In situ Shape-Stabilization of n-Octadecane PCM in Alginate Matrix through Formation of Emulsion and Solidification by Ionic Crosslinking

다국어 초록 (Multilingual Abstract)

A novel in situ shape-stabilization process of paraffinic phase change material (PCM) in alginate matrix wasinvestigated for the purpose of temperature regulating application. n-Octadecane was selected as a paraffinic PCM because ofits adequate thermal transition temperature for applying to human body. As the size control of n-octadecane in polymermatrix less than 10 μm is a core factor for textile application, oil-in-water (O/W) emulsion of n-octadecane in water wereadopted for the size control in shape-stabilization of PCM (SSPCM) in polymer matrix. The micelle size of the PCMemulsion could be controlled in the range of 3-8 μm through O/W emulsion process with high-speed stirring at 3,000-7,000 rpm and small amount of surfactant. The size of micelles in the emulsion decreased with increasing of homogenizingspeed and the amount of surfactant. It was also confirmed that the PCM micelle size was maintained in alginate-PCM hybridsolution that was prepared by mixing the O/W emulsion and aqueous sodium alginate solution. The SSPCM films containing10-30 wt% of n-octadecane in alginate could be successfully prepared by casting the hybrid solution followed by coagulatingthe cast film in aq. CaCl2 resulting solidification and insolubilization of alginate through intermolecular ionic crosslinking byCa2+. It was interesting that the shape of n-octadecane in alginate matrix was not spherical but disk shape parallel to the filmsurface. It was presumed that the discus-type shape-stabilized form of n-octadecane in alginate matrix was originated byvertical compressive force applied during rapid coagulation of the hybrid solution having very low concentration of sodiumalginate (4 wt%). The shape of paraffinic PCM stabilized in polymer matrix through O/W emulsion is expected to becontrolled when the other polymeric system with thick concentration.

참고문헌 (Reference)

• 1 J. Tabor, 5 : 1901155-, 2020
• 2 C. V. Goncalves, 172 : 42-, 2006
• 3 F. Mokhtari, 8 : 9496-, 2020
• 4 V. R. Babu, 4 : 344-, 2018
• 5 J. S. Roh, 27 : 19-, 2015
• 6 S. Mondal, 28 : 1536-, 2008
• 7 Y. Shin, 97 : 910-, 2005
• 8 A. Joulin, 88 : 2454-, 2011
• 9 D. Zhang, 81 : 653-, 2007
• 10 K. A. R. Ismail, 41 : 173-, 2000
• 11 A. F. Regin, 12 : 2438-, 2008
• 12 Y. T. Lee, 204 : 109410-, 2019
• 13 H. Li, 135 : 225-, 2014
• 14 S. Drissi, 230 : 117029-, 2020
• 15 Q. Shi, 1 : 31-, 2019
• 16 A. F. Nicholas, 10 : 15047-, 2020
• 17 Q. Al-Yasiri, 36 : 102122-, 2021
• 18 G. Peng, 2020 : 9490873-, 2020
• 19 C. Liu, 7 : 8194-, 2019
• 20 F. Jiang, 119 : 109539-, 2020
• 21 G. Zhou, 138 : 648-, 2015
• 22 N. Zhang, 82 : 505-, 2014
• 23 N. Zhu, 49 : 1722-, 2010
• 24 M. Gandhi, 12 : 9481-, 2020
• 25 I. N. Tyurin, 50 : 1-, 2019
• 26 Y. Shin, 96 : 2005-, 2005
• 27 Y. Murata, 50 : 221-, 2000
• 28 J. W. Rhim, 37 : 323-, 2004
• 29 E. Ruvinov, 96 : 54-, 2016
• 30 X. Niu, 7 : 96-, 2017
• 31 M. M. Robins, 7 : 419-, 2002
• 32 N. S. Dhaidan, 67 : 523-, 2013
• 33 Y. Li, 134 : 97-, 2019
• 34 A. M. F. Lima, 20 : 9-, 2009
• 35 M. A. Masuelli, 1 : 1-, 2014
• 36 정수광 ; 장성진 ; 임재한 ; 김희선 ; 류성용 ; 김수민, "축열 성능 향상 SSPCM 혼합 콘크리트 제조 및 열적특성 분석" 한국태양에너지학회 35 (35): 89-96, 2015
• 37 이승한 ; 이지헌 ; 채하늘 ; 민병길, "이온 가교에 의한 수용성 알긴산나트륨의 경화와 염 수용액에 의한 이의 재용해에 관한 연구" 한국섬유공학회 58 (58): 80-86, 2021