옻칠의 품등 구분 (1) 전통적인 방법에 의한 옻칠의 품등구분

노정관 ( Jeong Kwan Roh ),김윤근 ( Yun Geun Kim ) 한국목재공학회 2008 목재공학 Vol.36 No.6

한약재 찌꺼기로 제조한 한방보드의 휘발성 성분의 방출 특성

노정관 ( Jeong Kwan Roh ) 한국목재공학회 2016 목재공학 Vol.44 No.3

한약재 찌꺼기로 제조한 한방보드로부터 방출되는 향기성분을 Tenax 튜브에 흡착시킨 후 TD GC/MS에 의해 동정하고, 온도에 따른 방출특성을 검토하였다. 한방보드로부터 방출되는 휘발성 물질로는 88종이 동정되었다. 온도별로는 25℃에서 44종, 35℃에서는 55종, 45℃에서는 65종이 검출되었으며, 온도가 상승함에 따라 화합물의 수와 전체피크 면적 모두 증가하였으며, 측정한 모든 온도조건에서 검출된 향기성분은 34종이었다. 25℃에서 검출된 향기성분의 93%, 35℃에서는 92%, 45℃에서는 90%가 Hydrocarbon류의 화합물이었으며, 그 외 Ether류가 약 4%, Ketone, Aldehyde, Acid류의 물질이 소량 검출되었다. Hydrocarbons에는 17종, 11%가 monoterpenes이며, 80%, 39종이sesquiterpenes이었다. monoterpenes에는 limonene이 가장 많이 검출되었으며, sesquiterpene류의 주요 향기 물질로는 α-curcumene, zingiberene, β-elemene, β-selinene, α-amorphene, α-copaene이었다. 특히 ether화합물인 anethole (3.26%)이 모든 온도에서 비교적 많이 검출되었다. 이상의 결과에서 한약재 찌꺼기로 제조한 한방보드에는 다양한 종류의 향기성분이 다량 포함되어 있으며, 향기성분을 활용한 다양한 제품의 제조에 활용할 수 있을 것으로 생각된다. Medicine herb residues boards were manufactured by using medicine herb residues, and emission properties of volatile compounds from boards were examined under various temperature conditions. The volatile compounds were identified with analysis of TD GC/MS by absorbing their flavor components in Tenax tubes. Total 88 volatile compounds were identified from the board. The number of identified compounds at temperature conditions of 25℃, 35℃, and 45℃ were 44, 55, and 65 kinds, respectively. The number of volatile compounds and the total peak area tended to increase with an increase in the temperature. The number of the flavor components detected in all temperature conditions were 34 kinds. Hydrocarbon compounds showed 93% of the detected flavor compounds at 25℃, 92% at 35℃, and 90% at 45℃. Ether compounds accounted for 4% and ketone, aldehyde, and acid-type compounds were detected in a small quantity. The hydrocarbons were composed of 17 kinds of monoterpenes and 39 kinds of sesquiterpenes, which accounted for 11% and 80%, respectively. The most detected compound of monoterpene was limonene, and the major flavor components of sesquiterpenes were α-curcumene, zingiberene, β-elemene, β -selinene, α-amorphene, and α-copaene. Anethole (3.26%) known for ether compounds was detected considerably in all temperature conditions. The results suggest that the manufactured medicine herb residues board include various types of flavor compounds and the flavor compounds might be useful for the manufacture of various products.

벽지용 천연마늘접착제의 제조 및 접착성능

노정관 ( Jeong Kwan Roh ),이진화 ( Jin Wha Lee ) 한국 접착 및 계면학회 2011 접착 및 계면 Vol.12 No.4

옻칠의 품등 구분 (Ⅱ) 과학적 방법에 의한 옻칠의 품등 구분

노정관(Jeong-Kwan Roh),김윤근(Yun-Gun Kim) 한국가구학회 2008 한국가구학회지 Vol.19 No.5

Scientific methods for grading urushi lacquer includes general properties (viscosity, pH etc), and quantitative analysis of moisture, urushiol, gum, laccase content etc, and properties of coating layer such as set to touch drying time, gloss, color difference, delamination strength, tensile strength of film. The grading results evaluated by scientific method showed in order with chinese urushi lacquer (E) >domestic urushi lacquer (A) > japanese urushi lacquer (C) > chinese urushi lacquer (D) > domestic urushi lacquer (B). It is different from those of traditional methods. Therefore, a more accurate grading of urushi lacquer should be made by combining traditional method with scientific method.

