Note: Automatic layer-by-layer spraying system for functional thin film coatings
- Authors
- Seo, Seongmin; Lee, Sangmin; Park, Yong Tae
- Issue Date
- Mar-2016
- Publisher
- AMER INST PHYSICS
- Citation
- REVIEW OF SCIENTIFIC INSTRUMENTS, v.87, no.3
- Journal Title
- REVIEW OF SCIENTIFIC INSTRUMENTS
- Volume
- 87
- Number
- 3
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/7226
- DOI
- 10.1063/1.4945043
- ISSN
- 0034-6748
1089-7623
- Abstract
- In this study, we have constructed an automatic spray machine for producing polyelectrolyte multi-layer 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. (C) 2016 AIP Publishing LLC.
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Collections - College of Engineering > School of Mechanical Engineering > 1. Journal Articles
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