Choi, Seung Eun Kim, Sung-Soo Choi, Eunji Kim, Ji Hoon Choi, Yunkyu Kang, Junhyeok Kwon, Ohchan Kim, Dae Woo 2024-01-19T15:00:27Z 2024-01-19T15:00:27Z 2021-09-05 2021-05 2045-2322 https://pubs.kist.re.kr/handle/201004/117077 A layered graphene oxide/ethylenediamine (GO/EDA) composite film was developed by exposing aqueous GO liquid crystal (GOLC) coating to EDA vapor and its effects on the gas barrier performance of GO film were systematically investigated. When a GO/EDA coating with a thickness of approximately 1 mu m was applied to a neat polyethylene terephthalate (PET) film, the resultant film was highly impermeable to gas molecules, particularly reducing the gas permeance up to 99.6% for He and 98.5% for H-2 in comparison to the neat PET film. The gas barrier properties can be attributed to the long diffusion length through stacked GO nanosheets. The EDA can crosslink oxygen-containing groups of GO, enhancing the mechanical properties of the GO/EDA coating with hardness and elastic modulus values up to 1.14 and 28.7 GPa, respectively. By the synergistic effect of the viscoelastic properties of GOLC and the volatility of EDA, this coating method can be applied to complex geometries and EDA intercalation can be spontaneously achieved through the scaffold of the GOLC. English Nature Publishing Group Diamine vapor treatment of viscoelastic graphene oxide liquid crystal for gas barrier coating Article 10.1038/s41598-021-88955-5 1 Scientific Reports, v.11, no.1 Scientific Reports 11 1 Y scie scopus 000656361800029 2-s2.0-85105157335 Multidisciplinary Sciences Science & Technology - Other Topics Article MULTILAYER FILMS COMPOSITE FILM CROSS-LINKING MEMBRANES PERFORMANCE FABRICATION NANOCOMPOSITE PERMEATION WATER ETHYLENEDIAMINE