합판용 접착제의 충전제로서 폐기 골분의 이용

고재호 ( Jae Ho Ko ),노정관 ( Jeong Kwan Roh ) 한국목재공학회 2015 목재공학 Vol.43 No.4

폐기물의 재활용을 도모하기 위해 음식점이나 정육점에서 폐기되는 뼈(골분)를 합판용 접착제의 충전제로서 이용 가능성을 검토하였다. 현재 업계에서 합판의 제조에 사용되고 있는 3종의 접착제(UMF, UF 및 PF수지)에 대해 3종의 골분(소골분, 돼지골분 및 조개골분)을 첨가하여 제조한 라티에타파인 합판의 접착성능을 기존의 소맥분과 비교하였다. 3수지에서 모두 소맥분을 전부 소골분, 돼지골분 및 조개골분으로 각각 대체한 합판의 접착성능은 상태나 습윤 강도 및 목파율 모두 소맥분 첨가 합판보다 낮았다. 따라서 소맥분을 전혀 첨가하지 않고 골분으로 모두 대체하는 것은 곤란하였다. 그러나, 소맥분의 절반을 소골분과 돼지골분으로 각각 대체하여 제조한 합판의 성능은 소맥분을 사용한 합판과 거의 동등하거나 오히려 우수한 내수성능을 발휘하여 소맥분과 병용해서 사용하면 충분히 이용이 가능할 것으로 생각된다. 소맥분과 병용한 경우, 3종의 골분 중에는 조개골분을 첨가하여 제조한 합판 보다는 소골분과 돼지골분을 첨가한 합판의 성능이 우수하였으며, 소골분과 돼지골분 간에는 큰 차이가 없었다. To reuse the waste bone from restaurants or butcher houses, the possibility of using waste bone powder after cooking as a filler for wood adhesives used in manufacturing plywood was investigated. Radiata pine (Pinus radiata D.Don) plywoods were manufactured by using commonly used wood adhesives such as urea-melamine formaldehyde (UMF) resin, urea-formaldehyde (UF) resin, and phenol-formaldehyde (PF) resin and the prepared fillers from cattle bone powder, pig bone powder, and seashell powder. Plywood fabricated by using cattle bone powder, pig bone powder, and seashell powder showed weaker performance in dry and wet glue-joint shear strength and wood failure than those of the plywood with wheat flour. The result showed that it was hard to use only bone powder for the replacement of wheat flour. However, the filler mixed with wheat flour and bone powders showed equivalent dry bonding strength and better water resistance than the wheat flour, indicating that bone powders mixed with wheat flour might be used for the manufacture of plywood. When bone powders were mixed with wheat flour as adhesive fillers the shell powder showed the lowest bonding properties and there was no big difference between the cattle bone powder and the pig bone powder.

용도별 세계목공예품의 수종조사

김사익,조종수,윤승락,노정관,나종범,김동귀,Kim, Sa-Ick,Jo, Jong-Su,Yoon, Seung-Lak,Roh, Jeong-Kwan,Ra, Jong-Bum,Kim, Dong-Kooi 한국가구학회 2006 한국가구학회지 Vol.17 No.1

This study attempted to visually inspect eight hundred wood crafts collected from various countries. These include sculputures, toys, jewl cases, kitchen wares, candle holder and wooden vases, stationery, sport outfits and etc. The most impressive wood is Myrtlewood, a broadleaf evergreen which grows along the coastline of southern Oregon and northern Califonia. Myrtlewood possesses a wide variety of grove patterns. This unique wood varies in color from a deep, rich brown to silver grey, red and every yellow. Myrtlewood is being recognized as being one of the most beautiful hardwoods in the world.

