The strong interaction between poly

The strong interaction between polyamines and anionic surfactants results in pronounced adsorption at
the air–water interface and can lead to the formation of layered surface structures. The transition from
monolayer adsorption to more complex surface structures depends upon solution pH, and the structure
and molecular weight of the polyamine.
The effects of manipulating the polyamine molecular weight and structure on the adsorption of the
anionic surfactant sodium dodecyl sulphate at the air–water interface are investigated using neutron
reflectivity and surface tension, for the biogenic amines putrescine, spermidine and spermine.
The results show how changing the number of amine groups and the spacing between the amine
groups impacts upon the surface adsorption. At lower pH, 3–7, and for the higher molecular weight polyamines, spermidine and spermine, ordered multilayer structures are observed. For putrescine at all pH
and for spermidine and spermine at high pH, monolayer adsorption with enhanced surfactant adsorption
compared to the pure surfactant is observed. The data for the biogenic amines, when compared with similar data for the polyamines ethylenediamine, diethylenetriamine and triethylenetetramine, indicate that
the spacing between amines groups is more optimal for the formation of ordered surface multilayer
structures.
 2014 Elsevier Inc. All rights reserved.

結果 (中文) 1:

多胺与阴离子表面活性剂之间的强相互作用结果明显吸附在空气-水界面和可以导致形成的层状表面结构。从过渡单分子层吸附到更复杂的表面结构取决于溶液的 ph 值和结构和多胺的相对分子质量。操纵的多胺分子量和结构上吸附的影响利用中子研究了阴离子表面活性剂十二烷基硫酸钠在空气 — — 水界面反射率和表面张力，为生物胺腐胺、 精脒、 精胺。结果表明胺组和胺之间的间距的变化如何数目分组后的表面吸附的影响。在低 ph 值，3-7，和较高的分子量多胺、 亚精胺、 精胺，下令多层结构观察。为在所有 pH 腐胺和亚精胺、 精胺 ph 值高时，以单分子层吸附与增强表面活性剂吸附相比纯观察表面活性剂。生物胺时相比，多胺乙二胺、 二乙烯三胺、 三乙烯四胺，类似数据, 的数据表明，胺组之间的间距是更优序表面多层膜的形成结构。2014 爱思唯尔公司保留所有权利。

結果 (中文) 3:

在明显的吸附在多胺和阴离子表面活性剂的结果之间的强相互作用空气-水界面，可导致层状结构的形成。从过渡单层吸附更复杂的表面结构取决于溶液的PH值，和结构多胺的分子量。操作多胺分子量和结构对吸附的影响用中子研究了空气-水界面的阴离子表面活性剂十二烷基硫酸钠反射率和表面张力的生物胺，腐胺、亚精胺和精胺。结果表明，改变胺基团的数目和胺之间的间距基团对表面吸附的影响。在较低的pH值，3–7，和较高分子量的多胺、亚精胺和精胺，有序多层结构的观察。腐胺在所有pH值而在高pH值的亚精胺和精胺，具有增强的表面活性剂吸附层观察到纯表面活性剂相比。对生物胺的资料，对多胺乙二胺类似的数据相比，二乙烯三胺和三乙烯四胺，表明胺组之间的间距更为优化的有序表面多层的形成结构。2014 Elsevier公司保留所有权利。