【摘要】 为了制备性能优异的导电非织造布，以聚氨酯非织造布为原料，利用水性聚氨酯(WPU)对聚氨酯非织造布进行改性整理，采用模板涂覆法将液态金属(LM)涂覆到经WPU整理的聚氨酯非织造布上，最后采用WPU封装得到可拉伸的导电织物。通过扫描电子显微镜、接触角测试仪、傅里叶红外分析、电加热试验和电磁屏蔽测试研究了LM导电织物的结构及性能。结果表明：经过WPU处理的聚氨酯非织造布的接触角从107.7°下降到71.6°,力学性能变化不大；3 mm宽的LM导电织物电阻达到0.35Ω,在100%伸长下电阻变化小于10%,在50%形变下拉伸循环200次电阻的相对变化小于6%;将其作为电加热织物时，在0.36 V电压下的最高温度可达63.5℃;另外，LM导电织物还具有优异的电磁屏蔽效果，即使在拉伸状态下，织物的电磁屏蔽效能最高可达69.98 dB。更多还原

【Abstract】 In order to prepare conductive nonwovens with excellent performance, polyurethane nonwovens are modified and finished with waterborne polyurethane(WPU), liquid metal(LM) is coated on the polyurethane nonwovens treated with WPU by template coating method, and finally the stretchable conductive fabric is obtained by WPU encapsulation. The structure and properties of LM conductive fabric are studied by scanning electron microscope, contact angle tester, fourier transform infrared analysis, electric heating test and electromagnetic shielding test. The results show that the contact angle of WPU treated polyurethane nonwovens decreases from 107.7° to 71.6°, and the mechanical properties change little; The resistance of 3 mm wide LM conductive fabric reaches 0.35 Ω, and the change of resistance is less than 10% at 100% elongation, and the relative change of resistance is less than 6% at 50% deformation after 200 cycles of stretching; When it is used as electric heating fabric, the maximum temperature can reach 63.5 ℃ at 0.36 V voltage; In addition, LM conductive fabric also has excellent electromagnetic shielding effect. Even in the tensile state, the electromagnetic shielding efficiency of the fabric can reach up to 69.98 dB.更多还原