CN103499315A - Membrane thickness measuring device for nanofiber membrane - Google Patents
Membrane thickness measuring device for nanofiber membrane Download PDFInfo
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- CN103499315A CN103499315A CN201310498378.4A CN201310498378A CN103499315A CN 103499315 A CN103499315 A CN 103499315A CN 201310498378 A CN201310498378 A CN 201310498378A CN 103499315 A CN103499315 A CN 103499315A
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- 239000012528 membrane Substances 0.000 title claims abstract description 31
- 239000002121 nanofiber Substances 0.000 title claims abstract description 16
- 230000033001 locomotion Effects 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000013480 data collection Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 230000035515 penetration Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract 1
- 230000003028 elevating effect Effects 0.000 description 11
- 238000001523 electrospinning Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 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
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003908 quality control method Methods 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)
Abstract
The invention discloses a membrane thickness measuring device for a nanofiber membrane, and relates to a nanofiber membrane. The membrane thickness measuring device is provided with an air pressure pump, an air filter, a fixed-value pressure reducing valve, a throttling valve, a pneumatic switch valve, an air cylinder, a pressure sensor, a support net, a sealing ring, a movement mechanism and a data acquiring and processing system, wherein the air pressure pump is used for supplying an air source, and is connected with the air filter through an air guide tube; the fixed-value pressure reducing valve, the throttling valve and the pneumatic switch valve are connected in sequence between the air filer and the air cylinder through the air guide tube; the nanofiber membrane which is produced on line is arranged between the bottom of the air cylinder and a working platform of the movement mechanism; the pressure sensor is connected with a threaded hole in the lower end of the cylinder body of the air cylinder; a through hole is formed in the working platform over against the lower part of the air cylinder; the support net is laid above the through hole; the output end of the pressure sensor is connected with the input end of the data acquiring and processing system; the pressure sensor is arranged at the bottom of the air cylinder. The device adopts a simple principle, is easy to implement, and can be used for rapidly detecting the membrane thickness of a certain part of the nanofiber membrane within few seconds.
Description
Technical field
The present invention relates to a kind of nano fibrous membrane, especially relate to a kind of nano fibrous membrane film thickness measurement device of online detection electro spinning nanometer fiber membrane film thickness uniformity.
Background technology
The characteristics such as mechanics, optics and electricity that nanofiber is superior with it, in numerous areas widespread uses such as filtration, noise reduction, sensor, protective clothes, medicine controlled releasing, biological support, flexible electronic and new forms of energy, the key of its commercial application is to realize the mass manufacture of nanofiber.At present, the batch electrospinning that can manufacture on a large scale nanofiber mainly comprises cylinder electrospinning, centrifugal electrospinning etc., and wherein the Czech scientific research personnel utilizes the drum electric spinning technique to develop " nanometer spider " equipment and successfully realizes commercialization.The thickness evenness of electro spinning nanometer fiber membrane is an important indicator of nano fibrous membrane, and therefore, the on-line measurement of nanofiber film thickness becomes an important step in tunica fibrosa electrospinning manufacture process.
Due to fibre diameter (nanoscale) generally than optical wavelength little (submicron order), therefore can not adopt the method for optical measurement to be detected, and adopt electron microscope (SEM) method detecting under condition of high vacuum degree very much, speed is slow, is not suitable for the online detection in nano fiber batch manufacturing process.Tunica fibrosa is manufactured giant Donaldson (the Dmitry M.Luzhansky of company, Quality Control in Manufacturing of Electrospun Nanofiber Composites, International Nonwovens Technical Conference, Baltimore, Maryland, 2003) reported a kind of nano fibrous membrane thickness detecting method, after adopting nozzle specially used one side at film to spray the molecule of low number density, distinguish the particle density of detection fibers film by the laser counter of film both sides, and then calculate the thickness of membrane.This method can realize online detection, but its cost is high, to the environmental requirement harshness.
Summary of the invention
The objective of the invention is to be difficult to for thickness and homogeneity in existing nano fibrous membrane production the problems such as online judgement, a kind of online nano fibrous membrane film thickness measurement device is provided.
