The structure and properties of natural sheep casing and artificial films prepared from natural collagen with various crosslinking treatments.

The structure and properties of natural sheep casing and artificial films prepared from natural collagen with various crosslinking treatments.
Int J Biol Macromol. 2019 May 25;:
Authors: Chen X, Zhou L, Xu H, Yamamoto M, Shinoda M, Tada I, Minami S, Urayama K, Yamane H
Abstract
The structure and properties of natural sheep casing and collagen films with various crosslinking treatments have been investigated in detail to develop satisfied artificial casings prepared from collagen. The sheep casing consists of large number of thick collagen fibers oriented at ±45° from longitudinal direction with high-density interwoven network structure. The structural feature of sheep casing gave the special mouthfeel of 'cracking bite' of sausages. Whereas, layered structure filled with fine collagen fibrils and large gaps in collagen film results in poor mechanical properties and higher swelling ratio in water. Furthermore, a degree of denaturation of collagen during extraction process also lead to poor mechanical properties. After glutaraldehyde (GTA) and dehydrothermal (DHT) treatments, the formation of crosslinking improved mechanical properties of collagen films significantly and the tensile strength and tensile modulus increased more than three times compared with those of untreated collagen film in wet before and after boiling. The swelling ratio of treated collagen films also decreased dramatically. No obvious effects on denaturation of co...

Source: International Journal of Biological Macromolecules - May 24, 2019 Category: Biochemistry Authors: Chen X, Zhou L, Xu H, Yamamoto M, Shinoda M, Tada I, Minami S, Urayama K, Yamane H Tags: Int J Biol Macromol Source Type: research