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특허(特許)와 논문(論文)으로 본 동식물폐유지(動植物廢油脂) 모노머화 재활용(再活用) 기술(技術) 동향(動向)
김영운,윤병태,조봉규,조영주,Kim, Young-Wun,Yoon, Byung-Tae,Cho, Bong-Gyoo,Cho, Young-Ju 한국자원리싸이클링학회 2013 資源 리싸이클링 Vol.22 No.1
지구환경 문제 및 건강과 관련하여 친환경 제품 개발에 대한 관심이 날로 증대되고 있으며 사용중 산화 등으로 인하여 발생하는 유해물질이 포함된 동/식물성 유지류 등을 환경친화적 제품으로 재활용하는 것은 매우 중요한 기술이다. 본 연구에서는 동식물폐유지 모노머화 재활용 기술에 대한 특허와 논문을 분석하였다. 분석범위는 1976년 ~ 2012년까지의 미국, 유럽연합, 일본, 한국의 등록/공개된 특허와 SCI 논문으로 제한하였다. 특허와 논문은 키워드를 사용하여 수집하였고, 기술의 정의에 의해 필터링 하였다. 특허와 논문의 동향은 연도, 국가, 기업, 기술에 따라 분석하였다. 이에 전처리 정제, 중합용 모노머화, 중합체 제조 기술 모두 미국이 앞서 있는 것으로 나타났다. There is increasing interest to the development of environmental friendly products related global environment and health issue and it is very important technology for recycling contained hazardous substance that occur due to oxidation during used oils and fats of vegetable and animal to eco-friendly products. In this study, papers and patents for recycling technologies of used fat and vegetable oil as monomers were analyzed. The range of search was limited in the open patents of USA (US), European Union (EP), Japan (JP), Korea (KR) and SCI journals from 1976 to 2012. Patents and journals were collected using key-words searching and filtered by filtering criteria. The trends of the patents and journals were analyzed by the years, countries, companies, and technologies. Such pretreatment purification, polymerization for monomer, and polymer manufacturing technology were ahead of the United States.
3 - ( Triethoxysilyl ) propyl Perfluoroalkyl Urethane 의 합성 및 발수성능
김영운(Young Wun Kim),정근우(Keun Wo Chung),이은아(Eun A Lee),서용걸(Yong Geol Seo) 한국공업화학회 2002 공업화학 Vol.13 No.5
과불화기를 함유한 여러 가지 알콜, F(CF_2)_m(CH_2)_(n+2)-OH을 합성하였다. 합성 알콜을 트리에톡시실릴아이소시아네이트와 축합반응하여 트리에톡시실릴프로필 우레탄을 합성하였으며 ^1H-NMR과 FT-IR 스펙트라로 구조를 확인하였다. 합성 우레탄을 IPA 용매에 녹이고 산 촉매하에서 가수분해 반응을 행한 후 유리에 스핀 코팅하였다. 코팅된 유리를 150 ℃에서 열처리하고 물에 대한 접촉각을 측정하므로써 발수성능을 평가하였다. 발수성능 측정 결과, 물에 대한 접촉각은 100∼120˚ 범위를 나타내었으며 우레탄의 불소기와 메틸렌의 수 및 가수분해 시간에 크게 의존하였다. 또한, 6개월 동안 장기 보관된 코팅 유리의 접촉각은 큰 감소없이 처음의 접촉각을 그대로 나타내어 발수성능은 아주 우수하였다. A series of alcohols with perfluorinated segments F(CF_2)_m(CH_2)_(n+2)-OH (m={8,10} and n={2, 4, 8}) were synthesized. The alcohols were converted to triethoxysilylpropyl perfluoroalkyl urethanes by condensation reaction, which were then characterized by ^1H-NMR and FT-IR spectra. In the presence of an acid catalyst, the triethoxysilylpropyl urethanes underwent hydrolysis and condensation to yield heavily cross-linked matrixes, and onto glass the spin-coated films were prepared. Curing the spin-coated films at 150 ℃ in air produced thermally stable films. The water contact angles of the films varied from 100˚ to 120˚, depending on the numbers of fluorocarbon and methylene units and the hydrolysis times. It was found that the water contact angles of 6 months old coated films were similar to that of newly coated films. In conclusion, the water-repellent properties of the coated films for a long term storage were excellent.
