Halogen-Free 난연제를 포함하는 파우더 코팅소재 제조 및화재안전성 연구

이순홍,정화영,김대인,노태준 한국안전학회 2011 한국안전학회지 Vol.26 No.4

Halogen free intumescent flame retardants(IFRS), such as the mixture of melamine phosphate(MP) and char forming agents(pentaerythritol(PER), di-pentaerythritol(DiPER), tris(2-hydroxyethyl) isocyanurate(THEIC)), were prepared and characterized. Polypropylene(PP)/IFRS composites were also prepared in the presence of ethylene diamine phosphate(EDAP) as a synergist and used into flame retardant PP powder coatings. Thermoplastic PP powder coatings at 20 wt% flame retardant loading were manufactured by extruded and then mechanical cryogenic crushed to bring them in fine powder form. These intumescent flame retardant powder coatings(IFRPCS) were applied on mild steel surface for the purpose of protection and decorative. It is a process in which a IFRPCS particles coming in contact with the preheated mild steel surface melt and form a thin coating layer. The obtained MP flame retardant was analyzed by utilizing FTIR, solid-state 31P NMR, ICP, EA and PSA. The mechanical properties as tensile strength, melt flow index(MFI) and the thermal property as TGA/DTA and the fire safety characteristics as limiting oxygen index(LOI), UL94 test, SEM were used to investigate the effect of IFRPCS. The experimental results show that the presence of IFRS considerably enhanced the fire retardant performances as evidenced by the increase of LOI values 17.3 vol% and 32.6 vol% for original PP and IFRPCS-3(PP/MP-DiPER/EDAP), respectively, and a reduction in total flaming combustion time(under 15 sec) in UL94 test of IFRPCS. The prepared IFRPCS-3 have good comprehensive properties with fire retardancy 3.2 mm UL94 V-0 level, LOI value 32.6%, tensile strength 247.3 kg/cm2, surface roughness Ra 0.78 µm, showing a better application prospect. Through IFRPCs-2(PP/MP-PER/EDAP) and IFRPCs-3 a better flame retardancy than that of the IFRPCs-1(PP/MP/EDAP) was investigated which was responsible for the formed more dense and compact char layer, improved synergy effect of MP and PER/DiPER.

대학입시 준비를 위한 재수생에 관한 연구 : Ⅱ. 재수생의 일반적인 동태

이순홍,이영순 이화여자대학교 사범대학 교육학과 1967 교육 연구 Vol.- No.30

변성 셀룰로오즈막의 표면물성과 혈액 적합성

이순홍,허훈,이영무,김진일,박영훈 ( Soon Hong Lee,Hoon Huh,Young Moo Lee,Jin Il Kim,Young Hoon Park ) 한국공업화학회 1993 공업화학 Vol.4 No.1

생체의료용 재료로서 응용 가능한 고분자 전해질복합체와 그라프트 공중합체를 수용성 고분자 유도체로부터 제조하였다. 고분자 전해질 복합체들은 카르복시메틸 셀룰로오즈(CMC)와 젤라틴으로부터 제조하였다. 그라프트 공중합체는 메틸셀룰로오즈(MC)에 아크릴산을 그라프트반응시켜 합성하였고, 이 그라프트 공중합체와 젤라틴의 고분자 전해질 복합체도 제조하였다. 그라프트 공중합체와 고분자 전해질 복합체들을 화학가교법과 열처리법으로 제조시 최적조건들을 조사하였다. 예비실험 결과 이들 재료들이 생체의료용 재료로서의 응용 가능성이 있는 것을 알았다. Polyelectrolyte complexes and graft copolymers as biomaterials were synthesized from the water soluble cellulose derivatives. Polyelectrolyte complexes have been prepared from carboxymethyl cellulose (CMC) and gelatin. Graft copolymers(Mc-g-AA) were synthesized by grafting acrylic acid (AA) onto methyl celulose(MC). (Mc-g-AA) and gelatin polyelectrolyte complexes were also prepared. The optimum conditions of each sample were investigated after chemical crosslinking or heat treatment. The preliminary results show that these materials might be interesting for biomedical applications.

