A kind of preparation method of poly-γ-glutamic acid/chitosan/nano-zinc oxide antibacterial composite fiber
A nano-zinc oxide and composite fiber technology is applied in the manufacture of conductive/antistatic filaments, fiber chemical characteristics, and conjugated synthetic polymer artificial filaments. It can solve problems that restrict the application of chitosan-based antibacterial materials, and achieve The effect of omitting finishing process, stable structure and simple operation
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Embodiment 1
[0034] (1) Add the poly-γ-glutamic acid solution dropwise to the chitosan spinning solution, and use the electrostatic interaction between the carboxyl group of poly-γ-glutamic acid (γ-PGA) and the amino group of chitosan (CS) The nanoparticles were prepared according to the ratio of the amount of the carboxyl group to the amino group. The mass fraction of chitosan in the chitosan spinning solution is 3%, and the solvent is an acetic acid solution with a volume fraction of 2%; the weight-average molecular weight of the chitosan is 6×10 5 g / mol, the degree of deacetylation is greater than 90%. Under stirring at room temperature (600 r / min), 2 g / L γ-PGA aqueous solution was added dropwise to CS acetate buffer (50 mL, pH=6) at a rate of 6 mL / h using a micro syringe pump. Stir and sonicate for 10 min, and dialyze for 1-3 h to remove unbound small-molecule polymers.
[0035] (2) Weigh the nano-zinc oxide and dissolve it in deionized water, and use an ultrasonic cell crusher to di...
Embodiment 2
[0039](1) Add the poly-γ-glutamic acid solution dropwise to the chitosan spinning solution, and use the electrostatic interaction between the carboxyl group of poly-γ-glutamic acid (γ-PGA) and the amino group of chitosan (CS) The nanoparticles were prepared according to the ratio of the amount of the carboxyl group to the amino group. The mass fraction of chitosan in the chitosan spinning solution is 4%, and the solvent is an acetic acid solution with a volume fraction of 2%; the weight-average molecular weight of the chitosan is 6×10 5 g / mol, the degree of deacetylation is greater than 90%. Under stirring at room temperature (600 r / min), 2 g / L γ-PGA aqueous solution was added dropwise to CS acetate buffer (50 mL, pH=6) at a rate of 6 mL / h using a micro syringe pump. Stir and sonicate for 10 min, and dialyze for 1-3 h to remove unbound small-molecule polymers.
[0040] (2) Weigh the nano-zinc oxide and dissolve it in deionized water, and use an ultrasonic cell crusher to di...
Embodiment 3
[0044] (1) Add the poly-γ-glutamic acid solution dropwise to the chitosan spinning solution, and use the electrostatic interaction between the carboxyl group of poly-γ-glutamic acid (γ-PGA) and the amino group of chitosan (CS) The nanoparticles were prepared according to the ratio of the amount of the carboxyl group to the amino group. The mass fraction of chitosan in the chitosan spinning solution is 5%, and the solvent is 2% acetic acid solution; the molecular weight of chitosan is 6×10 5 g / mol, degree of deacetylation > 90%. Under stirring at room temperature (600 r / min), 2 g / L γ-PGA aqueous solution was added dropwise to CS acetate buffer (50 mL, pH=6) at a rate of 6 mL / h using a micro syringe pump. Stir and sonicate for 10 min, and dialyze for 1-3 h to remove unbound small-molecule polymers.
[0045] (2) Weigh the nano-zinc oxide and dissolve it in deionized water, and use an ultrasonic cell crusher to disperse it in the aqueous solution.
[0046] (3) Dissolving poly-...
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