Xi Yunfei, Frost Ray L, He Hongping
Inorganic Materials Research Group, School of Physical and Chemical Sciences, Queensland University of Technology, GPO Box 2434, Brisbane, Qld 4001, Australia.
J Colloid Interface Sci. 2007 Jan 1;305(1):150-8. doi: 10.1016/j.jcis.2006.09.033. Epub 2006 Sep 20.
Surfaces of a Wyoming SWy-2 sodium montmorillonite were modified using microwave radiation through intercalation with the cationic surfactants octadecyl-trimethyl ammonium bromide, dimethyldioctadecylammonium bromide, and methyl-tri-octadecyl ammonium bromide by an ion exchange mechanism. Changes in the surfaces and structure were characterized using X-ray diffraction (XRD), thermal analysis (TG) and infrared (IR) spectroscopy. Different configurations of surfactants within montmorillonite interlayer are proposed based on d(001) basal spacings. A range of surfactant molecular environments within the surface-modified montmorillonite are proposed based upon their thermal decomposition. IR spectroscopy using a smart endurance single bounce diamond attenuated total reflection (ATR) cell has been used to study the changes in the spectra of CH asymmetric and symmetric stretching modes of the surfactants to provide more information of the surfactant molecular configurations.
通过离子交换机制，利用微波辐射，使十八烷基三甲基溴化铵、二甲基二辛基溴化铵和甲基三辛基溴化铵等阳离子表面活性剂插层，对怀俄明州SWy - 2钠蒙脱石的表面进行改性。利用X射线衍射（XRD）、热分析（TG）和红外（IR）光谱对表面和结构的变化进行了表征。基于d(001)基面间距，提出了蒙脱石层间表面活性剂的不同构型。根据表面改性蒙脱石的热分解情况，提出了一系列表面活性剂分子环境。使用智能耐久性单反射金刚石衰减全反射（ATR）池的红外光谱已用于研究表面活性剂CH不对称和对称拉伸模式光谱的变化，以提供更多关于表面活性剂分子构型的信息。
