Kinetics of Polymer Desorption from Colloids Probed by Aggregation-Induced Emission Fluorophore

Feng Yan; Zhichao Zhu; Xiaobiao Dong; Chao Wang; Xiaohui Meng; Yue Xie; Guanxin Zhang; Dong Qiu

doi:10.1021/acs.langmuir.7b04215

Kinetics of Polymer Desorption from Colloids Probed by Aggregation-Induced Emission Fluorophore

Langmuir. 2018 Jun 19;34(24):7006-7010. doi: 10.1021/acs.langmuir.7b04215. Epub 2018 Feb 11.

Authors

Feng Yan^{1

2}, Zhichao Zhu¹, Xiaobiao Dong^{1

2}, Chao Wang^{1

2}, Xiaohui Meng¹, Yue Xie¹, Guanxin Zhang¹, Dong Qiu^{1

2}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences , Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190 , China.
² University of Chinese Academy of Sciences , Beijing 100190 , China.

PMID: 29360372
DOI: 10.1021/acs.langmuir.7b04215

Abstract

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) and colloidal silica (SiO₂) were used as a model system. It was found that the aggregation-induced emission 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 the polymer desorption rate constant decreased with the increasing molecular weight, which could be described by a power law function k_d ≈ M^-0.28, close to that of the adsorption rate constant.

Publication types

Research Support, Non-U.S. Gov't