Grafting ratio detecting method of methacrylamide grafted silk

Abstract

The invention relates to a detecting method of a silk product, in particular to a detecting method of the grafting ratio of the silk. The grafting ratio detecting method of the methacrylamide graftedsilk comprises the steps that silk samples no less than 40 and with different methacrylamide grafting ratios are prepared or collected; the grafted silk samples with the grafting ratios being detectedby using a weighing method are subjected to near-infrared spectrum collection, and a near-infrared spectrum chart of the grafted silk is obtained; the grafting ratio detected by using the weighing method is associated with the near-infrared spectrum data obtained through spectra preprocessing by adopting a partial least squares method and through chemometric software, and a near-infrared quantitative analysis model obtaining the silk grafting ratio is built; and to-be-detected grafted silk near-infrared spectrum data obtained through collection is substituted into the silk grafting ratio near-infrared quantitative analysis model, and the grafting ratio of the grafted silk is rapidly obtained through calculation accordingly to the spectrum data information. The method does not make damageto the samples, is low in detecting cost, and can conduct rapid detection in batches.

Description

technical field [0001] The invention relates to a detection method of silk products, in particular to a detection method of silk grafting rate. Background technique [0002] Silk is a natural fiber that integrates lightness, softness and fineness in nature. It has pleasing luster, soft feel and excellent moisture absorption and breathability. It is a high-grade textile raw material; it can be used not only as textile clothing, but also as bedding. Silk quilt is one of its important applications. But relatively speaking, the cost of silk is relatively high. In order to reduce the cost of silk floss, individual silk floss or bedding manufacturers graft and increase the weight of silk. Among them, the more commonly used graft weight-increasing agent is methacrylamide. [0003] After silk is grafted and increased in weight, its chemical composition includes not only natural silk protein, but also different contents of chemical graft polymers, and its physical and chemical prope...

AI Technical Summary

Problems solved by technology

At present, the detection of the grafting rate is mainly realized by the producer through the weighing method, that is, by accurately weighing the silk before and after grafting, but the above-mentioned test method has certain limitations: (1) it can only be achieved by the producer The latter is detected by weighing method, which is only applicable before and after silk grafting processing, and the detection result depends on whether the weight of silk before and after grafting can be accurately measured; (2) For users and consumers of grafted silk, What it obtains is the product that has been grafted, and the grafted product cannot be identified and verified by weighing method, and it is difficult to understand and identify the degree of grafting of silk

The advantage of this method is that it is quantitative, but there are also some shortcomings. For example, it is necessary to gradually heat the silk sample to 700 ° C, which is a destructive test for the sample, and it takes a long time for the instrument to cool from high temperature to room temperature. Expensive, not suitable for mass rapid detection of actual production applications

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