Method for testing amino silicon oil content in chitosan fiber

Abstract

The invention provides a method for testing the content of amino-silicone oil in chitosan fiber, which relates to a chitosan fiber production process. The method comprises the following steps: the chitosan fiber is subjected to ashing treatment; silicon in the amino-silicone oil is oxidized so as to obtain silicon dioxide; the silicon dioxide is subjected to nitrolysis through nitric acid, so as to prepare silicic acid; the silicic acid reacts with ammonium molybdate to form molybdenum yellow; the molybdenum yellow is reduced into molybdenum blue through ferrous sulphate; and finally the absorbance of a solution after color development at the wavelength of 595 nanometers is determined by use of a spectrophotometer, so as to figure out the silicon oil content of the fiber. As the method for testing the content of amino-silicone oil in chitosan fiber adopts the spectrophotometer to measure the oil quantity of the amino-silicone oil in the chitosan fiber, the method is simple, reliable and easy to operate, not only saves measurement cost, but also causes no pollution to environment, and has the advantages of short reaction time, high accuracy, low cost and high efficiency.

Description

technical field [0001] The invention relates to a production process of chitosan fiber, in particular to a method for testing the content of amino silicone oil agent in chitosan fiber. Background technique [0002] In the production process of chitosan fiber, most of the oil containing amino silicone material (amino silicone oil) is used as the finishing agent of the fiber to fully disperse the fiber and facilitate the subsequent processing of the fiber, but the use of amino silicone oil As a fiber finishing agent, the content of amino silicone oil will affect the quality of the fiber. Too much amino silicone oil on the fiber will affect the water absorption, antibacterial and other physical properties of the fiber; if it is too small, the dispersion of the fiber will not be achieved. Therefore, it is particularly important to accurately measure and control the amount of amino silicone oil in chitosan fibers. [0003] Existing chitosan fiber filament and textured silk oil c...

AI Technical Summary

Problems solved by technology

[0002] In the production process of chitosan fiber, most of the oil containing amino silicone material (amino silicone oil) is used as the finishing agent of the fiber to fully disperse the fiber and facilitate the subsequent processing of the fiber, but the use of amino silicone oil As a fiber finishing agent, the content of amino silicone oil will affect the quality of the fiber. Too much amino silicone oil on the fiber will affect the water absorption, antibacterial and other physical properties of the fiber; if it is too small, the dispersion of the fiber will not be achieved. Therefore, it is especially important to accurately measure and control the amount of amino silicone oil in chitosan fibers

[0003] Existing chitosan fiber filament and textured silk oil content assay method mainly comprise following two kinds: 1. adopt Soxhlet extraction method, utilize the property that oil agent can be dissolved in some organic solvents, sample is extracted by fat extractor The oil on the surface is extracted, the obtained extract is evaporated and dried, the non-volatile oil is weighed, and then the oil content on the fiber is calculated. Most organic solvents use isopropanol as a solvent. Isopropanol has a large molecular weight and a high boiling point. Toxic, it takes a lot of time to waste, the work efficiency is low, and the cost is high; 2. Soap washing method, using soap solution to wash the fiber multiple times, so that the non-fibrous substances on the fiber are quantitatively transferred to the soap solution, and weighed The weight difference before and after the fiber, and then calculate the oil content on the fiber

The disadvantage of the above-mentioned method is: the composition of chitosan contains a large amount of amino and carboxyl groups, which is very easy to react with the organic silicon in the amino silicone oil agent in the form of chemical bonds and cause the organic silicon content in the fiber to increase. Difficult to be dissolved by organic solvents or washed off by soap liquid. The existing technology is often dissolved and incompletely washed, which affects the accuracy of the measurement results of amino silicone oil agents; secondly, the use of a large amount of organic solvents also causes environmental pollution and waste of resources.