CAJ | 학술논문

采用耗散型石英晶体微天平（QCM-D）原位研究了不同浓度NaCl溶液对沥青质的脱附效率，并基于Voigt粘弹性模型对石英晶体表面的吸附质量变化进行了拟合。结合紫外可见光吸收光谱、原子力显微镜和接触角的测试结果，比较了不同矿化度条件下沥青质的实际脱附效率以及解吸附前后的形貌和润湿性变化。研究结果表明，1000 mg/L NaCl溶液的加入，使沥青质实现少量脱附；而随后加入50 mg/L NaCl溶液，促进了二氧化硅基底表面及吸附层油滴表面的双电层扩张，使其电荷屏蔽作用增强，增大了基底与油滴之间的斥力，最终实现沥青质的大量脱附。
채용모산형석영정체미천평（QCM-D）원위연구료불동농도NaCl용액대력청질적탈부효솔，병기우Voigt점탄성모형대석영정체표면적흡부질량변화진행료의합。결합자외가견광흡수광보、원자력현미경화접촉각적측시결과，비교료불동광화도조건하력청질적실제탈부효솔이급해흡부전후적형모화윤습성변화。연구결과표명，1000 mg/L NaCl용액적가입，사력청질실현소량탈부；이수후가입50 mg/L NaCl용액，촉진료이양화규기저표면급흡부층유적표면적쌍전층확장，사기전하병폐작용증강，증대료기저여유적지간적척력，최종실현력청질적대량탈부。
The effect of NaCl solutions of different concentrations on the asphaltene desorption was investigated by dissipative quartz crystal microbalance (QCM-D) in situ. The adsorbed mass on the silica surface was fitted by Voigt viscoelastic model. Combined with the test results of Ultraviolet (UV) spectroscopy, atomic force microscope and contact angle, the effeciency of asphaltene desorption as well as changes of morphology and wettability were analyzed under different salinity conditions. It showed that there was a slight desorption in the presence of NaCl 1000 mg/L aqueous solution; Whereas the amount of asphaltene desorption was increased after introducing NaCl 50 mg/L aqueous solution. The electrostatic repulsion among oil droplet and silica substrate was increased due to the expansion of double electrode layer, causing the desorption of asphaltenes.