甲醇-生物柴油对低压橡胶油管影响的试验研究  

Effect of Methanol-Biodiesel on Low-Pressure Rubber Tubing

作　　者：张美娟[1,2] 王忠 ZHANG Meijuan;WANG Zhong(School of Automotive and Traffic,Wuxi Institute of Technology,Wuxi 214121,China;School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]无锡职业技术学院汽车与交通学院,江苏无锡214121 [2]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《车用发动机》2021年第3期82-87,共6页Vehicle Engine

基　　金：国家自然科学基金(51776089);江苏省高校自然科学研究面上项目(17KJD470004);江苏高校“青蓝工程”资助。

摘　　要：以柴油机燃油系统的低压橡胶油管为研究对象,将油管在甲醇-生物柴油中浸泡672 h进行耐油试验,分析了油管的溶胀机理,考察了甲醇-生物柴油及十六烷值改进剂对低压油管形貌、化学结构、几何尺寸、质量、硬度的影响。结果表明,在溶液中浸泡672 h,油管内层有较多“喷霜”,外层没有明显“喷霜”,混合燃料中的甲醇和十六烷值改进剂加剧了橡胶油管的老化;扫描电镜和拉曼光谱的分析结果表明,橡胶油管内部的交联点已经被破坏,化学结构发生变化;在燃料中浸泡0~336 h阶段,油管的几何尺寸、质量均随浸泡时间的增加而增加;336~672 h阶段,油管的几何尺寸、质量增加量减少或有所降低;油管的硬度随浸泡时间的增加而降低。Taking the low-pressure rubber tubing of diesel engine injection system as the research object,the 672 h oil-resistant test was conducted by soaking the tubing into methanol-biodiesel.The swelling mechanism of tubing was analyzed,and the effects of methanol-biodiesel and cetane number improver on low-pressure rubber tubing performance such as appearance,chemical structure,geometry size,mass and hardness were discussed.The results showed that the inner layer of tubing had more"blooming",the outer layer had no obvious"blooming",and methanol and cetane number in blended fuel accelerated the aging of rubber after 672 h soaking.The analysis results of scanning electron microscopy and Raman spectroscopy showed that the cross-linking points inside the rubber tubing had been destroyed and the chemical structure had changed.The geometry size and mass of tubing increased with the increase of soaking time during 0-336 h.The geometry size and mass increase of tubing decreased and the hardness of tubing decreased with the increase of soaking time during 336-672 h.

关 键 词：甲醇 生物柴油 燃油添加 橡胶 油管 溶胀 

分 类 号：TQ515.9[化学工程]