Chengzhi Zhu1, Rongyi Yao1, Yanjun Chen2, Mengran Feng1, Shuai Ma1, Chaocan Zhang1. 1. School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China. 2. School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China. Electronic address: yanjunchen@whut.edu.cn.
Abstract
HYPOTHESIS: The microfluidic technology can drive molecules to organize into aggregates with nano-structures, and gives a possibility to control aggregate morphologies by adjusting hydrodynamic parameters of microfluidics. COMSOL Multiphysics is a useful software to simulate the mixing situation of solutions in microfluidic. Here, experiments and simulation are combined to study the self-assembly of gradient copolymers in the microfluidic device. EXPERIMENTS: Fluorinated gradient copolymers self-assembled in a three-dimensional co-flow focusing microfluidic device (3D CFMD). Hydrodynamic parameters of 3D CFMD were adjusted to control morphologies and the sizes of copolymer aggregates. A simulation software, COMSOL Multiphysics, was used to simulate the mixing and diffusion of outer phase stream and inner phase stream to explore the mixing kinetics of two streams in the microchannels. FINDINGS: 3D CFMD offered a novel platform for the continuous and controllable self-assembly of fluorinated gradient copolymer. Various morphologies of copolymer aggregates were obtained in 3D CFMD, but just spherical micelles were formed by a traditional solvent-inducing method. The flow velocity, initial water content of outer-phase stream, and the copolymer concentration of inner-phase stream had great effects on the morphology and size of copolymer aggregates. The simulation results made us a better understanding on the microfluidic self-assembly.
HYPOTHESIS: The microfluidic technology can drive molecules to organize into aggregates with nano-structures, and gives a possibility to control aggregate morphologies by adjusting hydrodynamic parameters of microfluidics. COMSOL Multiphysics is a useful software to simulate the mixing situation of solutions in microfluidic. Here, experiments and simulation are combined to study the self-assembly of gradientcopolymers in the microfluidic device. EXPERIMENTS: Fluorinated gradientcopolymers self-assembled in a three-dimensional co-flow focusing microfluidic device (3D CFMD). Hydrodynamic parameters of 3D CFMD were adjusted to control morphologies and the sizes of copolymer aggregates. A simulation software, COMSOL Multiphysics, was used to simulate the mixing and diffusion of outer phase stream and inner phase stream to explore the mixing kinetics of two streams in the microchannels. FINDINGS: 3D CFMD offered a novel platform for the continuous and controllable self-assembly of fluorinated gradientcopolymer. Various morphologies of copolymer aggregates were obtained in 3D CFMD, but just spherical micelles were formed by a traditional solvent-inducing method. The flow velocity, initial water content of outer-phase stream, and the copolymer concentration of inner-phase stream had great effects on the morphology and size of copolymer aggregates. The simulation results made us a better understanding on the microfluidic self-assembly.
Authors: Diego A Huyke; Ashwin Ramachandran; Oscar Ramirez-Neri; Jose A Guerrero-Cruz; Leland B Gee; Augustin Braun; Dimosthenis Sokaras; Brenda Garcia-Estrada; Edward I Solomon; Britt Hedman; Mario U Delgado-Jaime; Daniel P DePonte; Thomas Kroll; Juan G Santiago Journal: J Synchrotron Radiat Date: 2021-05-19 Impact factor: 2.557