A kind of antibacterial flame-retardant polycaprolactone film and preparation method thereof
A technology of polycaprolactone and film, applied in the field of composite materials, can solve the problems of difficult uniform dispersion, easy agglomeration, poor modification effect, etc., and achieve the effects of enhancing flame retardancy, improving flame retardancy, and improving stability
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[0040] The embodiment of the present invention provides a kind of preparation method of antibacterial flame-retardant polycaprolactone film, it comprises the following steps:
[0041] S1, disperse divalent metal salt, trivalent metal salt and precipitant in water, react at 120-180° C. for 4-8 hours, and the reaction product is separated, washed and freeze-dried to obtain LDHs nanoparticles.
[0042] Inorganic layered nanoparticles LDHs have small size, large number of surface atoms, insufficient atomic coordination, large surface area and high surface energy. The interlayer of LDHs can form an insulating layer, and the abundant hydroxyl groups between the layers can promote the formation of coke residues, and can generate water vapor and gas after high-temperature pyrolysis, and form micropores to absorb smoke. When in the lactone matrix, it can effectively improve the flame retardancy and smoke suppression performance of the matrix.
[0043] LDHs are prepared by high-tempera...
Embodiment 1
[0067] This embodiment provides an antibacterial and flame-retardant polycaprolactone film (LDHs@PA-Ag / PCL composite film), which is prepared according to the following steps:
[0068] (1) Take 0.50675g of CH 4 N 2 O with 0.37725g of AlCl 3 ·6H 2 O and 0.953g of MgCl 2 ·6H 2 O was mixed and added to 31.25 mL of deionized water, ultrasonicated for 30 min, then transferred into a reaction kettle, and placed in an environment of 160 ° C for 6 h. After centrifugation and washing, freeze-drying is carried out to obtain LDHs nanoparticles.
[0069] (2) Add 100 mL of deionized water to 0.05 g of LDHs nanoparticles, ultrasonically disperse for 45 min, add 0.05 g of 70 wt% PA solution (0.053 mmol), and magnetically stir and adsorb for 15 min at room temperature to obtain a PA-dissolved LDHs dispersion.
[0070] (3) Weigh 0.00917g of AgNO 3 (0.054mmol) was added to the LDHs dispersion and reacted at 70°C for 2 hours. During the reaction, the color of the solution became darker an...
Embodiment 2
[0073] This embodiment provides an antibacterial flame-retardant polycaprolactone film (LDHs@PA-Cu 2+ / PCL composite film), which is prepared according to the following steps:
[0074] (1) Take 0.50675g of CH 4 N 2 O with 0.37725g of AlCl 3 ·6H 2 O and 0.953g of MgCl 2 ·6H 2 O was mixed and added to 31.25 mL of deionized water, ultrasonicated for 30 min, then transferred into a reaction kettle, and placed in an environment of 160 ° C for 6 h. After centrifugation and washing, freeze-drying is carried out to obtain LDHs nanoparticles.
[0075] (2) Add 100 mL of deionized water to 0.05 g of LDHs nanoparticles, ultrasonically disperse for 45 min, add 0.05 g of 70 wt% PA solution (0.053 mmol), and magnetically stir and adsorb for 15 min at room temperature to obtain a PA-dissolved LDHs dispersion.
[0076] (3) Weigh 0.00736g of CuCl 2 2H 2 O (0.054mmol) was added to the LDHs dispersion and reacted at 70°C for 2h. During the reaction, the color of the solution gradually tu...
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