Effect of the pH on the piezoelectric properties of collagen films

Collagen films from swim bladders: Preparation method and properties

“…Hickman et al [51], for example, reported the T d (measured by DSC) of fish and bovine collagens as 29.8 and 40.1 • C, respectively. Regarding to collagens films, the literature registered a range from 55.23 to 80.55 • C, for films prepared from bovine serosa [22,46,[52][53][54]. These values reflect the good thermal stability achieved by the Pisces films prepared here.…”

“…Then, is expected higher T d for the collagens with higher content of this imino acid. For collagen films, several other parameters such as solvent, ionic strength, pH, humidity, can contribute to T d values and the analysis becomes more complex [6,42,[46][47][48][49][50].…”

A Novel Enzymatic Method for Preparation and Characterization of Collagen Film from Swim Bladder of Fish Rohu (<i>Labeo rohita</i>)

“…Moreover thermostability of fish collagen from the internal tissues (swim bladders and bones) was slightly higher than that of pepsin solubilized collagen from the external tissues (fins, scales and skins) [24]. Collagen film prepared from bovine serosa registered a denaturation temperature range from 55.23˚C to 80.55˚C [25] [26]. Moreover the thermal stability of the fish collagen depends on several factors like physiological temperature of the fish, species to which it belongs and has direct correlation with imino acid (proline and hydroxyproline) content.…”

Apatite coating on anionic and native collagen films by an alternate soaking process

“…Within the period D of the microfibrillar assembly, with respect to the native molecule, the increase in negative charge density is established at the extreme ends of the gap and the overlap with the center is highly positive [23]. This hydrolyzed collagen, besides being highly biocompatible [24,25], is quite effective in the treatment of periodontal disease when associated with the guided tissue regeneration technique [26] and the presence of extra carboxylic groups enhances its dielectric properties [27,28].…”