• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.285-288
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• 2002

옥타데칸[$CH_3$[C $H_2$]$_{l6}$$CH_3$]은 상전이 물질(phase change material)이며, 상전이 물질은 상변화를 통해 주변의 온도가 상승하면 녹으면서 열을 흡수하고, 주변의 온도가 낮아지면 결정화(crystallization)하면서 열을 방출하는 축열ㆍ방열성을 반복적으로 나타내는 에너지 물질(enthalpic substance)이다[1, 2]. 옥타데칸은 메탄계열 탄화수소로서 파라핀류(paraffins)에 해당된다. (중략)략)

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2008.10a
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• pp.151-152
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• 2008

PCM has the ability to change their state, these materials absorb energy during the heating process as a body contact and release energy during a reverse cooling process as phase change take place. Using the thermal energy storage of PCM which has a melting point 15 to $35^{circ}C$ is one of the most effective ideas for utilization in textile finish. In this study, microencapsulated PCM(MCPCM) were synthesized by sol-gel method using the octadecane(or nonadecane) as PCM and the silica as microcapsule materials. To develop smart temperature adaptable textile, coating process was applied to textile substrate using a composition included MCPCM.

• Journal of the Korean Chemical Society
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• v.42 no.5
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• pp.565-569
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• 1998

• Textile Coloration and Finishing
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• v.22 no.3
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• pp.214-219
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• 2010

Polyethylene(PE) films were photocrosslinked by continuous UV irradiation. Benzophenone addition as low as 1wt% into the PE film increased the gel fraction up to 96%. The photocrosslinking was attributed to the recombination of PE radicals generated upon UV irradiation, which was enhanced by the hydrogen abstraction of the added benzophenone. Also the crossliked PE showed higher thermal stability and decreased crystallinity with increasing UV energy as shown by TGA, XRD and DSC analysis. It was also possible to fix 5.4% octadecane into PE by the photocrosslinking. The crosslinked PE film containing octadecane showed lower tensile strength and modulus coupled with higher extension compared to that without octadecane, which can be used as a new plasticizing method for the crosslinked PE film.

• Journal of the Korean Solar Energy Society
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• v.35 no.1
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• pp.89-96
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• 2015

n-octadecnae based shape stabilized phase change material (SSPCM) was prepared by using vacuum impregnation method. And an exfoliated graphite nanoplate (xGnP) which has high thermal conductivity properties is used as a PCM container. And then we made heat storage concretes which contains SSPCM for reducing heating and cooling load in buildings. In the prepararion process, the SSPCM was mixed to a concrete as 10, 20 and 30wt% of cement weight. The thermal properties and chemical properties of heat storage concrete were analyzed from Scanning electron microscope (SEM), Fourier transformation infrared spectrophotometer (FT-IR), Deferential scanning calorimeter (DSC), Thermogravimetric analysis (TGA) and TCi thermal conductivity analyzer. And we conducted surface temperature analysis of SSPCM and xGnP by using heat plate and insulation mold.

• Applied Chemistry for Engineering
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• v.16 no.4
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• pp.542-548
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• 2005

The self-assembled monolayers (SAMs) of perfluorocarboxylic acids were fabricated on several metal oxide powders. Perfluorododecanoic acid and perfluorooctadecanoic acid were used to study the effect of chain length on SAM. Alumina, Tantalia, Titania, and Zirconia were the metal powders used. The formation of the SAMs was confirmed by DRIFT(Diffuse Reflectance Infrared Fourier Transform) spectroscopy. Since the perfluorohydrocarbons are well known for their hydrophobicity, the resulting monolayers are also expected to have high hydrophobicity. The quality of DRIFT spectra of SAMs was dependent on the powder size as well as the element of metal oxides.

• Journal of the Korean Chemical Society
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• v.35 no.5
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• pp.527-533
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• 1991

Template condensation reactions of formaldehyde with appropriate tetramines and diamines in the presence of N(II) or Cu(II) ion produce square planar complexes of hexaaza macrotricyclic and macrotetracyclic ligands $[M(L)]^{2+}$(M = Ni(II) or Cu(II); L = 4-methyl-1,3,6,8,11,14-hexaazatricyclo[12,2,1,$1^{8,11}$]octadecane(C), 1,3,10,12,15,18-hexaazatetracyclo[16,2,1,$1^{12,15},0^{4,9}]$docosane(D) 4-methyl-1,3,6,8,12,15-hexaazatricyclo[13,3,1,$1^{8,12}$]eicosane(F), or 1,3,10,12,16,19-hexaazatetracyclo[l7,3,1,$1^{12,16},0^{4,9}]$tetracosane(G). These complexes contain two 1,3-diazacyclopentane or 1,3-diazacyclohexane rings in the six-membered chelate rings. The complexes of C and F contain one methyl group and those of D and G one cyclohexane ring in the five-membered chelate ring. Synthesis and characterization of the Ni(II) and Cu(II) complexes are presented. The effects of the ligand structure on the equilibrium $[Ni(L)]^{2+}2H_2O{\rightleftharpoons}[Ni(L)(H_2O)_2]^{2+}$ in aqueous solutions are described.