The present invention is provided with air lift pump, air strainer, fixed pressure reducing valve, throttling valve, pneumatic on-off valve, cylinder, pressure transducer, supporting network, O-ring seal, motion, data Collection & Processing System; Described air lift pump is for providing source of the gas, and air lift pump is connected with air strainer by wireway; Air strainer is used for purifying air, the impact of the impurity such as minimizing dust on the film gas penetration potential; Fixed pressure reducing valve, throttling valve, pneumatic on-off valve are connected between air strainer and cylinder by wireway successively, for the stream pressure stable and outlet of reduction air lift pump; The online nano-fiber film produced is placed between the workbench of cylinder bottom and motion, during measurement by cylinder-pressing on workbench; Pressure transducer is connected with the threaded hole of cylinder block lower end, for measuring the pressure at cylinder lower port place; Below over against cylinder on workbench is provided with for air-flow being passed into to the through hole of ambient atmosphere, and the through hole edge is provided with O-ring seal, lays supporting network on through hole, and supporting network and O-ring seal are respectively used to support nano fibrous membrane and prevent flow leakage when ventilation; The output termination data Collection & Processing System input end of pressure transducer, pressure transducer is arranged on cylinder bottom, and data Collection & Processing System becomes the pressure data sent for the collection and treatment pressure transducer; Workbench is driven by drive unit, and the direction of motion of workbench is consistent with tunica fibrosa direction of motion, and both keep identical speed, with this, guarantees can not affect production link in the process of on-line measurement.
The sealike colour of described supporting network can be less than 0.1mm, and the netting twine interval can be greater than 0.5mm.
The range of described pressure transducer is no more than 5kPa.
The measurable thickness scope of the present invention is 1～200 μ m.
The gas low speed that the present invention mainly utilizes certain pressure intensity during by nano fibrous membrane gas pressure intensity change, the gas pressure intensity after variation and nanofiber film thickness are linear approximate relationship.By the pressure of on-line measurement with by great many of experiments, measure to such an extent that the relational database of pressure and nanofiber thickness is compared, can obtain actual thickness.Also thickness can be fed back to the manufacture link, according to technological data bank, adjust the electrospinning parameter, guarantee the homogeneity of nano fibrous membrane thickness simultaneously.
Characteristic of the present invention is:
1, fast detecting: principle of the present invention is simple, and is easy to realize, can detect fast the thickness in nano fibrous membrane somewhere, only needs time several seconds.
2, the online detection: general thickness adopts the off-line measurement mode, can't be applicable to the large-scale occasion of manufacturing in batches.
3, device is simple: device feature mostly is standard component, easily realizes, with low cost, and easy of integration in production line.
The accompanying drawing explanation
The structure that Fig. 1 is the embodiment of the present invention forms schematic diagram.
The structure of the workbench that Fig. 2 is the embodiment of the present invention, supporting network and O-ring seal forms schematic diagram.
Fig. 3 is the relation that passes into electric current (in order to characterize pressure) and thickness under the condition of different pressures gas.In Fig. 3, horizontal ordinate is thickness (μ m), and ordinate is electric current (mA); Mark ◆ be 0.6MPa; ■ is 0.4MPa; ▲ be 0.2MPa.
Embodiment
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 air lift pump 1, air strainer 2(screw thread specification: G1/4), fixed pressure reducing valve 3(AR2000), throttling valve 4(LSA8 variable valve, 0-2.5KPa), data acquisition and processing (DAP) system 8, workbench 10, elevating lever 11, screw mandrel 12, polished rod 13, supporting network 14, O-ring seal 15 diameter: 8mm), HVFF8 pneumatic on-off valve 5, cylinder 6, pressure transducer 7(measurement range:.The gas of air lift pump 1 output respectively in order after air strainer 2, fixed pressure reducing valve 3, throttling 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 fixedly is placed in directly over the round tube hole of workbench 10 by elevating lever 11.Be fixed with supporting network 14 and O-ring seal 15 on round tube hole.Workbench 10 lies in a horizontal plane on motion, with leading screw 12, feed rod 13, is connected as shown in Figure 1.A small drive device of leading screw 12 connections, the workbench 10 driven by drive unit and polyimide (PI) nano fibrous membrane keep identical direction and speed to advance.Elevating lever 11 is fixed on workbench 10 position as shown in Figure 1, drives its lifting by the piston rod of hydraulic cylinder and carrys out separating and compression of control cylinder 6 and workbench 10.
