Affiliation:
1. Institute of Critical Materials for Integrated Circuits Shenzhen Polytechnic Shenzhen China
2. Shenzhen Grubbs Institute and Department of Chemistry Southern University of Science and Technology Shenzhen China
3. Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen China
Abstract
AbstractThe precipitate and the coacervate are two aggregated states in the polyelectrolyte complexes (PECs). The precipitate‐to‐coacervate transition and glass transition in PECs have been widely reported in the past. In many cases, the two phenomena are studied independently, although both of them are apparently affected by water and small ions. Here, utilizing a PEC system consisting of poly(acrylic acid) (PAA) and a cationic bolaamphiphile (DBON), we explore the states of PECs as a function of salt, temperature, and the molecular weight of PAAs. By a combination of microscopic observation, time‐resolved fluorescence measurements, and differential scanning calorimetry, we identify salt/temperature driven precipitate‐to‐coacervate transitions of the complexes. The thermally induced morphology transformation from the precipitate to coacervate occurs around the glass transition temperature, indicating a strong correlation between the two processes. As the molecular weight of the PAA increases, the thermal transition temperature becomes higher. This finding offers new insights on the mechanistic interactions that dictate the aggregated states of PECs. Based on the photothermal effect of DBON, we also develop a UV light‐induced strategy to mediate the precipitate‐to‐coacervate transition, providing a fantastic platform to create functional PEC materials.
Funder
National Natural Science Foundation of China
Subject
General Medicine,General Chemistry
Cited by
1 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献