钾离子对丁腈橡胶在含砂介质中摩擦磨损行为的影响

发布时间：2018-02-15 03:20

本文关键词： 螺杆泵丁腈橡胶 KCl溶液砂粒摩擦磨损　出处：《润滑与密封》2017年01期 　论文类型：期刊论文

【摘要】：利用自行设计的往复式磨损试验机研究丁腈橡胶在含砂KCl溶液和蒸馏水2种介质中的摩擦磨损行为,并利用场发射扫描电镜对橡胶磨痕的表面形貌及元素含量进行分析。结果表明:在2种介质中,随着载荷的增加,丁腈橡胶的摩擦因数降低而磨损量增加,但在含砂的KCl溶液介质中摩擦因数和磨损量的变化程度均高于在含砂蒸馏水介质中。丁腈橡胶在含砂KCl溶液的磨损机制为腐蚀磨损以及磨粒滑动侵蚀,在含砂蒸馏水中的磨损机制为湿磨粒磨损。K+使得丁腈橡胶表层及亚表层分子链更容易断裂,进而生成了分子量和分散性都低的产物和小分子单体,以及新的支联网状结构。
[Abstract]:The friction and wear behavior of nitrile butadiene rubber (NBR) in KCl solution containing sand and distilled water was studied by using a reciprocating wear tester designed by ourselves. The surface morphology and element content of rubber wear mark were analyzed by field emission scanning electron microscope. The results showed that the friction coefficient of NBR decreased and the wear amount increased with the increase of load in two kinds of media. However, the variation of friction coefficient and wear amount in KCl solution containing sand is higher than that in distilled water medium containing sand. The wear mechanism of NBR in KCl solution containing sand is corrosion wear and sliding erosion of abrasive particles. The wear mechanism in distilled water containing sand is wet abrasive wear. K makes the molecular chains of nitrile butadiene rubber surface and subsurface layer easier to break, thus producing products and small molecular monomers with low molecular weight and dispersity, as well as new branched reticular structures.
【作者单位】：沈阳工业大学机械工程学院;
【基金】：辽宁省自然科学基金项目(2013020039) 辽宁高等学校创新团队支持计划项目(LT2014003)
【分类号】：TQ333.7;TB302.3

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