Journal of Adhesion and Interface (접착 및 계면)

The Society of Adhesion and Interface, Korea (한국접착및계면학회)
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The Effects of PCM Capsule Sizes on the Properties of Acrylic Coatings

PCM 캡슐의 크기가 아크릴 코팅의 물성에 미치는 영향

  • Hur, Soon-Ryoung (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Sung-Goo (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Choi, Kil-Yeong (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Lee, Jae Heung (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Hong, Geun-Hye (Department of Materials Engineering, Kong-ju National University) ;
  • Kim, Hyung-Joong (Department of Materials Engineering, Kong-ju National University)
  • 허순령 (한국화학연구원 화학소재연구부) ;
  • 이성구 (한국화학연구원 화학소재연구부) ;
  • 최길영 (한국화학연구원 화학소재연구부) ;
  • 이재흥 (한국화학연구원 화학소재연구부) ;
  • 홍근혜 (공주대학교 재료공학과) ;
  • 김형중 (공주대학교 재료공학과)
  • Received : 2005.01.09
  • Accepted : 2005.02.25
  • Published : 2005.03.30
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Abstract

The capsules were prepared from a phase change material (PCM) of octadecane as a core material and melamine formaldehyde resin as a shell material. The PCM capsule size was varied in the range of $3{\sim}25{\mu}m$. The core contents and sizes of the PCM capsule, were determined by DSC and SEM, respectively. An acrylic coating material which contains butyl acrylate (BA), methyl metacrylate (MMA) and acrylic acid (AA) were synthesized by emulsion polymerization. The films were prepared from the acrylic emulsion and PCM capsules which have various capsule sizes. From the results of SEM experiment, it was observed that the PCM capsules were well dispersed inside the film and the surface of the film became less rough when the PCM capsule size was small. The swelling ratio of the films were not significantly affected by the PCM capsule size. However, the tensile strength and elongation of the films were greatly decreased with increasing the PCM capsule size.

심물질(core)이 상변화물질(Phase Change Material, PCM)이고, 벽물질(shell)이 멜라민 포름알데히드 수지인 마이크로 캡슐을 제조하였다. 제조된 캡슐의 크기가 아크릴 코팅(acrylic coating)의 물성에 미치는 영향을 알아보기 위하여 PCM 캡슐의 크기를 $3{\sim}25{\mu}m$로 조절하여 제조하였다. 제조된 캡슐의 심물질 함량과 캡슐의 크기는 DSC와 SEM을 이용하여 확인하였다. 아크릴 에멀젼은 butyl acrylate, methyl metacrylate와 acrylic acid를 공중합하여 제조하였다. 제조된 PCM 캡슐과 아크릴 에멀젼을 혼합하여 필름으로 제조하였다. 캡슐의 크기가 작을수록 아크릴 코팅 필름 내에 캡슐이 잘 분산됨을 확인할 수 있었고, 캡슐의 크기가 클수록 필름 표면이 매끄럽지 않음을 관찰할 수 있었다. 필름의 수분 흡수율은 PCM 캡슐의 크기에 큰 영향을 받지 않았지만 필름의 인장 강도와 신율은 캡슐의 크기가 작을수록 증가하였다.

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