麗末鮮初의 對明外交

高錫元 백산학회 1977 白山學報 Vol.- No.23

'스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 9시까지 원문보기가 가능합니다.

아두이노를 활용한 후방 Led 안내판

고석원,김정섭,강준희,조성우 한국산업경영시스템학회 2016 한국산업경영시스템학회 학술대회 Vol.2016 No.추계

Durable Press 가공에 관한 연구(I) -면/비스코스레이온 혼방직물의 Durable Press 가공-

고석원 한국섬유공학회 1978 한국섬유공학회지 Vol.15 No.3

The durable press finish of cotton/viscose rayon blended fabric was made an attempt by pad-dry-cure method to improve the loss of breaking strength, tearing strength and abrasion resistance which was accompanied by durable press finish of cotton fabric. Breaking strength and tearing strength retention were improved by blending viscose rayon, especially breaking strength retention was sufficient to meet its minimum requirement, but abrasion resistance retention was not improved. Therefore new processes must be sought which are able to yield cotton/viscose rayon fabric with improved abrasion resistance and tearing strength retention for producing durable press cotton/viscose rayon blended goods.

Tetrakis Hydroxymethyl Phosphonium Oxalate-Urea 처리 섬유소섬유의 방염성에 관한 연구

고석원,김갑진 한국섬유공학회 1976 한국섬유공학회지 Vol.13 No.4

The tetrakis hydroxymethyl phosphonium oxalate-urea condensation polymer has phosphonyl group after oxidation and the only three of four primary alcohol groups in THP oxalate react with urea undergoing a crosslinked condensation polymerization. When the THP oxalate-urea polymer is pyrolyzed under atmosphere, phosphorus pentoxide, phosphoric acid or phosphates are formed. On account that phosphorus pentoxide or phosphoric acid formed after being pyrolyzed unnder atmosphere phosphorylates, dehydrates or ${\beta}$-eliminates the primary alcohol of C6 of cellulose, cellulose fiber is flame-retarded. The non-oxidated THP oxalate-urea polymer in the P+3 state is thermally very unstabel, and so when the viscose rayon treated with THP oxalate-urea is not oxidated it will not show excellent flame retardancy. The preceding fact was confirmed by DTA curve. This problem phere has conjugated carbon double bond, aldehyde group and furanose ring. Formation of conjugated double bond and decrease of alcohol group seem to result from cellulose being dehydrated or ${\beta}$-eliminated by the pyrolysis product of THP oxalate-urea polymer; P2O5H3PO4 or the other phosphates.

셀룰로오스 나이트라이트의 합성과 그의 응용(II) -아질산 셀룰로오스의 셀룰로오스에의 재생 및 셀룰로오스 유도체와 PAN과의 블랜딩-

고석원,황현숙,김영호,Go, Seok-Won,Hwang, Hyeon-Suk,Kim, Yeong-Ho 한국섬유공학회 1983 한국섬유공학회지 Vol.20 No.3

The effects of the reaction conditions in nitrosation of cellulose and the regeneration conditions of cellulose nitrite to cellulose on the molecular weight of regenerated cellulose, and the blending of cellulose nitrite or cellulose sulfate with PAN were investigated. The results are as follows. The molecular weight of regenerated cellulose is influenced by nitrosation temperature, nitrosation time and the alkalinity of regenerating liquor. X-ray diffractogram shows that the regenerated cellulose has cellulose II structure. Polyacrylonitrile is miscible with cellulose sulfate to a considerable extent, and the film of their blend is so outstanding in anti-static property that it is considered to be able to produce anti-static polyacrylic fiber.

폴리에스테르섬유의 알칼리가공에 관한 연구

고석원,위기찬,김노수,Go, Seok-Won,Wi, Gi-Chan,Kim, No-Su 한국섬유공학회 1977 한국섬유공학회지 Vol.14 No.4

The changes of weight, breasking strength, handle, molecular weight and crystallinity were investigated when polyester fabric was treated with sodium hydroxide solution. The results are as follows. 1) According to the increases of treating sodium hydroxide concentration, time and temperature, weight and breaking strength loss are increased but handle is improved, and these effects are increased by conjunct treatment with carrier. 2) Molecular weight is decreased by alkali teatment. 3) The change of crystallinity by alkali treatment is not app eoiable.

