화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Clean Technology, Vol.18, No.1, 57-62, March, 2012
Export Citation
비닐트리에톡시실란으로 개질된 폴리비닐알코올 / 폴리아크릴산 필름의 내수성 및 차단성 연구
Study of Hydrophobic and Barrier Properties of Vinyltriethoxysilane Modified Poly (Vinyl Alcohol) / Poly (Acrylic Acid) Films
김은지, 박재형, 백인규†
  • 한국신발피혁연구소, 614-110 부산광역시 부산진구 당감동 786-50
Eun Ji Kim, Jae Hyung Park, and In Kyu Paik†
  • Korea Institute of Footwear & Leather Technology, 786-50 Dang-gam-dong, Busan-jingu, Busan 614-110, Korea
E-mail:
초록
폴리비닐알코올(PVA)을 증류수를 사용하여 용액으로 만든 후, 소수성을 가지는 비닐트리에톡시실란 (VTEOS)을 이용하여 개질하였다. 실란으로 개질된 PVA 용액에 폴리아크릴산(PAA)을 함량별로 넣어 제조하였다. 다양한 PAA 함량에 따라 제조된 필름으로 열적-기계적 성질, 접촉각, 수분 투과율, 산소 투과율을 측정하였다. 필름의 유리 전이 온도는 비닐트리에톡시실란으로 개질한 경우 약간 높아졌으나, PAA의 함량에 따른 변화는 크게 나타나지 않았다. 비닐트리에톡시실란으로 개질된 PVA/ PAA 필름의 인장 강도는 9.48~10.72 kg/mm2으로 PVA와 큰 차이가 나지 않았다. 비닐트리에톡시실란으로 개질된 PVA와 PAA의 비율이 90/10인 필름의 경우 팽윤도 198%, 용해도 10%로 측정되어 PVA에 비하여 내수성이 개선되었음을 확인할 수 있었다. 또한, 비닐트리에톡시실란으로 개질된 PVA와 PAA의 비율이 90/10인 필름(두께 2.5 μm)을 PET 필름(두께 50 μm) 위에 코팅하여 제조된 필름의 수분 투과율과 산소 투과율은 각각 11.04 g/m2/day와 3.1 cc/m2/day로 측정되었다.
Aqueous poly (vinyl alcohol) (PVA) solution was modified by using hydrophobic vinyltriethoxysilane (VTEOS) and then adding different amounts of poly (acrylic acid) (PAA) to the resulting solution. Thermal and mechanical properties, contact angle, water vapor transmission rate (MVTR) and oxygen gas transmission rate (O2TR) of the film samples fabricated by these solutions were investigated. The glass transition temperature (Tg) of the VTEOS-modified films was sightly increased and the value remained unchanged according to the amount of PAA. The tensile strength of the VTEOS-modified films was found to be 9.48~10.72 kg/mm2 which showed no significant difference compared with that of PVA. The film prepared with VTEOS-modified PVA/PAA (= 90/10), of which the swelling and solubility were measured to be 198% and 0%, respectively, showed improved water-resistance. The MVTR and O2TR for the PET film (thickness 50 μm) coated with VTEOS-modified PVA/PAA (= 90/10) film (thickness 2.5 μm) were measured to be 11.04 g/m2/day and 3.1 cc/m2/day, respectively.
Keywords:Poly (Vinyl Alcohol);Poly (Acrylic Acid);Vinyltriethoxysilane;Barrier film
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