Humidity sensor using epoxy resin containing quaternary ammonium salts

被引：88

作者：

Lee, CW

Rhee, HW

Gong, MS ^{[1
]}

机构：

[1] Dankook Univ, Dept Chem, Cheonan 330714, Chungnam, South Korea

[2] Sogang Univ, Dept Chem Engn, Seoul 121742, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2001年 / 73卷 / 2-3期

关键词：

polymeric humidity sensor; epoxy resin; quaternary ammonium salts; glycidyl trimethyl ammonium chloride;

D O I：

10.1016/S0925-4005(00)00668-7

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Humidity-sensitive epoxy monomer, glycidyl trimethyl ammonium chloride (GTMAC) was selected as the humidity-sensing resin. Polypropylene glycol diglycidyl ether (PPGDGE) and methyl tetrahydrophthalic anhydride (MTPHA) were used as a comonomer and a curing agent, respectively. The humidity-sensitive membranes were composed of GTMAC, PPGDGE and MTPHA. When impedance characteristics of the epoxy resins containing quaternary ammonium salts were measured, the impedance decreased linearly with an increase in the content of GTMAC in its semi-logarithmic graph. The impedance changed from 10(7) to 10(3) Omega between 30 and 90%RH, which was required for a common humidity sensor, Temperature dependence, frequency dependence and response time were also measured. The humidity-sensitive characteristics of the sensor did not change even after soaking in water. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：124 / 129

页数：6

共 14 条

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