Fabrication of a Conjugated Fluoropolymer Film Using One-Step iCVD Process and its Mechanical Durability

Most superhydrophobic surface fabrication techniques involve precise manufacturing process. We suggest initiated chemical vapor deposition (iCVD) as a novel CVD method to fabricate sufficiently durable superhydrophobic coating layers. The proposed method proceeds with the coating process at mild tem...

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Bibliographic Details
Published inCoatings (Basel) Vol. 9; no. 7; p. 430
Main Authors Lee, Hyo Seong, Kim, Hayeong, Lee, Jeong Heon, Kwak, Jae B.
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 2019
Subjects
Abrasion
Chemical vapor deposition
Coating
Contact angle
Cotton
Cotton fabrics
Covalent bonds
Crosslinking
Durability
Fluoropolymers
Hydrophobic surfaces
Hydrophobicity
Polymer films
Polymerization
Polymers
Process parameters
Silicon wafers
Substrates
Thin films
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Summary:Most superhydrophobic surface fabrication techniques involve precise manufacturing process. We suggest initiated chemical vapor deposition (iCVD) as a novel CVD method to fabricate sufficiently durable superhydrophobic coating layers. The proposed method proceeds with the coating process at mild temperature (40 °C) with no need of pretreatment of the substrate surface; the pressure and temperature are optimized as process parameters. To obtain a durable superhydrophobic film, two polymeric layers are conjugated in a sequential deposition process. Specifically, 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane (V4D4) monomer is introduced to form an organosilicon layer (pV4D4) followed by fluoropolymer formation by introducing 1H, 1H, 2H, 2H-Perfluorodecyl methacrylate (PFDMA). There is a high probability of covalent bond formation at the interface between the two layers. Accordingly, the mechanical durability of the conjugated fluoropolymer film (pV4D4-PFDMA) is reinforced because of cross-linking. The superhydrophobic coating on soft substrates, such as tissue paper and cotton fabric, was successfully demonstrated, and its durability was assessed against the mechanical stress such as tensile loading and abrasion. The results from both tests confirm the improvement of mechanical durability of the obtained film.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings9070430