Preparation method for silver-loaded nano particle temperature stimuli responsiveness hybrid nanofiber membrane

Abstract

The invention discloses a preparation method for a silver-loaded nano particle temperature stimuli responsiveness hybrid nanofiber membrane. The method comprises the steps that temperature stimuli responsiveness monomers and functional monomers with heat reactivity groups are copolymerized to form a polymer with the temperature stimuli responsiveness by adopting a free radical polymerization method; the polymer is dissolved in deionized water at room temperature, proper silver nitrate is added into the deionized water with the polymer, the mixture is mixed evenly, and the silver ions in the mixture are reduced to silver nanoparticles through ultraviolet light irradiation; electrostatic spinning is conducted on a polymer aqueous solution with the silver nanoparticles, and the silver-loaded nano particle temperature stimuli responsiveness hybrid nanofiber membrane is obtained. According to the preparation method for the silver-loaded nano particle temperature stimuli responsiveness hybrid nanofiber membrane, the hybrid nanofiber membrane is prepared by adopting an electrostatic spinning method, in the preparation process, water is adopted to serve as the solution, mild conditions are achieved, and harmful and poisonous products are not produced; the silver-loaded nano particle temperature stimuli responsiveness hybrid nanofiber membrane can be stored in the water stably, dissociation does not occur, the temperature stimuli responsiveness is achieved, and the silver-loaded nano particle temperature stimuli responsiveness hybrid nanofiber membrane can be used for catalytic reaction or a substrate with the surface-enhanced Raman spectrum or antiseptic dressing.

Description

technical field

[0001] The invention belongs to the field of preparation of intelligent hybrid nanofiber membranes, in particular to a preparation method of silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membranes. Background technique

[0002] Silver nanoparticles with a size of less than 100 nm have many different properties from macroscopic metallic silver due to quantum size effects, high specific surface area, and high surface energy, such as localized surface plasmon resonance (LSPR) optical properties, surface electric field enhancement effects, catalytic activity Therefore, silver nanoparticles have broad application prospects in the fields of biomedicine, sensors, organic synthesis, cosmetics, water treatment and analysis and detection. However, like other nanoparticles, due to the high surface energy, pure silver nanoparticles are prone to agglomeration, and it is difficult to disperse stably in water or other organic media. In the carr...

Examples

Embodiment 1

[0028] A method for preparing a silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membrane:

[0029] (1) Add temperature stimulus responsive monomer N-isopropylacrylamide and another functional monomer N-methylolacrylamide with thermal reactive groups into ethanol at a molar ratio of 100:20 to prepare a single The reaction solution with a volume concentration of 38.4% was heated up to 60° C. while stirring while blowing nitrogen gas. The initiator azobisisobutyronitrile ethanol solution with a mass concentration of 0.4% was added to the above reaction solution, stirred while blowing nitrogen gas, and reacted at 60° C. for 48 hours. After the reaction is completed and the temperature is lowered to room temperature, an appropriate amount of n-hexane and ether is added to the polymer solution to form a white floc, which is vacuum-dried at room temperature after suction filtration to obtain a white temperature-stimuli-responsive polymer;

[0030](2) The t...

Embodiment 2

[0036] A method for preparing a silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membrane:

[0037] (1) Add temperature stimulus responsive monomer N-isopropylacrylamide and another functional monomer N-methylolacrylamide with thermal reactive groups into ethanol at a molar ratio of 100:20 to prepare a single The reaction solution with a volume concentration of 38.4% was heated up to 60° C. while stirring while blowing nitrogen gas. The initiator azobisisobutyronitrile ethanol solution with a mass concentration of 0.4% was added to the above reaction solution, stirred while blowing nitrogen gas, and reacted at 60° C. for 48 hours. After the reaction is completed and the temperature is lowered to room temperature, an appropriate amount of n-hexane and ether is added to the polymer solution to form a white floc, which is vacuum-dried at room temperature after suction filtration to obtain a white temperature-stimuli-responsive polymer;

[0038] (2) The ...

