Printable, Degradable, and Biocompatible Ion Gels from a Renewable ABA Triblock Polyester and a Low Toxicity Ionic Liquid

Tang, Boxin; Schneiderman, Deborah K.; Bidoky, Fazel Zare; Frisbie, C. Daniel; Lodge, Timothy P.

doi:10.1021/acsmacrolett.7b00582

Cited by 43 publications

(34 citation statements)

References 57 publications

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“…[ 78 ] Since unlimited combinations in cations and anions are possible for ILs, one plausible approach is to design and synthesize biocompatible ILs and fabricate ionic skins using the APN polymer network. [ 78,79 ]…”

Section: Resultsmentioning

confidence: 99%

Block Copolymer‐Based Supramolecular Ionogels for Accurate On‐Skin Motion Monitoring

Cho

et al. 2021

Adv Funct Materials

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Interest in wearable and stretchable on‐skin motion sensors has grown rapidly in recent years. To expand their applicability, the sensing element must accurately detect external stimuli; however, weak adhesiveness of the sensor to a target object has been a major challenge in developing such practical and versatile devices. In this study, freestanding, stretchable, and self‐adhesive ionogel conductors are demonstrated which are composed of an associating polymer network and ionic liquid that enable conformal contact between the sensor and skin even during dynamic movement. The network of ionogel is formed by noncovalent association of two diblock copolymers, where phase‐separated micellar clusters are interconnected via hydrogen bonds between corona blocks. The resulting ionogels exhibit superior adhesive characteristics, including a very high lift‐off force of 93.3 N m−1, as well as excellent elasticity (strain at break ≈720%), toughness (≈2479 kJ m−3), thermal stability (≈150 °C), and high ionic conductivity (≈17.8 mS cm−1 at 150 °C). These adhesive ionogels are successfully applied to stretchable on‐skin strain sensors as sensing elements. The resulting devices accurately monitor the movement of body parts such as the wrist, finger, ankle, and neck while maintaining intimate contact with the skin, which was not previously possible with conventional non‐adhesive ionogels.

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Section: Resultsmentioning

confidence: 99%

Block Copolymer‐Based Supramolecular Ionogels for Accurate On‐Skin Motion Monitoring

Cho

et al. 2021

Adv Funct Materials

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“…Self‐assembled morphologies of block copolymers (BCPs) containing ionic liquids (ILs) are an emerging class of novel materials for applications such as dye‐synthesized solar cells, 1 electrolyte gate transistors, 2 electrochemical displays, 3 supercapacitors, 4 and gas separation membranes 5 . In the presence of selective solvent(s), amphiphilic BCPs self‐assemble into ordered mesomorphic structures (known as mesophases) with long‐range order.…”

Section: Introductionmentioning

confidence: 99%

Ion transport in polymerized lyotropic liquid crystals containing ionic liquid

Bandegi

Kim

Foudazi

2021

Journal of Polymer Science

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In this work, we investigate the effect of morphology and segmental dynamics on ion transport in polymerized lyotropic liquid crystals (polyLLCs) containing 1‐butyl‐3‐methylimidazolium tetrafluoroborate as ionic liquid (IL). We demonstrate that two important factors, which affect ion conduction in polyLLCs, are grain size and chain density at the interface. The polyLLC with large grain size (70 nm) shows significant reduction in ion conductivity (one order of magnitude) compared to its homopolymer/IL mixture. However, the polyLLC with small grain size (20 nm) has little difference in ion conductivity compared to its homopolymer/IL mixture. It is observed that decreasing the chain density enhances the interaction of IL with polymer chains and consequently slows the relaxation of polymer chains. In addition, comparing the dynamics of polymer chains in mixtures of homopolymer/IL and templated LLC mesophases shows that the confinement in LLC structure prolongs the relaxation of polymer chains.

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“…The prepared ion gel electrolytes demonstrate electrical conductivity up to 2.9 mS/cm. The application of biodegradable synthetic polymers for the preparation of solid electrolytes was also reported: ion gels based on poly(ε-decalactone)-b-poly(DL-lactide)-b-poly(ε-decalactone) and a low toxicity ionic liquid, 1-butyl-1-methylpyrrolidinium bistrifluoromethanesulfonylimide were used for a printed electrolyte-gated organic transistor [22].…”

Section: Introductionmentioning

confidence: 99%

Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

et al. 2020

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The natural deep eutectic solvent (NADES) based on choline chloride (ChCl) and lactic acid (LA) was used for the preparation of chitosan (CS) films by the solution casting method. The content of NADES in films was from 0 to 82 wt%. The impact of NADES on the morphology and crystalline structure of films was investigated using scanning electron microscopy as well as wide-angle and small-angle X-ray scattering. The experimental results allow to propose CS chains swelling in NADES. FTIR spectroscopy confirms the interactions between CS and NADES components via the formation of hydrogen and ion bonds. The thermal properties of the composite films were studied by simultaneous thermogravimetric and differential thermal analysis. Thermomechanical analysis demonstrated appearance of two transitions at temperatures between −23 and −5 °C and 54–102 °C depending on NADES content. It was found that electrical conductivity of film with 82 wt% of NADES reaches 1.7 mS/cm. The influence of the composition and structure of films on the charge carriers concentration and their mobility is discussed.

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Printable, Degradable, and Biocompatible Ion Gels from a Renewable ABA Triblock Polyester and a Low Toxicity Ionic Liquid

Cited by 43 publications

References 57 publications

Block Copolymer‐Based Supramolecular Ionogels for Accurate On‐Skin Motion Monitoring

Block Copolymer‐Based Supramolecular Ionogels for Accurate On‐Skin Motion Monitoring

Ion transport in polymerized lyotropic liquid crystals containing ionic liquid

Ionic Conductivity and Structure of Chitosan Films Modified with Lactic Acid-Choline Chloride NADES

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