옻칠한지의 제조 및 특성

조현진(Hyun-Jin Jo),이상극(Sang-Kueg Lee),노정관(Jeong-Kwan Roh) 한국펄프·종이공학회 2007 한국펄프·종이공학회 학술발표논문집 Vol.- No.-

폐기 목질 재료로 제조한 학생용 책상 천판의 성능에 미치는 성형조건의 영향

노정관,김재경,김사익,조종수,윤승락,나종범,도정락 한국목재공학회 2002 목재공학 Vol.30 No.4

폐기 목질재료를 사용하여 학생용 책상 천판의 성형시 각 제조조건에 따른 천판의 성능을 검토하였다. 책상 천판의 파티클 구성은 고운 파티클과 거친 파티클을 적절히 혼합한 것이 고운 파티클이나 거친 파티클만으로 제조한 것보다는 전체적으로 성능이 양호하였으며, 특히 표층에는 고운 파티클을 중층에는 거친 파티클을 구성하는 것이 표면 마감성이 가장 우수하였다. 그리고 밀도가 높을수록 박리강도, 휨 강도는 우수하나, 흡수두께 팽창율은 증가하였으며, 수지 도포량이 많을수록 박리강도, 흡수두께 팽창율은 양호하나, 포름알데히드의 방출량은 높았다. 가압온도는 높을수록 대부분의 성능이 향상되었으며, 190℃가 가장 적절하였다. 가압시간은 1단계 2분과 2단계 2분이 비교적 양호하나 2단계의 가압시간을 1분으로 단축하여도 성능에는 큰 문제가 없어 앞으로 생산성의 향상을 기대할 수 있을 것으로 생각된다. This research was performed to investigate the effect of moulding conditions on properties of the table top for student desk manufactured by wood waste materials. The table top manufactured using the mat mixed properly with fine particles and coarse particles generally showed better physical properties than those manufactured using either fine particles or coarse particles did. Especially, highest performance for overlaying was observed when fine particles were used for face layer and coarse particles were used for core layer. The internal bond (IB) strength, the bending strength and thickness swelling increased with the increase of density. Most of physical properties were improved with the increase of hot pressing temperature. The best physical properties were found at 190℃ when the first hot pressing and the second hot pressing times were two minutes. However, the effect of the second hot pressing time of two minutes on the physical properties was not markedly different from that of one minute. This result suggests that the second hot pressing time of one minute is enough to increase the productivity in manufacturing the table top with the least decrease of the physical properties.

붕소화합물을 이용한 대나무의 방부처리

나종범,김사익,조종수,윤승락,노정관,김동귀,최길동 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14

This study was performed to investigate the effect of wax layer of bamboo on leaching of boron compounds. The removal of wax layer increased the loading of boron on bamboo surface. However, it had an effect on increasing the leaching rates of boron compounds during leaching test. The addition of water repellent retarded leaching of boron compounds to some extent from treated samples. Although borate/WRP system did not qualify borate treated wood for ground contact use, it showed a potential to improve performance of borate treated bamboo in above-ground applications not subjected to continuous wetting conditions.

편백 잎(葉) 정유 성분의 항균(抗菌)활성 물질 분석

조종수,김사익,윤승락,노정관,나종범,김동귀,최길동 진주산업대학교 산업과학기술연구소 2007 산업과학기술연구소보 Vol.- No.14

To investigate the antimicrobial effects of essential oil in the leaves of Chamaecyparis obtusa extractives by paper disc method, the extractives were fractionated into four portions. In antimicrobial test, essential oil in the leaves of Chamaecyparis obtusa was found to have strong inhibitory effects against the growth of Bacillus subtilis and Staphylococcus aureus. A part of analyzed inhibition components of essential oil in the leaves of Chamaecyparis obtusa from GC-MS was supposed to be α,β-pinene, α-terpinolene, camphor, β-myrcene, 1-α-terpinolene, 4-thujen-2-α-yl, limonene, Cardinene.