Low-Surface Energy Surfactants with Branched Hydrocarbon Architectures
Low-Surface Energy Surfactants with Branched Hydrocarbon Architectures
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DOI：
10.1021/la500332s
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发表时间：
2014-04-01
期刊：
影响因子：
3.9
通讯作者：
Eastoe, Julian
中科院分区：
文献类型：
--
作者：
Alexander, Shirin;Smith, Gregory N.;Eastoe, Julian
表面张力测定和小角中子散射已被用来表征一类新型低表面能表面活性剂（LSES），即“刺猬”表面活性剂。这些表面活性剂基于高度支化的碳氢化合物 (HC) 链，可替代对环境有害的氟碳表面活性剂和聚合物。张力分析表明，尾部和头基的细微结构修饰对限制临界胶束浓度下的表面张力γ(cmc)产生显着影响：较高水平的支化和增加的抗衡离子尺寸促进HC表面活性剂的表面张力有效降低至较低值（γ(cmc)类似于24 mN·m(-1)）。这些 LSES 呈现出一类潜在非常重要的新型材料，它们在水溶液中形成层状聚集体，与稀释无关。
Surface tensiometry and small-angle neutron scattering have been used to characterize a new class of low-surface energy surfactants (LSESs), "hedgehog" surfactants. These surfactants are based on highly branched hydrocarbon (HC) chains as replacements for environmentally hazardous fluorocarbon surfactants and polymers. Tensiometric analyses indicate that a subtle structural modification in the tails and headgroup results in significant effects on limiting surface tensions gamma(cmc) at the critical micelle concentration: a higher level of branching and an increased counterion size promote an effective reduction of surface tension to low values for HC surfactants (gamma(cmc) similar to 24 mN m(-1)). These LSESs present a new class of potentially very important materials, which form lamellar aggregates in aqueous solutions independent of dilution.