氯化钙/乙醇法定量分析桑蚕丝/羊毛混纺织物  

Quantitative analysis on silk/wool blended fabric with calcium chloride/ethanol solution

作　　者：俞昌朝 周兆懿[1] YU Changchao;ZHOU Zhaoyi(Shanghai Institute of Quality Inspection and Technical Research,Shanghai 200040,China)

机构地区：[1]上海市质量监督检验技术研究院,上海200040

出　　处：《丝绸》2022年第1期25-30,共6页Journal of Silk

摘　　要：本文采用氯化钙/乙醇水溶液去除桑蚕丝/羊毛混纺织物中的桑蚕丝纤维,以对桑蚕丝/羊毛混纺织物的纤维含量进行定量分析,研究了氯化钙/乙醇水溶液中氯化钙摩尔浓度、水浴温度、乙醇体积分数、水浴处理时间等条件对桑蚕丝、羊毛溶解性能的影响。结果表明,4 mol/L的氯化钙和乙醇体积分数为45%的水溶液在80℃水浴中处理30 min,可作为桑蚕丝/羊毛混纺织物纤维含量定量分析的最佳溶解条件,并且对羊毛纤维的损伤较小。The blended fabric of mulberry silk and wool has the characteristics of smooth hand feeling,excellent elasticity,softness and comfort.On account of the expensive price of mulberry silk and wool blended fabric,the ratio between both has always been regarded as an important performance index by merchants and consumers.In recent years,great discrepancy between the fiber content of silk/wool blended fabric and the label and even disqualification have been detected in quality supervision and random checking,causing considerable troubles to consumers.Therefore,the accuracy of fiber content detection results in silk/wool blended fabric is very important.At present,the quantitative analysis methods used in the laboratory has some defects in actual operations,leading to the deviation of the test results.Both mulberry silk and wool are protein fibers,which can hardly be distinguished by common acid and alkali solvents due to their similar acid and alkali resistance,causing great difficulties in quantitative analysis of silk/wool blended fabric.Studies have found that mulberry silk and wool are different in chemical composition and microstructure.Literature reports show that mulberry silk will swell indefinitely in a chloride concentrated solution of calcium,and the calcium ions in the salt solution will destroy hydrogen bond and van der Waals force that can stabilizeβ-folding structure in the silk fibroin,so that the mulberry silk further swell until it is completely dissolved.On the other hand,the performance of wool fiber is very stable in the general inorganic salt solutions.Therefore,in this study,the calcium chloride/ethanol solution was used to replace the strong acid reagent commonly used in the laboratory,the mulberry silk and the wool was separated under appropriate conditions,thereby improving the methods of detecting fiber content in silk/wool blended fabric products.The study discussed the dissolution mechanism of silk/wool blended fabric with calcium chloride/ethanol solution,investigated the influence of the

关 键 词：桑蚕丝 羊毛 混纺织物 氯化钙 定量分析 

分 类 号：TS107.6[轻工技术与工程—纺织工程]