Modified collagen fibers as well as preparation method and application thereof
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A collagen fiber and modification technology, which is applied in the field of modified collagen fiber and its preparation to achieve the effects of prolonging normal use time, improving mechanical properties and delaying oxidation
Active Publication Date: 2020-12-11
SICHUAN UNIV
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[0003] However, limited by factors such as development cost, preparation process, and product performance, it
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[0063] Example 1
[0064] The present embodiment provides a method for preparing modified collagen fibers, comprising the following steps:
[0065] (1) get 1kg bayberry tannin and add 5kg deionized water, stir until bayberry tannin is all dissolved, obtain the aqueous solution of bayberry tannin, stand-by;
[0066] 3 kg of collagen fibers were placed in a container, 150 kg of deionized water was added, and the collagen fibers were uniformly dispersed in water by stirring to obtain an aqueous dispersion of collagen fibers; the mass ratio of tannin to collagen fibers was 1:3.
[0067] (2) to the aqueous dispersion of collagen fibers prepared in step (1), add the aqueous solution of bayberry tannin prepared in step (1) to obtain a mixture; then use 0.1 mol / L of sodium bicarbonate The aqueous solution adjusts the pH of the mixture to 6.5-7 and keeps it stable. After mechanical stirring for 5 hours, it is filtered through a Buchner funnel, and the solid material is washed with abs...
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[0068] Example 2
[0069] The present embodiment refers to the preparation method of embodiment 1, and the difference is only:
[0070] In step (1), get 3kg bayberry tannin and add 15kg deionized water, stir until bayberry tannin is all dissolved, obtain the aqueous solution of bayberry tannin, stand by;
[0071] Take 3 kg of collagen fibers and put them in a container, add 150 kg of deionized water, and stir to make the collagen fibers evenly dispersed in the water to obtain an aqueous dispersion of collagen fibers; the mass ratio of bayberry tannin to collagen fibers is 1:1.
Example Embodiment
[0072] Example 3
[0073] The present embodiment refers to the preparation method of embodiment 1, and the difference is only:
[0074] In step (1), get 0.3kg of bayberry tannin and add it to 1.5kg of deionized water, and stir until all the bayberry tannins are dissolved, to obtain an aqueous solution of bayberry tannin, set aside for use;
[0075] 3 kg of collagen fibers were taken and placed in a container, 150 kg of deionized water was added, and the collagen fibers were uniformly dispersed in water by stirring to obtain an aqueous dispersion of collagen fibers; the mass ratio of bayberry tannin to collagen fibers was 1:10.
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Abstract
The invention relates to the technical field of functional composite materials, in particular to modified collagen fibers as well as a preparation method and application thereof. The preparation method of the modified collagen fibers comprises the following steps of mixing and reacting vegetable tannin and collagen fibers in a liquid environment with the pH value of 5-8, and performing washing anddrying treatment. According to the invention, by utilizing the structural characteristic that the vegetable tannin is rich in phenolic hydroxyl groups, the vegetable tannin can be combined with the collagen fibers by multiple modes such as multipoint hydrogen bonds, hydrophobic bonds and the like, so that vegetable tannin structures are combined in natural multi-level micro/nano structures of thecollagen fibers; and according to the collagen fibers combined with the vegetable tannin structures, due to the fact that a large number of phenolic hydroxyl structures exist in the vegetable tannin,the compatibility of the collagen fibers and water-based resin is improved, relatively strong hydrogen bond combination can be generated by the collagen fibers and polar groups in the water-based resin, the interface compatibility of the collagen fibers and the water-based resin is greatly improved, and the mechanical property, the water vapor permeability, the aging resistance, the flame retardant property and the like of the water-based resin are improved.
Description
technical field [0001] The invention relates to the technical field of functional composite materials, in particular to a modified collagen fiber and its preparation method and application. Background technique [0002] Water-based resins have poor water and air permeability, and are prone to yellowing and degradation under light, resulting in a decrease in their mechanical properties and thermal stability, so their applications are limited. In order to improve the mechanical properties, thermal stability, water vapor permeability and aging resistance of water-based resin, different functional fillers can be added to it to make composite materials. Such as graphene, carbon nanotubes, montmorillonite, kaolin, nano-dioxide, cellulose, lignin and dopamine, etc., the above-mentioned fillers can improve the mechanical properties and thermal stability of water-based resins. [0003] However, limited by factors such as development cost, preparation process, and product performance...
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