Kinetics of Polymer Desorption from Colloids Probed by Aggregation-Induced Emission Fluorophore.
Kinetics of Polymer Desorption from Colloids Probed by Aggregation-Induced Emission Fluorophore.
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通过聚集诱导发射荧光团探测胶体中聚合物解吸的动力学。
DOI：
10.1021/acs.langmuir.7b04215
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
D. Qiu
中科院分区：
文献类型：
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作者：
Fengyuan Yan;Zhichao Zhu;Xiaobiao Dong;Chao Wang;Xiaohui Meng;Y. Xie;Guanxin Zhang;D. Qiu
聚合物吸附和解吸在许多工业和生物医学应用中是基本的。在这里，我们介绍了一种新的方法来监测聚合物的解吸动力学原位聚集诱导发射的行为的基础上。聚（环氧乙烷）和胶体二氧化硅（SiO2）被用作模型系统。结果表明，聚集诱导发射法可以成功地用于测定聚合物的脱附动力学，聚合物的脱附符合一级动力学。聚合物的脱附速率常数随分子量的增加而减小，符合幂律函数kd = 0.28，与吸附速率常数接近。
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 kd ≈ M-0.28, close to that of the adsorption rate constant.