Modification method of collagen
A collagen, modification and modification technology is applied in the field of modification and modification of collagen to achieve the effect of improving gel strength and overcoming poor mechanical properties
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Embodiment 1
[0019] The present embodiment provides a modification modification method of collagen, it comprises the following steps:
[0020] (a) 50 g of collagen (commercially available) was dissolved in 0.5 mol / L, 500 ml of acetic acid solution, heated and stirred at 40° C. to dissolve, and the undissolved part was filtered to form a collagen saturated solution;
[0021] (b) Take 100 g (89.5 ml) of the above-mentioned saturated collagen solution, add 0.01 g of proteolytic enzyme therein, and heat and react at 40° C. for 3 hours;
[0022] (c) add 8.95ml chitosan acetic acid solution (concentration is 2wt%) and catalyzer 10g in the product of step (b), get final product at 40 ℃ heating reaction 2 hours; Described catalyzer is made of 0.2gSm 2 o 3 , 0.3gEu 2 o 3 and 0.5gGd 2 o 3 composition.
Embodiment 2
[0024] The present embodiment provides a modification modification method of collagen, it comprises the following steps:
[0025] (a) Dissolve 50g of collagen (extracted from shad skin by existing technology) in 1.5mol / L, 500ml of acetic acid solution, heat and stir at 50°C to dissolve, and filter to remove the undissolved part to form a collagen saturated solution ;
[0026] (b) Take 400g (358ml) of the above-mentioned saturated collagen solution, add 0.4g proteolytic enzyme therein, and heat and react at 50°C for 1 hour;
[0027] (c) in the product of step (b), add 71.6ml chitosan acetic acid solution (concentration is 2wt%) and catalyzer 4g, get final product in 50 ℃ of heating reactions 0.5 hour; Described catalyzer is made of 0.6gSm 2 o 3 , 1gEu 2 o 3 and 2.4gGd 2 o 3 composition.
Embodiment 3
[0029] The present embodiment provides a modification modification method of collagen, it comprises the following steps:
[0030] (a) Dissolve 50 g of collagen (extracted to the front elbow of pig’s trotter by using the prior art) in 2 mol / L, 500 ml of acetic acid solution, heat and stir at 50° C. to dissolve, and filter to remove the undissolved part to form a collagen saturated solution;
[0031] (b) Take 400g (358ml) of the above collagen saturated solution, add 0.1g proteolytic enzyme therein, and heat and react at 45°C for 1.5 hours;
[0032] (c) add 75ml chitosan acetic acid solution (concentration is 2wt%) and catalyzer 1g in the product of step (b), get final product at 45 ℃ of heating reaction 2 hours; Described catalyzer is made of 0.25gSm 2 o 3 , 0.3gEu 2 o 3 and 0.45gGd 2 o 3 composition.
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