Poly(vinylidene fluoride) 다층 필름의 제조 및 특성

손태원; 김종환; 최원미; 한비비; 권오경; Tae-Won Son; Jong-Hwan Kim; Won-Mi Choi; Fei-Fei Han; Oh-Kyeong Kwon

Polymer(Korea), Vol.35, No.2, 130-135, March, 2011

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Poly(vinylidene fluoride) 다층 필름의 제조 및 특성

Preparation and Properties of Poly(vinylidene fluoride) Multilayer Films

손태원^†, 김종환¹, 최원미¹, 한비비², 권오경²

영남대학교 섬유패션학부
¹영남대학교 섬유공학과
²(주)B.S.G

Tae-Won Son^†, Jong-Hwan Kim¹, Won-Mi Choi¹, Fei-Fei Han², and Oh-Kyeong Kwon²

School of Textiles, Yeungnam University, Gyeongsan 712-749, Korea
¹Department of Textile Engineering, Yeungnam University, Gyeongsan 712-749, Korea
²B.S.G. Ltd, Dae-gu, Korea

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초록

전자 기기의 빠른 발전에 따른 무선 기기들의 사용은 급격히 늘어나고 있다. 그래서 이런 제품에 자가 발전이 가능한 재료를 적용시키는 사례가 점차 늘고 있다. 여기에 사용되는 재료로서 poly(vinylidene fluoride)(PVDF)가 있는데 PVDF는 piezoelectricity를 낼 수 있는 특별한 결정구조인 β-phase를 가지고 있다. 이 논문에서는 piezoelectricity에 결정적인 영향인 β-phase 함량을 증가시키기 위해 다층 PVDF 필름을 제조하였다. 이 PVDF 필름은 용매인 DMAc에 10%로 용해시킨 것으로 spin rate는 850 rpm, spin time은 60초이며 건조온도는 60 ℃이다. 비교적으로 다층 필름은 단일 층보다 더 높은 β-phase함량을 나타내었다. 이 β-phase함량은 4-layer 필름이 되기까지 점차 증가되었으며 최대 함량은 7.72이다.

Along with the fast development of electronics, the demands of portable electronics and wireless sensors are growing rapidly. The need for self-powering materials capable of powering the electrical devices attached to them is increasing. The piezoelectric effect of polyvinylidene fluoride (PVDF) can be used for this purpose. PVDF has a special crystal structure consisting of a β-phase that can produce piezoelectricity. In this paper, multilayer PVDF films were fabricated to increase the β-phase content. A solution of 10% concentration N,N-dimethylacetamide (DMAc) in PVDF (PVDF/DMAc) was used to fabricate the films via spin coating technique with the following optimum process parameters: a spin rate of 850 rpm, spin time of 60 s, drying temperature of 60 ℃, and drying time of 30 min. Compared with single-layer PVDF films, the multilayer films exhibited higher β-phase content. The β-phase content of the films increased gradually with increasing number of layers until 4. Maximum ratio of β-phase content was 7.72.

Keywords:spin coating;PVDF;multilayer film;piezoelectricity.

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[Referenced By]

[1] Zheng J, He A, Li J, Han CC, Macromol.Rapid Comm., 28, 22 (2007)

[2] Tashiro K, Tadokoro H, Kobayashi M, Ferroelectrics., 32, 1 (1981)

[3] Kim BS, Sang YJ, Polymer(Korea)., 20, 2 (1996)

[4] Kamath GM, Upadhya AR, Smart Materials and Applications, REACH Symposium., Bangalore, March 7-10, p.2 (2007)

[5] Sajkiewicz P, Wasiak A, Goclowski Z, Eur. Polym. J., 35, 3 (1998)

[6] Kymissis J, Kendall C, Paradiso J, Parasitic Power Harvesting in Shoes, Physics and Media Group MIT Media Laboratory, August (1998)

[7] Granstrom J, Feenstra J, Sodano HA, Farinholt K, Smart Mater. Struct., 16, 1810 (2007)

[8] Sodano HA, Inman DJ, JIMSS., 16, 10 (2005)

[9] Sodano HA, Park G, Inman DJ, An International J.Experimental Mechanics., 40, 2 (2004)

[10] Sodano HA, Inman DJ, Park GH, The Shock and Vibration Digest., 36, 3 (2004)

[11] Klimiec E, Zaraska W, Zaraskak K, Microelectronics Reliability., 48, 6 (2008)

[12] Yiquan Y, Binwen S, Zongjie L, IEEE T Ultrason. Ferr. and Frequency Control., 42, 5 (1995)

[13] Tasaki I, Byrne PM, Masumura M, Jpn. J. Physiol., 37, 4 (1987)

[14] Hwa B, Kim BC, J. Korean Fiber Soc., 41, 6 (2004)

[15] Benz M, Euler WB, Gregory OJ, Macromolecules., 35, 7 (2002)

[16] http://www.clean.cise.columbia.edu/process/spintheory.pdf.

[17] Zhao Z, Li J, Yuan X, Li X, J. Appl. Polym. Sci., 97, 2 (2004)

[18] Benedetti E, Catanorchi S, Alessio AD, Polym. Inter., 41, 1 (1996)

[19] Jiang Y, Ye Y, Yu J, Wu Z, Polym. Eng. Sci., 47, 9 (2007)

[20] Nasir M, Matsumoto H, J. Polym. Sci. Part B: Polym. Phys., 44, 5 (2006)

[21] Choi SW, Kim JR, Ahn YR, Jo SM, Chem.Mater., 19, 1 (2007)

[22] Samatham R, Kim KJ, Polym. Eng. Sci., 46, 7 (2006)

[23] Gregorio RJ, Cestari M, J. Polym. Sci. Part B: Polym.Phys., 32, 5 (1994)

[24] Kim BC, Choi CG, Han SP, Polymer(Korea)., 26, 4 (2002)