CN103499315B - Nano fibrous membrane film thickness measurement device - Google Patents
Nano fibrous membrane film thickness measurement device Download PDFInfo
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- CN103499315B CN103499315B CN201310498378.4A CN201310498378A CN103499315B CN 103499315 B CN103499315 B CN 103499315B CN 201310498378 A CN201310498378 A CN 201310498378A CN 103499315 B CN103499315 B CN 103499315B
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- 239000012528 membrane Substances 0.000 title claims abstract description 31
- 238000005259 measurement Methods 0.000 title claims abstract description 18
- 239000002121 nanofiber Substances 0.000 claims abstract description 12
- 238000013480 data collection Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000001523 electrospinning Methods 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 2
- 238000002474 experimental method Methods 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000003028 elevating effect Effects 0.000 description 11
- 239000000835 fiber Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- -1 and therefore Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Nonwoven Fabrics (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Nano fibrous membrane film thickness measurement device, relates to a kind of nano fibrous membrane.It is provided with pulsometer, air filter, fixed pressure reducing valve, choke valve, pneumatic on-off valve, cylinder, pressure transducer, supporting network, sealing ring, motion, data Collection & Processing System；Pulsometer is used for providing source of the gas, and pulsometer is connected with air filter by airway；Fixed pressure reducing valve, choke valve, pneumatic on-off valve pass sequentially through airway and are connected between air filter and cylinder；The online nano-fiber film produced is placed between cylinder bottom and the work platforms of motion；Pressure transducer is connected with the screwed hole of cylinder block lower end；The just through hole that is connected with to cylinder on work platforms, through hole is laid supporting network；The output termination data Collection & Processing System input of pressure transducer, pressure transducer is arranged on cylinder bottom.Principle is simple, it is easy to realize, it is possible to quickly detect the thickness in nano fibrous membrane somewhere, it is only necessary to time several seconds.
Description
Technical field
The present invention relates to a kind of nano fibrous membrane, especially relate to the nano fibrous membrane film thickness measurement device of a kind of on-line checking electro spinning nanometer fiber membrane film thickness uniformity.
Background technology
Nanofiber is with characteristics such as its superior mechanics, optics and electricity, in numerous areas extensive uses such as filtration, noise reduction, sensor, protective clothes, medicine controlled releasing, biological support, flexible electronic and new forms of energy, its commercial application it is crucial that realize the mass manufacture of nanofiber.At present, the batch electrospinning that can manufacture nanofiber on a large scale mainly includes cylinder electrospinning, centrifugal electrospinning etc., and wherein Czech scientific research personnel utilizes drum electric spinning technique develop " nanometer Aranea " equipment and successfully realize commercialization.The thickness evenness of electro spinning nanometer fiber membrane is an important indicator of nano fibrous membrane, and therefore, nanofiber film thickness on-line measurement becomes an important step in fibrous membrane electrospinning manufacture process.
Owing to fibre diameter (nanoscale) is general less (submicron order) than optical wavelength, therefore the method for optical measurement can not be adopted to detect, and adopt ultramicroscope (SEM) method to need to detect under significantly high vacuum, speed is slow, is not suitable for the on-line checking in nano fiber batch manufacturing process.Fibrous membrane manufactures giant Donaldson company (DmitryM.Luzhansky, QualityControlinManufacturingofElectrospunNanofiberCompo sites, InternationalNonwovensTechnicalConference, Baltimore, Maryland, 2003) a kind of nano fibrous membrane thickness detecting method is reported, adopt nozzle specially used film while spray low number density molecule after, by the grain density of the laser counter of film both sides detection fibers film respectively, and then calculate the thickness of membrane.This method is capable of on-line checking, but its cost is high, and environmental requirement is harsh.
Summary of the invention
It is an object of the invention to be difficult to the problems such as online judgement for thickness and uniformity in the production of existing nano fibrous membrane, it is provided that a kind of online nano fibrous membrane film thickness measurement device.
The present invention is provided with pulsometer, air filter, fixed pressure reducing valve, choke valve, pneumatic on-off valve, cylinder, pressure transducer, supporting network, sealing ring, motion, data Collection & Processing System；Described pulsometer is used for providing source of the gas, and pulsometer is connected with air filter by airway；Air filter is used for purifying air, reduces the impurity impacts on film breathability such as dust；Fixed pressure reducing valve, choke valve, pneumatic on-off valve pass sequentially through airway and are connected between air filter and cylinder, for stable and reduction pulsometer outlet stream pressure；The online nano-fiber film produced is placed between cylinder bottom and the work platforms of motion, during measurement by cylinder-pressing on work platforms；Pressure transducer is connected with the screwed hole of cylinder block lower end, for measuring the pressure at cylinder lower port place；The just through hole being connected with for air-flow passes into ambient atmosphere to cylinder on work platforms, through hole edge is provided with sealing ring, and through hole is laid supporting network, and supporting network and sealing ring are respectively used to support nano fibrous membrane and prevent flow leakage when ventilation；The output termination data Collection & Processing System input of pressure transducer, pressure transducer is arranged on cylinder bottom, and data Collection & Processing System is for collecting the pressure data of processing pressure sensor pick-up；Work platforms is driven by driving device, and the direction of motion of work platforms is consistent with the fibrous membrane direction of motion, and both keep identical speed, ensure in the process of on-line measurement with this, without influence on production link.
