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单分子膜在水面上的聚集状态与膜分子的亲水基间的静电排斥作用和疏水基间Van der Waals引力的相对大小有关.在293K亚相温度下,2C_nSNa单分子膜聚集行为的电子显微研究表明,n=12时呈非晶性单分子膜;n=14时在较高的表面压下形成结晶性单分子膜;n=16时可在表面压为0mN·m~(-1)的情况下形成结晶性单分子膜.FT-IR和透射电镜对单分子膜聚集结构的解析结果相互一致.本文还讨论了压缩速度对单分子膜π-A等温线的影响.
The aggregation state of monolayers on the surface of water is related to the electrostatic repulsion between the hydrophilic sites of the membrane molecules and the relative gravitation of Van der Waals gravitation between the hydrophobic molecules.At the 293K subphase temperature, Micro-studies have shown that when n = 12 amorphous monolayer; n = 14 at a higher surface pressure to form a crystalline monolayer; n = 16 when the surface pressure of 0mN · m -1 ), Respectively.The results of FT-IR and TEM show that the aggregation of monolayer is consistent with each other.The effect of compression speed on the π-A isotherm of monolayer is also discussed.