개질 천연 고분자 응집제에 관한 연구

이순홍,김대인,배중돈,안광호 안양대학교 산업기술연구소 2000 自然科學硏究 Vol.7 No.-

수용성 고분자 chitosan은 폐수로부터 현탁물질을 처리하기 위한 효과적인 응집제로 유용하게 사용될 수 있다. chitosan은 충분한 양을 확보할 수 있고 무독성이며 2차 오염이 없어 응집제로서 매우 유용하다. 본 연구의 목적은 고기능성 신소재인 분자량 분획 수용성 고분자 chitosan을 분자량별로 각각 100㎎/ℓ로 제조하여 0.1wt%-kaolin 현탁액, 0.1wt%-egg albumin 제조폐수 및 두부공장폐수에 응집제로 사용하여 최적 적용 조건을 검토하였다. 모든 폐수의 응집을 위한 최적 pH는 5, 제조폐수의 응집처리 후 상등액의 투과율은 모두 95% 이상, 두부공장폐수는 약 80%의 투과율을 나타내었다. chitosan blendmer의 경우 chitosan과 CMC(100㎎/ℓ)의 혼합비가 2 : 1 일 때 응집효과가 가장 뛰어났다. Chitosan modified natural polymers can be used as an effective coagulant for the removal of suspended and dissolved solids from wastewater, and doesn't occurred secondary pollution. The present investigation was to evaluate optimum condition for treatment of suspended and dissolved solids from wastewater using plain chitosan and modified chitosan blendmer. Optimum condition for coagulating kaolin suspension, egg albumin suspension and tofu wastewater was pH 5. The highest transmittance of 0.1wt%-kaolin suspension, 0.1wt%-egg albumin suspension and tofu wastewater showed 98.4%(at Mw 800,000Cs), 96.38%(at Mw 200,000Cs) and 79.62%(at Mw 400,000Cs), respectively. In case of chitosan blendmer (CMC : Cs = 1 : 2) the highest transmittance of 0.1wt%-kaolin suspension, 0.1wt%-egg albumin suspension and tofu wastewater showed 95.94%(at Mw 800,000Cs), 95.06%(at Mw 200,000Cs) and 78.38%(at Mw 400,000Cs), respectively.

Silhouette 의 변천에 관한 고찰

이순홍 한국복식학회 1977 服飾 Vol.1 No.-

The new sense of castume is controlled by silhouette. The senes of the times is sensitively reflected in silhouette. For we can perceive the transition of the times through silhouette it is significant to know what course of changes the western costume, which almost became the international costume today, had been going through. I began with the definition and condition of silhouette in this study of silhouette. I took a general survey of silhouette studying various kinds of silhouette and the relation between the material and silhouette. I sought the factors which causec the changes in costume and also studies the process of the changes The process of the costume changes is studied by the order of ancient times, mediaeval times, mordern ages and present days. I selected one representative silhouette of women`s costume of each period. The darpery form of the ancient time`s costume became the tunic form and the tunic form became the tight tunic form today. From this we can perceive that the Gothic period was the limitation of westrn costume. It means that the ancient times was the period of drapery, the midiaeval times was the period of transition from tunic into tight tunic and the modern ages is the period of development of tight tunic. In Egyptian period thin materials were used for costume which was worn in exposed style. In Greek period the costume had the drapery style. The Roman`s magnificent costume resembled the Greek`s. The mediaeval costume was formed in Byzantium where the northern Europe style of costume was mixed with the gay oriental costume. The Romanesque and Gothic period followed the Byzantine period completing the midiaeval costume. Tight tunic is developed in modern ages. Italian fashion of tight tunic was the first fashion of the modern ages. Germanic and spanish fashion came after it. As Baroque period opened the French royal costume became magnificent and added Brition fashish to it. With the commencement of the modern ages the royal fashion came to an end. Modernages became peaple`s period and the costume was simplified. After the First world wav designers and fashion books appeared with tho development of technology. Thus the period of fashion industry came. For the designers in 20th contury competed to create new designs, the fashion was changed year by year. The simplicity and practicality are not ignored in design, and the designers added more atristic sense to dresses.