Embodiment 3

[0043] A method for preparing a silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membrane:

[0044] (1) The temperature stimulus responsive monomer N-isopropylacrylamide and another functional monomer N-methylolacrylamide with thermal reactive groups are added to ethanol at a molar ratio of 100:20 to prepare a single The reaction solution with a volume concentration of 38.42% was heated up to 60° C. while stirring while blowing nitrogen gas. The initiator azobisisobutyronitrile ethanol solution with a mass concentration of 0.43% was added to the above reaction solution, stirred while blowing nitrogen gas, and reacted at 60° C. for 48 hours. After the reaction is completed and the temperature is lowered to room temperature, an appropriate amount of n-hexane and ether is added to the polymer solution to form a white floc, which is vacuum-dried at room temperature after suction filtration to obtain a white temperature-stimuli-responsive polymer;

[0045...

technical field

[0001] The invention belongs to the field of preparation of intelligent hybrid nanofiber membranes, in particular to a preparation method of silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membranes. Background technique

[0002] Silver nanoparticles with a size of less than 100 nm have many different properties from macroscopic metallic silver due to quantum size effects, high specific surface area, and high surface energy, such as localized surface plasmon resonance (LSPR) optical properties, surface electric field enhancement effects, catalytic activity Therefore, silver nanoparticles have broad application prospects in the fields of biomedicine, sensors, organic synthesis, cosmetics, water treatment and analysis and detection. However, like other nanoparticles, due to the high surface energy, pure silver nanoparticles are prone to agglomeration, and it is difficult to disperse stably in water or other organic media. In the carr...

Examples

Embodiment 1

[0028] A method for preparing a silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membrane:

[0029] (1) Add temperature stimulus responsive monomer N-isopropylacrylamide and another functional monomer N-methylolacrylamide with thermal reactive groups into ethanol at a molar ratio of 100:20 to prepare a single The reaction solution with a volume concentration of 38.4% was heated up to 60° C. while stirring while blowing nitrogen gas. The initiator azobisisobutyronitrile ethanol solution with a mass concentration of 0.4% was added to the above reaction solution, stirred while blowing nitrogen gas, and reacted at 60° C. for 48 hours. After the reaction is completed and the temperature is lowered to room temperature, an appropriate amount of n-hexane and ether is added to the polymer solution to form a white floc, which is vacuum-dried at room temperature after suction filtration to obtain a white temperature-stimuli-responsive polymer;

[0030](2) The t...

Embodiment 2

[0036] A method for preparing a silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membrane:

[0037] (1) Add temperature stimulus responsive monomer N-isopropylacrylamide and another functional monomer N-methylolacrylamide with thermal reactive groups into ethanol at a molar ratio of 100:20 to prepare a single The reaction solution with a volume concentration of 38.4% was heated up to 60° C. while stirring while blowing nitrogen gas. The initiator azobisisobutyronitrile ethanol solution with a mass concentration of 0.4% was added to the above reaction solution, stirred while blowing nitrogen gas, and reacted at 60° C. for 48 hours. After the reaction is completed and the temperature is lowered to room temperature, an appropriate amount of n-hexane and ether is added to the polymer solution to form a white floc, which is vacuum-dried at room temperature after suction filtration to obtain a white temperature-stimuli-responsive polymer;

[0038] (2) The ...

Embodiment 3

[0043] A method for preparing a silver-loaded nanoparticle temperature-stimuli-responsive hybrid nanofiber membrane:

[0044] (1) The temperature stimulus responsive monomer N-isopropylacrylamide and another functional monomer N-methylolacrylamide with thermal reactive groups are added to ethanol at a molar ratio of 100:20 to prepare a single The reaction solution with a volume concentration of 38.42% was heated up to 60° C. while stirring while blowing nitrogen gas. The initiator azobisisobutyronitrile ethanol solution with a mass concentration of 0.43% was added to the above reaction solution, stirred while blowing nitrogen gas, and reacted at 60° C. for 48 hours. After the reaction is completed and the temperature is lowered to room temperature, an appropriate amount of n-hexane and ether is added to the polymer solution to form a white floc, which is vacuum-dried at room temperature after suction filtration to obtain a white temperature-stimuli-responsive polymer;

[0045...

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