The sealike colour of described supporting network is smaller than 0.1mm, and netting twine interval can more than 0.5mm.
The range of described pressure transducer is less than 5kPa.
The measurable film thickness range of the present invention is 1～200 μm.
When the present invention mainly utilizes the gas low speed of certain pressure intensity by nano fibrous membrane, gas pressure intensity changes, and the gas pressure intensity after change and nanofiber film thickness are linear approximate relationship.By the pressure of on-line measurement with measured the relational database comparison to obtain pressure and nanofiber thickness by great many of experiments, actual thickness can be obtained.Thickness feedback also can be returned manufacture link simultaneously, adjust electrospinning parameter according to technological data bank, it is ensured that the uniformity of nano fibrous membrane thickness.
The characteristic of the present invention is in that:
1, quickly detection: principles of the invention is simple, and is easily achieved, it is possible to quickly detect the thickness in nano fibrous membrane somewhere, it is only necessary to time several seconds.
2, on-line checking: general thickness adopts off-line measurement mode, it is impossible to suitable in large-scale batch micro operations occasion.
3, device is simple: device feature mostly is standard component, it is easy to realize, with low cost and easy of integration in production line.
Accompanying drawing explanation
Fig. 1 is the structure composition schematic diagram of the embodiment of the present invention.
Fig. 2 is the structure composition schematic diagram of the work platforms of the embodiment of the present invention, supporting network and sealing ring.
The relation of electric current (in order to characterize pressure) and thickness when Fig. 3 is pass into different pressures gas.In figure 3, abscissa is thickness (μm), and vertical coordinate is electric current (mA)；Labelling ◆ for 0.6MPa；■ is 0.4MPa；▲ for 0.2MPa.
Detailed description of the invention
Referring to Fig. 1 and 2, the present invention relates to a kind of online nano fibrous membrane film thickness measurement device, be provided with pulsometer 1, air filter 2(screw thread specification: G1/4), fixed pressure reducing valve 3(AR2000), choke valve 4(LSA8 regulate valve, diameter: 8mm), HVFF8 pneumatic on-off valve 5, cylinder 6, pressure transducer 7(measure scope: 0 2.5KPa), Data collection and precessing system 8, work platforms 10, elevating lever 11, screw mandrel 12, polished rod 13, supporting network 14, sealing ring 15.The gas of pulsometer 1 output is respectively in order after air filter 2, fixed pressure reducing valve 3, choke valve 4 and pneumatic on-off valve 5 obtain predetermined pressure gas, then passes into cylinder 6, and the lower thread hole of cylinder 6 connects pressure transducer 7.Pressure transducer 7 is connected with data Collection & Processing System 8.Cylinder 6 is placed in directly over the round tube hole of work platforms 10 by elevating lever 11 is fixing.Round tube hole is fixed with supporting network 14 and sealing ring 15.Work platforms 10 lies in a horizontal plane on motion, is connected as shown in Figure 1 with leading screw 12, feed rod 13.Leading screw 12 connects a small drive device, driving device direction and speed that the work platforms 10 driven is identical with polyimides (PI) nano fibrous membrane maintenance are advanced.Elevating lever 11 is fixed on work platforms 10 position as shown in Figure 1, the piston rod of hydraulic cylinder drive its lifting to control separating and compression of cylinder 6 and work platforms 10.
The process of detection nanofiber film thickness is as follows:
One, it is first turned on pulsometer 1, starts to pass into gas；Open the driving device driving leading screw 12 simultaneously, drive work platforms 10 to move；
Two, then starting the hydraulic system of elevating lever 11, hydraulic cylinder start makes elevating lever 11 decline.Elevating lever 11 descent tape dynamic air cylinder 6 declines, and is pressed on by nano fibrous membrane on work platforms 10, and when thrust reaches certain value, elevating lever 11 stops declining.Pressure transducer 7 then begins to gather force value, and by automatic data transmission to Data collection and precessing system 8；
Three and then start elevating lever 11 hydraulic system, hydraulic cylinder start makes elevating lever 11 rise.The elevating lever 11 band dynamic air cylinder 6 that rises rises；
Four, last, elevating lever 11 stops when rising to top, drives the driving device reversion of leading screw 12 to return to initial position, prepares to measure next time.
Test result only needs the several seconds as it is shown on figure 3, individual data of the present invention is measured.
