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Method for enhancing mechanical property of electrospun fibrous membrane

A technology of electrospinning fiber and mechanics, which is applied in the field of nanomaterial preparation, can solve the problems of poor mechanical properties of electrospun nanofiber membranes, affect the porosity of fiber membranes, reduce the purity of fiber membranes, etc., and achieve enhanced mechanical properties and controllability High, good enhancement effect

Active Publication Date: 2022-02-25
WUXI ZHONGKE GUANGYUAN BIOMATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a method for enhancing the mechanical properties of the electrospun fiber membrane, the purpose is to solve the poor mechanical properties of the electrospun nanofiber membrane, the existing improvement method will not only reduce the composition of the fiber membrane itself Purity will also affect the porosity of the fiber membrane itself, and requires additional energy-consuming technical issues

Method used

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  • Method for enhancing mechanical property of electrospun fibrous membrane
  • Method for enhancing mechanical property of electrospun fibrous membrane
  • Method for enhancing mechanical property of electrospun fibrous membrane

Examples

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Comparison scheme
Effect test

Embodiment 1

[0036] Dissolve polyvinylidene fluoride in a mixed solvent of N,N-dimethylformamide (DMF) and acetone (Ace) with a volume ratio of 3:1, and prepare a spinning solution with a mass volume ratio of 25% as a dense layer Spinning solution and non-woven layer spinning solution. Dissolve polylactic acid-glycolic acid copolymer in a mixed solvent with a volume ratio of N,N-dimethylformamide (DMF) and acetone (Ace) of 9:1, and prepare a spinning solution with a mass volume ratio of 47%. As an adhesive layer spinning solution. In the electrospinning process, the drum was used as the receiving device to prepare the electrospun fiber membrane. In the first electrospinning process and the third electrospinning process, the spinning receiving distance was 30 cm; in the second electrospinning process , the receiving distance is set to 12cm. Thus, a three-layer electrospun fiber membrane was obtained based on the addition of an adhesive layer to cause adhesion between the fiber layer and t...

Embodiment 2

[0038] Dissolve polylactic acid in a mixed solvent of N,N-dimethylformamide (DMF) and dichloromethane (DCM) with a volume ratio of 1:4, and prepare a spinning solution with a mass volume ratio of 20% as a dense layer Spinning solution and non-woven layer spinning solution. Dissolve polylactic acid-glycolic acid copolymer in a mixed solvent of N,N-dimethylformamide (DMF) and acetone (Ace) with a volume ratio of 5:1, and prepare a spinning solution with a mass volume ratio of 45%. As an adhesive layer spinning solution. In the electrospinning process, the drum was used as the receiving device to prepare the electrospun fiber membrane. In the first electrospinning process and the third electrospinning process, the spinning receiving distance was 25 cm; in the second electrospinning process , set the spinning receiving distance to 16cm. Thus, a three-layer electrospun fiber membrane was obtained based on the addition of an adhesive layer to cause adhesion between the fiber layer...

Embodiment 3

[0040]Poly L-lactide-co-caprolactone is dissolved in hexafluoroisopropanol (HFIP) and dichloromethane (DCM) in the mixed solvent that the volume ratio is 1:1, is prepared as the mass volume ratio is 20% The spinning solution is used as a dense layer spinning solution and a non-woven layer spinning solution. Dissolve polylactic acid-glycolic acid copolymer in a mixed solvent of N,N-dimethylformamide (DMF) and acetone (Ace) with a volume ratio of 3:1, and prepare a spinning solution with a mass volume ratio of 47%. As an adhesive layer spinning solution. In the electrospinning process, the drum was used as the receiving device to prepare the electrospun fiber membrane. In the first electrospinning process and the third electrospinning process, the spinning receiving distance was 28 cm; in the second electrospinning process , set the spinning acceptance distance to 5 cm. Thus, a three-layer electrospun fiber membrane was obtained based on the addition of an adhesive layer to ca...

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Abstract

The invention belongs to the technical field of nano material preparation, and particularly relates to a method for enhancing the mechanical property of an electrospun fibrous membrane by adding a bonding layer, which is characterized in that a low-volatility solvent is added in a bonding layer spinning solution, and the receiving distance is reduced in the electrostatic spinning process, so that the mechanical property of the electrospun fibrous membrane is enhanced. Due to the low-volatility solvent, the fibers still have certain fluidity when reaching the receiving plate, and are adhered to the compact layer interfibrous membrane under the action of gravity; in addition, the contact parts of the bonding layer and other layers are also adhered, so that the fiber layers are tighter; and finally, the non-woven layer is bound on the bonding layer to form the electrospun fiber membrane with a three-layer structure. The method is easy to operate, high in controllability and good in reinforcing effect, and the porous structure on the surface of the electrospun fiber membrane can be kept; and the porosity of the adhesive layer and the cocrystallization degree during stretching can be adjusted only by adjusting the receiving distance and the content of the low-volatility solvent. The mechanical property of the electrospun fibrous membrane is greatly improved under the condition that the structure is not damaged, so that the electrospun fibrous membrane with the thickness of 200 mu m can bear tension greater than 32 N.

Description

technical field [0001] The invention belongs to the technical field of nanometer material preparation, and in particular relates to a method for enhancing the mechanical properties of electrospun fiber membranes. Background technique [0002] Over the past few decades, extensive R&D has resulted in the creation of novel biomaterials with appropriate biophysical and biochemical properties capable of regenerating damaged tissues and restoring their function. Among engineered biomaterials, polymeric nanofibers have emerged as potential candidates for a variety of biomedical applications, including drug delivery, biosensing, tissue engineering, and regenerative medicine. Attractive features of polymeric nanofibers include large specific surface area, mechanical flexibility, ease of fabrication, easy surface modification to produce functional nanofibers, and their ability to mimic physiological microenvironments in vivo. [0003] As a technology that can directly and continuousl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/4374D01D5/00D04H1/435D04H1/4326D04H1/4318D04H1/4309D04H1/4291D04H1/42D04H1/43D01F1/10
CPCD04H1/728D04H1/4374D01D5/0084D04H1/435D04H1/4326D04H1/4318D04H1/4309D04H1/4291D04H1/42D04H1/43D01F1/10
Inventor 曹阳郑志国栗可心黄建祥张传文
Owner WUXI ZHONGKE GUANGYUAN BIOMATERIALS
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