Preparation method of multilayer sandwich type electrostatic-spinning polymer nanofiber composite membrane

A nanofiber and polymer technology, applied in the field of electrospinning, can solve the problems of affecting fiber fineness and filamentation effect, uneven dispersion, unable to exert the structural advantages of ultra-high specific surface area of ​​nanoparticles, and achieve unique structural advantages. , the preparation method is simple, the optional range is flexible

Active Publication Date: 2014-01-01
河北立格新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, most nanoparticles are embedded in the fiber matrix, so they cannot take advantage of the super high specific surface area and unique structure of nanoparticles
Secondly, the choice of solvent will also be severely limited, not only the solubility of the polymer in the solvent, but also the dispersibility of the nanoparticles in the solvent, otherwise it will lead to uneven dispersion of various materials in the solution, and then Affect fiber fineness and silk effect

Method used

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  • Preparation method of multilayer sandwich type electrostatic-spinning polymer nanofiber composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 8g of polylactic acid and 80ml of chloroform and stir magnetically at 40°C for 2h to make a polymer spinning solution with a concentration of 0.1g / ml, which is then added to a traditional electrospinning device; 0.05g of carbon nano Tubes (CNTs) and 200ml of absolute ethanol were mixed and ultrasonically dispersed for 30 minutes to make them uniformly dispersed to make a spray solution containing inorganic nanoparticles with a concentration of 0.25mg / ml; open as figure 1 In the electrospinning device shown, a single-layer fiber membrane is spun on the receiving device as the first layer of fiber membrane; the above-mentioned configured spraying liquid is added to the spray gun, and then the nozzle of the spray gun is aligned with the above-mentioned first layer of fiber On the surface of the film, start the spray gun and start spraying to form a layer of spray coating; then turn on the electrospinning device again to form a second layer of fiber film on the surface o...

Embodiment 2

[0023] Mix 5g of polyvinylidene fluoride and 50ml of dimethylacetamide and stir magnetically at 60°C for 2h to make a polymer spinning solution with a concentration of 0.1g / ml, then add it to the electrospinning device; oxidize 100mg Graphene (GO) and 500ml of distilled water were mixed and then ultrasonically dispersed for 15 minutes to make it uniformly dispersed to make a spray solution containing inorganic nanoparticles with a concentration of 0.2mg / ml; open as figure 1 In the electrostatic spinning device shown, a single-layer fiber film is spun on the receiving device as the first layer of fiber film; the above-mentioned configured spraying liquid is added to the electrostatic spraying device, and then the nozzle of the electrostatic spraying device is aligned with the above-mentioned On the surface of the first layer of fiber membrane, start the electrostatic spraying device to start spraying to form a layer of spray coating; then turn on the electrospinning device again...

Embodiment 3

[0025] Add 12 g of polyacrylonitrile to 120 ml of dimethylacetamide, stir magnetically at 35° C. for 3 h to prepare a polymer spinning solution with a concentration of 0.1 g / ml, and then add it to an electrospinning device. Then prepare spraying liquid by the method for embodiment 2. open as figure 1 In the electrospinning device shown, a single-layer fiber membrane is spun on the receiving device as the first layer of fiber membrane; the above-mentioned configured spraying liquid is added to the spray gun, and then the nozzle of the spray gun is aligned with the above-mentioned first layer of fiber On the surface of the film, start the spray gun and start spraying to form a layer of spray coating; then open the electrospinning device again to form a second layer of fiber film on the surface of the above spray coating, and repeat the above steps of electrospinning and spray coating once, The above five-layer sandwich electrospun polymer nanofiber composite membrane was remove...

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Abstract

The invention discloses a preparation method of a multilayer sandwich type electrostatic-spinning polymer nanofiber composite membrane. The preparation method comprises the steps of firstly, spinning a polymer spinning liquid into a fiber membrane in an electrostatic manner, then spraying a spraying liquid containing inorganic nano-particles to the surface of the electrostatic-spinning fiber membrane by virtue of a jetting technique, continuously spinning the fiber membrane, and repeatedly carrying out the steps according to specific conditions so as to prepare the multilayer sandwich type composite membrane. As the inorganic nano-particles are adhered to the surface of the fiber membrane, not only can the ultrahigh specific area and the specific structural advantage of a nanofiber be brought into full play, but also the selectable ranges of the spraying liquid and the polymer spinning liquid are flexible, so that spraying liquids containing different inorganic nano-particles can be sprayed to electrostatic-spinning fiber membranes made from different raw materials according to actual demands so as to prepare sandwich type composite membranes with different functions, stable structures and good properties, and the application range of the electrostatic-spinning polymer nanofiber composite membranes is expanded.

Description

technical field [0001] The invention belongs to the technical field of electrospinning, in particular to a preparation method of a multi-layer sandwich electrospinning polymer nanofiber composite film. Background technique [0002] Electrospinning technology was first proposed by Formhals in 1934. In recent years, relevant technicians have successfully prepared nanofiber materials with various structures by using electrospinning technology, especially in the preparation of nanocomposite materials, which have achieved remarkable results. figure 1 It is a schematic diagram of a commonly used electrospinning device. Such as figure 1 As shown, this electrospinning device includes a syringe 1, a syringe pump 2, a polymer spinning solution storage tank 3, a receiving drum 4, a motor 5 and a high-voltage power supply 6; wherein; the receiving drum 4 is horizontally arranged in a rotatable manner; The output shaft of the motor 5 is connected with one end of the receiving drum 4, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/02B32B37/06B32B38/16D04H1/728
Inventor 徐志伟岳梦瑶陈磊朱婷杨彩云吕汉明买巍钱晓明
Owner 河北立格新材料科技股份有限公司
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