CAJ | 학술논문

利用悬挂滴方法研究了系列聚氧乙烯失水山梨醇脂肪酸酯(TweenX)在正癸烷-水界面的扩张流变性质.实验结果表明，疏水烷基链长较短的Tween20分子在界面上吸附量较大，分子排列更紧密， Tween40和Tween60具有大致相同的“有效截面积”，导致饱和吸附时界面张力(γcmc)比较接近. TweenX浓度大于临界胶束浓度(cmc)时，由于Tween20分子排列的更加紧密，模量和弹性大于Tween40和Tween60.当TweenX的疏水烷基链长达到一定长度时， TweenX的界面膜性质受疏水链长的影响减弱， Tween40和Tween60的扩张参数相差不大.
이용현괘적방법연구료계렬취양을희실수산리순지방산지(TweenX)재정계완-수계면적확장류변성질.실험결과표명，소수완기련장교단적Tween20분자재계면상흡부량교대，분자배렬경긴밀， Tween40화Tween60구유대치상동적“유효절면적”，도치포화흡부시계면장력(γcmc)비교접근. TweenX농도대우림계효속농도(cmc)시，유우Tween20분자배렬적경가긴밀，모량화탄성대우Tween40화Tween60.당TweenX적소수완기련장체도일정장도시， TweenX적계면막성질수소수련장적영향감약， Tween40화Tween60적확장삼수상차불대.
The dilational rheological properties of a series of polyoxyethylene sorbitan fatty acid surfactants (TweenX) at the decane/water interface have been investigated using the drop shape analysis method. The experiment results showed that larger quantities of the Tween20 molecules with shorter hydrophobic chain lengths were adsorbed at the interface because they could arrange more closely. Tween40 and Tween60 molecules had similar“actual cross-sectional areas”, which meant that their interfacial tensions were also similar at the critical micel e concentration (γcmc). Furthermore, when the bulk concentration exceeded the critical micel e concentration (cmc), the modulus and elasticity of Tween20 were larger than those of Tween40 and Tween60. When the hydrophobic alkyl chain of TweenX reached a certain length, the interfacial film properties of TweenX affected by the hydrophobic chain length decreased, which led to similar dilational parameters.