Quantitative analysis of polyvinyl alcohol fiber(containing protein)and mulberry silk blended products based on physical cross section method
Currently,the chemical method is commonly used to determine the fiber content of polyvinyl alcohol fibers(containing protein)and blended products with mulberry silk.However,when 2.5％sodium hydroxide is used to dissolve mulberry silk,it can cause certain damage to polyvinyl alcohol fibers(containing protein),resulting in inaccurate results.In this study,a physical meth-od was employed to observe and analyze the longitudinal and cross-sectional morphological structures of polyvinyl alcohol fibers(containing protein)and mulberry silk using high-power projectors,fiber fineness analyzers,and other equipment,achieving the identification of the two types of fibers.Then,with the help of image analysis software's statistical calculation function,the average cross-sectional area of each fiber was calculated.Combining their respective calculation roots,the percentage content of each fiber group can be calculated.The experiment showed that the physical method yielded stable and more accurate results,while being en-vironmentally friendly.
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