숙신산 알킬 하프-에스테르 유도체의 합성 및 해수에 대한 방청성능
김영운 ( Young Wun Kim ),백승엽 ( Seung Yeob Baek ),정근우 ( Keun Wo Chung ),유승현 ( Seung Hyun Yoo ) 한국공업화학회 2011 공업화학 Vol.22 No.4
숙신산 에스테르 유도체는 방청성능 및 윤활성능이 우수하여 금속가공유 및 유압작동유 등의 첨가제로 많이 사용되 고 있다. 본 연구에서는 광유계 윤활기유의 방청제로 사용하기 위하여 알킬 무수 숙신산과 여러 가지 지방 알콜과의 개환반응을 행하여 카르복실 그룹과 에스테르 그룹을 동시에 함유하는 숙신산 알킬 하프-에스테르 유도체를 97% 이 상의 수율로 합성하였으며 1 중량% 농도범위에서 광유계 오일에 잘 용해되었다. 합성 유도체는 1 H-NMR 및 FT-IR 스펙 트럼으로 구조를 확인하였으며, GC 분석을 통하여 화합물의 순도를 확인하였다. 또한, 합성 유도체의 해수에 대한 방청성 능을 ASTM D665 표준방법과 무게 중량법으로 평가하여 카르복실산 그룹을 함유하지 않는 숙신산 알킬 에스테르 유도체와 비교하였다. 방청성능 평가 결과, 합성 유도체의 농도가 증가하고 분자 내에 포함된 알킬기의 사슬이 짧을수 록 상대적으로 방청성능이 우수하였으며 비교물질인 숙신산 알킬 에스테르 유도체는 방청성능을 전혀 나타내지 않았 다. 무게 중량법으로 평가한 80 중량ppm 농도를 첨가한 오일의 방청효율 % (IE%)는 알킬기의 사슬이 짧을수록 높은 값을 나타내어 최고 95% 이상이었다. 또한, 발청속도(Corrosion rate, CR)는 알킬기의 사슬이 짧을수록 낮은 값을 나타 내어 80 중량ppm에서 최고 0.3 mm/year 이하를 나타내었다. 즉, 숙신산 알킬 하프-에스테르 유도체의 해수에 대한 방 청성능은 분자 내에 함유되어 있는 카르복실산 그룹으로 인하여 나타나는 것으로 판단되었다. Succinic acid ester derivatives have been used as additives for the base oil of metal working fluids and pressure working oils. In this paper, a series of succinic acid alkyl half-esters were synthesized with over 97% yields by ring-opening reaction of succinic anhydride and fatty alcohol and were soluble in 100 N base oil within 1 wt% concentration. The structures and purities of ester derivatives were confirmed by 1 H-NMR and FT-IR spectrum and GC analysis. Anti-corrosion properties of the esters in sea water were evaluated through ASTM D665 method and weight loss method and compared to that of succinic alkyl esters without carboxylic acid group in the molecule. As the results, anti-corrosion properties of succinic acid alkyl half-esters with carboxylic acid group were better than those of succinic acid alkyl esters without carboxylic acid group. And, Anti-corrosion properties of the esters with a shorter alkyl chain of high concentration showed better performance than those with longer alkyl chain of low concentration. Inhibition efficiency % (IE%) of the esters was over 95% in the concentration of 80 ppm and corrosion rate (CR) was below 0.3 mm/year at the same concentration. Thus, the corrosion properties of succinic acid alkyl half-esters result from the carboxylic acid groups in molecules.
Anti-wear performance and life evaluation of wheel bearing type greases
Jung-Young Kim(김중영),Keun-Wo Chung(정근우),Young-Wun Kim(김영운),Won-Oh Jo(조원오) 한국트라이볼로지학회 2004 한국트라이볼로지학회 학술대회 Vol.39 No.-
Li-complex and urea type greases (each 10 species) which were furnished by Chang-Am LS. analyzed anti-wear performance into fretting wear tester & four-ball wear tester. From the results of fretting wear test. the wear volume of Li-complex greases are 4.6~8.9㎎ and 8.3-14.4㎎ with the test of urea greases. The anti-wear performance for 4-ball wear test of greases produced results around 0.5㎜ at the value of WSD. The grease life performance were evaluated by SKF-ROF Grease Tester and wheel bearing life tester. From the results of SKF-ROF tester. the life performance evaluated by whole working time produced results 50~300hr with the Li-complex greases and 100-1000hr with the urea greases. That is to say. in spite of severe condition at the higher of 10℃ reaction temp. the life performance with Urea type greases are much superior to Li-complex type greases. Prior to wheel bearing life tester. the grease selected performance evaluation(=anti-wear test) are tested by wheel bearing tester. In this results. we can confirm results those are similar with SKF-ROF tester. In this study. we can draw two major conclusions. one is that Li-complex greases are superior to urea greases with anti-wear properties and the other is that urea greases are much superior to Li-complex greases with life performance
양영도(Young-Do Yang),김영운(Young-Wun Kim),정근우(Keun-Wo Chung),김성보(Seong-Bo Kim),임대재(Dae-Jae Yim),김영직(Young-Gik Kim) 한국트라이볼로지학회 2007 한국트라이볼로지학회 학술대회 Vol.2007 No.6
New pour point depressants were prepared by making use of the random copolymerization of acrylate monomer. The pour point and cloud point of the synthetic polymers in diesel mixtures containing 5%(BD5) and 20%(BD20) biodiesel were investigated. The characteristics of the synthetic polymers which were random structure of P(St/SMA). P(SMA/St), P(SMA/OMA/St), P(LM/AMA/St), P(LMA/SMA/St) were analyzed by ¹H-NMR and GPC. When the synthetic polymers were added to BD5 and BD20 at the concentration of 5000ppm. The pour point of the terpolymers were -5℃~-10℃ lower than that of the copolymers. In the case of BD5 whose pour point is -12.5℃, the pour point of the existing additives and the P(LMA/SMA/St) polymer additive which showed the lowest pour point among the synthetic polymers were -37.5℃ and -35℃ respectively at the concentration of 5000ppm. The result showed the pour point of the P(LMA/SMA/St) polymer was higher than the existing additives. On the other hand. in the case of BD20 whose pour point is -10℃, the pour points of the existing additives and the P(LMA/OMA/St) polymer was -32.5℃ and -35℃ respectively at the concentration of 5000ppm. It showed that the P(LMA/OMA/St) polymer was lower than the existing additives. In the results of cloud point, the cloud point of the synthetic polymers revealed -3℃ lower than before addition of the polymers and -2℃ lower than the cloud point of existing additives.