정전분무법으로 제작된 열경화성 Phenol-formaldehyde resin 코팅층의 1차원적 미세구조 형성 메카니즘

김백현; 배현정; 고유민; 권도균; Baek Hyun Kim; Hyun Jeong Bae; Yumin Goh; Do-Kyun Kwon

Korean Journal of Materials Research, Vol.26, No.9, 472-477, September, 2016

DOI10.3740/MRSK.2016.26.9.472 Export Citation

정전분무법으로 제작된 열경화성 Phenol-formaldehyde resin 코팅층의 1차원적 미세구조 형성 메카니즘

1-D Microstructure Evolution of Electrostatic Sprayed Thermosetting Phenol-formaldehyde Resin Coating

김백현, 배현정, 고유민, 권도균^†

한국항공대학교 항공재료공학과

Baek Hyun Kim, Hyun Jeong Bae, Yumin Goh, and Do-Kyun Kwon^†

Department of Materials Engineering, Korea Aerospace University, Goyan-city, Gyenggi-do 10540, Republic of Korea

E-mail:

Microstructure evolutions of thermosetting resin coating layers fabricated by electrostatic spray deposition (ESD) at various processing conditions were investigated. Two different typical polymer systems, a thermosetting phenol-formaldehyde resin and a thermoplastic polyvinylpyrrolidone (PVP), were employed for a comparative study. Precursor solutions of the phenol-formaldehyde resin and of the PVP were electro-sprayed on heated silicon substrates. Fundamental differences in the thermomechanical properties of the polymers resulted in distinct ways of microstructure evolution of the electro-sprayed polymer films. For the thermosetting polymer, phenol-formaldehyde resin, vertically aligned micro-rod structures developed when it was deposited by ESD under controlled processing conditions. Through extensive microstructure and thermal analyses, it was found that the vertically aligned micro-rod structures of phenol-formaldehyde resin were formed as a result of the rheological behavior of the thermosetting phenol-formaldehyde resin and the preferential landing phenomenon of the ESD method.

Keywords:phenol-formaldehyde resin;electrostatic spray deposition;aligned structure;DSC

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[3] Pilato L, React. Funct. Polym., 73(2), 270 (2013)

[4] Hshieh F, Beeson HD, Fire Mater., 21, 41 (1997)

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[6] Fitzer E, Schafer W, Yamada S, Carbon, 7, 643 (1969)

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[8] Tzeng SS, Chr YG, Mater. Chem. Phys., 73(2-3), 162 (2002)

[9] Xu SJ, Luo YF, Zhong W, Sol. Energy, 85(11), 2826 (2011)

[10] Jaworek A, Sobczyk AT, J. Electrost., 66, 197 (2008)

[11] Chen C, Kelder EM, Van der Put PJJM, Schoonman J, J. Mater. Chem., 6, 765 (1996)

[12] Neagu R, Perednis D, Princivalle A, Djurado E, Chem. Mater., 17, 902 (2005)

[13] Ramakrishna S, Fujihara K, Teo WE, Lim TC, Ma Z, An introduction to electrospinning and nanofibers, World Scientific Publishing Co. Pte. Ltd., Singapore (2005).

[14] Buera MDP, Levi G, Karel M, Biotechnol. Prog., 8, 144 (1992)

[15] Dominguez JC, Oliet M, Alonso MV, Rojo E, Rodriguez F, J. Appl. Polym. Sci., 123(4), 2107 (2012)

[16] Lee WI, Loos AC, Springer GS, J. Compos. Mater., 16, 510 (1982)