Lenthanide에 의한 PET의 대전 방지 가공(III) -AA/MA 공주합체의 조성-

고석원,김영호 한국섬유공학회 1986 한국섬유공학회지 Vol.23 No.4

The copolymers of acrylic acid(AA) and methacrylic acid(MA) with various compositions were synthesized in benzene using benzoyl peroxide as an initiator. Then the compositions of the copolymers were determined with FT-IR analysis. The reactivity ratios of AA and MA were also determined. The compositions of the copolymers could be determined by FT-IR analysis more easily and precisely than elemental analysis or NMR analysis. The results show that the content of MA unit in the copolymer was greater than the feed ratio of MA in AA/MA copolymerization. The reactivity ratios of AA and MA are 0.668 and 1.530, respectively. Since the product of the two reactivity ratios is approximately unity (rArM 1), this copolymerization can be termed ideal.

Lanthanide에 의한 PET의 대전방지가공(V) -PET에의 AA/MA 그라프팅과 PET-g-AA/MA의 나트륨염화-

고석원,김영호 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.1

To introduce the legands which bind La(III), the carboxylic group containing monomers, such as acrylic acid (AA) and methacrylic acid(MA) were graft copolymerized onto PET film using benzoyl peroxide as an initiator, The two monomers show synergistic effect on the graft yield. The maximum graft yield could be obtained at the monomer ratio (mole ratio) of 1 : 4(AA : MA). But the consideration of the amount of the copolymers not grafted and the ease of the binding with La (III), the ratio of 1 : 1, which gives considerable synergistic effect, is suitable for introducing carboxylic groups onto PET. The conversion of the grafted copolymers to sodium salt with sodium carbonate was studied. The grafted PET is hydrolyzed easily in weak alkaline solution because the grafted hydrophilic copolymers make the penetration of alkaline ion easy by the swelling of grafted PET in water. So to convert the carboxylic group into sodium salt the weak alkaline solution of low concentration should be used. It seems appropriate to use 0.05% sodium carbonate solution.

Zr(IV) Complex와 항미생물제를 이용한 셀룰로오스의 항미생물가공(I) -뱃치 방식에 의한 셀룰로오스에의 Zr(IV) Complex의 도입과 항미생물가공-

고석원,김익수 한국섬유공학회 1989 한국섬유공학회지 Vol.26 No.6

Zr(IV) complex was used to bind antibiotics to cellulose fabric for imparting a high degree of antimicrobial property. Fabrics were successively treated with ammonium zirconyl carbonate solution and chlorampenicol or tetracycline hydrochloride solution by two-bath batch procedure. The reactivity of chlorampenciol with fabric containing zirconium complex was higher than that of tetracycline hydrochloride. Fabrics treated with chlorampenicol or tetracycline hydrochloride solution had a little zone of inhibition against the gram-negative bacterial, Klebsiella pneumoniae, after twenty launderings. These results show that the antimicrobial activity of the fabrics is due to controlled-release mechanism and fast to laundering.

세리신 프랙숀의 본질에 관한 연구

고석원 한국섬유공학회 1974 한국섬유공학회지 Vol.11 No.2

As far as the sericin fractions are concerned, two contradictory opinions have been suggested, that is, the one is that they are different protein and the other identical protein. It is evident that no satisfactory conclusion concerning them in many investigations could be reached. In present study, an attempt was made to throw light on the questions about two opinions and the existence of sericin fraction. From the results of amino acid contents were identical. and so they are considered to be a similar compound. It was also observed that the dissolution rate of sericin according to approaching to the inner layer was decreased. This shows that the layers of sericin surrounding fibroin are gradually formed with increasing molecular weight of sericin according to approaching to the inner layer. On the other hand, the increase in amino nitrogen contents of sericin solution with increased time of autoclaving indicates that the hydrolysis of sericin molecules occurs in the extracting process. On the account of the above two phenomena, the sericin molecules in extratcted sericin solution are diversified with different kinds of molecular weight, and so sericin fractions are separated.