研究目的
To verify the molecular structure of cashmere fibers in each processing step and to examine which process affects the molecular structure of cashmere fibers and what kind of phenomena are occurring.
研究成果
The study clarified the process and cause of the change in molecular structure of cashmere fibers during the textile manufacturing process. The washing process removed wool grease without changing the molecular structure, while bleaching and decoloring processes increased cysteic acid due to oxidation-reduction reactions, affecting the hand touch quality of cashmere fibers.
研究不足
The measurement was limited to the outermost part of the cashmere fiber due to the evanescent light penetration depth of about 1 um, not capturing the internal structure. Future work should verify the effect of bleaching and decolorizing treatment on the internal structure of cashmere fibers.
1：Experimental Design and Method Selection:
Infrared spectroscopy was used to measure the molecular structure of cashmere fibers non-destructively. The ATR method was employed for sample measurement.
2：Sample Selection and Data Sources:
Cashmere fibers from each processing step (raw, washing, bleaching, decoloring) were obtained from a Mongolian factory.
3：List of Experimental Equipment and Materials:
A Fourier transform infrared spectrophotometer (FT-IR, IR-Prestige 21, Shimadzu Corp.) with an ATR prism using artificial diamond mounted with zinc selenide.
4：Experimental Procedures and Operational Workflow:
Each sample was measured 10 times, and an average spectrum for each sample was calculated. Waveform separation analysis was applied to the infrared absorption spectrum to verify changes in molecular structure.
5：Data Analysis Methods:
The absorption spectra were analyzed using waveform separation to examine changes in the molecular structure of cashmere fibers.
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