共查询到18条相似文献,搜索用时 93 毫秒
1.
2.
3.
选用菜籽油、失水山梨糖醇脂肪酸酯(Span 80)、壬基酚聚氧乙烯醚(TX-7)、正丁醇制备W/O型微乳液,并将其作为微反应器原位合成CaCO3微纳米粒子。对CaCO3粒子形貌的表征表明,随含水量增加,CaCO3粒子由球形转变为梭形薄片状,CaCO3粒子尺寸也可受含水量控制。通过四球摩擦磨损试验机评价CaCO3微纳米流体的摩擦学性能,结果表明,该微乳液体系相较于基础油的摩擦因数降低了约55.74%,CaCO3粒子使微乳液PB值提高了约10.88%,摩擦面粗糙度降低了约16.01%。在摩擦过程中,胶团在表面活性剂的作用下平行吸附于摩擦面且易于剪切,实现优异的减摩效果;梭形薄片状的CaCO3微纳米粒子可以抑制表面微凸体之间的直接接触,减少黏着磨损与磨粒磨损,从而发挥极压作用并显著改善表面质量。 相似文献
4.
5.
研究铝合金微乳化加工润滑液的组成,探讨表面活性剂、助表面活性剂对乳液稳定性的影响以及润滑添加剂对微乳液润滑性能的影响。通过四球机、Timken试验机对研制的微乳化加工润滑液进行检测,结果表明该微乳液具有较好的润滑性能。腐蚀试验证明,研制的微乳化液对铝及铝合金无腐蚀,能满足铝合金切削润滑的需要。 相似文献
6.
本文从微乳化液形成机理入手,分析了解决乳液腐败问题的对策,把生物稳定材料引入配方,制成了生物稳定的微乳化液,使水溶性切削液实现了多功能,长寿命,高效益。 相似文献
7.
8.
9.
10.
铜缓蚀剂研究中铜的测定 总被引:1,自引:0,他引:1
往电厂锅炉凝汽器水中添加铜缓蚀剂,以防止或减轻凝汽器中铜件的腐蚀,意义重大。但在研究缓蚀剂的作用原理并筛选缓蚀剂时,存在着铜离子浓度“测不准”的问题,本文找出了“测不准”原因,建立了可靠的铜缓蚀剂研究职铜离子的测定方法,使缓蚀剂研究能进行,也为同类分析方法提供经验。 相似文献
11.
12.
A. Azarpour S. Sharifi M. Khzaei-Nezhad 《Optoelectronics, Instrumentation and Data Processing》2018,54(1):32-38
Molecules with strong two-photon absorption have applications in photodynamic therapy and photonic devices. The effect of polarity of the medium and microemulsion on nonlinear optical properties of saffron is studied by the Z-scan technique with a CW laser at the 532 nm wavelength. The values of the nonlinear refractive index and two-photon absorption of saffron are found to increase with a decrease in the medium polarity and with an increase in the droplet size in the microemulsion. 相似文献
13.
14.
在TritonX-100/C10H21OH/H2O微乳液中合成了LaPO4纳米粒子,其粒径约5 nm。用高速环块摩擦磨损试验机考察了LaPO4纳米粒子在铝合金表面的摩擦学性能,并用X射线光电子能谱对其摩擦化学作用机制进行了研究。研究结果表明,LaPO4纳米粒子能提高微乳液的润滑性能,其在摩擦过程中,发生了摩擦化学反应,在摩擦表面生成了由LaPO4、La2O3、A lPO4等组成的化学反应膜。同时,微乳液中的有机分子吸附在铝合金表面构成了有机吸附膜,也起到了减摩抗磨的作用。 相似文献
15.
本文介绍了一种新型微乳切削液的性能,特点及研究应用情况,指出了这一类型产品的优越性及发展前景,同时介绍了微乳切削液的制备过程和方法及微乳切削液性能的评定方法和测试,应用结果。众多数据表明本文介绍的微乳化切削液是透明稳定的,且具有优良的安贮性、消泡性、防腐性以及防锈性,该产品不仅可用于一般的金属加工,还可在金属精密加工中广泛应用。 相似文献
16.
Zinc oxide nanoparticles (ZnO NPs) have demonstrated the ability to improve lubrication and thermal conductivity and are promising metalworking lubricant and coolant additives due to their low cost compared to other NPs. Though nanomaterials are a focus of research due to their potential to enable advanced technologies, little is known about their effects on the environment and human health. This research investigates two main characteristics of ZnO metalworking nanofluids (MWnF). First, the stability of ZnO NPs (20 nm) is investigated using dynamic light scattering (DLS) for mixtures of a microemulsion (TRIM MicroSol 585XT) and several dispersants, all of which are commercially available. Second, toxicological assessments using a zebrafish assay method are conducted to survey the effect of ZnO NPs on MWnF safety. The research revealed that none of the dispersants enhanced the stability of ZnO NPs more than the prepared microemulsion alone. The work also revealed that ZnO MWnF had a significantly higher toxicity than the prepared microemulsion. This demonstrates the need for precautionary development of metalworking nanofluids. 相似文献
17.
Appropriate surfactants and co‐surfactants were chosen to prepare a microemulsion system with lubricant base oil as the oil phase. The phase behaviour of the microemulsion at different temperatures and at different oil/water mass ratios was assessed on the basis of conductivity measurements. Microemulsions and a bi‐continuous microstructure were obtained when the oil/water mass ratio was below 0.33. An analysis of the conductivity behaviour of the microemulsions revealed that different conductive mechanisms are operative at different water contents. Activation energies (ΔE) were determined. The results showed that ΔE increases with increasing water content. The data and the derived relationship provided a basis for preparing metalworking microemulsions. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
18.
极压微乳化切削液的研制与应用 总被引:3,自引:1,他引:3
按照微乳液调配理论,研制了一种由表面活性剂、润滑剂、防锈剂、稳定剂、低粘度矿物油、杀菌剂和水等组成的透明极压微乳化切削液,详细探讨了防锈剂、油性剂、极压剂、表面活性剂等添加剂的选择;讨论了这种微乳化切削液的性能、特点及应用情况。应用结果表明:研制的极压微乳化切削液是透明稳定的,具有优良的防锈性、润滑性、冷却性和清洗性;产品不含对人体有害的氯化石蜡和亚硝酸钠等物质。 相似文献