ATTRACTIVE FORCES AT INTERFACES
ATTRACTIVE FORCES AT INTERFACES
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DOI：
10.1021/ie50660a008
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发表时间：
1964-01-01
影响因子：
--
通讯作者：
FOWKES, FM
中科院分区：
文献类型：
--
作者：
FOWKES, FM
基于表面和界面的简单模型的方程被发现对于定量地联系几个以前不相关的表面化学领域是有用的。这些方程引入了一个新的术语--伦敦分散力对表面自由能的贡献（7 d）--并利用该术语精确计算表面张力、界面张力、接触角、浸没热和自由能、吸附热和自由能以及长程货车范德华吸引力。通过实验验证的预测值的准确性导致人们期望不可验证的量的预测，例如固-固界面处的吸引力的大小，是可信的。这种方法应该特别吸引那些需要使用表面化学结果的人，他们更喜欢从现有的值计算而不是进行新的实验测定。它也应该呼吁那些教学表面化学，因为它涉及了第一次几个广泛分离的领域的表面化学。最值得注意的是能够直接从表面张力和接触角的测量计算气体在固体表面上的吸附热和自由能。从7 d的值计算长程货车德瓦耳斯吸引常数A也是非常有吸引力的。
Equations based on a simple model of surfaces and interfaces have been found useful forrelating quantitatively several previously unrelated fields of surface chemistry {10-13). These equations introduce a new term—the London dispersion force contribution to the surface free energy (7d)—and make use of this term for the accurate calculations of surface tension, interfacial tension, contact angles, heats and free energies of immersion, heats and free energies of adsorption, and the long-range van der Waals attractive forces. The accuracy of predictions of values verifiable by experiment lead one to expect that predictions of un-verifiable quantities, such as the magnitude ofattractive forces at solid-solid interfaces, are to be trusted. This approach should appeal especially to those who need to use the results of surface chemistry andwould prefer to calculate from existing values rather than make new experimental determinations. It should also appeal to those teaching surface chemistry in that it relates for the first time several widely separated fields of surface chemistry. Most noteworthy is the ability to calculate heats and free energies of adsorption of gases on solid surfaces directly from measurements of surface tensions and contact angles. The calculation of the long range van der Waals attractive constant, A, from values of 7d is also very attractive.