The correlation between thermally induced precipitate-to-coacervate transition and glass transition in a polyelectrolyte-bolaamphiphile complex

Liu, Xiaoqing1; Shi, Zhihui2,3; Yu, Feng2,3; Teng, Chao1; Zhang, Chen1; Chen, Zhong-Ren2,3,4

2023-05-01

10.1002/agt2.363

AGGREGATE   影响因子和分区

2692-4560

The 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.

aggregation-induced emission coacervate glass transition polyelectrolyte complex precipitate

ESCI ; EI

英语

通讯

State Key Research Development Programme of China[2021YFB3800702] ; National Natural Science Foundation of China[21902073] ; Shenzhen Science and Technology Innovation Committee[JSGG20210629144802007] ; Post-Doctoral Later-Stage Foundation Project of Shenzhen Polytechnic[6021271003K]

Chemistry ; Materials Science

Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:000992926000001

WILEY

20234314974057

Aggregates ; Differential scanning calorimetry ; Glass ; Molecular weight ; Polyelectrolytes ; Temperature

Highway Engineering:406 ; Concrete Reinforcements:412.2 ; Thermodynamics:641.1 ; Chemical Operations:802.3 ; Glass:812.3 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Atomic and Molecular Physics:931.3 ; Temperature Measurements:944.6

Web of Science

1.Inst Crit Mat Integrated Circuits, Shenzhen Polytech, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Catalysis, Shenzhen, Peoples R China

Liu, Xiaoqing,Shi, Zhihui,Yu, Feng,et al. The correlation between thermally induced precipitate-to-coacervate transition and glass transition in a polyelectrolyte-bolaamphiphile complex[J]. AGGREGATE,2023,4.

Liu, Xiaoqing,Shi, Zhihui,Yu, Feng,Teng, Chao,Zhang, Chen,&Chen, Zhong-Ren.(2023).The correlation between thermally induced precipitate-to-coacervate transition and glass transition in a polyelectrolyte-bolaamphiphile complex.AGGREGATE,4.

Liu, Xiaoqing,et al."The correlation between thermally induced precipitate-to-coacervate transition and glass transition in a polyelectrolyte-bolaamphiphile complex".AGGREGATE 4(2023).