目的使用传统指标和FT-IR技术评价乳剂稳定性。方法通过两步乳化法制备O/W乳剂,以平均粒径、离心稳定常数及表面张力3个指标对乳剂进行表征。用浸渍法分别测定水相、油相和乳剂的傅里叶变换红外光谱(FT-IR)图,再用软件origin 7.5对水相...目的使用传统指标和FT-IR技术评价乳剂稳定性。方法通过两步乳化法制备O/W乳剂,以平均粒径、离心稳定常数及表面张力3个指标对乳剂进行表征。用浸渍法分别测定水相、油相和乳剂的傅里叶变换红外光谱(FT-IR)图,再用软件origin 7.5对水相和乳剂的羟基峰进行去卷积,根据最小二乘法拟合出组成羟基峰的高斯曲线。结果 2个乳剂的平均粒径分别为155.9 nm和138.5 nm,离心稳定常数分别为0.377和0.561,表面张力分别为54.22 m N/m和64.80 m N/m;制成乳剂后,FT-IR图中油相的信号峰几乎完全消失,而水相和乳剂的FT-IR图中,羟基峰均由6条高斯曲线组成,乳剂中5条高斯曲线的峰位对比于水相都发生了蓝移。结论定量的传统指标和定性的FT-IR技术相结合,可以更好地评价乳剂的稳定性。展开更多
Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(M...Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(MNE) and microemulsion(ME).The lubricating properties of O/W emulsions with low oil concentration were investigated using the tribological testers and the thin film interferometry based on the relative optical interference intensity method.The tribological test results under boundary lubrication show that the friction coefficient and the total losing weight can be clearly seen:CE < MNE < ME.The lubricating film thicknesses under elastohydrodynamic lubrication and thin film lubrication show that a relationship of the film formation abilities:CE > MNE > ME.Competitive wetting behavior of water and oil on solid surface was confirmed to play an important role in the film formation and tribological behaviors of O/W emulsion.展开更多
简述了油膜附水滴(oils on water,OoW)切削液的冷却润滑原理。通过干切削、常规浇注乳化液和OoW切削液三种冷却润滑方式,切削40Cr合金结构钢的切削力以及工件表面粗糙度的对比试验,研究OoW切削液的冷却润滑性能。试验结果表明,OoW切削...简述了油膜附水滴(oils on water,OoW)切削液的冷却润滑原理。通过干切削、常规浇注乳化液和OoW切削液三种冷却润滑方式,切削40Cr合金结构钢的切削力以及工件表面粗糙度的对比试验,研究OoW切削液的冷却润滑性能。试验结果表明,OoW切削液能有效减小切削力和表面粗糙度值。展开更多
文摘目的使用传统指标和FT-IR技术评价乳剂稳定性。方法通过两步乳化法制备O/W乳剂,以平均粒径、离心稳定常数及表面张力3个指标对乳剂进行表征。用浸渍法分别测定水相、油相和乳剂的傅里叶变换红外光谱(FT-IR)图,再用软件origin 7.5对水相和乳剂的羟基峰进行去卷积,根据最小二乘法拟合出组成羟基峰的高斯曲线。结果 2个乳剂的平均粒径分别为155.9 nm和138.5 nm,离心稳定常数分别为0.377和0.561,表面张力分别为54.22 m N/m和64.80 m N/m;制成乳剂后,FT-IR图中油相的信号峰几乎完全消失,而水相和乳剂的FT-IR图中,羟基峰均由6条高斯曲线组成,乳剂中5条高斯曲线的峰位对比于水相都发生了蓝移。结论定量的传统指标和定性的FT-IR技术相结合,可以更好地评价乳剂的稳定性。
基金supported by the Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20100007120010)the Tribology Science Fund of State Key Laboratory of Tribology (Grant No. SKLTKF11A05)Science Foundation of China University of Petroleum,Beijing (GrantNo. KYJJ2012-04-17)
文摘Oil-in-water(O/W) emulsions are widely used in metal working such as hot rolling and cutting.Three kinds of O/W emulsions with low oil concentration were prepared which include conventional emulsion(CE),miniemulsion(MNE) and microemulsion(ME).The lubricating properties of O/W emulsions with low oil concentration were investigated using the tribological testers and the thin film interferometry based on the relative optical interference intensity method.The tribological test results under boundary lubrication show that the friction coefficient and the total losing weight can be clearly seen:CE < MNE < ME.The lubricating film thicknesses under elastohydrodynamic lubrication and thin film lubrication show that a relationship of the film formation abilities:CE > MNE > ME.Competitive wetting behavior of water and oil on solid surface was confirmed to play an important role in the film formation and tribological behaviors of O/W emulsion.
