Study of the long-range hydrophobic attraction in concentrated salt solutions and its implications for electrostatic models
Study of the long-range hydrophobic attraction in concentrated salt solutions and its implications for electrostatic models
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DOI：
10.1021/la970591f
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发表时间：
1998-06-09
期刊：
影响因子：
3.9
通讯作者：
Pashley, RM
中科院分区：
文献类型：
--
作者：
Craig, VSJ;Ninham, BW;Pashley, RM
对低浓度可溶性阳离子表面活性剂十六烷基三甲基溴化铵中二氧化硅表面之间相互作用的直接力测量揭示了延伸至 100 nm 的长程强吸引力疏水力。在 0.1 M 电解质中观察到氯化十六烷基吡啶的类似力表明，在浓缩电解质存在的情况下，疏水性吸引力并未减弱。这些结果与长程疏水吸引力的其他研究相关联进行了讨论，并得出静电双层力无法解释这些吸引力的结论。
Direct force measurements of the interaction between silica surfaces in low concentrations of the soluble cationic surfactant cetyltrimethylammonium bromide reveal a long-range strongly attractive hydrophobic force extending out to 100 nm. Similar forces observed for cetylpyridinium chloride in 0.1 M electrolyte demonstrate that the hydrophobic attraction is undiminished in the presence of concentrated electrolyte. These results are discussed in relation to other investigations of the long-range hydrophobic attraction and lead to the conclusion that electrostatic double layer forces are unable to account for these attractive forces.