Kang, Dong-Gue Park, Minwook Kim, Dae-Yoon Goh, Munju Kim, Namil Jeong, Kwang-Un 2024-01-20T03:01:38Z 2024-01-20T03:01:38Z 2021-09-05 2016-11-09 1944-8244 https://pubs.kist.re.kr/handle/201004/123447 For the development of advanced heat transfer organic materials (HTOMs) with excellent thermal conductivities, triphenylene-based reactive discogens, 2,3,6,7,10,11-hexakis(but-3-enyloxy)triphenylene (HABET) and 4,4',4 '',4 '''',4 '''''', 4 '''''' '/(triphenylene-2,3,6,7,10,11-hexaylhexakis(oxy))hexakis(butane-l-thiol) (THBT), were synthesized as discotic liquid crystal (DLC) monomers and cross-linkers, respectively. A temperature composition phase diagram of HABET-THBT mixtures was first established based on their thermal and microscopic analyses. From the experimental results, it was realized that the thermal conductivity of DLC HTOM was strongly affected by the molecular organizations on a macroscopic length scale. Macroscopic orientation of self-assembled columns in DLC HTOMs was effectively achieved under the rotating magnetic fields and successfully stabilized by the photopolymerization. The DLC HTOM polymer-stabilized at the LC phase exhibited the remarkable thermal conductivity above 1 W/mK. When the DLC HTOM was macroscopically oriented, the thermal conductivity was estimated to be 3 W/mK along the in-plane direction of DLC molecule. The outstanding thermal conductivity of DLC HTOM should be originated not only from the high content of two-dimensional aromatic discogens but also from the macroscopically oriented and self-assembled DLC. The newly developed DLC HTOM with an outstanding thermal conductivity as well as with an excellent mechanical sustainability can be applied as directional heat dissipating materials in electronic and display devices. English American Chemical Society DISCOTIC LIQUID-CRYSTALS MAGNETIC-FIELD EPOXY-RESIN PHOTOINITIATED CYCLOPOLYMERIZATION INSULATION MATERIALS COMPOSITES ALIGNMENT PHASE MOLECULE MESOGENS Heat Transfer Organic Materials: Robust Polymer Films with the Outstanding Thermal Conductivity Fabricated by the Photopolymerization of Uniaxially Oriented Reactive Discogens Article 10.1021/acsami.6b10256 1 ACS Applied Materials & Interfaces, v.8, no.44, pp.30492 - 30501 ACS Applied Materials & Interfaces 8 44 30492 30501 scie scopus 000387737200074 2-s2.0-84994717990 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article DISCOTIC LIQUID-CRYSTALS MAGNETIC-FIELD EPOXY-RESIN PHOTOINITIATED CYCLOPOLYMERIZATION INSULATION MATERIALS COMPOSITES ALIGNMENT PHASE MOLECULE MESOGENS discotic liquid crystal reactive mesogen thiol-ene photopolymerization thermal conductivity anisotropic heat transfer