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학위논문 동서

2염기산 무수물에 의한 양모섬유의 아실화:아실화제 구조의 차이에 따른 효과를 중심으로

신은주

부산: 동아대학교 1993. -

37장: 삽도; 27cm. -

학위논문(석사)- 동아대학교 대학원 의류학과 94년2월

영문초록 : Wool keratin yarns were treated in dimethylforamide solutions containing various concentrations of three dibasic acid anhydrides - succinic, itaconic, and phthalic acid anhydrides - at the selected temperatures for selected times. The structural aspects of the dibasic acid anhydrides are different : the succinic, itaconic, and phthalic acid anhydrides have saturated aliphatic ethylene, unsaturated aliphatic vinyl and aromatic phenyl groups, respectively. The reaction mechanism of the acylating agents toward wool keratin and some fishing effects by the acylation were investigated. And the results are as follows. 1. The N-acylation and formation of free carboxyl group were dominant rather than the O-acylation and ester cross-linking on the side chain of polypeptide. The optimum concentration of reagents solution, reaction temperature and time were 0.75~1mol, 65℃, 2~3 hours, respectively; which show that the acylation of wool keratin is easier than that of silk fibroin. 2. The fact that the higher molecular weight, steric hinderance and resonance caused the lower acylating respectivity, was proved by the acyl contents, which were high in order of succinic acid anhydride> itaconic acid anhydride> phthalic acid anhydride. 3. Decreasing amino group and increasing carboxyl group by acylation lowered the hydrophilic property, and then moisture regain, and decreased acid dye uptake and enhanced cationic dye uptake of wool keratin. In the case of phthalic acid anhydride, in spite of lowest acyl content, the minimun of moisture regain was resulted from the bulk benzene ring, occuping much more voids on wool keratin molecules than other reagents. 4. Acid Solubility was increased by the decrease of amino group and hydrogen bonding by acylation. Alkali solubility was also increased by the formation of new amide group on the side chain of keratin, which can be degraded easily by alkali. In the case of phthalic acid anhydride, the relative high solubility was resulted from the much higher molecular weight of dissolved fractions 5. The surface of wool keratin was not damaged by treatment with any acylating agent.

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