Sliding Friction of UHMWPE Modified by Schiff Base Copper(Ⅱ) Complex Tested at Low Speeds

作　　者：吴莉[1,2] 高新蕾[3] 高万振[1] 

机构地区：[1]武汉材料保护研究所,湖北武汉430030 [2]武汉工程大学化工与制药学院绿色化工过程省部共建教育部重点实验室湖北省新型反应器与绿色化学工艺重点实验室,湖北武汉430073 [3]武汉工业学院化学与环境工程系,湖北武汉430023

出　　处：《摩擦学学报》2010年第5期453-460,共8页Tribology

基　　金：国家自然科学基金项目(50575164)资助

摘　　要：采用微摩擦试验机，在于摩擦和植物油润滑条件下分别考察了法向载荷、滑动速度和试验持续时间对含质量分数5％、10％及15％乙二胺缩水杨醛西佛碱（Schiff碱）铜（Ⅱ）配合物的改性超高分子量聚乙烯（UHMWPE）与铬钢（100Cr6）配副在50～1600μm/s滑动速度范围的摩擦系数的影响，并与纯UHMWPE进行了对比．结果表明：在低速滑动条件下，含质量分数5％-15％乙二胺缩水杨醛Schiff碱铜（Ⅱ）配合物的改性UHMWPE在植物油润滑或干摩擦时的摩擦系数与法向载荷无关，摩擦系数明显小于纯UHMWPE，尤其是在干摩擦时的摩擦系数均较纯UHMWPE降低29％；当改性UHMWPE中乙二胺缩水杨醛Schiff碱铜（Ⅱ）配合物含量足够大（如15％）时，可减小植物油润滑时的滑动速度对摩擦系数的影响；而含5％～15％乙二胺缩水杨醛Schiff碱铜（Ⅱ）配合物的改性UHMWPE在于摩擦时的摩擦系数基本与滑动速度、试验持续时间无关．乙二胺缩水杨醛Schiff碱铜（Ⅱ）配合物改性的UHMWPE在于摩擦条件下稳定的低速滑动摩擦特性，符合纳米定位对摩擦副材料所期望的性能．Influences of normal load, sliding speed and sliding duration on friction coefficient of ultrahigh molecularweight polyethylene （UHMWPE） modified by 5%, 10% and 15% copper （Ⅱ） complex in mass fraction of bissalieylaldehyde - ethylenediamine （ Schiff base copper （Ⅱ ） complex） respectively were investigated on a microtribometer in a speed range of 50 -1600μm/s under conditions of dry friction and vegetable oil lubricated condition. A 100Cr6 steel ball was used as counterpart. Pure UHMWPE was also tested as a reference. Results showed that the friction coefficient of modified UHMWPE with 5% - 15% （mass fraction） Schiff base copper （Ⅱ ） complex was independent from normal load at low sliding speeds in dry condition or using vegetable oil as a lubricant. And it was much lower than that of pure UHMWPE, i. e. the friction coefficient of all modified UHMWPE in dry condition had a 29% reduction as compared to that of pure UHMWPE. The results also showed that the effect of sliding speed on friction coefficient under the lubricated condition could be decreased as the content of Schiff base copper （Ⅱ） complex in the modified UHMWPE was high enough, e.g. 15%. The results showed that the friction coefficient of modified UHMWPE with 5% - 15% Schiff base copper （Ⅱ） complex was independent from sliding speed and sliding duration under dry condition. The stable friction coefficient of the modified UHMWPE at low speeds under dry sliding can meet the requirement of frictional pair for the nanopositioning application.

关 键 词：乙二胺缩水杨醛Schiff碱铜(Ⅱ)配合物 超高分子量聚乙烯(UHMWPE) 低速滑动摩擦 往复滑动 

分 类 号：TH117.3[机械工程—机械设计及理论]