基于纳米改性波特兰水泥的新型湿度传感器

坦亚 拉特, 安杰 伊-
土木、环境和自然资源工程系

摘要

常用的湿度传感器是基于金属氧化物、聚合物或碳。它们的传感精度通常会随着时间的推移而下降，特
别是当暴露在较高的温度或非常高的湿度下。在这项研究中，我们评估了一种基于利用含有原位生长的碳纳米纤
维（CNFs）的波特兰水泥基灰泥的替代解决方案。电阻率、CNF含量和湿度之间的关系被确定。灵敏度最高的是
含有 10wt.%的纳米改性水泥的样品，相当于 0.27wt.%的 CNF。计算出的最高灵敏度是相对湿度（RH）每变化 1%约
0.01024。在 11%到 97%的湿度范围内，测量的电阻率是RH的线性函数。估计渗滤阈值在纳米改性水泥的 7wt.%左
右，对应于约 0.19wt.%的 CNF。

关键词

湿度传感器；纳米改性；波特兰水泥

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