CN1916681A - Embedment structure of optical fiber and embedment method for enhancing cohesive force between optical fiber and packaging material - Google Patents
Embedment structure of optical fiber and embedment method for enhancing cohesive force between optical fiber and packaging material Download PDFInfo
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- CN1916681A CN1916681A CN 200610037372 CN200610037372A CN1916681A CN 1916681 A CN1916681 A CN 1916681A CN 200610037372 CN200610037372 CN 200610037372 CN 200610037372 A CN200610037372 A CN 200610037372A CN 1916681 A CN1916681 A CN 1916681A
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- optical fiber
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- silane coupling
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Abstract
A method for burying optical fiber and its packaging material includes coating adhesive uniformly on surface of optical fiber to be buried and optical fiber sensing element, soaking it in silane coupler after said adhesive is cured, drying up coupler on optical fiber in the air then positioning it in mould, setting portion to be buried on central axle of mould and adding silane coupler in packaging material to make curing-forming. The burying structure for realizing said method is also disclosed.
Description
Technical field
The present invention relates to the embedding structure and the embedding method of optical fiber.
Background technology
In recent years, optical fiber has been widely used in fields such as communication and sensing.On purposes, optical fiber or be used for signal transmission, or as functional form sensor (Fibre Optical Sensor or fiber-optic grating sensor).As sensing element; because its smooth surface; and be prone to slippage phenomenon between measurand; so that sensing result departs from actual value; add its fragility, easily broken, to radially pressure is not too responsive, as seen how exposed optical fiber is effectively protected during sensing; the measuring accuracy and the sensitivity that how to reduce the measuring error that causes owing to slippage and improve sensing device just become problem demanding prompt solution, therefore are necessary to develop the practical embedding technology of optical fiber.
How to carry out embedding to optical fiber is the problem that Fibre Optical Sensor practicability must be faced, and also becomes the hot issue of present stage sensory field of optic fibre research.There is the scholar to attempt using different encapsulating materials and structure, to reach the protection nuditing fiber and to increase the purpose of Fibre Optical Sensor sensitivity: such as optical fiber being integrated in the compound substance such as graphite-epoxy resin, or the use teflon, the encapsulation of polymeric materials such as polyurethane; Use metal sleeve or ladder beam-corrugated tube to carry out packaging protection for sensing unit (as fiber grating) position, play sensitization simultaneously; Also have the scholar to be coated with one deck coupling agent in the fiber grating zone, apply with polymkeric substance again, this method can be eliminated in the encapsulation process because the warbling of fiber grating reflectance spectrum that the inhomogeneous contraction of polymeric material causes improves the sensitivity of fiber-optic grating sensor to temperature sensing.But all there is same problem in these packaged types: be non-rigid connection between encapsulating material and the optical fiber, generation deformation is asynchronous, when ambient pressure causes the bonding position shearing force big, bonding dislocation easily comes off, influence is to the protection effect of optical fiber, make sensing unit susceptibility descend simultaneously, can't guarantee the accuracy of measuring; And the structure of above packaged type more complicated often, certain difficulty is being arranged aspect the practicality popularization.
Summary of the invention
For improving the deficiency of the embedding technology of existing fiber; the present invention proposes a kind of new enhancing optical fiber and the embedding structure of optical fiber and the embedding method of encapsulating material cohesive force; its principle is reliable; technology and structure are all simple; can improve the cohesive force between optical fiber and the encapsulating material effectively; temperature influence is less; when causing encapsulating material deformation big, change of external conditions still can be good at protecting optical fiber; and since between optical fiber and the encapsulating material bonding closely make pressure etc. act on the to be measured of encapsulating material surface and can be delivered to embedding sensing unit place more accurately.
For reaching above-mentioned purpose, the present invention proposes the embedding structure of following optical fiber: the overlay surface applied tackifier in optical fiber or Fibre Optical Sensor unit is encapsulating material layer outside adhesive layer, all is doped with silane coupling agent in adhesive layer and the encapsulating material layer.
Described encapsulating material can be silicon rubber, silica gel, polyurethane, teflon etc. can with the polymkeric substance of coupling agent generation coupling reaction, the wherein best results of silicon rubber.
