Hydrophilic antibacterial composite nano fibrous membrane and preparation method thereof

A composite nanofiber, antibacterial technology, applied in the field of preparation of polysulfone composite nanofiber membrane, can solve the problems of failing to improve the mechanical properties of the fiber membrane at the same time, insufficient cohesion of electrospinning fibers, weak cohesion, etc. The effect of improving the filtration effect, improving the mechanical properties, and improving the swelling characteristics

Inactive Publication Date: 2012-12-19
SUZHOU UNIV
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Problems solved by technology

However, these methods have not simultaneously improved the mechanical properties of the fibrous membrane.
At present, the methods to improve the mechanical properties of electrospun fiber membranes mainly include heating method and composite reinforcement method, but the bonding force between the electrospun fiber layers obtained by the heating method is not enough, and delamination is easy to occur, while the composite reinforcement method is better than the electrospun fiber membrane and composite reinforcement method. It is also easy to produce weak bonding between reinforced support materials

Method used

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  • Hydrophilic antibacterial composite nano fibrous membrane and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: a kind of preparation method of hydrophilic antibacterial composite nanofiber membrane comprises the following steps:

[0021] (1) Weigh 2g of polysulfone resin particles (weight average molecular weight is 75000), dissolve in 8g of N,N-dimethylformamide solvent at room temperature, stir and dissolve fully at room temperature, the obtained mass fraction is 20% polysulfone solution. Electrospinning is then carried out, and the spinning process parameters are as follows: the spinning voltage is 12kv, the spinning distance is 15cm, and the spinning liquid flow rate is 1.5ml / h. Obtain as-spun polysulfone fiber membrane.

[0022] (2) After the solvent in the fiber is completely volatilized, the as-spun polysulfone fiber membrane is compacted and fixed evenly, and heat-treated at 190° C. for 2 hours in an electric heating constant temperature blast drying oven.

[0023] (3) Oxygen plasma pretreatment is carried out at room temperature, and the processing par...

Embodiment 2

[0033] Embodiment two: the preparation process of the present embodiment is identical with embodiment one, and during chitosan padding process, process parameter condition is: 1.5% chitosan solution 25ml, glutaraldehyde 75 μ l, liquid carrying rate 92%, 2 %NaOH solution for 1 hour, and dried at 40°C.

[0034] After measurement, the fracture strength of the chitosan / polysulfone composite nanofiber membrane prepared in this example is 7.66±0.56MPa, the elongation at break is 43.3±14.1%, and the strength increase rate is 27.5%; the maximum pore size is 2.92 μm, and the minimum pore size 2.65μm, the average pore size is 2.75μm, and the average pore size is reduced by 38.9%; the contact angle at 0.1s is 52.8°±1, and the deionized water droplet can be completely absorbed by the membrane within 40s, which is 127.4° compared with the original contact angle at 0.1s ±1, a reduction of 58.6%.

Embodiment 3

[0035]Embodiment three: the preparation process of the present embodiment is identical with embodiment one, and when chitosan padding is handled, process parameter condition is:

[0036] 25ml of 2% chitosan solution, 60μl of glutaraldehyde, 81% liquid retention rate, 2% NaOH solution for 1 hour, and dried at 40°C.

[0037] After measurement, the breaking strength of the chitosan / polysulfone composite nanofiber membrane prepared in this example is 8.14±0.78MPa, the elongation at break is 48.79±13.09, and the strength increase rate is 35.4%; the maximum pore size is 3.12 μm, and the minimum pore size 2.8μm, the average pore size is 2.95μm, and the average pore size is reduced by 34.4%; the contact angle at 0.1s is 90.1°±2, and the deionized water droplet can be completely absorbed by the membrane within 1min, which is 127.4° compared with the original contact angle at 0.1s ±1, a decrease of 29.3%.

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Abstract

The invention discloses a hydrophilic antibacterial composite nano fibrous membrane and a preparation method of the hydrophilic antibacterial composite nano fibrous membrane. The preparation method comprises the steps of: preparing a primary-spun polysulfone fibrous membrane by adopting an electrostatic spinning method, carrying out heat treatment on the primary-spun polysulfone fibrous membrane, and carrying out padding treatment on the polysulfone fibrous membrane with glutaric dialdehyde/chitosan solution after oxygen plasma treatment so that the solution entrainment rate is 80-100%; and hanging the padded membrane, drying at 30-40 DEG C, then immersing in 1-3% NaOH solution for treating for 1-2h, taking out, washing with deionized water to be neutral and drying at 35-50 DEG C. According to the invention, the hydrophilicity of the membrane is improved, the mechanical property of the membrane is effectively improved, the average pore size of the fibrous membrane is reduced and the filtering effect is improved.

Description

technical field [0001] The invention relates to a preparation method of a nanofiber membrane, in particular to a preparation method of a polysulfone composite nanofiber membrane which can be used as a filter membrane. Background technique [0002] The fiber membrane obtained by electrospinning has a continuous three-dimensional pore structure, and the fiber diameter is tens of nanometers to several micrometers. It has a high specific surface area and high surface adsorption energy, and is suitable for use as a liquid filter material. Liquid filter materials must have good chemical stability, be able to meet the requirements of filtration resistance, and have good anti-fouling properties. At present, the high polymers used in liquid filter materials mainly include polyethylene, polypropylene, polysulfone, polyvinylidene fluoride, etc. Among them, polysulfone is widely used as a liquid filter material because of its excellent chemical stability and heat resistance. Raw materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/00D06M15/03D06M13/123D06M11/38D06M101/30
Inventor 潘志娟刘雷艮张露潘芳良王丹飞
Owner SUZHOU UNIV
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