Structural and Gelation Characteristics of Metallo-Supramolecular Polymer Model-Network Hydrogels Probed by Static and Dynamic Light Scattering

Structural and Gelation Characteristics of Metallo-Supramolecular Polymer Model-Network Hydrogels Probed by Static and Dynamic Light Scattering
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静态和动态光散射探测金属超分子聚合物模型网络水凝胶的结构和凝胶特性

DOI:
10.1021/acs.macromol.1c00036
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发表时间:
2021
期刊:
影响因子:
5.5
通讯作者:
S. Seiffert
S. Seiffert
中科院分区:
化学1区
文献类型:
--
作者:
M. Koziol;K. Fischer;S. Seiffert

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超分子聚合物凝胶是一类很有前途的材料,其聚合物组分通过瞬时键如金属-配体相互作用连接,从而在整个样品体积中跨越动态网络。由于这些网络中的短键寿命,在适当的时间和长度尺度上的结构表征是一个挑战。为了应对这一挑战,我们通过使用不同的二价金属离子,其散射特性进行系统的调查的目的,不同的遥爪聚(乙二醇)模型网络的关联强度。引入一种制备方法,打开了调整凝胶化时间的机会,允许通过时间分辨光散射揭示潜在的凝胶化机制。凝胶散射强度的统计分析表明,取决于金属三联吡啶协会强度的主要差异。
Supramolecular polymer gels are a promising class of materials whose polymer components are connected by transient bonds such as metal–ligand interactions, thereby spanning a dynamic network throughout the entire sample volume. Due to the short bond lifetimes in these networks, structural characterization on appropriate time and length scales is a challenge. To address this challenge, we vary the association strengths of telechelic poly(ethylene glycol) model networks through the use of different bivalent metal ions with the aim of conducting a systematic investigation of their scattering properties. Introduction of a preparation method that opens the opportunity to tune the gelation time allows the underlying gelation mechanism to be revealed by time-resolved light scattering. A statistical analysis of the gel scattering intensities shows major differences depending on the metal-terpyridine association strength.
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影响因子: --
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