折光率法在蚕丝精练中的应用  

Application of the refractive index method in silk scouring

作　　者：殷英 李楚楚[1] 沈一峰[1,2] 周青[1] 姜建堂[1] 雷斌 梁辉 张金珍 YIN Ying;LI Chuchu;SHEN Yifeng;ZHOU Qing;JIANG Jiantang;LEI Bin;LIANG Hui;ZHANG Jinzhen(College of Textile Science and Engineering(International Institute of Silk),Zhejiang Sci-Tech University,Hangzhou 310018,China;Shaoxing Keqiao Research Institute of Zhejiang Sci-Tech University,Shaoxing 312000,China;High Fashion(Zhejiang)Co.,Ltd.,Shaoxing 312500,China)

机构地区：[1]浙江理工大学纺织科学与工程学院(国际丝绸学院),杭州310018 [2]浙江理工大学绍兴柯桥研究院,浙江绍兴312000 [3]达利丝绸(浙江)有限公司,浙江绍兴312500

出　　处：《丝绸》2023年第11期50-55,共6页Journal of Silk

基　　金：浙江省重点研发计划项目(2021C03149)。

摘　　要：为了快速估算蚕丝织物精练时的脱胶率和判断连桶次数,采用数显折光仪测定蚕丝精练液及其主要成分的折光率,建立了丝胶、纯碱、精练剂和折光率的两种线性回归模型,探究了温度对丝胶溶液折光率的影响,精练液折光率和蚕丝脱胶率的关系。实验结果表明:丝胶一元线性回归模型Y=0.1166 x-0.0027,折光率偏差小,计算简单,能更加便捷地反映丝胶质量浓度和蚕丝精练液折光率的变化规律;溶液温度升高,折光率会变小,高温下线性拟合较差,最佳测试温度是(25±2)℃;当连桶精练液折光率大于5.0后,脱胶率明显下降,需更换新桶。Silk is mainly composed of silk fibroin and sericin,and to facilitate subsequent dyeing and processing,sericin needs to be removed through a refining process.The commonly used refining method is the continuous barrel alkali refining method,which means that after completing a refining in a barrel,further refining is needed by adding alkali and refining agent.Initial refining is an important process for refining and degumming,with a degumming rate generally between 20%and 25%.To save materials and improve efficiency,factories usually use the flipping barrel process for processing.That is,the new barrel is first used as a re-refining barrel,and then as a preliminary refining barrel and a soaking barrel.As the sericin falls off,the concentration of sericin in the refining barrel will increase.After 4-6 consecutive rounds of initial refining in the barrel,due to the high concentration of sericin,the degumming rate will significantly decrease,which cannot meet the quality requirements.Therefore,the waste liquid needs to be discharged and the barrel needs to be replaced.At present,some methods for measuring the degumming rate of silk take too long,and some have low accuracy,resulting in unsatisfactory results.The refractive index,as one of the important physical constant of substances,is often used to determine the concentration of substances.In this paper,we intend to use this method to quickly determine the degumming rate and the number of consecutive barrels.Using a digital refractometer to measure the refractive index of silk scouring solution and its main components,we established two linear regression models for sericin,soda ash,scouring agent,and refractive index.The linear regression model for sericin was Y=0.1166 x-0.0027,and the linear regression model for sericin mixture was Y=0.117 x 1+0.123 x 2+0.029 x 3-0.13.In actual processing,the proportion of various components in silk scouring solution cannot be accurately calculated.To choose a suitable linear model,we made two assumptions.Assumption 1:soda ash and s

关 键 词：蚕丝 精练 折光率 脱胶率 线性回归 丝胶 

分 类 号：TS192.5[轻工技术与工程—纺织化学与染整工程]