Regulation of Two-Dimensional Platelet Micelles by Dynamic Changing of Polymer Topological Architectures upon Light Irradiation

Xiang, Bingbing; Wang, Xiang; Teng, Feiyang; Liu, Liping; Li, Meili; Meng, Xiancheng; Chu, Zhenyan; Zhou, Xianjing; Xie, Yujie; Tong, Zaizai

doi:10.1021/acs.macromol.3c01720

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Macromolecules

2023

DOI: 10.1021/acs.macromol.3c01720

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Regulation of Two-Dimensional Platelet Micelles by Dynamic Changing of Polymer Topological Architectures upon Light Irradiation

Bingbing Xiang,

Xiang Wang,

Feiyang Teng

et al.

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2024

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Cited by 6 publications

(1 citation statement)

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“…One-dimensional (1D) or two-dimensional (2D) nanoparticles with precision control over size can be obtained via a process of crystallization-driven self-assembly (CDSA) of block copolymers. − Seeded growth termed “living” CDSA has been identified as a powerful method to create size-tunable nanoparticles that could be regulated by mass ratios of unimer-to-seed. − The precise control of 1D or 2D micelles using the seeded growth approach with an identical crystallizable core is extensively studied, and a range of well-defined core–shell nanoparticles are created. − Epitaxial crystallization is usually regarded as the crystal growth mechanism for the formation of uniform micelles. These uniform core–shell micelles represent an attractive category of nanomaterials due to their widespread applications in terms of sensors, , catalyst, − reinforcement, , and emulsion. , …”

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confidence: 99%

Regulation of Two-Dimensional Platelet Micelles with Tunable Core Composition Distribution via Coassembly Seeded Growth Approach

Liu,

Meng,

et al. 2024

ACS Macro Lett.

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Seeded growth termed "living" crystallization-driven selfassembly (CDSA) has been identified as a powerful method to create oneor two-dimensional nanoparticles. Epitaxial crystallization is usually regarded as the growth mechanism for the formation of uniform micelles. From this perspective, the unimer depositing rate is largely related to the crystallization temperature, which is a key factor to determine the crystallization rate and regulate the core composition distribution among nanoparticles. In the present work, the coassembly of two distinct crystallizable polymers is explored in detail in a one-pot seeded growth protocol. Results have shown that polylactone containing a larger number of methylene groups (−CH 2 −) in their repeating units such as poly(ηoctalactone) (POL) has a faster crystallization rate compared to poly(εcaprolactone) (PCL) with a smaller number of −CH 2 − at ambient temperature (25 °C), thus a block or blocky platelet structure with heterogeneous composition distribution is formed. In contrast, when the crystallization temperature decreases to 4 °C, the difference of crystallization rate between both cores become negligible. Consequently, a completely random component distribution within 2D platelets is observed. Moreover, we also reveal that the core component of seed micelles is also paramount for the coassembly seeded growth, and a unique structure of flower-like platelet micelle is created from the coassembly of PCL/POL using POL core-forming seeds. This study on the formation of platelet micelles by one-pot seeded growth using two crystallizable components offers a considerable scope for the design of 2D polymer nanomaterials with a controlled core component distribution.

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mentioning

confidence: 99%

Regulation of Two-Dimensional Platelet Micelles with Tunable Core Composition Distribution via Coassembly Seeded Growth Approach

Liu,

Meng,

et al. 2024

ACS Macro Lett.

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Hybrid Single Crystals of Poly(ε‐caprolactone) Homopolymers and Poly(ε‐caprolactone)‐b‐Poly(ethylene oxide) Block Copolymers

Yang,

Li,

2024

Macro Chemistry & Physics

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Hybrid single crystals (HSCs) of different poly(ε‐caprolactone) (PCL) homopolymers with a poly(ε‐caprolactone)‐b‐poly(ethylene oxide) (PCL‐b‐PEO) block copolymer (BCP) were prepared. The effects of PCL length, PCL/PCL‐b‐PEO molar ratio, crystallization temperature (Tc) and solvent on crystal morphology were investigated. The optimal Tc for the formation of more perfect HSCs is between those for homo‐crystals of individual PCL and PCL‐b‐PEO and roughly increases with the length of PCL and PCL/PCL‐b‐PEO molar ratio. The chain folding in the HSCs was studied by comparing the experimentally measured heights obtained by atomic force microscopy (AFM) and theoretically calculated ones based on a sandwich structure model. Under most situations, the PCL homopolymers adopt a larger chain folding number in the HSCs than that in their homo‐crystals, while the chain folding of BCP remains unaltered. However, when both PCL homopolymer and PCL‐b‐PEO BCP crystallize slowly and the overcrowding of the PEO is effectively alleviated, thicker HSCs can be formed, in which the PCL homopolymer preserves the chain folding in its homo‐crystals but the BCP adopts a reduced chain folding number as compared with that in its homo‐crystals. The relative crystallization rate of PCL homopolymer versus BCP also affects the real composition and overall height of the HSCs.This article is protected by copyright. All rights reserved

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Fabrication of Uniform Anionic Polymeric Nanoplatelets as Building Blocks for Constructing Conductive Hydrogels with Enhancing Conductive and Mechanical Properties

Li,

Guo,

Jin

2024

Macromol. Rapid Commun.

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Conductive hydrogels play a crucial role in advancing technologies like implantable bioelectronics and wearable electronic devices, owing to their favorable conductivity and appropriate mechanical properties. Here, we report a novel bottom‐up approach for crafting conductive nanocomposite hydrogels to achieve enhancing conductive and mechanical properties. In this approach, new poly(ɛ‐caprolactone)‐based block copolymers with sulfonic groups were first synthesized and self‐assembled into uniform polyanionic nanoplatelets. Subsequently, these negatively charged nanoplatelets, with sulfonic groups on the surface, were employed as nano‐additives for the polymerization of 3,4‐ethylenedioxythiophene (EDOT), resulting in poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/nanoplatelet complex with 3.8 times enhanced electrical conductivity compared with their counterparts prepared using block copolymers (BCPs). Blending the (PEDOT:PSS)/nanoplatelet complex with calcium alginate, nanocomposite hydrogels were successfully prepared. In comparison with hydrogels with (PEDOT:PSS)/BCP complexes prepared by a top‐down method, the nanocomposite hydrogels were found to show twice as strong mechanical strength and 1.6 times higher conductivity. This work provides valuable insights into the bottom‐up construction of conductive hydrogels for bioelectronics using well‐controlled polymeric nanoplatelets.This article is protected by copyright. All rights reserved

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Regulation of Two-Dimensional Platelet Micelles by Dynamic Changing of Polymer Topological Architectures upon Light Irradiation

Cited by 6 publications

References 63 publications

Regulation of Two-Dimensional Platelet Micelles with Tunable Core Composition Distribution via Coassembly Seeded Growth Approach

Regulation of Two-Dimensional Platelet Micelles with Tunable Core Composition Distribution via Coassembly Seeded Growth Approach

Hybrid Single Crystals of Poly(ε‐caprolactone) Homopolymers and Poly(ε‐caprolactone)‐b‐Poly(ethylene oxide) Block Copolymers

Fabrication of Uniform Anionic Polymeric Nanoplatelets as Building Blocks for Constructing Conductive Hydrogels with Enhancing Conductive and Mechanical Properties

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