• 한국염색가공학회지
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• 제22권2호
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• pp.118-122
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• 2010

The interest in textile which has far-infrared ray emissive property has been increased in the field of biophysics and medicine. In this study, far-infrared ray emissive polyurethane nano-web was obtained using electrospinning of polyurethane(PU) solution mixed with ceramics powder and far-infrared ray emissive properties of nano-web were evaluated by measuring far-infrared ray emission power and emissivity(%). To investigate the influence of concentration of ceramics powder in PU solution and temperature for far-infrared ray emissive properties, far-infrared ray emissivity was measured at varied temperature using various nano-web including varied concentration of ceramics powder. Polyurethane nano-web was characterized by SEM to observe the deposition of ceramics powder on polyurethane nano-web surface. The far-infrared ray emissivity was increased with the concentration of ceramics powder in the nano-web. The far-infrared ray emission power was enhanced with increasing temperature of the samples; however, far-infrared ray emissivity was decreased with increasing temperature because the increase of emission power of ceramic containing nano-web was lower than the emission power of black body one.

• Journal of the Korean Wood Science and Technology
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• 제44권1호
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• pp.106-112
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• 2016

농림 부산물인 톱밥과 왕겨를 이용하여 세라믹을 제조하고 페놀수지 함침율과 탄화 온도에 따른 전기적 성질 및 원적외선 방사특성을 조사하였다. 원적외선 방사율과 방사 에너지 값은 탄화온도가 증가함에 따라 감소하였으며, 수지함침율 60%, 탄화온도 $600^{\circ}C$일 때 원적외선 방사율은 0.930, 방사에너지는 $4.32{\times}10w/m^2$로 가장 높았다. 전기저항 값은 탄화온도가 증가함에 띠라 감소하여 $1200^{\circ}C$ 이상에서는 거의 도체에 가까운 성질을 보였다. 소비전력은 수지함침율이 높을수록 전기저항의 감소와 전류의 증가로 함께 증가하였다.

• Journal of the Korean Wood Science and Technology
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• 제50권2호
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• pp.104-112
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• 2022

Indoor air quality is a very important environmental factor in modern society. However, air pollutants generated from various interior construction materials significantly affect the human body, including formaldehyde (HCHO) and volatile organic compounds that threaten public health by deteriorating indoor air quality. Effective in removing these harmful substances are porous materials, such as woodceramics. In this study, charcoal, a porous material, was added to rice husk, an agricultural by-product, and sawdust generated during the sawing process to prepare boards and ceramics at different mixing ratios, and the HCHO deodorization performance and far-infrared emission characteristics were measured. As the mixing ratio of charcoal increased, the deodorization rate of the boards and ceramics tended to increase. Overall, the deodorization rate was measured to be 80% to 90%, indicating that the boards and ceramics prepared with charcoal are suitable to be used for the purpose of deodorization. The effect of the material mixing ratio on far-infrared emissivity and emission power was insignificant.

• 공업화학
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• 제17권6호
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• pp.597-603
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• 2006

$XSiO_{2}{\cdot}YGeO_{2}$계 화합물과 $XSiO_{2}{\cdot}YNaO_{2}{\cdot}ZGeO_{2}$계 화합물을 제조하고 이들 화합물에서 $GeO_{2}$의 함량을 변화시켜 원적외선 방사율과 원적외선 방사에너지에 미치는 영향을 연구하였다. 제조된 시료의 특징은 TG-DTA, XRD, FT-IR spectrophotometer 그리고 FT-IR spectrometer에 의해 조사되었다. $XSiO_{2}{\cdot}YGeO_{2}$와 $XSiO_{2}{\cdot}YNaO_{2}{\cdot}ZGeO_{2}$계의 화합물은 $GeO_{2}$의 함량이 증가할수록 원적외선 방사율과 방사에너지가 점차적으로 증가하였다. 원적외선 방사율과 방사에너지는 $XSiO_{2}{\cdot}YGeO_{2}$계 화합물의 경우가 $XSiO_{2}{\cdot}YNaO_{2}{\cdot}ZGeO_{2}$계 화합물보다 높게 나타났다.

• Journal of the Korean Wood Science and Technology
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• 제38권6호
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• pp.480-489
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• 2010

국내 시판용 전통 목탄의 과학적인 성질 규명과 주요 기능성 분석과 이용 방안에 대한 분석을 실시하였다. 국내에서 구입 가능한 시판용 목탄의 범위 내에서 해부학적 특성, 원소 조성, 무기성분 조성, 발열량, 음이온 및 원적외선 방사량, 조습성 등의 분석을 통하여 기능성 재료로 이용 가능성에 대하여 판단하고자 하였다. 원소조성, 무기물 조성, 음이온 및 원적외선 방사량은 목탄 제조 방법과 제조회사에 따라서 큰 변이를 보였다. 특히 조습성은 흑탄의 경우 백탄이나 기계숯 보다 열등한 성능을 나타내었다. 전통숯을 기능성 재료로 사용하기 위해서는 해부학적 특성, 원소 조성, 무기물 조성, 발열량, 음이온 및 원적외선 방사량, 조습성을 분석하여 선택적 이용이 필요 할 것으로 생각한다. 또한 차후 원하는 기능에 맞는 목탄 제조 방법 기술의 개발이 필요할 것으로 생각한다.

