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수정진동자를 이용한 NaF의 결정화에 관한 연구
Study on the Crystallization of NaF using Quartz Crystal Analyzer
Sung-Woong Han
Se-Young Son
Seong-Hun Song
Jong-Min Kim1
Woo-Sik Kim2
Hiroshi Muramatsu1
Sang Mok Chang†
동아대학교 공과대학 화학공학과, 부산 604-714 1일본 세이코 연구소 연구개발센터, Chiba 270-2222 2경희대학교 공과대학 화학공학과, 용인 449-701
Department of Chemical Engineering, Dong-A University, Pusan 604-714, Korea 1R&D Center, Seiko Instruments Inc.,, Chiba 270-2222, Japan 2Department of Chemical Engineering, Kuyng-Hee University, Yongin 449-701, Korea
smjang@mail.donga.ac.kr
HWAHAK KONGHAK, December 2002, 40(6), 659-663(5), NONE
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Abstract
에틸알코올의 첨가로 과포화가 유도되는 NaF 결정화 과정을 수정진동자를 이용하여 측정하였다. 준안정 상태의 NaF 용액에 에틸알코올을 첨가하면 NaF의 용해도가 감소하여 NaF 과포화가 형성되어 결과적으로 NaF 결정이 생성 및 성장한다. NaF 용액의 과포화에서 결정 생성 및 성장하는 변화를 감지하기 위하여 수정진동자의 금전극 표면을 염산시스테아민(cysteamine hydrochloride; 2-mercaptoethylamine hydrochloride)으로 self-assembly하여 수식하여 응용 가능성을 검토하였다. 과포화 과정을 통해 생성된 NaF 결정이 염산시스테아민 표면 위에 흡착되면 흡착된 양에 비례하여 수정진동자 주파수가 변화하기 때문에 주파수 변화를 측정함으로써 간접적으로 NaF 결정과정을 분석할 수 있었다. 알코올의 주입량을 1-5 ml로 변화시킴으로써 용액 중에 형성되는 NaF의 과포화 농도의 수준을 변화시켜 주었으며, 염산시스테아민 박막에 대한 주파수 변화를 분석함으로써 주입량에 따른 NaF 결정화 정도를 해석할 수 있었다. 이들 결과들을 통하여 수정진동자를 이용한 NaF 결정화 과정의 분석이 가능함을 알 수 있었다.
The crystallization of NaF driven by adding ethanol was monitored using quartz crystal analyzer (QCA). Adding ethanol to NaF solution reduced the solubility of NaF and consequently led to nucleation and growth of NaF crystals. To investigate the crystallization behavior of NaF, a gold electrode of QCA was modified by anchoring with 2-mercaptoethylamine hydrochloride based on a self-assembly method. Frequency of QCA varied with the amount of NaF adsorbed on the selfassembled layer of 2-mercaptoethylamine hydrochloride, and thereby the process of NaF crystallization could be analyzed indirectly by monitoring the frequency change of QCA. To change the extent of supersaruration of NaF, the amount of ethanol added to the solution was varied from 1 to 5 ml. Then, the effect of the extent of the supersaturation on the crystallization was examined by analyzing the frequency changes of QCA coated with 2-mercaptoethylamine hydrochloride. It was shown that the QCA technique could be well applied for the characterization and analysis of the crystallization behavior of NaF.
Keywords
References
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Shons H, Dorman F, Najarian J, J. Biomed. Mater. Res., 6, 565 (1972)
Muramatsu H, Dick JM, Tamiya E, Karube I, Anal. Chem., 59, 2760 (1987)
Itaya K, Ataka T, Toshima S, J. Am. Chem. Soc., 104, 4767 (1982)
Chang SM, Muramatsu H, Biotechnol. News, 2, 60 (1995)
Grabbe ES, Buck RP, Melroy OR, J. Electroanal. Chem., 59, 2760 (1987)
Bruckenstein S, Shay M, J. Electroanal. Chem., 280, 73 (1985)
Song SH, Kim JM, Han DS, Park JY, Park JS, Chang SM, J. Korean Ind. Eng. Chem., 10(5), 784 (1999)
Lee HJ, Cho HS, Park JY, Chang SM, Kim JM, HWAHAK KONGHAK, 38(4), 443 (2000)
Cho HS, Han DS, Park JY, Lee HJ, Park JS, Kim K, Chang SM, J. Korean Sens. Soc., 9, 28 (2000)
Jones JL, Mjeure JP, Anal. Chem., 41, 484 (1969)
Sauerbrey G, Z. Phyzik., 155, 206 (1959)
Muramatsu H, Suda M, Ataka T, Seki A, Tamiya E, Karube I, Sens. Actuators A-Phys., 21-23, 362 (1990)
Ye X, Muramatsu H, Kimura K, Sakuhara T, Ataka T, J. Electroanal. Chem., 314, 279 (1991)
Kanazawa KK, Gordon JG, Anal. Chim. Acta, 175, 99 (1985)
Muramatsu H, Tamiya E, Karube I, Anal. Chem., 60, 2142 (1988)
Kim JM, Chang SM, Muramatsu H, Polymer, 40(12), 3291 (1999)
Landau LD, Lifshitz EM, "Fluid Mechanics," Pentagon, Oxford, England (1959)
Lee YJ, Jeon TC, Paik WK, Kim K, Langmuir, 12(24), 5830 (1996)
Guo LH, Facci JS, Mclendon G, Mosher R, Langmuir, 10(12), 4588 (1994)
Kihara T, J. Phys. Soc. Jpn., 6, 289 (1951)
Hirschfelder JO, Curtiss CF, Bird RB, "Molecular Theory of Gases and Liquids," John Wiley & Sons, 215 (1954)
Stuart HA, "Die Strukurt des Freien Molekuls," Springer, 88 (1952)
