秸秆CMC的流变性能及在姜黄素染发中的应用

Rheological Properties of Straw Carboxymethyl Cellulose and Application in Dyeing with Curcumin

摘要:

以废弃秸秆为原料，采用硝酸-乙醇法提取秸秆纤维素，再通过醚化反应制备了不同取代度的秸秆羧甲基纤维素(CMC)。采用DHR-2流变仪研究了CMC水溶液的流变性能，最后将CMC应用在姜黄素染发中，并与市面上常用的增稠剂比较。结果表明：CMC水溶液为假塑性流体，具有剪切稀化的性质，其体系黏度随平均取代度(DS)、质量分数的增大而增加；CMC水溶液的线性黏弹区为应变小于70%的区域，其范围几乎不受CMC质量分数的影响；CMC水溶液体系黏度随剪切速率的阶跃改变而发生阶跃变化，具有良好的触变性。CMC能使姜黄素易于上染，对毛发损伤小，染后毛发色泽鲜艳饱满，且保持了较好的毛发强度和色牢度。

Abstract:

Ethanol nitrate method was used to extract the cellulose from waste crop stalks, different substituted ratios of carboxymethyl cellulose was prepared by etherification reaction. The rheological properties of CMC aqueous solution was studied by DHR-2 rheometer, Finally the CMC was used in dye hair with curcumin, and compared with common thickeners on the marker. The results show that CMC solution behaved like pseudoplastic fluid and had the nature of shear thinning. Its system viscosity increased with the larger mass fraction and average substitution degree. The mass fraction of CMC solutions had little influence on linear viscoelastic range which strain less than 70 percent of the area. CMC aqueous solution system had good thixotropy and its viscosity step changed with the step changes of shear rate. CMC could make curcumin easy to dye, and do not severely injure hair, the brightly dying performance, high hair strength and color fastness were obtained after dyed.