Claims (1)
1. nano fibrous membrane film thickness measurement device, it is characterised in that be provided with pulsometer, air filter, fixed pressure reducing valve, choke valve, pneumatic on-off valve, cylinder, pressure transducer, supporting network, sealing ring, motion, data Collection & Processing System；Described pulsometer is used for providing source of the gas, and pulsometer is connected with air filter by airway；Air filter is used for purifying air, reduces the dust impact on film breathability；Fixed pressure reducing valve, choke valve, pneumatic on-off valve pass sequentially through airway and are connected between air filter and cylinder, for stable and reduction pulsometer outlet stream pressure；The online nano-fiber film produced is placed between cylinder bottom and the work platforms of motion, during measurement by cylinder-pressing on work platforms；Pressure transducer is connected with the screwed hole of cylinder block lower end, for measuring the pressure at cylinder lower port place；The just through hole being connected with for air-flow passes into ambient atmosphere to cylinder on work platforms, through hole edge is provided with sealing ring, and through hole is laid supporting network, and supporting network and sealing ring are respectively used to support nano fibrous membrane and prevent flow leakage when ventilation；The output termination data Collection & Processing System input of pressure transducer, pressure transducer is arranged on cylinder bottom, and data Collection & Processing System is for collecting the pressure data of processing pressure sensor pick-up；Work platforms is driven by driving device, and the direction of motion of work platforms is consistent with the fibrous membrane direction of motion, and both keep identical speed, ensure in the process of on-line measurement with this, without influence on production link；
When described nano fibrous membrane film thickness measurement device utilizes the gas low speed of certain pressure intensity by nano fibrous membrane, gas pressure intensity changes, and gas pressure intensity and the fibrous membrane thickness after change is the principle of linear approximate relationship；The relational database of the pressure of on-line measurement with the pressure obtained by great many of experiments measurement with nanofiber thickness is compared, obtains actual thickness；Thickness is fed back to manufacture link simultaneously, adjusts electrospinning parameter according to technological data bank, it is ensured that the uniformity of nano fibrous membrane thickness；The sealike colour of described supporting network is less than 0.1mm, and netting twine interval is more than 0.5mm；The range of described pressure transducer is less than 5kPa；Described thickness is 1～200 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498378.4A CN103499315B (en) | 2013-10-22 | 2013-10-22 | Nano fibrous membrane film thickness measurement device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498378.4A CN103499315B (en) | 2013-10-22 | 2013-10-22 | Nano fibrous membrane film thickness measurement device |
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| Publication Number | Publication Date |
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| CN103499315A CN103499315A (en) | 2014-01-08 |
| CN103499315B true CN103499315B (en) | 2016-06-29 |
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| CN201310498378.4A Expired - Fee Related CN103499315B (en) | 2013-10-22 | 2013-10-22 | Nano fibrous membrane film thickness measurement device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760621B (en) * | 2014-01-14 | 2017-07-07 | 重庆工商职业学院 | Diaphragm micro-hole detection device and its control system |
| CN104279989B (en) * | 2014-10-10 | 2016-10-26 | 中国核动力研究设计院 | A kind of fine structure section thickness air measuring device |
| CN111521515A (en) * | 2020-06-18 | 2020-08-11 | 凤阳凯盛硅材料有限公司 | Method for detecting thickness difference of glass on line |
| CN113776441A (en) * | 2021-09-01 | 2021-12-10 | 江苏仕邦柔性电子研究院有限公司 | Nanofiber membrane film thickness measuring device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654802A (en) * | 1970-05-11 | 1972-04-11 | David G Falconer | Measurement and control apparatus |
| CN201251434Y (en) * | 2008-08-15 | 2009-06-03 | 天津力神电池股份有限公司 | Automatic thickness measuring device |
| CN102205655A (en) * | 2011-04-19 | 2011-10-05 | 吴国逵 | Continuous production process of polyethylene (PE) breathable film |
| CN102410824A (en) * | 2011-08-05 | 2012-04-11 | 北京理工大学 | Device and method for detecting thickness of steel plate |
-
2013
- 2013-10-22 CN CN201310498378.4A patent/CN103499315B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654802A (en) * | 1970-05-11 | 1972-04-11 | David G Falconer | Measurement and control apparatus |
| CN201251434Y (en) * | 2008-08-15 | 2009-06-03 | 天津力神电池股份有限公司 | Automatic thickness measuring device |
| CN102205655A (en) * | 2011-04-19 | 2011-10-05 | 吴国逵 | Continuous production process of polyethylene (PE) breathable film |
| CN102410824A (en) * | 2011-08-05 | 2012-04-11 | 北京理工大学 | Device and method for detecting thickness of steel plate |
Non-Patent Citations (1)
| Title |
|---|
| Quality Control in Manufacturing of Electrospun Nanofiber Composites;Dmitry et al.;《INTC 2003》;20030930;第1-7页 * |
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| CN103499315A (en) | 2014-01-08 |
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