Described tackifier is modified acroleic acid fat tackifier, epoxy resin mixing multi-purpose adhesive, acrylate glass cement or its analog etc.These adhesive bonds intensity height, glue-line is pliable and tough, elasticity is good, and ageing resistance is good, withstand shock and vibrations, and waterproof, heat-resisting, antiacid alkali.
As preferred version, the thickness of described adhesive layer is 0.3～0.8mm, and the thickness of encapsulating material layer is about 1cm.
Described silane coupled agent molecule has two reactive groups that can be used for coupling organic polymer and inorganic material.
Described silane coupling agent is preferred: vinyltriethoxysilane, N-(β-aminoethyl-)-Y-aminopropyl triethoxysilane, γ-(2,3-epoxy third oxygen) propyl trimethoxy silicon or gamma-aminopropyl-triethoxy-silane.
The concrete method of implementing of above-mentioned embedding structure is as follows: evenly apply described tackifier on the overlay surface for the treatment of embedding optical fiber or Fibre Optical Sensor unit, after adhesive layer solidifies it is immersed in the silane coupling agent, after treating that adhesive layer is soaked into fully by coupling agent, the optical fiber taking-up is hung at normal temperatures until coupling agent hydrolysis drying, then optical fiber or Fibre Optical Sensor unit are positioned in the mould, treat that embedding part is positioned at the central axis position of mould; In encapsulating material, press 100: 1～100: 5 mass ratio of encapsulating material and silane coupling agent and add silane coupling agent, stir that the back adds hardening agent or/and crosslinking chemical, catalyzer are injected into curing molding in the mould after stirring once more, promptly.
In this embedding method, use silane coupling agent that adhesive layer and encapsulating material are carried out pre-service: treating that embedding optical fiber surface evenly applies the higher tackifier of cohesive strength, and it is immersed in the silane coupling agent, can impel tackifier and treat that embedding optical fiber is bonding more closely; Use polymkeric substance such as silicon rubber, silica gel or polyurethane as encapsulating material, add silane coupling agent therein, can improve mechanical properties such as the dried hygrometric state bending strength of encapsulating material, compressive strength, shear resistance, and owing to stir, add that molecule passes through diffusion and migration, the coupling agent molecule that is positioned at the bonding interface place in the silicon rubber also can with the tackifier effect, play and strengthen the purpose that encapsulating material and optical fiber or Fibre Optical Sensor unit bond.
Contain two kinds of different reactive groups in the silane coupled agent molecule that is adopted, be used for coupling organic polymer and inorganic material, strengthen its cohesiveness.Because adhesive layer and encapsulating material all use coupling agent to carry out pre-service, bonding interface place coupling agent molecule is assembled more.The hydroxyl generation hydrolysis condensation reaction of the group of silane coupled agent molecule one end and surface of pressure-sensitive adhesive, simultaneously with the polar group of surface of pressure-sensitive adhesive with hydrogen bond and chemical bonded refractory altogether, the also condensation more mutually of silanol base that generates, generate the extraordinary (Si-O-Si-) key of stability, the reactive group of the silane coupled agent molecule other end then participates in the cross-linking and curing reaction of encapsulating materials such as silicon rubber, so silane coupling agent can form bridged bond on bonding interface, play the effect that strengthens viscous force.Become more coarse through the pretreated adhesive layer of silane coupling agent surface, also help to bond with encapsulating material behind the coupling agent generation hydrolysis condensation reaction.Adhesive layer not only can serve as fibre coating at this, and can increase the contact area with encapsulating material.Through above processing, after optical fiber or Fibre Optical Sensor unit were embedded in the encapsulating material, because coupling agent plays one's part to the full, the viscosity between optical fiber and the encapsulating material was strengthened greatly.
The present invention can strengthen the cohesiveness between optical fiber and the encapsulating material effectively, reduce the slippage phenomenon that may occur between the two, realize (as: strain etc.) to be measured harmless transmission between encapsulating material and sensing unit, make sensing unit perception size to be measured exactly.This method is easy to implement, it is well with the good mechanical characteristic of polymeric materials such as silicon rubber, polyurethane, good ageing resistance, thermal expansivity is low, the wide characteristic of operating temperature range and optical fiber are outstanding communicates by letter and sensing characteristics combines, and has helped expanding the range of application of optical fiber and Fibre Optical Sensor.
