A new thermodynamic model of volume changes in temperature-sensitive polymer gels

Browarzik, D.

doi:10.1016/j.molliq.2014.06.018

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…These technologies are being used in the information technology (IT), automotive, packaging, and road facility industries as well as end-user industries. A continuously increasing amount of research and development of smart polymers and stimuli-responsive polymers, such as the manufacturing of biomedical application materials using heat sensitive materials [1][2][3][4][5], external stimuli-responsive materials and application technology [6][7][8], smart polymer materials with nanostructured surfaces for biomolecular recognition and bonding [9][10][11], and smart polymer materials sensitive to temperature and light, is being carried out. As interest in smart materials is rapidly increasing in the electronics and automobile industries, automobiles, smart displays, energy harvesting, sensor devices, and smart coating materials are also representative research fields [12,13].…”

Section: Introductionmentioning

confidence: 99%

Transparency- and Repellency-Enhanced Acrylic-Based Binder for Stimuli-Responsive Road Paint Safety Improvement Technology

et al. 2021

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In the current study, an acrylic polymer binder applicable to road signs was successfully developed by mixing various acrylic, acrylate-type, and photoinitiator-based monomer species at different acrylate series/silicone acrylate ratios. An amorphous acrylic monomer was used, and the distance between the polymers was increased to improve transparency. The binder was designed with the purpose of reducing the yellowing phenomenon due to resonance by excluding the aromatic ring structure, which is the main cause of yellowing. The optical properties of the binder were determined according to the content of n-butyl methacrylate/methyl methacrylate and the composition of the crosslinking agent in the formulation. Allyl glycidyl ether and dilauroyl peroxide were used to improve the yellowing problem of benzoyl peroxide, an aromatic photoinitiator. Adding a silicone-based trivalent acrylic monomer, 3-(trimethoxysilyl)propyl methacrylate (TMSPMA), was also found to have a significant effect on the transparency, shear properties, and water resistance of the binder. When 15 wt% TMSPMA was added, the best water repellency and mechanical properties were exhibited. The surface morphology of the improved binder and the peeling part were confirmed using field emission scanning electron microscopy. The acrylic polymer developed in this study can be applied in the coating and adhesive industries.

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Section: Introductionmentioning

confidence: 99%

Transparency- and Repellency-Enhanced Acrylic-Based Binder for Stimuli-Responsive Road Paint Safety Improvement Technology

et al. 2021

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“…A comprehensive overview of this modeling approach is given by Horkay and McKenna (2007). More recent developments based on this classical model can be found in Oliveira et al (2004), Cai and Suo (2012), Browarzik (2014), and Fujine et al (2015).…”

Section: Introductionmentioning

confidence: 99%

Modeling and simulation of hydrogels for the application as finger grippers

Attaran

Keller

Wallmersperger

2017

Journal of Intelligent Material Systems and Structures

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A chemo-electro-mechanical continuum model developed previously by the authors is utilized in this article to simulate electrically driven hydrogels for the application as finger grippers. To that end, a system consisting of an anionic gel and a cationic gel immersed in NaCl solution bath is discretized and numerically solved. An electric field is then applied between two electrodes on top and bottom of the simulation domain. For the numerical treatment of this study, the finite element method is exploited. By gradual increase in the electric potential between the two electrodes, the bending movement of the gels is realized. The process leading to bending of the gels is elaborated in detail in this article. It is concluded that our approach proves to be a practical tool for simulation of the closing and opening mechanism of a finger gripper stimulated by electric field.

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Two‐scale computational homogenization of calcified hydrogels

Aygün

Klinge²

2023

Math Methods in App Sciences

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The development of new type of hydrogels featuring enhanced properties is a recent topic and of particular interest for a wide range of industrial applications, especially in biomedical sector. The present contribution focuses on the mutliscale modeling of hydrogels that are treated by the enzymatic mineralization and thus enriched with calcium phosphate. More specifically, the calcium phosphate forms spherical or honeycomb structures in the hydrogel matrix, which significantly improves effective material properties such as stiffness and strength. The chosen multiscale finite element method (FEM) homogenization strategy uses the Hill–Mandel macrohomogeneity condition for bridging two scales: the macroscopic boundary value problem (BVP) simulates the specimen behavior, whereas the microscopic BVP investigates the representative volume element (RVE) depicting the heterogeneous multiphase microstructure. The approach proposed uses the Ogden model to simulate the hydrogel and the neo‐Hooke model for the calcium phosphate phase. It varies the RVE type and the macroscopic tests in order to study the influence of the microstructure on the effective behavior and uses experimental data to determine missing microscopic material parameters. Chosen numerical examples demonstrate the applicability of the numerical tool for the estimation of the optimal microscopic arrangement of phases.

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A new thermodynamic model of volume changes in temperature-sensitive polymer gels

Cited by 5 publications

References 33 publications

Transparency- and Repellency-Enhanced Acrylic-Based Binder for Stimuli-Responsive Road Paint Safety Improvement Technology

Transparency- and Repellency-Enhanced Acrylic-Based Binder for Stimuli-Responsive Road Paint Safety Improvement Technology

Modeling and simulation of hydrogels for the application as finger grippers

Two‐scale computational homogenization of calcified hydrogels

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