压力/温度复合柔性触觉传感器用导电橡胶的外场特性  

External Field Characteristics of the Conductive Rubber Used as the Multi-Pressure-Temperature Flexible Tactile Sensor

作　　者：黄英[1,2] 刘平[1] 赵兴[1] 仇怀利[1] 葛运建[2] 

机构地区：[1]合肥工业大学电子科学与应用物理学院,安徽合肥230009 [2]中国科学院合肥智能机械研究所,安徽合肥230031

出　　处：《高分子材料科学与工程》2010年第12期95-98,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(60672024);国家863高技术研究发展计划(2007AA04Z220);合肥工业大学博士学位人员专项基金资助

摘　　要：分析了不同填料用量及种类对导电橡胶外场特性(压力、温度)的影响。结果表明,导电网络密度的增大与损伤使得导电橡胶呈现"电阻-负压力系数"(NPC)和"电阻-正压力系数"(PPC),热膨胀和热扰动共同作用使得导电橡胶呈现"电阻-负温度系数"(NTC)和"电阻-正温度系数"(PTC)。热膨胀起主导表现出PTC效应,热扰动起主导则表现出NTC效应。填料用量与种类对于导电橡胶的外场特性影响显著,炭黑(8%)(质量分数,下同)和石墨(5.2%)并用填充导电橡胶,同时消除了PPC和NTC效应,可用于制作压力/温度复合柔性触觉传感器用敏感材料。External field characteristics of conductive rubber were analyzed for the dosage of filler and the type of filler. Under the uniaxial compression field,＇negative pressure coefficient of resistance＇ （NPC） existed when the density of conductive network rose and ＇positive pressure coefficient of resistance＇ （PPC） appeared when the conductive network was destroyed. It discovered that the resistivity changed along with the temperature mainly subjected to the thermal expansion and the thermal disturbance. ＇Positive temperature coefficient of resistance＇ （PTC） appeared when the thermal expansion took the leading role; if the thermal disturbance took the leading role,and then ＇negative temperature coefficient of resistance＇ （NTC） would appear. It is concluded that the resistivity characteristics of the conductive rubber upon external fields are resulted from the change in both the fraction and type of the filler. Avoiding the PPC and NTC effect,carbon （8%） and graphite （5.2%） blended in conductive rubber are able to fabricate the sensitive material for multi-pressure-temperature flexible tactile sensor.

关 键 词：负(正)压力系数 负(正)温度系数 导电橡胶 柔性触觉传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]