High-strength and toughness collagenous fiber matrix, skeleton material and structural material and preparation methods thereof
A collagen fiber and skeleton material technology, which is applied in the fields of structural materials and their preparation, high-strength collagen fiber matrix, and skeleton materials, can solve the problem of inability to take into account strength and toughness, and achieve the effect of ensuring reproducibility and sustainability.
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[0061] In a specific embodiment of the present invention, the preparation method of the tannin-modified collagen fibers includes: mixing and reacting tannin and collagen fibers in a liquid environment with a pH of 5-6, followed by washing and drying.
[0062] In a specific embodiment of the present invention, the tannin includes any one or more of bayberry tannin, black wattle tannin, larch tannin, quebracho tannin and acacia tannin, preferably Bayberry tannin.
[0063] In a specific embodiment of the present invention, the mass ratio of the tannin to the collagen fiber is 1:(2-4). As in different embodiments, the mass ratio of the tannins to the collagen fibers may be 1:2, 1:2.5, 1:3, 1:3.5, 1:4 and so on.
[0064] In a specific embodiment of the present invention, after mixing the aqueous solution of tannin and the aqueous dispersion of collagen fibers, the reaction is carried out by adjusting the pH to 5-6 with alkali. As in various embodiments, the pH of the liquid envir...
Embodiment 1
[0124] This embodiment provides a method for preparing a high-strength collagen fiber matrix, including the following steps:
[0125] (1) Preparation of tannin-modified collagen fibers
[0126] Dissolving 100g bayberry tannin in 500g deionized water, stirring until completely dissolved, obtains the aqueous solution of bayberry tannin, which is set aside;
[0127] Take 300g of collagen fibers and place them in a beaker, add 15kg of deionized water, stir, and wait for the collagen fibers to be evenly dispersed in the water, add the prepared aqueous solution of bayberry tannin, and use NaHCO with a concentration of 0.1mol / L 3 Adjust the pH of the solution to 5.4-5.8 and keep it stable. After mechanical stirring for 5 hours, filter through a Buchner funnel, wash the reacted material with absolute ethanol, and repeat 3 times to remove unreacted bayberry tannins; dry at 80±2°C After 24 hours, bayberry tannin modified collagen fibers were obtained.
[0128] (2) Preparation of high-...
Embodiment 2
[0132] This embodiment provides a method for preparing a high-strength collagen fiber matrix, including the following steps:
[0133] (1) Preparation of tannin-modified collagen fibers
[0134] With embodiment 1.
[0135] (2) Preparation of high-strength and tough collagen fiber matrix
[0136] 12g CaCl 2 Dissolve in 0.4L deionized water to give CaCl 2 Aqueous solution; take 10g bayberry tannin modified collagen fiber and add it to 1.4L water, adjust the pH to 7.8-8.2, add 3.3g KH 2 PO 4 and 30.384g Na 2 HPO 4 12H 2 O, to obtain a suspension containing collagen fibers; the CaCl 2 The aqueous solution and the suspension containing collagen fibers were placed in a water bath at 2°C for 30 min, and then CaCl 2 The aqueous solution is poured into the suspension containing collagen fibers, and after stirring at 1000 r / min for about 90 minutes, a high-strength collagen fiber matrix with calcium phosphate crystals grown is obtained.
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Abstract
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