Wedel Bastian, Brändel Timo, Bookhold Johannes, Hellweg Thomas
Physical and Biophysical Chemistry, Bielefeld University, Universitätsstraße 25, 33615 Bielefeld, Germany.
ACS Omega. 2017 Jan 10;2(1):84-90. doi: 10.1021/acsomega.6b00424. eCollection 2017 Jan 31.
We investigated the influence of two anionic surfactants, namely, sodium dodecyl sulfate and sodium decyl sulfate, on acrylamide-based microgels consisting of --propylacrylamide. In this context, the main focus was on the influence of surfactant addition on the size of the microgels. The surfactant was added to the reaction mixture before or during the polymerization at different points in time. Microgels were characterized via photon correlation spectroscopy and atomic force microscopy. All results were compared to those for other more common acrylamide-based microgels consisting of isopropylacrylamide and -isopropylmethacrylamide. A significant difference between the three microgels and a strong dependence on the surface activity of the surfactant was found.
我们研究了两种阴离子表面活性剂，即十二烷基硫酸钠和癸基硫酸钠，对由N-丙基丙烯酰胺组成的基于丙烯酰胺的微凝胶的影响。在此背景下，主要关注的是表面活性剂添加对微凝胶尺寸的影响。在聚合反应的不同时间点之前或期间将表面活性剂添加到反应混合物中。通过光子相关光谱法和原子力显微镜对微凝胶进行表征。将所有结果与由异丙基丙烯酰胺和N-异丙基甲基丙烯酰胺组成的其他更常见的基于丙烯酰胺的微凝胶的结果进行比较。发现三种微凝胶之间存在显著差异，并且对表面活性剂的表面活性有很强的依赖性。
