Multi-Function Electrospinning Machine QZNT-E05
Temperature Humidity Controllable Electrospinning Machine QZNT-E0502
Humidity Influence to Electrospinning
Since electrospinning technology sprung up in the 90s of last century, the control of the humidity of the spinning environment is a difficult problem which always troubled extensive science researchers to in-depth study about the electrospinning technology. Therefore, the further development of the electrospinning technology is limited. The major influence of environment humidity to spinning is below:
Influencing the spinning quality:
Ø The uniformity of the fiber diameter;
Ø The pore forming parameters of porous fiber;
Ø The smoothness of the fiber;
Ø Too high humidity will influence the uniformity of the membrane.
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Influencing the spinnability of the spinning solution:
The spinning process of the organic solution is too influenced by the environment humidity. The value of the humidity will influence the change of the air dielectric constant and the magnitude of the electric field. Therefore, it will too influence the spinnability of the solution.
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Influencing the blocking of the nozzle:
Environment humidity will influence the solution volatilization speed directly in the spinning process. Therefore, unsuitable humidity will influence the blocking of the nozzle.
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Influencing the mechanical property of the fiber.
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Dehumidifying ways
To control the humidity of the spinning environment, science researchers mainly use below three ways for dehumidifying:
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Heated dehumidifying:
The ability of dehumidifying is limited, slow response time, the substantive change of the moisture content is not significant.
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Adsorption dehumidifying:
The ability of dehumidifying is limited, slow response time, poor controllability .
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Aerating to pre dehumidification:
Capable of dehumidifying rapidly, the requirement of the equipment design is high.
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Lepton’s electrospinning machine humidity control plan: Â
Feeling the helplessness of the science researchers about the environment humidity influencing the research, in the concept of solving the difficult problem of science equipment humidity control for the science researchers, Lepton’s research and development team devoted significant resources and solved this difficult problem which always troubled the science researchers to do further science research, as well as successfully realized rapidly, high precision control of the electrospinning equipment environment humidity.
Lepton’s equipment adopted the technology plan which aerated to pre dehumidification, optimal designed the equipment’s structure, optimized the air inlet runner’s structure, let the pre dehumidification air can equably spread in the spinning cabinet when it entering and won’t have turbulent flow or other problems. Lepton adopted the high precision, fast response sensor as the humidity detecting sensor, insured the measurement’s timeeanwhile, raised the control algorithm’s response speed and precision, realized precision control of the inletting and exhausting air volume. Insured the high quality humidity control, at the same time, insured the safety of spinning environment in the cabinet, avoided having accidents which resulting from the too thick organic solvent, such as fire, explosion etc.  Â
Through the testing by Foshan Quality Measurement Supervision and Testing Center, the technical parameters of the humidity control of Lepton’s electrospinning machine reached below level:
Testing Item | Unit | Technical Requirements | Testing Results | Item Conclusion |
Humidity Control | RH | Set the humidity control system （20~environment humidity）%±3% | （20~environment humidity）%±3% | Qualified |
Humidity Control Speed | min | Humidity decm indoor humidity to 45%, humidity dece <1min | <1 | Qualified |
Humidity decm indoor humidity to 35%, humidity dece <2min | <2 | Qualified | ||
Humidity decm indoor humidity to 20%, humidity dece <3min | <3 | Qualified |
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The influence of the spinning by the spinning environment temperature:
Solvent’s volatilization speed; the higher the spinning environment temperature, the faster the volatilization of the jet solvent, the better the fiber’s shape.
The environment control plan of Lepton’s electrospinning machine:
Lepton’s team adopted the high precision temperature sensor to detect the environment temperature. It’s capable of detecting any temperature between -40℃ and 80℃. The precision is ±0.5℃, response time is less than 5s. Meanwhile, the heating system adopted the infrared radiation heating system, the power reached 1000W. It’s capable of raising the environment temperature rapidly.
