Airflow-assisted electrostatic spinning instrument with real-time sampling function

A real-time sampling, electrospinning technology, applied in the field of electrospinning, can solve the problems of reduced efficiency, long cycle, energy and material consumption

Active Publication Date: 2014-07-30
福建科盛达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also some limitations in observing electrospun products by scanning electron microscopy, such as the requirement that the sample can withstand vacuum, the sample should be pretreated to remove moisture and volatile substances and other components, and a layer of conductive material ( Often it is gold spraying treatment), etc., so the scanning electron microscope observation cycle of electrospun samples is longer, and the operation process is more cumbersome, which not only consumes more energy and materials, but also takes up a lot of time and reduces efficiency.

Method used

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  • Airflow-assisted electrostatic spinning instrument with real-time sampling function
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  • Airflow-assisted electrostatic spinning instrument with real-time sampling function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] 1. Accurately weigh 1.000 g polyacrylonitrile (PAN, Sigma-Aldrich, M w =150,000) by adding 17 mL of N,N-dimethylformamide (DMF) solution, and stirring with constant temperature and magnetic force for 3 h in a water bath at 35 °C until completely dissolved to obtain the electrospinning stock solution;

[0069] 2. Take 8 mL of the above-mentioned electrospinning stock solution with a disposable medical injection needle, and carry out electrospinning according to the general operation steps of the instrument. The receiving distance (that is, the distance from the needle to the receiving tray) is 15 cm, and the auxiliary fan is not turned on;

[0070] 3. After 15 minutes of electrospinning (electrospinning reaches a stable state), start sampling. The sampler is a glass slide (specification: 25.4 mm×76.2 mm, thickness 1 mm to 1.2 mm), and the sampling time for 45 s;

[0071] 4. Observe the collected samples directly under a high-power optical microscope and take pictures (...

Embodiment 2

[0077] 1. Accurately weigh 1.000 g of PAN and add 17 mL of DMF solution, stir magnetically at a constant temperature in a water bath at 35 °C for 3 h until completely dissolved, and obtain the electrospinning stock solution;

[0078] 2. Take 8 mL of the above-mentioned electrospinning stock solution with a disposable medical injection needle, and carry out electrospinning according to the general operation procedures of the instrument. The conditions of electrospinning are voltage 15.0 kv, feeding speed 0.5 mL / h, temperature 45°C, Receiving distance (15 cm, the auxiliary fan is not turned on;

[0079] 3. After 15 minutes of electrospinning, start sampling, the sampler is a glass slide, and the sampling time is 45 s;

[0080] 4. Observe the collected samples directly under a high-power optical microscope and take pictures (magnification is 600 times, and the lens has 9 million pixels). The observed partial image is as follows Image 6 shown.

[0081] from Image 6 It can be kn...

Embodiment 3

[0083] 1. Accurately weigh 1.792 g of polyvinylpyrrolidone (PVP), add 10 mL of absolute ethanol and 20 mL of distilled water, stir magnetically at room temperature for 2 h until completely dissolved, and obtain the electrospinning stock solution;

[0084] 2. Take 8 mL of the above-mentioned electrospinning stock solution with a disposable medical injection needle, and carry out electrospinning according to the general operation steps of the instrument. The receiving distance is 15 cm, and the auxiliary fan is not turned on;

[0085] 3. After 15 minutes of electrospinning, start sampling, the sampler is a glass slide, and the sampling time is 25 s;

[0086] 4. Observe the collected samples directly under a high-power optical microscope and take pictures (magnification is 600 times, and the lens has 9 million pixels). The observed partial image is as follows Figure 7 shown;

[0087] 5. Another sample was collected and observed with a scanning electron microscope after process...

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Abstract

The invention discloses an airflow-assisted electrostatic spinning instrument with a real-time sampling function, which comprises an electro-spinning room, a sampling room, a humidity and temperature adjusting room and a master control room, wherein all the parts are relatively independent and are reasonably arranged in a relatively large box-type glass shade. The instrument is characterized in that the electro-spinning room is designed in such a way that materials are fed from the bottom while electro-spinning products are received from the top; an auxiliary fan is mounted on a needle head fixing rod in the electro-spinning room and used for forming rising auxiliary airflow in the process of electrostatic spinning to enable the electrostatic spinning to be performed stably and continuously; the sampling room can collect electro-spinning samples at any time without interrupting electro-spinning; samples obtained by the sampling room can be observed preliminarily under a high-power microscope or are further observed under a characterization instrument like a scanning electron microscope; the humidity and temperature adjusting room is provided with a heating rod, communicated with a dehumidifier and used for controlling the temperature and humidity of the electro-spinning room. The airflow-assisted electrostatic spinning instrument aims to overcome a filament phenomenon in the process of electrostatic spinning to enable the electrostatic spinning to be performed stably and continuously.

Description

technical field [0001] The invention relates to the field of electrospinning, in particular to an integrated electrospinning instrument equipped with a sampling device and using a high-power microscope to preliminarily electrospin samples and provided with an "auxiliary airflow". Background technique [0002] Compared with other nanofiber preparation methods (such as stretching method, template synthesis method and phase separation method, etc.), electrospinning technology has higher process controllability, wider application range, simpler equipment, and can Polymer nanofibers are prepared directly and continuously, and the fibers prepared by electrospinning have the advantages of smaller diameter, larger specific surface area and larger aspect ratio. Therefore, the electrospinning method has become a research hotspot in the preparation of ultrafine fibers and nanofibers, and has great industrialization potential and application prospects. According to statistics, there ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D13/02
Inventor 钱庆荣王坤灿罗永晋陈庆华黄宝铨
Owner 福建科盛达科技有限公司
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