Light-cured 3D printing of polymerizable eutectic conductive eutectogels
Ionic gels plays a crucial role in the advancement of flexible electronic devices.However,the utilization of ionic liquids is hindered by their high cost,and toxicity,potential for environmental pollution.To address these challenges,polymeriz-able low eutectic solvents(PDES)were developed using choline chloride(CHCL),hydroxyethyl acrylate(HEA),and acrylamide(AAm)as substitutes for conventional ionic liquids.Subsequently,the desired UV light was projected from the printer to initiate free radical polymerization,resulting in the formation of P(HEA-co-AAm)-CHCL eutectic gel with desired 3D shapes.The successful preparation of PDES was proved through Fourier infrared spectroscopy and differential scanning calorimetry analysis.The electrical conductivity,mechanical properties,thermal stability,optical properties,and sensing properties of P(HEA-co-AAm)-CHCL were tested and analyzed.The results demonstrate that the gel exhibits optimal electrical conductivity and achieves an ionic conductivity of 1.1×10-2 S/m when the molar ratio of CHCL to polymerizable monomers is adjusted to 1∶3.5.At this specific molar ratio,five types of P(HEA-co-AAm)-CHCL gels were subsequently prepared by varying the molar ratio of HEA to AAm.The optimal formu-lation was determined at an HEA to AAM molar ratio of 2.5∶1,resulting in a tensile strength of 2.81 MPa and elongation at break of 1 200%.Moreover,it exhibits high transparency with a visible transmittance of 90%and a strain coefficient of 0.74.Additionally,it demonstrates outstanding sensing performance,cyclic stability,and minimal hysteresis.
3D printingpolymerizable eutectic solventssensing performancetransparent performanceionic gel
NETL
NSTL
万方数据
