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

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 (SiO) 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 ≈ M, close to that of the adsorption rate constant.

Protein Corona Composition of Silica Nanoparticles in Complex Media: Nanoparticle Size does not Matter

“…This effect is well known for polymers [43], and can be explained by the fact that larger (bio)polymers have also a larger number of putative anchoring points, and thus higher affinity constants. Indeed, this larger number of anchoring points makes the adsorption almost irreversible and larger (bio)polymers progressively replace smaller ones that adsorb, but also desorb, more quickly [72,73].…”

Recent Progress in Aggregation-Induced Emission-Active Organic Small Molecule Inorganic Nanocomposites

“…聚合物的吸附-脱附是许多工业和生物医学应用的 基础. 邱东等 [114] 发展了基于 AIE 的聚合物脱附动力学 的原位监测方法, 以聚环氧乙烷和二氧化硅为模型体 系, 以化合物 52 为探针, 对脱附过程中的荧光发射强度 进行监测, 研究了聚环氧乙烷在 SiO 2 上的脱附动力学. 结果表明, 聚环氧乙烷的脱附速率常数随其分子量的增 加而减小, 与聚合物的吸附速率常数相近.…”