Functionalized nanosheet modified collagen fiber and preparation method thereof
A technology of collagen fibers and nanosheets, which is applied in biochemical fiber processing, animal fiber, fiber processing, etc., can solve the problems of not being able to meet the requirements of physical properties and multifunctionality at the same time, limited application fields, and low added value of products. Significant antioxidant and antibacterial properties, simple preparation method, and the effect of improving thermal stability
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Embodiment 1
[0023] Weigh dopamine hydrochloride and add to Na 2 CO 3 -NaHCO 3 In the buffer solution, obtain a dopamine hydrochloride solution; weigh lithium alginate nanosheets and disperse them into the above dopamine hydrochloride solution, and then add ethylenediamine solution, wherein the mass ratio of dopamine hydrochloride, ethylenediamine, and nanosheets is 0.01:0.01:1 After reacting at room temperature for 2 h, tetrakis hydroxymethyl phosphorus sulfate was added to the above reaction solution. The molar ratio of tetrakis hydroxymethyl phosphorus sulfate to nanosheets was 0.01:1. After continuing the reaction for 2 h, the resulting reaction solution was centrifuged , take the supernatant to obtain the functionalized nanosheet dispersion; weigh the collagen fiber and add it to the above-mentioned functionalized nanosheet dispersion with a concentration of 3%, react at room temperature for 4 h, add dropwise a mass ratio of 1: 20% sodium bicarbonate solution to adjust the pH value ...
Embodiment 2
[0026] Weigh dopamine hydrochloride and add to Na 2 CO 3 -NaHCO 3 In the buffer solution, obtain a dopamine hydrochloride solution; weigh lithium alginate nanosheets and disperse them into the above dopamine hydrochloride solution, and then add ethylenediamine solution, wherein the mass ratio of dopamine hydrochloride, ethylenediamine, and nanosheets is 0.01:0.01:1 After reacting at room temperature for 2 h, tetrakis hydroxymethyl phosphorus sulfate was added to the above reaction solution. The molar ratio of tetrakis hydroxymethyl phosphorus sulfate to nanosheets was 0.02:1. After continuing the reaction for 2 h, the obtained reaction solution was centrifuged , take the supernatant to obtain the functionalized nanosheet dispersion; weigh the collagen fiber and add it to the above-mentioned functionalized nanosheet dispersion with a concentration of 3%, react at room temperature for 4 h, add dropwise a mass ratio of 1: 20% sodium bicarbonate solution to adjust the pH value t...
Embodiment 3
[0028] Weigh dopamine hydrochloride and add to Na 2 CO 3 -NaHCO 3 buffer solution to obtain a dopamine hydrochloride solution; weigh the hydrotalcite nanosheets and disperse them into the above-mentioned dopamine hydrochloride solution, and then add ethylenediamine solution, wherein the mass ratio of dopamine hydrochloride, ethylenediamine, and nanosheets is 0.01:0.01:1. After reacting at room temperature for 2 h, gallic acid was added to the above reaction solution. The molar ratio of gallic acid to nanosheets used was 0.01:1. After continuing the reaction for 2 h, the resulting reaction solution was centrifuged, and the supernatant was taken to obtain functionalized nanosheets. sheet dispersion; add collagen fibers to the above-mentioned functionalized nanosheet dispersion with a concentration of 3%, react at room temperature for 4 h, add sodium bicarbonate solution with a mass ratio of 1:20 dropwise to adjust the pH value to 5.0, let stand for 12 h, filter with suction, w...
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