共查询到17条相似文献,搜索用时 93 毫秒
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以植物油为基础油的润滑剂,摩擦系数低,可生物降解,无污染,同时低荧光,不影响对地质资料的分析和评价,但其氧化稳定性和热稳定性差,不耐高温和高压.为解决植物油在高温下易氧化而失去其良好抗磨损性能这一难题,将层状固体润滑剂加入植物油中,研制出了新型无荧光润滑剂jd-1,利用UTM-2球盘式摩擦试验机考察不同润滑剂试样的摩擦曲线,同时在摇臂钻床上模拟钻探的摩擦情况,然后利用扫描电子显微镜作不同条件下钻头磨损形貌的观察和分析.结果表明,层状固体润滑剂可以降低植物油的摩擦系数,从而提高润滑油的减摩性能,同时即使植物油在被高温氧化的情况下仍能保持良好的减摩性能. 相似文献
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文章综述了植物油作为润滑油基础油的特性,植物油具有生物可降解性、低挥发性和优良的润滑性、良好的黏温性等特点,但作为润滑油基础油存在氧化安定性差、低温性能差的问题,不能直接应用,需要对其进行改性。分析了对植物油进行遗传基因改性和化学改性的方法和进展。通过遗传基因改性可有效提高植物油中的油酸含量,进而改善了植物油的热氧化稳定性和低温性能。化学改性主要针对植物油分子中的C=C双键进行的,介绍了植物油的氢化、环氧化和酯交换改性方法。分析表明针对植物油进行环氧化再开环反应的改性是一种行之有效的方法。最后针对改性植物油作为可降解润滑油基础油提出了研究方向并做了展望。 相似文献
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可生物降解的植物油作为内燃机润滑油的研究与应用 总被引:7,自引:0,他引:7
综合分析了各种润滑油的生物降解性能与其结构及组成的关系。通过研究植物油的物性及其润滑机理,指出植物油作为润滑油的基础油料是一种可再生资源。由于植物油分子中含有酯基和不饱和的双键结构,其氧化安定性和水解稳定性较差,是其用作润滑油的瓶颈,但可以通过简单的化学处理如氢化和酯交换来提高其氧化安定性。考虑添加剂在基础油中的感受性及其对生态环境的影响也是非常重要的。 相似文献
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植物油用做液压油基础油的研究 总被引:5,自引:0,他引:5
研究了低芥酸菜籽油、花生油、葵花籽油、橄榄油、蓖麻油和玉米油等植物油用做生物降解液压油基础油的性能。结果表明,植物油以特殊分子结构,使其具备了不同于矿物基础油的性能,它除具有生物可降解性外,速具有粘度指数高,粘温性能好,好的低温流动性、极压抗磨性、水解安定性和对材料的配伍性的特性。但氧化安定性很差,有可能通过植物油改质或加入高效氧化抑制剂来提高,植物油的抗氧化性能。植物油可用做环保型液压油基础油, 相似文献
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稠油由于富含沥青质、胶质等重质组分而具有很高的黏度,给稠油的开采和运输带来了很大的困难。降低稠油黏度进而改善其流动性成为一项十分重要的工作。以植物油、脂肪酸及植物油甲酯为掺稀介质,以塔河油田稠油为研究对象,考察对比了3种不同的掺稀介质对稠油的掺稀降黏效果。研究结果表明,3种掺稀介质对稠油具有良好的掺稀降黏效果,在同一掺稀比下,植物油甲酯对稠油的降黏效果最显著,其次是脂肪酸,再次是植物油。通过斑点试验考察了掺稀介质和稠油的相容性和体系稳定性。结果显示,植物油甲酯与稠油相容性和稳定性最好,脂肪酸和植物油与稠油的相容性和稳定性相对较差。 相似文献
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《Food Control》2017
Edible oil adulteration exposes a high risk to consumer's health and is strictly regulated for food industry. However, efficient and reliable detection of food oil adulteration, particularly for detection of adulteration of commonly vegetable oils (rapeseed oil, peanut oil, sunflower oil, corn oil and olive oil), is not an easy task. In this paper, a high sensitive and reliable method of electron spin resonance (ESR) spin-trapping technique was introduced. α-phenyl-N-tert-butylnitrone (PBN) was used as spin trap to discriminate the adulteration of qualified vegetable oils, very intense spectra revealing a hyperfine splitting made up of a triplet of doublets (aN = 14.88G and aH = 1.81G) were applied. The initial signal intensities and increasing rate of the UFO were both higher than the qualified oils. All five qualified vegetable oils with higher adulteration proportions had higher initial signal intensities detected at 2 min, which could be assigned to thermal oxidation products that were present in adulterated oils. Initial signal intensities and adulteration proportions (<20%) were treated for quantitative analysis by linear regression. The simple linear equations were built and the coefficients of determination (R2) were all above 0.94 except PO (0.8920). Therefore, the proposed ESR spin-trapping technique could be applied to discriminate adulteration of qualified vegetable oils. 相似文献
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稠油由于富含沥青质、胶质等重质组分而具有很高的黏度,给稠油的开采和运输带来了很大的困难。降低稠油黏度进而改善其流动性成为一项十分重要的工作。以植物油、脂肪酸及植物油甲酯为掺稀介质,以塔河油田稠油为研究对象,考察对比了3种不同的掺稀介质对稠油的掺稀降黏效果。研究结果表明,3种掺稀介质对稠油具有良好的掺稀降黏效果,在同一掺稀比下,植物油甲酯对稠油的降黏效果最显著,其次是脂肪酸,再次是植物油。通过斑点试验考察了掺稀介质和稠油的相容性和体系稳定性。结果显示,植物油甲酯与稠油相容性和稳定性最好,脂肪酸和植物油与稠油的相容性和稳定性相对较差。 相似文献
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可生物降解液压油的研究现状 总被引:1,自引:0,他引:1
概述了可生物降解润滑油发展状况,介绍了植物油、合成酯、聚乙二醇等可生物降解液压油基础油,以及极压/抗磨剂、抗氧剂、防腐防锈剂等添加剂对生物降解性的影响和CEC L-33-A-93生物降解评定方法。提出以我国特有植物油资源为基础油,优选出合适配方体系是我国可生物降解液压油研制开发的途径。 相似文献
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V. Mahto 《Petroleum Science and Technology》2013,31(21):2237-2243
The differential pipe sticking is one of the major drilling problems faced by the driller with water-drilling fluids when it is developed using bentonite clay. In this work, the effect of a vegetable oil on the water-based drilling fluids was studied using Fann VG meter, ñubricity tester, and stickance tester for the control of this problem. The vegetable oil selected in this study is linseed oil as it is eco-friendly. The suitability of linseed oil in drilling fluid formulation is compared with the non–vegetable oil–based lubricant The experimental investigation furnishes that with the use of linseed oil, drilling fluid is able to maintain the rheological properties and control the filtration loss. The sticking tendency of the drilling fluid is also reduced significantly which shows that it may be quite suitable for the prevention of differential pipe sticking problems caused by water-based drilling fluids. It has been also observed that linseed oil has shown better result than the non vegetable oil–based lubricant and it is economical. 相似文献