In this study, we have constructed an automatic spray machine for producing polyelectrolyte multilayer films containing various functional materials on wide substrates via the layer-by-layer (LbL) assembly technique. The proposed machine exhibits advantages in terms of automation, process speed, and versatility. Furthermore, it has several features that allow a fully automated spraying operation, such as various two-dimensional spraying paths, control of the flow rate and operating speed, air-assist fan-shaped twin-fluid nozzles, and an optical display. The robot uniformly sprays aqueous mixtures containing complementary (e.g., oppositely charged, capable of hydrogen bonding, or capable of covalent bonding) species onto a large-area substrate. Between each deposition of opposite species, samples are spray-rinsed with deionized water and blow-dried with air. The spraying, rinsing, and drying areas and times are adjustable by a computer program. Twenty-bilayer flame-retardant thin films were prepared in order to compare the performance of the spray-assisted LbL assembly with a sample produced by conventional dipping. The spray-coated film exhibited a reduction of afterglow time in vertical flame tests, indicating that the spray-LbL technique is a simple method to produce functional thin film coatings.
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March 2016
Brief Report|
March 30 2016
Note: Automatic layer-by-layer spraying system for functional thin film coatings
Seongmin Seo;
Seongmin Seo
1Department of Mechanical Engineering,
Myongji University
, Yongin-si, Gyeonggi-do 449-728, South Korea
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Sangmin Lee;
Sangmin Lee
a)
2School of Mechanical Engineering,
Chung-Ang University
, Seoul 156-756, South Korea
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Yong Tae Park
Yong Tae Park
b)
1Department of Mechanical Engineering,
Myongji University
, Yongin-si, Gyeonggi-do 449-728, South Korea
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a)
E-mail: [email protected]. URL: http://slee.cau.ac.kr/.
b)
E-mail: [email protected]. URL: http://home.mju.ac.kr/ytpark.
Rev. Sci. Instrum. 87, 036110 (2016)
Article history
Received:
November 27 2015
Accepted:
March 17 2016
Citation
Seongmin Seo, Sangmin Lee, Yong Tae Park; Note: Automatic layer-by-layer spraying system for functional thin film coatings. Rev. Sci. Instrum. 1 March 2016; 87 (3): 036110. https://doi.org/10.1063/1.4945043
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