英语翻译Figure 2.4 Phase diagrams of trisiloxane surfactants,BE6 BE8 and BE12\x05uncertain.Between 20 and 40 wt%,multilamellar vesicles were found.Particles smaller than 0.5 um,believed to vesicles,dominate in conncentration below 10 wt%.BE12 fro
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英语翻译Figure 2.4 Phase diagrams of trisiloxane surfactants,BE6 BE8 and BE12\x05uncertain.Between 20 and 40 wt%,multilamellar vesicles were found.Particles smaller than 0.5 um,believed to vesicles,dominate in conncentration below 10 wt%.BE12 fro
英语翻译
Figure 2.4 Phase diagrams of trisiloxane surfactants,BE6 BE8 and BE12
\x05uncertain.Between 20 and 40 wt%,multilamellar vesicles were found.Particles smaller than 0.5 um,believed to vesicles,dominate in conncentration below 10 wt%.BE12 froms clear isotropic solutions in water at all concentraions between 10 and 43℃.Along the concentration axis,the microstuctures evolve from small spherical micelles to entangled worm-like micelles,branched interconnected worm-like micelles,and to a random bilayer structure,The speading rate of BE8 was found to depend both on the surfer energy and surfactant concentration with a maximum 90 ㎜2/s near 0.4 wt% on a surface with a water contact angle of 70°.70 BE8 changed its spreading behavior from partial wetting to fast-spreading of thick fimls at 0.05wt%.78,79 The transition concentration called the critical wetting concentration (CWC) at which fast spreading starts was found to be independent of the surface energy for all superwetters.
\x05While the bulk microstructure and spreading dynamics measurements elucidate important aspects of superwetting,one missing piece is the self-associating structure of the trisiloxane surfactants at interface.The nature of the surfactant structure at interface is critical to the understanding of the superwetting phenomenon.Garoff et al.80,81,82 demonstrated the importance of surfactant adsorption and orentation near (and even just beyond) the liquid contact line.Self-assembling structures of several ionic surfactants on hydrophilic surfaces were probed by AFM,ex-situ scanning ellipsometry and in-situ X-ray reflectometry.A small molecule,tricresyl phosphate (TCP),was also studied by Shanahan et al.to show the importance of molecular orientation near the spreading edge.83All these studies alluded to the importance of the self-associating structure of the trisiloxane surfactants at interface.
\x05Atomic force microscopy (AFM) has gain tremendos prominence in the last decades as an imagine technique for the study of soft materials,such as organic crystals,84,85 organic thin films,86,87 and liquid crystals in the smectic phases.88 Soft-contact AFM technique images surface aggregates of surfactans such as cetyltrimethylammonium bromide (CTAB),sodium dodecyl sulfate (SDS) ,and poly(oxyethylene)n-dodecyl ether(C12En) by maintaining an image force as small as 10-12N.89,90,91 Using this technique,we found a surface phase transition for C12E5 at near its cloud point on mica that was attributed to the temperature-induced dehydration of the polyoxyethylene headgroup.92 In this part of the research,we will present AFM imaging and force measurement results on the self-associating structure of the trisiloxane surfactant M(D′EnOH)M,or BEn(n=6,8,12) at the solid/liquid interface.Substrates of different atomic structure and hydrophobicity were used:crystalline and hydrophilic.
英语翻译Figure 2.4 Phase diagrams of trisiloxane surfactants,BE6 BE8 and BE12\x05uncertain.Between 20 and 40 wt%,multilamellar vesicles were found.Particles smaller than 0.5 um,believed to vesicles,dominate in conncentration below 10 wt%.BE12 fro
图 2.4 相图铺展表面活性剂、 BE6 BE8 和 BE12
不确定.20 和 40%≤ 之间发现了 multilamellar 水泡.嗯,颗粒小于 0.5 相信水泡,主宰在低于 10%≤ conncentration.BE12 统计清除各向同性的解决方案,在 10 和 43℃ 之间的所有测定水中.沿轴浓度,纠缠蠕虫胶束,分支互连蠕虫胶束,小球的胶束从进化的 microstuctures 和随机的双层结构,发现 BE8 听说率取决于双方对冲浪者能和 70 °.70 BE8 表面与水接触角最大的 90 ㎜2/s 附近 0.4%≤ 表面活性剂浓度改变及其传播的行为从局部润湿,传播速度最快的厚 fimls 在 0.05wt%.78,79 过渡浓度被称为临界润湿浓度 (化学武器公约 》) 的快速传播开始被认为是独立的表面能为所有 superwetters.
虽然大容量微观结构和传播动态测量澄清 superwetting,one 失落的重要方面是一角的在界面的铺展表面活性剂的 self-associating 结构.在界面的表面活性剂结构的性质是关键 superwetting 现象的认识.加罗夫 et al.80,81,82 证明表面活性剂吸附和取向附近 (和甚至只是超越) 的重要性液体接触线.几种离子表面活性剂在亲水表面上的自我组装结构的原子力显微镜、 迁地扫描椭圆偏振和原位 x 射线反射死刑.小分子,磷酸三甲酚酯 (TCP),还研究了由沙纳汉 et al 显示界面铺展表面活性剂的 self-associating 结构的重要性提到这些研究的传播 edge.83All 附近的分子取向的重要性.
原子力显微镜 (AFM) 已近数十年来,作为想象技术研究的柔软的材料,如有机晶体、 84、 85 有机薄膜增益 tremendos 突出、 86、 87 和液态晶体中的 smectic phases.88 软接触原子力显微镜技术图像表面集合如溴化 (CTAB)、 十二烷基硫酸钠 (SDS) 和通过保持图像聚 (oxyethylene) n-十二烷基 ether(C12En) surfactans 的力小,10-12N.8990,91 使用这种技术,我们发现表面相变 C12E5 在其云点附近是归因于在这部分研究聚氧乙烯 headgroup.92 低温诱导脱水云母、 我们将目前原子力显微镜成像和力固液界面的 BEn(n=6,8,12) 或 self-associating 结构的 M 铺展表面活性剂 (D′EnOH) M,测量结果.使用了不同的原子结构和疏水性的衬底: 晶与亲水.