Physicochemical properties of yak skin collagen bundles and collagen fiber films prepared with different acids

  • ZHOU Lihua ,
  • LUO Yihao ,
  • SUN Wancheng
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  • (College of Agriculture and Animal Husbandry, Qinghai University, Xining 810016, China)

Received date: 2025-07-07

  Revised date: 2025-09-11

  Online published: 2026-05-07

Abstract

Collagen fiber film has an important role in sausage processing industry as an edible film.It was dedicated to investigate hydrochloric acid and acetic acid as swelling acids to prepare collagen fiber film from yak skin.The effect of acid swelling on the physicochemical properties of collagen fiber film was investigated.The fiber arrangement, triple-helix structure, and thermal stability in the collagen fiber film by scanning electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), X-diffraction (XRD), and thermogravimetric analysis (TGA) was also characterized.The results showed that the hydrochloric acid group had greater tensile strength, lower water content, transmittance value, thermal shrinkage, swelling rate, and thermal swelling rate.SEM, XRD, TGA, and FTIR data indicated that yak skin collagen fibers formed collagen fiber bundles during acid swelling.The collagen fiber bundles in hydrochloric acid group were smaller and more ordered, which promoted intramolecular and intermolecular mutual cross-linking, and possessed higher triple-helix content, and could form a denser membrane structure.The hydrochloric acid treatment significantly improved the comprehensive performance of the collagen fiber membrane by regulating the microstructure of yak skin collagen fibers.

Cite this article

ZHOU Lihua , LUO Yihao , SUN Wancheng . Physicochemical properties of yak skin collagen bundles and collagen fiber films prepared with different acids[J]. Food and Fermentation Industries, 2026 , 52(8) : 210 -216 . DOI: 10.13995/j.cnki.11-1802/ts.043824

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