제철소 분진을 이용한 Tile 접착제 개발에 관한 연구

이순홍,김대인,배중돈,박종철 안양대학교 산업기술연구소 2001 自然科學硏究 Vol.8 No.-

산업이 발달하면서 폐기물의 발생량은 급격히 증가하여 폐기물을 자원화 하기 위한 연구가 활발히 진행되고 있다. 본 연구에서는 제철소에서 발생하여 대부분 해안에 매립 폐기되고 있는 분진을 환원처리하여 타일용 접착제의 첨가제로 사용하였다. 또한 접착력 발현의 가장 중요한 요소인 수지로 수용성 epoxy를 합성하여 사용하였다. 현재 국내 타일 접착제 제조업계에서는 타일 접착제의 내수 및 내알카리성 향상이 가장 큰 현안이다. 따라서 본 연구에서도 내수 및 내알카리성 향상에 주안점을 두고 연구를 수행하였다. 개발 접착제의 건조·수중 침지후 부착강도는 15.3 ~ 17.1kgf/㎠ 이며 알카리용액 침지후 부착강도는 3.4 ~ 4.9kgf/㎠로 나타났다. 저장성의 경우 수용성 epoxy 1액형 조성임에도 현재 2 ~ 3개월의 저장성을 확보하여 환원분철에 대한 타일접착제의 첨가제로서 적용 가능성을 확인하였다. The research for developing the water-borne structural adhesive in the form of homogeneous solution type for the bonding of ceramic tile to concrete wall was carried out. One of the most troublesome present problems in the adhesion of ceramic tile to concrete wall is the lack of water and alkali resistance. The ingredients of the structural adhesive were a epoxy emulsion as a main resin, iron mill powder produced by reduction as a swelling inhibitor, thickning agents, inorganic fillers and other additives. The structural adhesive composition obtained was tested with respect to adhesion, initial tack and application properties and was found to meet the requirements in the field of ceramic tile adhesion.

服飾産業의 發展을 위한 大學敎育方向에 관한 硏究

李順洪 誠信女子大學校 1985 硏究論文集 Vol.22 No.-

As the demand for ready-made clothes is on the increase, garments industry feels it necessary to improve quality. It requires not only new automatic production system and materials but also professional work force in charge of design fashion development. In this vein, the direction of garments education in colleges is very important to the development of the industry. To define the direction, I studied the curriculums of clothing related departments in 28 colleges. I also conducted a survey on 172 designers working in 39 companies. There are total 43 clothing related classes in the schools surveyed. Among them 25 classes are open in most colleges and the rest in less than 5 schools. Major classes, that is, the classes that demand many credits and are common to all departments studied are fashion design theory and illustration, western clothing construction, Korean clothing construction, fabrics study, draping, colouring, dyeing, and merchandizing among others. Female designers aged 23 to 26 account for 71 percent of those surveyed. 93 percent of them are college graduates. 83 percent are satisfied with their job and found to have had interest in this field during their college days. In terms of whether current college education is appopriate for the production of much needed skilled designers, there is an enough variety of classes but an increase in credits is required. It is also needed to equip schools with special sewing machines, VTRs, and computers. On-the-job training of students is necessary to improve the cooperation between schools and industry, as well as to produce more highly skilled professionals. For that purpose, schools are required to set up an institutional agency through which basic studies done in schools are chanelled to industry. In this way, schools could make a contribution to the growth of nation’s economy and export and furthermore to international industrial cooperation.

변성 셀룰로오즈 막내의 물의 상태

이순홍,이영무,김진일,김재진 ( Soon Hong Lee,Young Moo Lee,Jin Il Kim,Jae Jin Kim ) 한국공업화학회 1993 공업화학 Vol.4 No.1

두 종류의 변성 셀룰로오즈 막내의 물의 상태를 시차열분석계를 이용하여 분석하였다. 셀룰로오즈막들은 카르복시메틸 셀룰로오즈(CMC)-젤라틴 고분자전해질 복합체막과 아크릴산 가교 메틸셀룰로오즈(MC)전해질막이다. 동결수(자유수)와 비동결수(결합수) 양을 측정하여서 막을 통한 용질들의 투과도와의 관계를 조사하였다. 막내의 물의 상태는 막의 조성, 모폴로지, 그리고 수화도의 영향을 받는 것을 알았다. 수화된 막들을 통한 확산 투과도의 차이를 자유수와 결합수의 차이로 설명하였다. The state of water in various modified cellulose membranes, such as [carboxymethyl cellulose(CMC)-gelatin] polyelectrolyte complex, methylcellulose(MC) grafted with acrylic acid(AA), [(MC-g-AA)-gelatin] polyelectrolyte complex, were determined by differential scanning calorimetric technique. The amounts of freezing (free) and nonfreezing(bound) water were estimated to determine the permeabilty coefficient of solutes through membranes. The states of water in membranes were influenced by the states of the composition, morphology, and their water content. The difference in diffusive permeability through the water-swollen membranes can be explained by the difference in the free and bound water content.

