Novel Tough Ion-Gel-Based CO₂ Separation Membrane with Interpenetrating Polymer Network Composed of Semicrystalline and Cross-Linkable Polymers

Abstract

A tough ion gel constructed from an interpenetrating polymer network (IPN) and high ionic liquid (IL) content was developed using a one-pot/one-step method. The IPN structure was composed of the physically cross-linked poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) network and the chemically cross-linked poly(N,N-dimethylacrylamide-co-N-succinimidyl acrylate) (poly(DMAAm-co-NSA)) network, which, respectively, contributed to the high mechanical strength and good IL holding property of the IPN ion gel. The IPN ion gel containing 80 wt % of IL, 10 wt % of PVDF-HFP network, and 10 wt % of poly(DMAAm-co-NSA) network prepared at 50 °C displayed high tensile fracture energy (758 kJ/m 3 ) and a good IL holding property under compression at 1.16 MPa (weight loss of the ion gel: 0.79 wt %). An IPN ion gel membrane with a high IL content of 91.3 wt % was successfully fabricated and showed a high CO 2 permeability of 1421 barrer and CO 2 /N 2 permselectivity of 27.

Self-assembling bilayer wiring with highly conductive liquid metal and insulative ion gel layers

“…In addition, the ion gel–LM bilayer becomes extremely fragile when the thickness of the ion gel insulating layer decreases below 82.7 μm. However, the bilayer can be made more durable by selecting mechanically tough ion gels 46 , 47 for thinning. Regarding the insulating properties, the regression line in Supplementary Fig.…”

Poly(N,N-dimethyl)acrylamide-based ion-conductive gel with transparency, self-adhesion and rapid self-healing properties for human motion detection

“…In this study, based on the good adhesion, 37 biocompatibility 38,39 and good compatibility with imidazole-type ionic liquids 40 of poly( N , N -dimethyl)acrylamide (PDMA), we prepared PDMA ion-conductive gels by in situ photopolymerization of N , N -dimethylacrylamide (DMA) monomers in imidazole-based ionic liquids [BMIM][Tf 2 N]. This method has the following advantages: (1) the preparation process of ion-conductive gel is simple and only requires “one-step” ultraviolet irradiation polymerization; (2) the prepared ion gel has multiple properties, such as strong self-adhesion (67.57 kPa), good tensile properties (1080%), high transparency (∼90%), fast self-healing (2 s at room temperature) and great antibacterial activity (∼99% bacterial killing efficiency), which can meet the comprehensive performance requirements of flexible strain sensor materials; (3) the prepared ion gel has excellent electromechanical properties, such as high sensitivity, low hysteresis and good repeatability, when used as a sensor and can be used to monitor human movements, such as bending of fingers, wrists and elbows.…”

Controlled mechanical properties of poly(ionic liquid)-based hydrophobic ion gels by the introduction of alumina nanoparticles with different shapes

“…The IL imparts the ion gels with its intrinsic advantages (i.e. negligible vapour pressure, high thermal stability, 1 flame resistance, 2 high ionic conductivity, 3,4 and selective CO 2 absorption capacity [5][6][7] ), while the polymer matrix enables their processability. Furthermore, the physicochemical properties of ion gels can be tailored by selecting appropriate combinations of cations and anions in the ILs.…”