State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing 100029, China.
Anal Chem. 2017 Nov 21;89(22):12472-12479. doi: 10.1021/acs.analchem.7b03575. Epub 2017 Nov 8.
It is a considerable challenge to realize 3D fluorescence quantification of macrodispersion of clay fillers in a polymer matrix mainly owing to quenching of light emission in the solid state. Herein, a strong light emission is generated within the interlaminated clay as a result of a cation-π interaction between cationic surfactant and fluorescent polycyclic aromatic hydrocarbon when they are cointercalated into clay. Confocal laser scanning microscopy (CLSM) is applied for 3D imaging of macrodispersion of the fluorescence-labeled clay fillers in a silicone rubber matrix. More importantly, the quantification of macrodispersion of clay fillers in the overall polymer composite is established by a statistical model. The proposed method fills in an important gap in the standard for macrodispersion quantification of inorganic fillers in polymer composites.
实现聚合物基体中粘土填料宏观分散的 3D 荧光定量是一项重大挑战，这主要是由于固态下的光发射猝灭。在此，当阳离子表面活性剂和荧光多环芳烃共嵌入粘土时，在层间粘土内产生强的光发射，这是由于阳离子-π相互作用的结果。共焦激光扫描显微镜（CLSM）用于对硅橡胶基体中荧光标记的粘土填料的宏观分散进行 3D 成像。更重要的是，通过统计模型建立了对整个聚合物复合材料中粘土填料宏观分散的定量方法。该方法填补了聚合物复合材料中无机填料宏观分散定量标准的一个重要空白。
