环境冲击对车载乳胶基质破乳的影响

Influence of Environmental Shock on the Demulsification of Vehicle-mounted Emulsion

针对车载乳胶基质在长途运输后容易出现局部破乳的现象,设计了高低温循环试验和振动试验,模拟其实际使用过程中可能经受的环境冲击,对样品进行加速老化处理,探索环境冲击对样品外观、浸出液的硝酸铵析出量、电导率和乳胶基质黏度的影响规律,得出环境冲击对车载乳胶基质破乳的影响。试验结果表明,温度冲击对试验乳胶基质样品破乳的影响较为明显,其破乳的状态随着温度冲击周期的增加大致分为3个阶段,经历4个温度冲击周期后即出现破乳;而振动冲击对乳胶基质样品破乳的影响较小。但在温度和振动冲击耦合作用下,乳胶基质样品的不稳定趋势明显加速,对破乳的影响远大于纯温度和纯振动冲击的影响。

To better understand the influence of environmental shock on the demulsification of vehicle-mountedemulsion, high-low temperature cycling test and vibration test were applied to simulate environmental shock for the accele-rated aging treatment of emulsion samples. The influence rules governing the environmental shock on appearance, precipitation quantity of ammonium nitrate, electric conductivity, and viscosity of the emulsion matrix were deduced. Results show,that the temperature shock appears to be a significant factor on the testing sample’s demulsification,which includes approximately three stages with the increase of temperature shock periods and would happen after four high-low temperature cycles,whereas vibration shock seems to be less effective on the demulsification. However, under the com-bined temperature-vibration shock condition, the unstable tendency of emulsion would be accelerated, which far exceeds the single influence brought in by either temperature shock or vibration shock.