聚酰亚胺/聚乙烯醇湿敏材料性能对比分析

doi:10.3976/j.issn.1002-4026.2022.02.007

Abstract

Abstract:

Humidity is a significant environmental parameter in storage, civil explosives business, and other fields. The performance of humidity-sensitive materials directly determines the quality of sensors. Polyimide and polyvinyl alcohol, the most commonly used humidity-sensing materials in optical fiber humidity sensors, were selected as the research objects. The humidity sensors were fabricated by coating two different humidity-sensitive materials on the surface of the fiber Bragg grating and their sensitivity, response time, and long-term stability were tested and compared. Results show that the linearity of the humidity sensor coated with polyimide is 99.98%, the sensitivity is 5.4 pm/%, the response time is 9.7 min, and the maximum wavelength shift is 5.6 pm. The humidity sensor coated with polyvinyl alcohol has a higher sensitivity in the range of relative humidity 60%~90%, which makes polyvinyl alcohol-based humidity sensors more suitable for humidity measurement in high-humidity environments.

Key words: fiber Bragg grating, humidity-sensitive material, polyimide, polyvinyl alcohol

CLC Number:

TP212

FENG Jin-lai. Properties comparative analysis of polyimide/polyvinyl alcohol-based humidity-sensitive materials[J].Shandong Science, 2022, 35(2): 54-59.

Figures/Tables 6

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References 17

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技术性能	指标
发生范围	温度5~50 ℃;相对湿度7%~95%(23 ℃)
探头精度	温度±0.1 ℃;相对湿度±0.8%
系统精度	温度±0.1 ℃; 相对湿度±1%(23 ℃,7%~80%);±1.5%(23 ℃,80%~90%)
稳定性	温度±0.1 ℃;相对湿度±0.2%

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Properties comparative analysis of polyimide/polyvinyl alcohol-based humidity-sensitive materials

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