DataVXACS Applied Polymer MaterialsPaper
journal article·2021-11-12Open access

Stiff, Strong, Tough, and Highly Stretchable Hydrogels Based on Dual Stimuli-Responsive Semicrystalline Poly(urethane–urea) Copolymers

Nicolas Candau, Gregory Stoclet, Jean-François Tahon, Adrien Demongeot, Pascal Schouwink, Emel Yilgor, Iskender Yilgor, Yusuf Z. Menceloglu, Oguzhan Oguz

ACS Applied Polymer Materials· Volume 3· Issue 11
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Source abstract

Abstract

There has been a considerable interest in developing stiff, strong, tough, and highly stretchable hydrogels in various fields of science and technology including biomedical and sensing applications. However, simultaneous optimization of stiffness, strength, toughness, and extensibility is a challenge for any material, and hydrogels are well-known to be mechanically weak materials. Here, we demonstrate that poly(ethylene oxide)-based dual stimuli-responsive semicrystalline poly(urethane–urea) (PU) copolymers with high hard segment contents (30 and 40%) can be utilized as stiff, strong, tough, and highly stretchable hydrogels with an elastic modulus (4–10 MPa) tens to hundreds of times higher than that of conventional hydrogels (0.01–0.1 MPa), strength (7–13 MPa) and toughness (53–74 MJ·m–3) fairly comparable to those of the toughest hydrogels reported in the literature, and stretchability beyond 10 times their initial length (1000–1250%). In addition, the shape-memory program has been used to tune the room temperature stiffness and strength of the studied PU copolymers. Finally, the materials show fast shape recovery (less than 10 s) during both heat- and water-activated shape memory cycles, which can be adjusted by a simple modulation of the hard segment content and/or soft segment molecular weight. Our findings may be of interest in emerging biomedical and sensing applications.
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Research context

Polymers

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Advanced Materials and Mechanics · Polymer composites and self-healing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centre Català del Plàstic (CCP), Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC), Av. D’Eduard Maristany, 16, Barcelona 08019, Spain

Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207─UMET─Unité Matériaux et Transformations, Lille F-59000, France

Laboratory for Processing of Advanced Composites (LPAC), Institute of Materials (IMX), École Polytechnique Fédérale de Lausanne (EPFL), Station 12, Lausanne 1015, Switzerland

Institut des Sciences et Ingénierie Chimiques (ISIC), École Polytechnique Fédérale de Lausanne (EPFL), Rue de l’Industrie 17, Case postale 440, Sion 1951, Switzerland

KUYTAM Surface Science and Technology Center, Chemistry Department, Koc University, Sariyer, Istanbul 34450, Turkey

Faculty of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University,, Orhanli, Tuzla, Istanbul 34956, Turkey

Sabanci University Integrated Manufacturing Technologies Research and Application Center & Composite Technologies Center of Excellence, Teknopark Istanbul, Pendik, Istanbul 34906, Turkey

Funding

European Regional Development Fund · Institut Chevreul · Minist??re de l'Enseignement Sup??rieur et de la Recherche · T??rkiye Bilimsel ve Teknolojik Ara??tirma Kurumu · R??gion Nord-Pas de Calais

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