Below is the stander configuration parameters of QZNT-E0502 | ||
No. | Item | Parameters |
1 | High Voltage Power Supply | Output voltage DC0-50KV,  electric current<1mA, load regulation≤0.5％, input voltage AC220±10％ |
2 | Solution Supply System | Injection pump: 1 set1. Solution supply speed range: automatic speed ml/h（0.01ml/h~30.00ml/h）, manual speed ml/min （0.1ml/min-30ml/min）;2. Install-able syringe size: 10ã€20ã€30ml; 3. Solution Pipe:  external diameter 3mm* internal diameter 1.5mm, materials: PTEF, connector: metal Luer taper. |
3 | Jetting System | 1. Single needle nozzle 18-25G, 2 sets each;2. Four needle array nozzle: equipped 21G needle, 8 pcs. |
4 | Collection System | 1. Roller: effective length 200mm, diameter ø80mm, roughness of the roller surface: 3.2μm; roller rotating speed: 0-350r/min, adjustable;2. Panel collection device: 200mm*300mm.  |
5 | Nozzle Slider Guild Rail | Effective size: length less or equal to 500mm, effective stroke 200mm, orientation precision≤0.05mm   |
6 | Environment Control | 1. Temperature control: indoor temperature -70℃, adjustable, precision ±1℃;2. Humidity detection display: precision: humidity±3％RH;3. Exhaust: power 2.4W, capable of setting the exhaust duration and timing exhuast. |
7 | Control System | 7 inches human machine interface;A. NC function1. Nozzle movement system:Mainly included manual speed setting, automatic reciprocating motion speed and stroke setting and relative control button. Capable of setting motion parameters by the users, realized the control function more humanized and visual, provided visual and more flexible operability for fiber quality research. 2. Roller collection device rotate speed control:Different rotate speed of roller collection will influence the fiber shape. Therefore, visual control the roller motion parameters is important for the fiber shape control. This system is capable of not only setting the roller rotate speed, but also setting the roller motion orientation. 3. Solution supply systemSolution supply system is mainly used for solution delivery. The control system mainly controlled the injection pump parameters such as start-stop, fast forward, fast reverse, reset, supply speed etc.B. Timing functionFor many science researchers, experiment time is a very important problem. But the spinning process is relatively long. It’s impossible to watch the time at any moment. Therefore, the timing function will provide great convenience for the science researchers. When the time reach the setting time, 5s later, all execution device will stop, included slider, roller, heater, high voltage power supply.C. Automatic recording, saving parametersThis function is mainly used for recording, saving the parameters. It’s convenient for the users to check the history parameters and compare the experiment results. D. Safety protection function In the process of spinning, the volatilization of the organic solvent will influence the safety of the equipment usage, such as fire, explosion, leakage which resulted from the too high concentration of organic solvent in the cabinet. After the experiment, too high concentration of residual organic waste gas in the cabinet will influence the health of the science researchers. The intake and exhaust control function is capable of setting intake and exhaust parameters as well as the exhaust duration after spinning by the users, effectively protected the safety in the process of using the equipment. |
8 | Safety Protection System | 1. Discharge short circuit protection, so all the device shells connected to the ground to avoid high voltage discharge which will cause damage;2. Run led: in the process of the equipment’s running, the run led displays the equipment’s running status;3. Safe logos: all the high voltage connected parts, ground nd other parts which can be easily touched by the operators have warning logos, in case of misoperation causing any safety problems;4. Exhaust system: the exhaust fan exhausts the residual solvent in the cabinet, in case of fire, explosion, leakage or other accidents; Antistatic system: the machine shell connected to the ground, in case of the operator gets an electric shock.5. Security lock: lock the door when the equipment is running, in case of irrelevant personnel’s misoperation causing the experiment failing or accident;6. Electric leakage protection: avoid electric leakage causing safety accident;7. Inert gases intake function. |
9 | Equipment Appearance | Three windows: lacquered metal plate shell; blue and grey color; LED lamp illumination. Both side windows can be open independently. Size: Tell Us What You NEED
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