121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-426
Subject Insect cuticle mimetic protective coating at the biological interface in extreme environment
Authors Hong Park, Seonki Hong1,*, Haeshin Lee2,*
Korea Advanced Institute of Science and Technology, Canada
1Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology, Korea
2Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea
Abstract Surface of an organism is an important factor for maintaining stability by forming a barrier between the internal environment and the external environment. Usually this barrier is satisfactory for most external environments, but extreme environments such as vacuum space can cause these natural barriers to be insufficient and deteriorate. We propose an insect cuticle mimetic protective coating at the biological interface to be able to withstand extreme environment. The key components of the insect cuticle mimetic protective coating were pyrogallol, a polyphenol derivative that is abundantly found in plants, and polyethylenimine (PEI), an amine rich polymer chain. These two materials mimic chemical formation of insect cuticle by oxidation of pyrogallol in presence of air to form quinone groups, which react readily with the amines of PEI, forming a PG/PEI film only at the oxygen interface. Usage of this PG/PEI on soft sample readies it immediately for vacuum experiments such as SEM due to the swift formation of insect cuticle mimetic film on the surface of the sample.
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