甲基丙烯酰胺接枝桑蚕丝接枝率的数学模型构建与定量分析

为建立蚕丝接枝率的定量分析方法,使用甲基丙烯酰胺(MAA)单体对桑蚕丝进行接枝反应,得到一系列不同接枝率的接枝蚕丝纤维组样.分别应用热重和红外光谱分析技术对系列接枝蚕丝纤维进行表征与分析发现,在表征曲线中出现了新的特征峰,且随接枝率的增加,新特征峰面积逐渐增大.采用Origin9.1数学分析软件中的Gaussian分峰...

Establishment of mathematical model and quantitative analysis for grafting rate of methylacrylamide grafted silk

In order to establish a quantitative analysis method for grafting rate of silk,a series of grafted silk fiber(PMSF)samples with different grafting rates were obtained by the grafting mulberry silk with methylacrylamide(MAA)monomers.The PMSF samples were characterized and analyzed by thermogravimetric analysis and infrared spectroscopy.It was found that a new characteristic peak appeared in the characterization curve after grafting treatment,and the area of the new characteristic peak gradually increased with the increase of grafting rate.The Gaussian method of Origin9.1 mathematical analysis software was used for peak division and fitting of derivative thermogravimetric analysis curve and infrared radiation absorption spectrum curve respectively.A linear function model between grafting rate(weighing method)and the area ratio of corresponding new characteristic peaks was established,and the samples with known grafting rates provided by an industrial partner were verified.The results showed the relative error of grafting rate of silk was less than 5%,indicating that the establishment of the mathematical linear function model combined with thermogravimetric or infrared spectroscopy detection is an effective quantitative analysis method for the determination of the grafting rate of PMSF.