天然染料对纤维的亲和力低,媒染法染色是比较常用的方法,很多环境污染就是由重金属媒染造成的。文章通过壳聚糖对羊毛表面改性,以提高栀子蓝色素对羊毛纤维的直接性达到直接上染的目的,计算了栀子蓝在羊毛纤维上的热力学参数。结果表明,...天然染料对纤维的亲和力低,媒染法染色是比较常用的方法,很多环境污染就是由重金属媒染造成的。文章通过壳聚糖对羊毛表面改性,以提高栀子蓝色素对羊毛纤维的直接性达到直接上染的目的,计算了栀子蓝在羊毛纤维上的热力学参数。结果表明,在10%(owf)用量范围内,栀子蓝在羊毛上的吸附最符合Freundlich吸附模型,并用拟合系数和正规偏差验证了吸附模型,该过程是吸热过程,染色热为分别为-19.516 k J/mol(未处理),-16.836 k J/mol(壳聚糖),染色熵ΔS0分别为69.11 J/mol·K(未处理),62.29 J/mol·K。染色亲和力和饱和吸附量随温度的升高而增加。为天然染料在羊毛纤维上的生态染色提供了理论依据。展开更多
Photobleaching of aged traditional Japanese paper that has been thermally yellowed during storage for 200 years was examined from the standpoint of accumulated light radiation dosage in a museum environment. The light...Photobleaching of aged traditional Japanese paper that has been thermally yellowed during storage for 200 years was examined from the standpoint of accumulated light radiation dosage in a museum environment. The light intensity was evaluated using a blue wool reference of the Japan Industrial Standards (JIS) as a dosimeter. The wavelength sensitivity of the photobleaching was compiled under monochromatic light radiation. Color changes in the specimens were measured in tristimuli values in color. by using a color analyzer. The aged pieces of paper were monitored continuously as they were photobleached under three different lighting conditions in a museum environment for 8000 h. The combination of the yellowness index changes of the aged pieces of paper and the color changes of a blue wool reference was interpreted as follows. Photobleaching was governed by accumulated light intensities and was independant upon daily lighting conditions. The wavelength sensitivity of the photobleaching of aged paper showed that the maximum effect occurred at 420 nm in the visible light range. The blue wool reference was confirmed to perform well as a dosimeter.展开更多
文摘天然染料对纤维的亲和力低,媒染法染色是比较常用的方法,很多环境污染就是由重金属媒染造成的。文章通过壳聚糖对羊毛表面改性,以提高栀子蓝色素对羊毛纤维的直接性达到直接上染的目的,计算了栀子蓝在羊毛纤维上的热力学参数。结果表明,在10%(owf)用量范围内,栀子蓝在羊毛上的吸附最符合Freundlich吸附模型,并用拟合系数和正规偏差验证了吸附模型,该过程是吸热过程,染色热为分别为-19.516 k J/mol(未处理),-16.836 k J/mol(壳聚糖),染色熵ΔS0分别为69.11 J/mol·K(未处理),62.29 J/mol·K。染色亲和力和饱和吸附量随温度的升高而增加。为天然染料在羊毛纤维上的生态染色提供了理论依据。
文摘Photobleaching of aged traditional Japanese paper that has been thermally yellowed during storage for 200 years was examined from the standpoint of accumulated light radiation dosage in a museum environment. The light intensity was evaluated using a blue wool reference of the Japan Industrial Standards (JIS) as a dosimeter. The wavelength sensitivity of the photobleaching was compiled under monochromatic light radiation. Color changes in the specimens were measured in tristimuli values in color. by using a color analyzer. The aged pieces of paper were monitored continuously as they were photobleached under three different lighting conditions in a museum environment for 8000 h. The combination of the yellowness index changes of the aged pieces of paper and the color changes of a blue wool reference was interpreted as follows. Photobleaching was governed by accumulated light intensities and was independant upon daily lighting conditions. The wavelength sensitivity of the photobleaching of aged paper showed that the maximum effect occurred at 420 nm in the visible light range. The blue wool reference was confirmed to perform well as a dosimeter.
