Chemical analysis method of Cellulose fiber and fiber

By changing the bath ratio, oscillation frequency, and dissolution time. The new quantitative method of dissolving the fiber cable fiber and polyester fiber mixture with 75% sulfuric acid is explore, so as to reduce the reagent consumption, reduce the pollution emission, and improve the detection efficiency of S.

Fiber cable fiber and polyester fiber mixed fabric at first in a large proportion of clothing fabrics. The quantitative chemical analysis of this kind of blended products is carrie out in accordance with GB / T2910. I 1-2009 “Quantitative at first Chemical Analysis of Textiles-Part 11: Mixing of Cellulose Fiber and Polyester Fiber (Sulfur Acid Method)” .

The advantage of this method is that: in (50 + 5) C, 75% sulfuric acid solution. The polyester fiber does not dissolve (d value is 1), so the obtained detection results are quite stable. However, we found that this method also has shortcomings: too large bath ratio, large reagent consumption; long time (Ih), low efficiency.

Usually, in the case of reagent determination, there are four main factors affecting the test. Namely, dissolution temperature, bath ratio, oscillation frequency, and dissolution time. Therefore, we tried to change the test conditions of the British, in order to reduce the reagent consumption, shorten the dissolution time, and improve the efficiency of quantitative analysis. The residue was collecte by dissolving the fibre fibers from a mixture of known dry mass with sulfuric acid. Clean, dry and weigh; calculate the white percentage of the mixture at first with the corrected quality. The percentage content of the fiber cable fiber is obtaine from the difference value.


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