Humidity Sensitivity of Hybrid Polyelectrolytes Prepared by the Sol-Gel Process

Chil-Won Lee; Hyung-Seok Park; Jong-Gyu Kim; Myoung-Seon Gong

Macromolecular Research, Vol.13, No.2, 96-101, April, 2005

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Humidity Sensitivity of Hybrid Polyelectrolytes Prepared by the Sol-Gel Process

Chil-Won Lee, Hyung-Seok Park, Jong-Gyu Kim, and Myoung-Seon Gong^†

Department of Chemistry, Dankook University, Cheonan, Chungnam 330-714, Korea

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Thin-film humidity sensors were prepared using inorganic/organic hybrid polyelectrolytes, which were prepared from the sol-gel reaction of copolymers of [2-(methacryloyloxy)ethyl]dimethylpropylammonium bromide (MEPAB), n-butyl methacrylate (BMA), and 3-(trimethoxysilyl)propyl methacrylate (TSPM) with tetraethyl orthosilicate (TEOS). The humidity-sensitive polyelectrolytes were composed of the copolymers having the following mole ratios of MEPAB, BMA, and TSPM: 60/30/10, 55/30/15, and 50/30/20. We found that the impedance varied with the content of MEPAB or TEOS; it ranged from 107 to 103Ω between 20 and 95% relative humidity, which is the range required for a humidity sensor operating at ambient humidity. In addition we investigated a number of characteristics of these humidity sensors, such as their hysteresis, response time, temperature dependence, frequency dependence, water durability, and long-term stability.

Keywords:humidity sensor;TEOS;polyelectrolyte;organic/inorganic hybrid;cross-linking;copolymer.

[References]

Sakai Y, Sadaoka Y, Matsuguchi M, Sens. Actuators B-Chem., 35, 85 (1996)
Hijikigawa M, Miyosh S, Sugihara T, Jinda A, Sens. Actuators, 4, 307 (1983)
Sakai Y, Sadaoka Y, Hukumoto H, Sen. Actuators, 13, 243 (1988)
Sakai Y, Matsuguchi M, Hurukawa T, Sens. Actuators B-Chem., 66, 135 (2000)
Lee CW, Rhee HW, Gong MS, Synth. Met., 106, 177 (1999)
Paek JS, Gong MS, Korean J. Mater. Res., 5, 715 (1995)
Gong MS, Joo SW, Choi BK, J. Mater. Chem., 12, 902 (2002)
Sakai Y, Sadaoka Y, Matsuguchi M, Kanakura Y, Tamura M, J. Electrochem. Soc., 138, 2474 (1991)
Sakai Y, Sadaoka Y, Ikeuchi K, Sens. Actuators, 9, 125 (1986)
Sakai Y, Matsuguchi M, Sadaoka Y, Hirayama K, J. Electrochem. Soc., 140, 432 (1993)
Lee CW, Kim O, Gong MS, J. Appl. Polym. Sci., 89(4), 1062 (2003)
Lee CW, Rhee HW, Gong MS, Sens. Actuators B-Chem., 73, 124 (2001)
Lee CW, Gong MS, Sens. Actuators B-Chem., 11, 322 (2003)
Lee CW, Park HS, Gong MS, Macromol. Res., 12(3), 311 (2004)
Lee CW, Gong MS, Macromol. Res., 11(5), 322 (2003)
Lee CW, Choi BK, Gong MS, Analyst, 129, 651 (2004)
Lee CW, Joo SW, Gong MS, Sens. Actuators B-Chem., in press.
Wei Y, Jin DL, Wei G, Yang DC, Xu JG, J. Appl. Polym. Sci., 70(9), 1689 (1998)
Wei Y, Wang W, Yeh JM, Wang B, Yang D, Murray JK, Jin J, Wei G, Hybrid Organic-Inorganic Composite, J. E. Mark, C. Y. C. Lee, and V. A. Bianconi, Eds., ACS. Symp. Ser. 585, American Chemical Society, Washington DC, p 125 (1995)
Jang J, Bae J, Kang D, J. Appl. Polym. Sci., 82(9), 2310 (2001)
Su PG, Chen IC, Wu RJ, Anal. Chim. Acta, 449, 103 (2001)
Balbshev VN, Anderson KL, Sinsawat A, Farmer BL, Donly MS, Prog. Org. Coat., 47, 337 (2003)
Kim TM, Park JK, Lee RY, Gong MS, J. Mater. Res., 3, 598 (1993)

[Referenced By]

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[1] Sakai Y, Sadaoka Y, Matsuguchi M, Sens. Actuators B-Chem., 35, 85 (1996)

[2] Hijikigawa M, Miyosh S, Sugihara T, Jinda A, Sens. Actuators, 4, 307 (1983)

[3] Sakai Y, Sadaoka Y, Hukumoto H, Sen. Actuators, 13, 243 (1988)

[4] Sakai Y, Matsuguchi M, Hurukawa T, Sens. Actuators B-Chem., 66, 135 (2000)

[5] Lee CW, Rhee HW, Gong MS, Synth. Met., 106, 177 (1999)

[6] Paek JS, Gong MS, Korean J. Mater. Res., 5, 715 (1995)

[7] Gong MS, Joo SW, Choi BK, J. Mater. Chem., 12, 902 (2002)

[8] Sakai Y, Sadaoka Y, Matsuguchi M, Kanakura Y, Tamura M, J. Electrochem. Soc., 138, 2474 (1991)

[9] Sakai Y, Sadaoka Y, Ikeuchi K, Sens. Actuators, 9, 125 (1986)

[10] Sakai Y, Matsuguchi M, Sadaoka Y, Hirayama K, J. Electrochem. Soc., 140, 432 (1993)

[11] Lee CW, Kim O, Gong MS, J. Appl. Polym. Sci., 89(4), 1062 (2003)

[12] Lee CW, Rhee HW, Gong MS, Sens. Actuators B-Chem., 73, 124 (2001)

[13] Lee CW, Gong MS, Sens. Actuators B-Chem., 11, 322 (2003)

[14] Lee CW, Park HS, Gong MS, Macromol. Res., 12(3), 311 (2004)

[15] Lee CW, Gong MS, Macromol. Res., 11(5), 322 (2003)

[16] Lee CW, Choi BK, Gong MS, Analyst, 129, 651 (2004)

[17] Lee CW, Joo SW, Gong MS, Sens. Actuators B-Chem., in press.

[18] Wei Y, Jin DL, Wei G, Yang DC, Xu JG, J. Appl. Polym. Sci., 70(9), 1689 (1998)

[19] Wei Y, Wang W, Yeh JM, Wang B, Yang D, Murray JK, Jin J, Wei G, Hybrid Organic-Inorganic Composite, J. E. Mark, C. Y. C. Lee, and V. A. Bianconi, Eds., ACS. Symp. Ser. 585, American Chemical Society, Washington DC, p 125 (1995)

[20] Jang J, Bae J, Kang D, J. Appl. Polym. Sci., 82(9), 2310 (2001)

[21] Su PG, Chen IC, Wu RJ, Anal. Chim. Acta, 449, 103 (2001)

[22] Balbshev VN, Anderson KL, Sinsawat A, Farmer BL, Donly MS, Prog. Org. Coat., 47, 337 (2003)

[23] Kim TM, Park JK, Lee RY, Gong MS, J. Mater. Res., 3, 598 (1993)