Heo Tae-Young, Audus Debra J, Choi Soo-Hyung
Department of Chemical Engineering, Hongik University, Seoul, 04066, Republic of Korea.
Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States.
ACS Macro Lett. 2023 Oct 17;12(10):1396-1402. doi: 10.1021/acsmacrolett.3c00347. Epub 2023 Oct 2.
The scaling relationship of complex coacervate core micelles (C3Ms) has been investigated experimentally and theoretically. The C3Ms are formed by mixing two oppositely charged block copolyelectrolyte solutions (i.e., AB + AC system) and are characterized by small-angle neutron (SANS) and X-ray scattering (SAXS). Scaling relationships for micellar structure parameters, including core radius, total radius, corona thickness, and aggregation number, all with respect to the core block length, are determined. A scaling theory is also proposed by minimizing the free energy per chain, leading to four regimes depending on the core and corona chain conformations. Although the corona block is significantly longer than the core block, the structure of our C3Ms is consistent with that of the crew-cut I regime. A highly swollen core by water enables the core blocks to be stretched significantly and corona chains to be minimally overlapped.
已通过实验和理论研究了复合凝聚层核心胶束（C3M）的标度关系。C3M由两种带相反电荷的嵌段聚电解质溶液混合形成（即AB + AC体系），并通过小角中子散射（SANS）和X射线散射（SAXS）进行表征。确定了胶束结构参数的标度关系，包括核心半径、总半径、冠层厚度和聚集数，所有这些参数均与核心嵌段长度有关。还通过最小化每条链的自由能提出了一种标度理论，根据核心和冠层链的构象得出四种状态。尽管冠层嵌段比核心嵌段长得多，但我们的C3M结构与平头I状态的结构一致。被水高度溶胀的核心使核心嵌段能够显著伸展，冠层链的重叠最小。
