Citation: Han Guo-Bin, Wu Jin-Tian, Xu Xiao-Ming. Influence of TBP on the Surface Rheological Properties of C12E8 Studied by Surface Wave Method[J]. Acta Physico-Chimica Sinica, 2000, 16(06): 507-510. doi: 10.3866/PKU.WHXB20000606
表面波技术研究TBP对C12E8表面流变性质的影响
利用表面波技术研究消泡剂TBP对起泡剂C12E8 表面流变性质的影响 ,阐述泡沫的排液过程中液膜变形所产生的表面张力梯度修复机理以及液膜强度与表面膨胀模量、表面膨胀弹性和表面膨胀粘度的关系 ,并且探讨了消泡剂TBP的消泡机理. 实验结果表明 ,当起泡剂C12E8 浓度小于cmc时 ,TBP能大幅度地降低C12E8 的表面膨胀模量、表面膨胀弹性和表面膨胀粘度 ,其中对表面膨胀弹性的影响大于对表面膨胀粘度的影响 ,并且增加了C12E8 的表面粘度相角.但并没有改变C12E8 水溶液的表面粘弹性质.
English
Influence of TBP on the Surface Rheological Properties of C12E8 Studied by Surface Wave Method
The influence of antifoaming agent TBP on the surface adsorption and on the surface rheological properties of foaming agent C12E8 is investigated by the damped longitudinal wave method, and the antifoaming mechanism of the antifoaming agent TBP on C12E8 is explored in this paper. The experimental results show that while the concentration of foaming agent C12E8 is smaller than cmc and at ω=6.28 rad•s-1, the decreases of surface dilational modulus, surface dilational elasticity, surface dilational viscosity and the increases of the phase angle when the concentration of TBP increase for the C12E8+TBP aqueous solution (C12E8=0.074 mmol•L-1) have been related to the diffusional exchange between surface and bulk and to the Maran ni effect, which depends on the restored mechanism of surface tension gradient due to the stretched surface. This has been related to the mechanism of antifoaming action.
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