通过水浴加热法制备室温液态金属—GaInSn合金,然后将其注射到热塑性弹性体管,制备了可拉伸导线,利用能谱分析仪(EDS)和差示扫描量热仪(DSC)表征了液态金属的组分和凝固点,并利用四点法研究了液态金属基可拉伸导线的电学性能.结果表明,该液态金属由镓铟锡(m(Ga):m(In):m(Sn)=67.3:19.2:13.5)组成,具有低凝固点(-1.4 ℃),高电导率(2.89×104S/cm).液态金属基可拉伸导线可以拉伸200%,电阻增加了1.6 Ω.在100~1000 mm/min的拉伸速率下,拉伸速率对其电阻基本无影响.可拉伸导线从0~100%~0循环拉伸200次,电阻仅增加了0.021 Ω.实验结果展现出液态金属基可拉伸导线在柔性电子器件中的应用潜力.%Room temperature liquid metal,GaInSn alloy,was prepared by heating in water bath,and then was inj ected into TPE tubes for fabricating stretchable conductive wires.Component and freezing temperature of liq-uid metal were characterized by EDS and DSC,respectively,and electrical performances of stretchable conduc-tive wires were tested by four-points method.The results show that liquid metal is composed of gallium,indium and tin with weight ratio of 6 7.3:1 9.2:1 3.5.It has a low freezing temperature (-1.4 ℃)and a high electric conductivity (2.89×104S/cm).Electric resistance of stretchable conductive wires increases by 1.6 Ω at a stain of 200%,and keeps stable at tensile speed from 100 to 1 000 mm/min.The electric resistance increases by just 0.021 Ω after the tension trials by loading and unloading for 200 cycles.The experimental results show that stretchable conductive wires have an application potentiality in flexible electric devices.
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