棉镀银氨纶包芯纱的制备及应变传感性能研究

Preparation and strain sensing property of cotton silve-plated spandex core-spun yarn

研究棉镀银氨纶包芯纱的拉伸及导电性能。将氨纶在拉伸状态下利用多巴胺、硅烷偶联剂进行表面改性处理,通过化学镀膜法制备了镀银氨纶,纺制C/Pu 14.6 tex(44.4 dtex)棉镀银氨纶包芯纱,对镀银氨纶微观形貌进行表征并测试棉镀银氨纶包芯纱拉伸弹性与导电性。结果表明:氨纶表面有一层呈鳞片状银粒子薄膜;镀银氨纶自然伸直状态下电阻率平均值为0.010 4Ω·cm,拉伸2倍时电阻率平均值为0.032 2Ω·cm,棉镀银氨纶包芯纱的拉伸可达1.24倍,拉伸前后的电阻率平均值分别为0.049 0Ω·cm和0.148 0Ω·cm,电阻率波动范围小;棉镀银氨纶包芯纱在手套表面随手指缓慢弯曲时电信号图像呈下降趋势,自然伸直时电信号呈稳定状态,在120 s内循环弯曲36次后电信号规律变化且仍有稳定的电信号输出。认为:棉镀银氨纶包芯纱具有良好的拉伸弹性、导电耐久性、循环稳定性;制备过程中银粒子易脱落、易被氧化等问题有待进一步改进。

Tensile and conductivity of cotton silver-plated spandex core-spun yarn were studied. Surface of spandex was modified by dopamine and silane coupling agent in tensile state.The silver-plated spandex was prepared by chemical coating method. C/Pu 14.6 tex(44.4 dtex) cotton silver-plated spandex core-spun yarn was spun.Microstructure of silver-plated spandex was characterized,tensile elasticity and conductivity of cotton silver-plated spandex core-spun yarn were tested.The results showed that there was a thin film of silver particles on the surface of spandex. The average resistivity of silver-plated spandex under natural elongation was 0.010 4 Ω·cm,the average resistivity of silver-plated spandex was 0.032 2 Ω·cm when it was stretched two times as the original length. The tensile of cotton silver-plated spandex core-spun yarn could be reached 1.24 times,the average resistivity before and after stretching was 0.049 0 Ω·cm and 0.148 0 Ω·cm respectively.The resistivity fluctuation range was small.When cotton silver-plated spandex core-spun yarn was slowly bent on the glove surface,electrical signal image showed a downward trend.When it was naturally stretched,the electrical signal showed stable state.After cyclic bending for 36times within 120 s,the electrical signal changed regularly and still had stable electrical signal output.It is considered that cotton silver plated spandex core-spun yarn has better tensile elasticity,conductive durability and cyclic stability.In the process of preparation,silver particles are easy to fall off and be oxidized,which should be further improved.