Paint sludge내 활성을 고려한 건조방법에 관한 연구

이순홍,백우진,윤강재,이재현,김화진 안양대학교 산업기술연구소 2004 自然科學硏究 Vol.11 No.1

각종 도장산업에서 발생하는 paint sludge는 대부분 소각후 매립 또는 건조과정을 거쳐 단순 무기재로서 재활용되어지고 있다. paint sludge의 양은 매년 증가하는 추세이고 이에따라 국내외에서는 paint sludge를 보다 가치가 높은 유기재로서 재활용하는 방안이 연구되어지고 있다. 따라서 재활용공정 중 필수공정인 건조방법을 이전과는 다른 방법등을 도입하여 paint sludge내 활성기를 보존하고 함유수분을 효율적으로 제거하기 위하여 효과적인 연구방법을 찾는데 연구의 목적이 있다. 본 연구에서는 문헌연구를 통하여 건조온도를 낮추는 효과를 기대할 수 있는 물리적 방법인 감압건조법과 paint sludge에 첨가제를 첨가하여 건조효율을 높일 수 있는 화학적 첨가제를 첨가한 방법을 건조방법에 적용하여 실험하였다. 또한 화학적 첨가제 첨가 후 전처리로서 수분산시킨후 감압여과하는 공정을 추가하여 실험하였다. 감압건조법을 이용하여 활성기 잔존을 위한 최적의 조건을 온도별, 압력별 건조효율 비교실험을 통하여 80℃, 60mmHg로 결정한 후 각 첨가제별 건조효율을 비교하였다. 4가지 첨가제 중 bentonite가 24시간 건조 후 함수율 2.38%로 가장 높은 효율을 나타냈었다. 또한 전처리를 행한 경우 magnesium chloride, sodium hydrogen carbonate 및 bentonite는 paint sludge 입자내 수분을 흡습하여 여과시 시간을 길게 진행하여도 기존의 함수율보다 낮은 함수율을 얻었다. Calcium oxide경우 감압여과 30분 처리 후 감압건조를 실시한 결과 첨가량이 증가할수록 높은 효율을 나타내었으며 첨가량 5%일때를 제외하고 10%, 20%, 30%일때 모두 4시간안에 5%이하의 함수율을 얻을 수 있어 감압건조만으로 이루어진 공정에 비해 절반정도의 시간을 단축할 수 있었다. 첨가제량에 따른 경제성과 재활용시 영향을 미칠 가능성을 고려하여 첨가제량은 10%정도가 적절한 것으로 판단된다. Paint sludge내 활성을 고려한 건조방법에 관한 연구 활성기의 손실여부는 FT-IR spectrum을 사용하여 -COOH, -OH 및 -NH_(2)기가 건조후 paint sludge powder내에 존재하고 있음을 확인하였다. 활성기의 존재로 인하여 paint sludge의 물성을 유지한 고기능성 재료로의 재활용이 가능할 것으로 예상되며 실제 공정에 적용할 경우 좀 더 많은 연구가 필요할 것이라 사료된다. Most of the paint sludge that is derived in the paint industry is buried after incineration. Only a few amount of them recycled as an inert inorganic filler in the fine powder form by the process of being dried or after incineration. The purpose of this study is to find out the effective method that can dehydrate and preserve active radical in efficiency. We made the experiment on the method of decompression drying which can lower the temperature of drying as a physical method, the method of a chemical addition which can rise the efficiency of drying. In the study, bentonite was the most excellent in the dehydrating efficiency to show the final water content of 4.5% in 10 hours, and sodium hydrogen carbonate, magnesium chloride, calcium oxide, raw paint sludge followed bentonite in order to of efficiency, when we decided 60mmHg, 80℃ as the best suited condition for the survival of active radical. We measured the loss of active radical by using FT-IR spectrum and confirmed the existence of -COOH, -OH and NH_(2) radicals in paint sludge.

線이 服飾에 미치는 影響에 관한 硏究

李順洪 誠信女子大學校 1975 硏究論文集 Vol.8 No.-