Deamidation Pathway
Chemical reaction profiles characterize the spontaneous decay of amide-containing residues in wool and specialty fibers during hydrothermal processing. In textile chemistry, asparagine kinetics describe the hydrolytic deamidation of asparagine residues into aspartic acid. This degradation depends on local primary sequences and environmental conditions.
Hydrolysis Rate
The rate of deamidation accelerates when textiles undergo wet thermal finishing at high pH. Long steaming or boiling cycles during dyeing can cause these reactions to progress. Because the conversion rate depends on temperature, monitoring the residual amide content helps assess the cumulative thermal stress of the batch.
Thermal History
Measurement of the accumulation of deamidated products provides a quantitative record of how severely a fiber has been heated. In processed cashmere, the extent of deamidation is much higher than in raw fiber. This chemical marker reveals whether a yarn has been subjected to harsh recycled-fiber recovery processes or excessive scouring.
The resulting data allow manufacturers to reject damaged raw materials before spinning begins.
Processing Diagnostic
Mass spectrometry measures the abundance of deamidated peptides relative to their unmodified forms to construct a chemical timestamp. These ratios offer a forensic tool to verify premium fiber history before garment manufacture. This diagnostic method distinguishes genuine virgin wool from post-consumer reprocessed stock.
