光固化3D打印可聚合低共熔导电凝胶  

Light-cured 3D printing of polymerizable eutectic conductive eutectogels

作　　者：谢灏荻 张世杰 刘灏 贾雲超 XIE Haodi;ZHANG Shijie;LIU Hao;JIA Yunchao(School of Materials,Henan University,Kaifeng 475004,China;Jiaxing COETEKS Material Co.,Ltd.,Jiaxing 314299,China)

机构地区：[1]河南大学材料学院,河南开封475004 [2]嘉兴领科材料技术有限公司,浙江嘉兴314299

出　　处：《工程塑料应用》2024年第3期7-12,共6页Engineering Plastics Application

基　　金：国家自然科学基金项目(52003075)

摘　　要：离子凝胶对于柔性电子设备的发展具有重要意义,然而离子液体价格昂贵、有毒易造成环境污染。使用氯化胆碱(CHCL)、丙烯酸羟乙酯(HEA)、丙烯酰胺(AAm)制备了可聚合低共熔溶剂(PDES)替代传统离子液体,利用数字光处理(DLP)3D打印的成型方法,通过紫外光引发自由基聚合制备了P(HEA-co-AAm)-CHCL低共熔凝胶。通过傅里叶变换红外光谱、差示扫描量热分析证明了PDES的成功制备。对P(HEA-co-AAm)-CHCL的导电性能、力学性能、光学性能、传感性能进行了测试分析。结果表明,当CHCL和可聚合单体的物质的量之比为1∶3.5时凝胶的导电性能最好,离子电导率可达1.1×10-2 S/m。然后,固定CHCL和可聚合单体的物质的量之比为1∶3.5,改变HEA和AAm的物质的量之比制备了5种P(HEA-co-AAm)-CHCL,结合导电性能和力学性能测试结果发现,当HEA与AAm的物质的量之比为2.5∶1时,其拉伸强度、断裂伸长率分别为2.81MPa,1200%;具有优异的光学透明性,可见光透过率能够达到90%;应变系数为0.74;此外,具有优异的传感性能、循环稳定性等。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,polymerizable 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 1200%.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.

关 键 词：3D打印 可聚合低共熔溶剂 传感性能 透明性 离子凝胶 

分 类 号：TQ427.26[化学工程] TP391.73[自动化与计算机技术—计算机应用技术]