Kinetics of Polymer Desorption from Colloid Probed by Aggregation-Induced Emission Fluorophore
Feng Yan, Zhichao Zhu, Xiaobiao Dong, Chao Wang, Xiaohui Meng, Yue Xie, Guanxin Zhang, Dong Qiu*
Langmuir 2018, 34, 7006.
Polymer adsorption and desorption are fundamental in many industrial and biomedical applications. Here we introduce a new method to monitor the polymer desorption kinetics in situ, based on the behavior of aggregation induced emission. Poly(ethylene oxide) (PEO) and colloidal silica (SiO2) were used as a model system. It was found that the AIE method could be successfully used to determine the polymer desorption kinetics and the polymer desorption followed the first order kinetics. It was also found that polymer desorption rate constant decreased with the increasing molecular weight, which could be described by a power law function kd~M-0.28, close to that of the adsorption rate constant.