Advancements in Spectroscopic and Microscopic Techniques for Investigating the Adsorption of Conditioning Polymers onto Human Hair
Advancements in Spectroscopic and Microscopic Techniques for Investigating the Adsorption of Conditioning Polymers onto Human Hair
复制标题
研究调理聚合物在人发上吸附的光谱和显微技术的进展
作者：
Js Dalton;K. Hallam;G. C. Allen;P. Heard;N. Elton;Mj Walker;G. Matz
使用环境扫描电子显微镜（ESEM）、X射线光电子能谱（XPS）和二次离子质谱（西姆斯）研究了聚季铵盐-6（Merquat®-100）调理聚合物在漂白人发上的吸附。ESEM不限于高真空环境，因此可以在环境和水合条件下研究毛发形态。XPS给出了头发表面的元素分析，以及表面原子的化学环境信息。西姆斯可以在头发表面产生高分辨率的离子分布图像。XPS和西姆斯都检测到未经处理的漂白头发表面上的碳、氮、氧和硫，所有这些都归因于生物基质。还检测到硅，其存在归因于先前的硅化妆品应用或表面污染。由于头发和Merquat-100的元素组成相似，还研究了用磷标记的聚季铵盐-6阳离子调理聚合物处理头发。XPS的灵敏度为百万分之1000（ppm），不能检测到任何吸附的聚合物中存在的磷，但西姆斯的灵敏度为1-10 ppm，可以获得高分辨率的图像，说明聚合物吸附到头发表面上。
Adsorption of the polyquaternium-6 (Merquat®-100) conditioning polymer onto bleached human hair has been investigated using environmental scanning electron microscopy (ESEM), X-ray photoelectron spectroscopy (XPS), and secondary ion mass spectrometry (SIMS). ESEM is not limited to a high-vacuum environment, and therefore hair morphology could be studied under ambient and hydrated conditions. XPS gave elemental analysis on the surface of the hair, in addition to information on the chemical environment of the surface atoms. SIMS can produce high-resolution ion distribution images on the hair's surface. Both XPS and SIMS detected carbon, nitrogen, oxygen, and sulfur on the surface of the untreated bleached hair, all of which were attributed to the biological matrix. Silicon was also detected and its presence was attributed to either a previous silicone cosmetic application or to surface contamination. Due to the similar elemental composition of hair and Merquat-100, treatment of the hair with a phosphorus-labeled polyquaternium-6 cationic conditioning polymer was also investigated. XPS, with sensitivity of 1000 parts per million (ppm), could not detect phosphorus present from any adsorbed polymer, but SIMS, with 1-10 ppm sensitivity, allowed high-resolution images to be obtained that illustrated the adsorption of polymer onto the hair's surface.