Polymer gel with a flexible and highly ordered three-dimensional network synthesized via bond percolation

Li, Xiang; Nakagawa, Seiko; Tsuji, Yui; Watanabe, Nobuyuki; Shibayama, Mitsuhiro

doi:10.1126/sciadv.aax8647

Cited by 82 publications

(94 citation statements)

References 47 publications

(64 reference statements)

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“…The value of T g is known to have a deep correlation with the cross-linking density, which also directly correlates with the heterogeneity of the cross-linking structure 30 – 33 . The heterogeneity of cross-linking networks has been sensitively detected in dynamic fluctuations as reported in polymer network gels using dynamic light scattering measurements 34 .…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous dynamics in the curing process of epoxy resins

Hoshino

Okamoto

Yamamoto

et al. 2021

Sci Rep

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Epoxy resin is indispensable for modern industry because of its excellent mechanical properties, chemical resistance, and excellent moldability. To date, various methods have been used to investigate the physical properties of the cured product and the kinetics of the curing process, but its microscopic dynamics have been insufficiently studied. In this study, the microscopic dynamics in the curing process of a catalytic epoxy resin were investigated under different temperature conditions utilizing X-ray photon correlation spectroscopy. Our results revealed that the temperature conditions greatly affected the dynamical heterogeneity and cross-linking density of the cured materials. An overview of the microscopic mechanism of the curing process was clearly presented through comparison with the measurement results of other methods, such as 1H-pulse nuclear magnetic resonance spectroscopy. The quantification of such heterogeneous dynamics is particularly useful for optimizing the curing conditions of various materials to improve their physical properties.

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Section: Introductionmentioning

confidence: 99%

Heterogeneous dynamics in the curing process of epoxy resins

Hoshino

Okamoto

Yamamoto

et al. 2021

Sci Rep

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“…Therefore, our finding that the fluctuation in mesh size has a significant influence on tracer diffusion may then be used to finely control the transport of a tracer particle embedded in polymer gels. Additionally, synthetic methods for the formation of homogeneous polymer gels were recently reported [ 46 ]. Therefore, our work can also provide insights into tracer diffusion in several applications employing the homogeneous polymer gels.…”

Section: Introductionmentioning

confidence: 99%

Tracer Diffusion in Tightly-Meshed Homogeneous Polymer Networks: A Brownian Dynamics Simulation Study

et al. 2020

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We report Brownian dynamics simulations of tracer diffusion in regularly crosslinked polymer networks in order to elucidate the transport of a tracer particle in polymer networks. The average mesh size of homogeneous polymer networks is varied by assuming different degrees of crosslinking or swelling, and the size of a tracer particle is comparable to the average mesh size. Simulation results show subdiffusion of a tracer particle at intermediate time scales and normal diffusion at long times. In particular, the duration of subdiffusion is significantly prolonged as the average mesh size decreases with increasing degree of crosslinking, for which long-time diffusion occurs via the hopping processes of a tracer particle after undergoing rattling motions within a cage of the network mesh for an extended period of time. On the other hand, the cage dynamics and hopping process are less pronounced as the mesh size decreases with increasing polymer volume fractions. The interpretation is provided in terms of fluctuations in network mesh size: at higher polymer volume fractions, the network fluctuations are large enough to allow for collective, structural changes of network meshes, so that a tracer particle can escape from the cage, whereas, at lower volume fractions, the fluctuations are so small that a tracer particle remains trapped within the cage for a significant period of time before making infrequent jumps out of the cage. This work suggests that fluctuation in mesh size, as well as average mesh size itself, plays an important role in determining the dynamics of molecules and nanoparticles that are embedded in tightly meshed polymer networks.

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“…In Yang's research, [505] a well-defined ammonolysis-based Tetra-PEG hydrogel sealant with a rapid gelation time, strong tissue adhesion, and high mechanical strength was developed. Shibayama and coworkers [506] fabricated hydrogels using a star tetrafunctional poly(ethylene glycol) with N-hydroxysuccinimidyl ester (tetra-PEG-NHS), and 1,14-diamino-3,6,9,12-tetraoxatetradecane (amino-PEG4-amine) as crosslinker. These hydrogels showed homogeneous and ordered threedimensional (3D) network without spatial defects.…”

Section: Tetra-arm Hydrogelsmentioning

confidence: 99%

Hydrogel: Diversity of Structures and Applications in Food Science

Jia

Luo

2021

Food Reviews International

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Hydrogels are a series of soft and wet materials with three dimensions of crosslinked networks. Hydrogels have attracted great attention due to their diverse functional properties, and their wide range of applications, such as in soft robots and actuators, stretched electronic devices, tissue engineering materials, controlled-release drug delivery vehicles, biomedicine materials, food science, and (bio)sensors. In general, there are four core concerns in hydrogel science, including the polymer source, structure fabrication, gel function, and gel applications. According to the logic that the "structure determines function", it is believed that rational design of structures can effectively regulate the functions and applications of hydrogels. Hence, in the current review, "structure" as the core topic will be highly regarded, and the crosslinking mechanisms and structural diversity of hydrogels are comprehensively summarized. Additionally, hydrogels also show their great application potential in food science. Hence, the current review also pays more attention to the application of hydrogels in food nutrition and health, food engineering and processing, and food safety. It is whished that this review not only serves as a reference for improving the comprehensive understanding of the structural design of hydrogels but also provides a forward-looking idea for hydrogel applications in food science.

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Polymer gel with a flexible and highly ordered three-dimensional network synthesized via bond percolation

Abstract: Geometric constraint in pregel solution enables construction of a highly ordered three-dimensional polymer network.

Cited by 82 publications

References 47 publications

Heterogeneous dynamics in the curing process of epoxy resins

Heterogeneous dynamics in the curing process of epoxy resins

Tracer Diffusion in Tightly-Meshed Homogeneous Polymer Networks: A Brownian Dynamics Simulation Study

Hydrogel: Diversity of Structures and Applications in Food Science

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