The Origins of Toroidal Micelles from a Liquid–Crystalline Triblock Copolymer<sup>†</sup>

Jin, Bixin; Liu, Guojun; Li, Xiaoyü

doi:10.1002/cjoc.202000313

Cited by 11 publications

(14 citation statements)

References 67 publications

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“…Thus, the formation of toroids is in accordance with the perforation mechanism. In contrast to previous reports, 39 the perforation in our simulation occurs directly in the interior of the vesicles. Moreover, to understand this process on a microscale, the average end-to-end distance ⟨R e ⟩ of polymer chains with simulation time is given in Figure 5a.…”

Section: Instantaneous Composition Conversion-directedcontrasting

confidence: 94%

Disassembly of Amphiphilic AB Block Copolymer Vesicles in Selective Solvents: A Molecular Dynamics Simulation Study

et al. 2023

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The disassembly of amphiphilic AB block copolymers in selective solvents by molecular dynamic simulation is investigated in this study. The disassembly from one initial assembly into different aggregates is controlled by thermodynamic processes that depend on the instability of the system. Based on this strategy, B x can be converted to A x in A 2 B x B 18−x diblock copolymers (where x is a variable integer) by external stimuli such as light and pH. The A 2 B x B 18−x copolymer vesicle in a stable state becomes unstable when A 2 B x B 18−x copolymers are converted to A 2 A x B 18−x copolymers. The simulation results show that the instability of the system induced by B x conversion is a function of x, and the larger x, the higher the instability. The assembly can thereby disassemble from the initial vesical into a ring, rod, sphere, disorder aggregate, as well as completely dispersed polymer chains by increasing x. Notably, some of those structures cannot be obtained by self-assembly from the initial homogeneous state. Taking x = 5 as an example, toroid micelles are obtained by converting A 2 B 5 B 13 into A 7 B 13 , whereas they are not obtained by selfassembly from a homogeneous state for the A 7 B 13 block copolymer under the same conditions. Moreover, in addition to the x value, the B x conversion rate and the conversed amount of polymer chains can also affect the disassembly. Toroid micelles are impossible to form under a slow B x conversion rate and when the conversion amount is less than 75% of the total copolymer chains.

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Section: Instantaneous Composition Conversion-directedcontrasting

confidence: 94%

Disassembly of Amphiphilic AB Block Copolymer Vesicles in Selective Solvents: A Molecular Dynamics Simulation Study

et al. 2023

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“…Liu [ 28‐29,110 ] and Li [111] have put forward the concept of “Liquid Crystalline‐Driven Self‐Assembly (LCDSA)” of LC BCPs in their respective research papers. They both found that the introduction of LC blocks could also greatly affect the morphology of BCP micelles, resulting in some special morphologies that could not be obtained by conventional coil‐coil BCPs.…”

Section: Precise Controllable Self‐assembly Of 2d Structuresmentioning

confidence: 99%

Precise and Controllable Assembly of Block Copolymers^†

et al. 2022

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Bixin Jin received his PhD degree in Material Science and Engineering from Beijing Institute of Technology under the supervision of Prof. Xiaoyu Li in 2020. Currently, he works as a postdoctoral fellow in the same group. His research is focused on the precise self-assembly of liquid crystalline block copolymers. Yiqi Chen has been a MS student in Materials and Chemical Engineering at Beijing Institute of Technology under the supervision of Prof. Xiaoyu Li since 2021. Her research interest is precise self-assembly of liquid crystalline block copolymers. Yunjun Luo has been a professor in the school of Material Science and Engineering at Beijing Institute of Technology since 1999, and the director of the Key Laboratory of High Energy Density Materials of the Ministry of Education. His research interests are energetic materials and polymer materials. Xiaoyu Li has been a professor in the school of Material Science and Engineering at Beijing Institute of Technology since 2017. His current research interests mainly include the precise assembly of crystalline/liquid crystalline block copolymers and supramolecular motifs, and synthesis and applications of novel energetic polymers.Contents 1. Introduction 94 2. Extension of Precise Self-Assembly Methodology 95 2.1. "Seeded-Growth" method 95 2.2. "Self-Seeding" method 97 2.3. "In-Situ Nucleation-Growth" method 98 2.4. Comparison of the three different growth modes 99 3. Precise Controllable Self-Assembly of 2D Structures 99 3.1. Crystalline BCP systems 99 3.2. Liquid crystalline BCP systems 101 3.3. Other systems 101 4. Multilevel Self-Assembled Structures 102 4.1. Multilevel self-assembly via non-covalent interactions 102 4.2. Multilevel self-assembly at interfaces 103 5. Application of Functionalized Precise Self-assembled Structures 104 6. Conclusions and Perspectives 105 © 2022 SIOC, CAS, Shanghai, & WILEY-VCH GmbH www.cjc.wiley-vch.de 95

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“…Apart from the examples presented above, other orthogonal supramolecular interaction pairs were also well explored, including hydrophobic interaction/high affinity between fluorinated moieties, 96 hydrogen bond/hydrophobic interactions, 97 hydrogen bond/coordination bonds, 61,98 and hydrogen bond/π–π interaction. 99 Meanwhile, some other strong interactions or driving forces could also be combined and utilized for constructing self-sorting systems, including crystallization of small molecules and macromolecules, 16 liquid crystalline ordering-driven assembly, 17,100–104 etc.…”

Section: Construction Methodsmentioning

confidence: 99%