키토산 處理 綿布와 나일론 布의 染色性에 觀한 硏究 - 蘇木,코치닐,梔子를 中心으로-

Abstract

It has been known that the natural colorants exhibit good dye-uptake toward cotton, silk, and woolfibers, while they do poorly toward synthetic fibers. This study utilizes the chitosan treatment in order toimprove the dye-uptake for the natural fibers and to enable the synthetic fibers, whose dye-uptake levelsare low, show better affinity toward the natural colorants. Since chitosan has -NH2 group and -OH groupin the structure, the dyeability of the fabric will be improved when the fabric is treated with the chitosan.Cotton fabric as one of the natural fiber fabrics and nylon fabric as one of the synthetic fiber fabrics wereselected for this study.1. In case of cotton fabric, the chiosan treatment takes effect for the Caesalpinia sappan and cochineal,resulting in remarkable DE increase after dyeing. Chitosan helps in developing dark shade byincreasing the uptake of the Caesalpinia sappan and cochineal. It does not, however, participate inthe developing of the specific color as does a metallic mordant.2. In case of dyeing cotton fabric with Gardenia jasminoides, the effect of the treatment with mordantand chitosan is not very pronounced. It is thought that the Gardenia jasminoides uptake isaccomplished in a direct manner in the cellulose chains without the aid of mordant.3. Air-permeability is decreased when the non-mordanted and non-chitosan treated cotton fabric isdyed with Caesalpinia sappan, cochineal, and Gardenia jasminoides.4. In case of nylon fabric, premordanting and chitosan treatments are not highly effective in promotingthe dye-uptake.