薯莨色素的提取及对棉和真丝织物的染色性能研究
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摘要
本文对从薯莨中提取薯莨色素的方法进行了优选,得到了提取的最佳工艺:70%丙酮溶液为提取剂,溶质和溶剂比1:5,60℃水浴中浸提3h。并且对提取的薯莨色素的pH、光照、温度和金属离子对其稳定性的影响进行了研究,结果表明,薯莨色素耐光性差,适宜避光保存;在70℃以下、酸碱为中性的条件下性质稳定;Fe2+和Zn2+对其稳定性的影响不大,但是Ti4+对其影响很大。
     用提取的薯莨色素溶液对棉及真丝织物进行染色实验,通过测定K/S值及颜色特征值L*、a*、b*,确定了染色的最佳工艺,并且测定染色后织物的色牢度。结果表明,以铁离子为媒染剂,采用轧染法染色后的棉和真丝织物都能获得较好的染色深度,而以铝离子为媒染剂染色试样的颜色较浅,薯莨染色试样的水洗和摩擦牢度基本都符合要求,但日晒牢度差。薯莨染色对织物的抗紫外性能,服用性能和物理机械性能产生不同程度的影响,扫描电镜和X-射线衍射等测试表明,染色没有使棉和真丝的内部结构发生变化。
Extracting pigment from Diosorea Cirrhosa had been studied in the thesis,the best conditions of extracting were as follows: using 70%CH3COCH3, the ratio of solvent and solute 1:5,temperature 60℃and lasting for 3 hours. And the stability of pigment extracted from Diosorea Cirrhosa had also been researched including photostability, thermostability, pH, the existence of a variety of metal ion, the results show that: the pigment must be preserved without lights as the matter of poor photostability, it is stable under the condition of 70℃and neutral, it can maintain stability with the existence of Fe2+ and Zn2+, but it is impacted greatly with Ti4+.
     The pigment which was extracted from Diosorea Cirrhosa was used to dye silk and cotton fabric, the best dyeing process was obtained according to K/S, L*,a*,b*,and the dyeing fastness was tested. The better dyeing performance was obtained with pad dyeing, using Fe2+ as the mordant, but it was not with Al3+.The washing and rubbing fastness of dyed fabrics meet the basic requirement. The treatment brought varying degrees of impact to the uv-resistant, comfort and physical properties of the fabric, the dyed fabrics were tested by scanning electron microscope and energy spectrum x-diffraction, it was found that the dyeing processing scarcely influenced the inner structure of silk and cotton.
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