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Preparation and characterization of superhydrophobic hybrid coatings based on polyurethane/silica nanoparticles

Title
Preparation and characterization of superhydrophobic hybrid coatings based on polyurethane/silica nanoparticles
Other Titles
폴리우레탄/실리카 나노입자를 기반으로 한 초소수성 하이브리드 코팅의 제조 및 특성
Author
Soo-Bin Kim
Advisor(s)
장영욱
Issue Date
2019-02
Publisher
한양대학교
Degree
Master
Abstract
Superhydrophobic coatings based on polyurethane/silica nanoparticle hybrids were fabricated onto a cotton fabric by spraying a mixture of modified silica nanoparticles with poly(tetramethylene glycol)(PTMG) and polyisocyanate onto the fabric and a subsequent curing at 80℃. Surface modification of silica was carried out by polydopamine(PDA) coating followed by treating it with dodecyl amine or octadecyl amine. The coated fabrics were characterized using water-contact angle measurement and SEM analysis. The hydrophobicity of the cured PU/modified SiO2 coatings can be affected by the alkyl chain length of the modified silica. The coated fabrics exhibit superhydrophobicity with a water contact angle of over 160 ° along with excellent self-cleaning and water/oil separation ability. Further, the coated fabric exhibited deicing performance by photothermal effect. These effecs was also revealed that such superhydrophobicity was maintained after repeated mechanical abrasion using a sandpaper.
URI
http://dcollection.hanyang.ac.kr/common/orgView/000000108691http://repository.hanyang.ac.kr/handle/20.500.11754/99633
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Theses(Master)
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