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wangru1987(½ð±Ò+50):ллÄã ÐÁ¿àÁË ²»ÊÇÌØÊâÇé¿öÎÒÒ²²»»áÔÚÕâÈç´ËÇóÖúµÄ лл 2010-11-15 20:45:25
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wangru1987(½ð±Ò+50):ллÄã ÐÁ¿àÁË ²»ÊÇÌØÊâÇé¿öÎÒÒ²²»»áÔÚÕâÈç´ËÇóÖúµÄ лл 2010-11-15 20:45:25
¡¾Synthetic dyes in order to avoid environmental pollution and harm to human body, renewed emphasis on non-toxic, renewable, unique colors, the human body without stimulation, with the natural environment and ecological health functions and good compatibility with natural dyes. With the hair of fashion in recent years, the preparation of natural dyes and hair dyeing process of great significance. This paper selects the field of research in the more wool dyeing, staining the red line better natural plant dye hematoxylin, catechu as the research object, both the extraction of plant dyes and dyeing properties of hair. First, the performance of plants under the two dyes, select a different solvent and extraction method, with UV - visible spectrophotometer measured absorbance value of optimal extraction process based on selection. Four factors and three levels designed experiment, of dyeing temperature, time, pH, amount of mordant dyeing process parameters such as bleached hair dyeing effect law, computer color measurement system to measure the dye bleaching extraction the basis of hair color features to optimize the dyeing process. Research on natural dyes dye your hair the color of hematoxylin stability and bleached hair and the thermodynamic interaction between hematoxylin and explore its dyeing mechanism. The results showed that the dye process, HE was the hair, while the adsorption, the desorption hematoxylin are carried out and also compete with the adsorption process. And after bleaching the hair on hematoxylin adsorption process is endothermic, the adsorption process is spontaneous. Gaussian03 quantum chemistry package used hair dyes hematoxylin and natural interactions are studied theoretically. The results show that, if the acidic dye hematoxylin, the hematoxylin major molecular fragments and hair play a role in amino; if the alkaline dye solution, the main molecular fragment and hair play a role in the carboxyl. In contrast, dyed under alkaline conditions, it will make the stain more solid. Among them, particularly the hair in an alkaline environment interaction with hematoxylin, the structure is more stable, the hair will be in the form of quaternary ammonium salts and amino hematoxylin interactions. ¡¿ |
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