Abstract
The oxidized bamboo pulp fiber yarns were prepared by the HNO3 /H3PO4-NaNO2 oxidation system. The effects of the oxidation concentration and reaction time on the weight loss, the carboxyl content and the breaking strength of the bamboo pulp fiber yarns were studied and the aggregation structure was investigated by Fourier transform infrared, X-ray and scanning electron microscopy. The results revealed an increase in carboxyl content and a decrease in breaking strength of oxidized bamboo pulp fiber yarns with increasing concentration of oxidant and reaction time. The breaking strength of oxidized bamboo fiber yarns was damaged seriously once the reaction time was more than 120 min or the concentration of oxidant was greater than 1.0%. The crystallinity of bamboo pulp fibers increased slightly under low oxidation degree but decreased with higher oxidation degree.
Highlights
Bamboo pulp fiber is generated cellulose fiber and is prepared by viscose spinning process or Lyocell spinning process with bamboo as raw material, and the bamboo pulp fiber currently used mainly on the domestic market is made by viscose spinning process [1]
When the reaction time is more than 120 min, the weight loss of bamboo pulp fiber yarns increased obviously
The breaking strength was damaged obviously once the oxidation concentration was higher than 1.0% or the reaction time longer than 120 min
Summary
Bamboo pulp fiber is generated cellulose fiber and is prepared by viscose spinning process or Lyocell spinning process with bamboo as raw material, and the bamboo pulp fiber currently used mainly on the domestic market is made by viscose spinning process [1]. Selective oxidation of cellulose is the reaction leads the C2, C3 or C6 hydroxyl in the cellulose macromolecular to aldehyde group, ketone group or carboxyl group. It makes oxidation cellulose own the maternal. (2015) Characterization of Structure and Property of the Monocarboxyl Bamboo Pulp Fibers. Reports about the use of selective oxidation of bamboo pulp fiber by HNO3/H3PO4NaNO2 system [7] are rarely
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