Valuable Utilization of Natural Products and the Modification to Functional Clothes

近年来，对天然色素化学的兴趣有所增加，特别是随着天然色素的使用增加。虽然单线态氧猝灭剂对合成色素的贡献以前已经被几个工作者研究过，但是很少有关于使用单线态氧猝灭剂作为改善天然色素的耐光性的手段的研究。本文研究了在醋酸纤维素膜中，各种添加剂对红花素光褪色的影响。单重态氧敏化剂的加入加快了褪色速率，而DABCO的加入则延缓了褪色速率，受阻酚的加入也抑制了褪色速率。这些结果表明自由基和单线态氧参与了红花素的光化学氧化。在羟基芳基磺酸镍的存在下，显着抑制褪色的速度。保护环境和人类健康现在被认为比企业的盈利能力和效率更重要。因此研究了镍盐的抗微生物活性。本研究中使用的芳基磺酸镍均未显示出抗细菌的活性。此外，本文还研究了柠檬酸DP整理对棉织物微粒沾污的影响，以及紫甘薯色素和无患子色素的开发利用。

Interest in the chemistry of natural colors has increased in recent years, particularly with the increased use of naturally occurring pigments. While the contribution of singlet oxygen quenchers to synthetic colors has been investigated previously by several workers, there have been few studies pertaining to the use of singlet oxygen quenchers as a means of improving the light fastness of natural colors. In this study, the influence of various additives on the photo-fading of carthamin has been examined in cellulose acetate film. The rate of fading was accelerated by adding a singlet oxygen sensitizer, and retarded in the presence of DABCO.Furthermore, the rate was also suppressed by addition of hindered phenol. These results suggest the involvement of free radicals and singlet oxygen in the photochemical oxidation of carthamin. The rate of fading of the color was remarkably suppressed in the presence of nickel hydroxyarylsulfonates. Protection of the environment and human health is now perceived as more important than the profitability and efficiency of a business. The antimicrobial activity of the nickel salts was therefore investigated. None of the nickel arylsulfonates used in this study showed activity against either bacteria. Accordingly, the successful technique for improving light fastness of natural colors discovered here was safe for the environment and human health.In addition, the effect of citric acid DP finishing on soiling with particulate soil of cotton fabric, and valuable utilization of Purple sweet potato color and Sapindus mukurossi Gaertn also were studied in this work.