Development of UV Cutting Materials and the Application to living Environmental Materials (Closes or Domestic Articles)

成色剂广泛应用于纺织品的热致变色体系中，但其耐光性较差。因此，目前正在寻求耐光性的改善。已经合成了各种稳定剂以延长衍生自成色剂的有色物质的寿命。研究了这些化合物对纤维素光褪色的阻滞作用。研究发现，带有两性反离子基团的紫外线吸收剂在提高热致变色纺织品着色剂的耐光牢度方面起着重要作用。近年来，人们对天然色素化学的兴趣也在增加，特别是随着天然色素的使用量的增加。合成了几种苯酯类化合物，并在固态下研究了它们对天然色素红花红、红花素和栀子蓝的光褪色的保护作用。单纯的紫外线吸收剂的应用并不一定能提高天然色素的耐光牢度。然而，带有单线态氧猝灭剂磺酸镍基团的苯酯紫外线吸收剂几乎完全抑制了这些颜色的光褪色速率。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，研究了这些UV吸收材料的抗微生物活性。在这项研究中开发的紫外线切割材料都没有显示出对任何一种细菌的活性。因此，本研究所发现的提高天然色素耐光性的成功技术对环境和人体健康是安全的。

Color formers are extensively used in thermochromic systems for textiles, but their light fastness properties are poor. The improvement of light fastness is therefore being sought at the present time. Various kinds of stabilizers have been synthesized to prolong the life of colored species derived from color formers. The retarding effect of these compounds towards photofading was investigated on cellulose. It was found that the UV absorbers bearing the groups capable of acting as an amphoteric counter-ion play very important role in improving the light fastness of colorants for thermochromic textiles.Interest in the chemistry of natural colors has also increased in recent years, particularly with the increased use of naturally occurring pigments. Various kinds of phenyl ester compounds were synthesized and their protective effects against photofading of natural colors, Safflower Red Carthamin and Gardenia Blue, were examined on solid states. The application of simple UV absorbing compounds was not necessarily useful for improving the light fastness of natural colors. However, Phenyl ester UV absorbers bearing a singlet oxygen quencher, nickel sulfonate group, almost perfectly suppressed the photofading rates of these colors.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 these UV absorbing materials was therefore investigated. None of UV cutting materials developed 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.