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제안 방법
- This hybrid materials have shown to be limited in improving property and phase morphology due to weak interfacial bonding between two phases, resulting from insufficient hydroxyl group capable of forming hydrogen bonding on EVOH segments. Consequently, in this study, (3-glycidoxy~propyl)-trimethoxy silane (GPTMS) as a silane coupling agent was employed during sol-gel process to prepare EVOH/SiOs hybrid coating materials with improved interfacial adhesion between organic EVOH phase and inorganic silica phase. In addition, the effects of silane coupling agent, GPTMS on the phase morphology, transparency, surface topology, and barrier property of the hybrid materials were investigated.
- In this study, ethylene-vinyl alcohol copolymer (EVOH) was used to prepare EVOH/SQ2 hybrid coating materials for the application of packaging films with barrier characteristic. The semi-crystalline EVOH resin has been widely used for the application of food packaging materials requiring gas barrier due to very high gas permeation resistance[12].
- In this study, the phase interaction in the hybrid was also evaluated by investigating the optical transparency of the hybrid materials. In general, the optical transparency of hybrid material is ass(x:iated with the of phase mon)hology which is prominently governed by the degree of microphase separation.
- properties. In this study, the phase morphology of the fractured hybrid gs was observed to evaluate the phase interaction that is associated with the occurrence of microphase separation in the hybrid system. Fig.
대상 데이터
- Tetraethoxysilane (TEOS, Acros Organics, 98%) and ethylene vinyl alcohol copolymer (EVOH, Kuraray Co., EP F101) were used as the inorganic silicate precursor and organic polymer, respectively. In order to promote interfacial adhesion between inorganic silica and organic EVOH phases, (3-glycidoxy-propyl)-trimethoxy silane (GPTMS, ACROS Organics, 97%) was used as a silane coupling agent.
이론/모형
- The oxygen permeability of the coated film was measured by permeation apparatus, which was designed and made according to the standard method of ASTM D3985 in our lalx)ratory. The detailed descriptions of the apparatus and experimental measurements were presented elsewhere[15, 16].
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