• Journal of the Korean Wood Science and Technology
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• 제42권3호
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• pp.223-230
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• 2014

본 연구는 한지 제조과정에서 특별한 용도가 없어서 버려지는 닥나무 목질부로 밀도 및 수지첨가량별로 파티클보드를 제조하고, 이를 건축마감재로 활용 가능성을 알아보고자 탈취효과, 원적외선 방사 및 실내 공기오염물질 방사특성에 대하여 검토하였다. 측정 결과 보드의 밀도 및 수지첨가량이 증가할수록 탈취율은 증가하였다. 탈취율은 80~90%, 원적외선 방사율은 0.892~0.899로 비교적 높았다. 총휘발성유기화합물은 수지첨가율 13%, 밀도 $0.6g/cm^3$인 보드가 $0.074mg/m^2{\cdot}h$로 가장 적게 방출되었고, 폼알데하이드는 보드 제조 조건별로 $0.004{\sim}0.006mg/m^2{\cdot}h$로 미세한 방출 특성을 보였다. 이와 같이 보드 제조 조건을 다양하게 하여 용도에 맞는 보드제조가 가능하다면, 닥나무 목질부로 제조된 보드는 건축마감재 이용가능성이 있을 것으로 생각된다.

• 천문학회보
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• 제40권2호
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• pp.34.3-35
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• 2015

Recent high-resolution infrared space missions have revealed supernova remnants (SNRs) of diverse morphology in far infrared (FIR), often very different from their X-ray appearance. This suggests that the FIR emission from SNRs could be of different origins. For a sample of 20 Galactic SNRs, we examine the correlation between their FIR and X-ray properties and explore the origin of the FIR emission. We find that the SNRs with very different FIR and X-ray morphology have relatively large infrared-to-X-ray (IRX) flux ratios. We argue that the FIR emission in these SNRs is likely mainly from dust grains radiatively-heated by shock radiation. For SNRs with similar IR and X-ray morphology, the FIR emission of which is probably mostly from dust grains collisionally heated by hot plasma, we compare their IRX flux ratios with theoretical ratios from a model incorporating time-dependent dust destruction and non-equilibrium ionization cooling behind SNR shock, and discuss the implications of our result.

• 분석과학
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• 제21권4호
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• pp.279-283
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• 2008

혈토와 규사토, 맥반석, 혈토를 혼합한 물질을 $1100^{\circ}C$에서 소형 및 소결하여 원적외선 방사물질 볼로 사용하였다. 각각 제조된 볼의 방사에너지는 $8{\sim}12{\mu}m$ 파장 범위에서 상대적으로 높았다. 혼합 볼의 이온용출은 소량이고, 혼합 볼로 처리된 활성수와 에너지수의 중금속인 $Cd^{2+}$ 이온 제거능력은 높았다. 활성수와 에너지수는 음용수보다는 상대적으로 UV 차단효과가 높았다.

• 펄프종이기술
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• 제40권5호
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• pp.47-52
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• 2008

The far-infrared ray (FIR) has been applied to various fields such as medical therapy, kitchen utensils, bath supplies, and so on. The FIR-emitting agent was used to make functional paperboards to have freshness-maintaining ability. The FIR-emitting agent was diluted with different concentrations at 0.5% starch solution, and the FIR-emitting solutions were coated on paperboards, i.e., liner. The more the concentration of the FIR radiating agent increased at 0.5% cationic starch solution, the higher FIR emissivity and emission power of paperboards increased. The corrugated boxes made of paperboards coated by the FIR-radiating agents at over 5% dilution concentration endowed mandarin oranges in the boxes with greater antimicrobial activity than those in boxes made of paperboards coated by the agent at below 5% concentration. In addition, it was ascertained that treatment of the FIR agents rarely affected strength properties of paperboards.

• 천문학회보
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• 제38권1호
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• pp.53-53
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• 2013

We present preliminary results of far-infrared(FIR) study of the supernova remnant(SNR)s in the Large Magellanic Cloud using the Herschel HERITAGE (HERschel Inventory of The Agents of Galaxy Evolution) data set. HERITAGE provides FIR data covering the entire LMC at 100,160, 250, 350, and 500 um. In order to confirm FIR emission associated with SNRs, we refer to Magellanic Cloud Emission-Line Survey (MCELS) H-alpha & SII data, Spitzer surveying the Agents of a Galaxy's Evolution (SAGE) Multiband Imaging Photometer (MIPS) 24um & 70um data, Chandra Supernova Remnants Catalog, and ATCA 4.8GHz continuum images of Dickel et al. (2005). Among 47 SNRs in the LMC, 7 SNRs show associated FIR emission. We present multi-wavelength view of 5 SNRs; DEM L249, N49, N63A, N132D, and the SNR in N4. N49 and N132D show morphological correlation in FIR and X-ray, suggesting that the FIR emission is from dust grains collisionally heated by X-ray emitting plasma. The FIR emission of N63A resembles H-alpha emission, which implies that the FIR line radiation could be dominant. The FIR images of the rest two objects, DEM L249 and SNR in N4, show no correlation to the other-waveband images.