초소수성 표면특성을 갖는 폴리프로필렌 박막형성

박재남; 신영식; 이원규; Jae Nam Park; Young Sik Shin; Won Gyu Lee

Applied Chemistry for Engineering, Vol.25, No.6, 598-601, December, 2014

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초소수성 표면특성을 갖는 폴리프로필렌 박막형성

Formation of Polypropylene Thin Films with Superhydrophobic Surface

박재남, 신영식, 이원규 ^†

강원대학교 화학공학과

Jae Nam Park, Young Sik Shin, and Won Gyu Lee^†

Department of Chemical Engineering, Kangwon National University, Kangwon 200-701, Korea

E-mail:

초록

Polypropylene의 농도와 코팅 막의 건조 온도 및 나노실리카의 첨가량의 변화 등 polypropylene 박막 제조를 위한 공정변수들이 박막의 표면 형상 및 특성에 미치는 영향을 연구하였다. Polypropylene의 농도가 30 mg/mL인 경우에 30 ℃의 건조 온도로 90 min 동안 93 mTorr의 진공 조건으로 최대 접촉각 154°를 갖는 초소수성 polypropylene 박막을 얻을 수 있었다. 용매 휘발을 위한 진공 오븐에서의 건조 온도가 증가함에 따라 박막의 거칠기가 감소하여 접촉각이 낮아지는 효과를 가져왔다. Polypropylene-실리카 복합막은 박막 내에 나노실리카의 함유량의 증가에 따라 박막 표면이 미세 다공성 구조에서 미세 구형 구조물로 변환되면서 접촉각의 증가로 초소수성 표면 특성을 보였다.

The effects of process parameters for the formation of polypropylene film such as the polypropylene concentration in the solution, drying temperature for coating film, and variation of nano-silica content on the surface structure and property of polypropylene film have been studied. A super-hydrophobic polypropylene film with a maximum contact angle of 154° was obtained at the condition of a polypropylene concentration of 30 mg/mL, a drying temperature of 30 ℃, a drying pressure of 93 mtorr for 90 min. The increase of a drying temperature reduced the contact angle by enhancing the surface smoothness of the film. The increase of nano-silica content in the composite film composed of polypropylene and silica changed the surface shape from microporous to microglobular, which led to increasing the contact angle and showed the super-hydrophobic surface property.

Keywords:Polypropylene solution;superhydrophobicity;surface property;surface roughness;thin film

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[1] Jiang L, Wang R, Yang B, Li TJ, Tryk DA, Fujishima A, Hashimoto K, Zhu DB, Pure Appl. Chem., 72, 73 (2000)

[2] Nakajima A, Fujishima A, Hashimoto K, Watanabe T, Adv. Mater., 11(16), 1365 (1999)

[3] Sun T, Feng L, Gao X, Jiang L, Acc. Chem. Res., 38, 644 (2005)

[4] Liu KS, Jiang L, Nano Today, 6(2), 155 (2011)

[5] Banerjee I, Pangule RC, Kane RS, Adv. Mater., 23(6), 690 (2011)

[6] Nishino T, Meguro M, Nakamae K, Matsushita M, Ueda Y, Langmuir, 15(13), 4321 (1999)

[7] Wenzel RN, Ind. Eng. Chem., 28, 988 (1936)

[8] Cassie ABD, Baxter S, Trans. Faraday Soc., 40, 546 (1944)

[9] Sakka S, J. Sol-Gel Sci. Techn., 37, 135 (2006)

[10] Gurav AB, Latthe SS, Kappenstein C, Mukherjee SK, Rao AV, Vhatkar RS, Porous Mater., 18, 361 (2011)

[11] Son HH, Park JN, Lee WG, Korean J. Chem. Eng., 30(7), 1480 (2013)

[12] Kim TI, Baek CH, Suh KY, Seo SM, Lee HH, Small, 4, 182 (2008)

[13] Jung YC, Bhushan B, ACS Nano, 3, 4155 (2009)

[14] Troger J, Lunkwitz K, Burger W, J. Colloid Interface Sci., 194(2), 281 (1997)

[15] Lu XY, Zhang JL, Zhang CC, Han YC, Macromol. Rapid Commun., 26(8), 637 (2005)

[16] Erbil HY, Demirel AL, Avci Y, Mert O, Nature, 299, 1377 (2003)

[17] Lv YX, Yu XH, Jia JJ, Tu ST, Yan JY, Dahlquist E, Appl. Energy, 90(1), 167 (2012)

[18] Gao N, Yan YY, Chen XY, Mee DJ, Materials Letters, 65, 2902 (2011)