The process that detects the nanofiber film thickness is as follows:
One, at first open air lift pump 1, start to pass into gas; Open the drive unit that drives leading screw 12 simultaneously, drive workbench 10 motions;
Two, then start the hydraulic system of elevating lever 11, the hydraulic cylinder start descends elevating lever 11.Elevating lever 11 descends and is with dynamic air cylinder 6 to descend, and nano fibrous membrane is pressed on workbench 10, and when snap-in force reaches certain value, elevating lever 11 stops descending.Pressure transducer 7 starts to gather force value subsequently, and automatic data transmission is arrived to data acquisition and processing (DAP) system 8;
Three and then start the hydraulic system of elevating lever 11, the hydraulic cylinder start is risen elevating lever 11.Elevating lever 11 rises and is with dynamic air cylinder 6 to rise;
Four, last, elevating lever 11 stops while rising to top, drives the drive unit reversion of leading screw 12 to get back to initial position, prepares to measure next time.
As shown in Figure 3, individual data of the present invention is measured only needs the several seconds to get final product to test result.
Claims (4)
1. the nano fibrous membrane film thickness measurement device, is characterized in that being provided with air lift pump, air strainer, fixed pressure reducing valve, throttling valve, pneumatic on-off valve, cylinder, pressure transducer, supporting network, O-ring seal, motion, data Collection & Processing System; Described air lift pump is for providing source of the gas, and air lift pump is connected with air strainer by wireway; Air strainer is used for purifying air, the impact of the impurity such as minimizing dust on the film gas penetration potential; Fixed pressure reducing valve, throttling valve, pneumatic on-off valve are connected between air strainer and cylinder by wireway successively, for the stream pressure stable and outlet of reduction air lift pump; The online nano-fiber film produced is placed between the workbench of cylinder bottom and motion, during measurement by cylinder-pressing on workbench; Pressure transducer is connected with the threaded hole of cylinder block lower end, for measuring the pressure at cylinder lower port place; Below over against cylinder on workbench is provided with for air-flow being passed into to the through hole of ambient atmosphere, and the through hole edge is provided with O-ring seal, lays supporting network on through hole, and supporting network and O-ring seal are respectively used to support nano fibrous membrane and prevent flow leakage when ventilation; The output termination data Collection & Processing System input end of pressure transducer, pressure transducer is arranged on cylinder bottom, and data Collection & Processing System becomes the pressure data sent for the collection and treatment pressure transducer; Workbench is driven by drive unit, and the direction of motion of workbench is consistent with tunica fibrosa direction of motion, and both keep identical speed, with this, guarantees can not affect production link in the process of on-line measurement.
2. nano fibrous membrane film thickness measurement device as claimed in claim 1, is characterized in that the sealike colour of described supporting network is less than 0.1mm, and the netting twine interval is greater than 0.5mm.
3. nano fibrous membrane film thickness measurement device as claimed in claim 1, is characterized in that the range of described pressure transducer is no more than 5kPa.
4. nano fibrous membrane film thickness measurement device as claimed in claim 1, is characterized in that described thickness is 1～200 μ m.
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 true CN103499315A (en) | 2014-01-08 |
| CN103499315B CN103499315B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760621A (en) * | 2014-01-14 | 2014-04-30 | 重庆工商职业学院 | Diaphragm micro-hole detection device and control system thereof |
| 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 |
|---|
| DMITRY ET AL.: "Quality Control in Manufacturing of Electrospun Nanofiber Composites", 《INTC 2003》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760621A (en) * | 2014-01-14 | 2014-04-30 | 重庆工商职业学院 | Diaphragm micro-hole detection device and control system thereof |
| 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 |
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| CN103499315B (en) | 2016-06-29 |
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