Preparation method of degradable polycarbonate butanediol ester electrospinning fiber films

A polybutylene carbonate, electrospinning fiber technology, applied in fiber processing, textiles and papermaking, non-woven fabrics and other directions, can solve the problems of long degradation time, slow crystallization speed, high crystallinity, and achieve good mechanical strength, The effect of short degradation cycle and simple operation

Inactive Publication Date: 2012-11-21
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, PCL also takes too long to degrade due to its poor hydrophilicity and high crystallinity
[0005] Polybutylene carbonate (PBC) is a degradable polyester material synthesized at the end of the 20th century. It is similar to PCL in the main chain structure, and its mechanical properties and thermal properties are very close to PCL. The slow crystallization rate makes it difficult to process and shape, so it has not attracted enough attention
However, as the shortcoming of PCL's long degradation cycle becomes more and more prominent with the deepening of research, how to use PBC, a rapidly degradable material, has become a work worth studying.

Method used

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  • Preparation method of degradable polycarbonate butanediol ester electrospinning fiber films

Examples

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Effect test

Embodiment 1

[0028] Cut the PBC with a number average molecular weight of 80,000 into small pieces, dissolve it in hexafluoroisopropanol to prepare a solution with a mass fraction of 8%, add the solution to the barrel, and extrude it through a propelling device. The supply is 0.5mL / h, the electrospinning voltage is 25kV, the distance is 20cm, and the flat plate receiving device continuously receives for 10h to prepare a 0.4mm thick electrospun fiber membrane with an average fiber diameter of 400nm, fiber membrane yield strength of 1.2MPa, and breaking strength of 7MPa. The elongation at break is 70%. Fiber membrane scanning electron microscopy photos such as figure 1 Shown.

[0029] Take the fiber membrane into a disc shape, after soaking for many times to confirm that there is no hexafluoroisopropanol residue, it can be used as the last layer of water filtration microfiltration membrane, which can effectively adsorb metal ions and submicron particles in water And block bacteria.

Embodiment 2

[0031] Cut the PBC with a number average molecular weight of 150,000 into pieces, mix with 5% polyvinylpyrrolidone (PVP) of its own mass, and heat and dissolve it in dimethylformamide to prepare a solution with a PBC mass fraction of 18%. Add the solution to In the barrel with heat preservation function, keep it at 45°C and extrude it through the pusher. The supply is 1mL / h, the electrospinning voltage is 35kV, and the receiving distance is 30cm. Using assembly line operation, the other part of the loaded filter is slowly moved from the electrospinning nozzle, the filter continuously receives the fiber membrane for 1h, and finally a layer of electrospun fiber membrane with a thickness of about 0.1mm is covered on the filter. The average fiber diameter is 400nm, and the composite filter is soaked in ethanol several times to remove the PVP contained on the fiber, and a fiber membrane material with a large number of regular pore structures on the fiber surface is obtained, which is...

Embodiment 3

[0033] Cut PBC with a number average molecular weight of 100,000 and dissolve it in acetic acid to prepare a solution with a PBC mass fraction of 18%. Add the cyanoacrylate nanospheres coated with nerve growth drugs to the electrospinning raw material liquid After neutralizing and fully dispersing it evenly, electrospinning is carried out. The solution is added to the barrel and extruded through the pushing device. The supply is 0.75mL / h, the electrospinning voltage is 20kV, the receiving distance is 15cm, and the drum receiver continuously receives 20h. The drum has a linear speed of 9m / s and an electrospun fiber membrane with a thickness of 0.7mm is prepared. The average fiber diameter is 450nm, the yield strength of the fiber membrane in the orientation direction is 3MPa, the breaking strength is 12MPa, and the elongation at break is 120%.

[0034] Take the fiber membrane and soak it in ethanol several times to remove the solvent acetic acid, and then wind it into a tube in the...

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Abstract

The invention relates to a preparation method of degradable polycarbonate butanediol ester electrospinning fiber membranes. The preparation method comprises the following steps that (1) polycarbonate butanediol ester is sheared into pieces to be added into solvents, modification components are added, the polycarbonate butanediol ester is dissolved through stirring, and in addition, the modification components are fully and uniformly dispersed; and (2) spinning liquid is obtained and is subjected to electrostatic spinning to obtain electrospinning fiber membrane materials. The electrospinning fiber membrane materials have the advantages that the mechanical strength is good, the fiber diameter is adjustable and controllable, the degradation period of the prepared materials is short, and the purpose is wide. The preparation method provided by the invention has the advantages that the operation is simple, and the cost is low.

Description

Technical field [0001] The invention belongs to the field of preparation of electrospun fiber membranes, and particularly relates to a preparation method of degradable polybutylene carbonate electrospun fiber membranes. Background technique [0002] Electrospinning is a common technology for processing and preparing nanofibers. This method can prepare fibers with a fiber diameter of 2nm to tens of microns. The stack of these fibers can form a non-woven fabric with a very large specific surface area. The principle of this technical method is described as follows: prepare a polymer into a polymer solution or melt, add the solution or melt to a storage device, and slowly extrude it through a pushing device. On the other hand, a high voltage of thousands to tens of thousands of volts is applied to the discharge port. This high voltage has two effects: it makes the surface of the polymer solution or melt carry a large amount of charge, and secondly, it generates a electric field. Un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/413D04H1/435D01D5/00
Inventor 沈新元邵成华顾晓华杨庆
Owner DONGHUA UNIV
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