The inventor is encapsulating material with silicon rubber, embedding structure after solidifying is carried out the cohesive force test: silicon rubber generation deformation influences test result when preventing in the test stretching optical fiber, silicon rubber after the curing still places mould, directly die hard is fixed on the optical table, axis direction along cylindrical die stretches to optical fiber, the length that record stretches when occurring obviously peeling off phenomenon between optical fiber and the encapsulating material can draw the fiber lengths relative variation.Optical fiber tensile elongation relative variation is 1.4 * 10 when only encapsulating with silicon rubber
4μ ε, optical fiber soaked coupling agent and during the uncoated adhesive layer optical fiber tensile elongation relative variation be 2.25 * 10
4μ ε, and the optical fiber tensile elongation relative variation of gained is 3.15 * 10 when taking optimal case of the present invention
4μ ε, test result shows that this invention has greatly improved the cohesive force between optical fiber and the encapsulating material silicon rubber.
The present invention can significantly improve optical fiber and the silicon rubber that buries, polyurethane or other is than the cohesive force between the encapsulating materials such as elasticity better polymerization thing; help the accurate perception of optical fiber and bury size to be measured in the material; and can provide protection effectively to optical fiber; and make the influence of being avoided the abrupt temp field by the optical fiber of heeling-in; therefore the utmost point has promotional value, and has a extensive future.Expected application as: based on the composite material intelligentization of optical fiber sensing technology; Transmission Fibers in the gentle material, Fibre Optical Sensor (comprising fiber-optic grating sensor) embedding; In engineering, experiment, exposed optical fiber is carried out conveniently embeddingly, effectively protect optical fiber not to be subjected to the influence of extraneous rugged surroundings, increase the service life etc.
Description of drawings
Fig. 1 is the structural representation of the embedding structure of optical fiber of the present invention.
Embodiment
Embodiment one:
Evenly apply modified acrylic ester adhesion agent on the overlay surface for the treatment of embedding optical fiber, just solidify fully after one minute, bondline thickness is about 0.5mm, with the optical fiber surface good bond, also is the surface area that has increased optical fiber with the bonding of silicon rubber.
After tackifier solidifies fully, will treat that embedding fiber section is immersed in the silane coupling A-151 (vinyltriethoxysilane), and soak to take out after 5～10 minutes and dry; Press silicon rubber in silicon rubber: the mass ratio of coupling agent=100: 1 adds coupling agent A-151 (vinyltriethoxysilane), and the back that stirs is according to silicon rubber: the mass ratio of hardening agent=50: 1 adds hardening agent, stirs once more; Next optical fiber being placed diameter is that the cylindrical die of 1cm positions, and treats that embedding part is positioned at the central axis position of mould; Carry out the can of silicon rubber at last, treat that silicon rubber solidifies after, promptly.
The embedding structure of gained as shown in Figure 1,1 for silastic-layer (being encapsulating material layer), 2 be adhesive layer, 3 is optical fiber or Fibre Optical Sensor unit, the stain 4 in silastic-layer 1 and the adhesive layer 2 is represented the coupling agent molecule that is distributed in wherein.The thickness of adhesive layer 2 is 0.5mm, and the thickness of silastic-layer 1 is 1cm.
Embodiment two:
Mix multi-purpose adhesive (principal ingredient is an epoxy resin) in the surperficial evenly coating of the overlay for the treatment of embedding optical fiber, just solidify fully after ten minutes, bondline thickness is about 0.3mm, with the optical fiber surface good bond, also is the surface area that has increased optical fiber with the bonding of silicon rubber.
After tackifier solidifies fully, will treat that embedding fiber section is immersed in silane coupling agent N-(β-aminoethyl-)-Y-aminopropyl triethoxysilane, and soak fully back taking-up and dry stand-by; Press silicon rubber in silicon rubber: the mass ratio of coupling agent=100: 2 adds coupling agent N-(β-aminoethyl-)-Y-aminopropyl triethoxysilane, stir the back according to silicon rubber: the mass ratio of hardening agent=100: 1 adds hardening agent in the silicon rubber to, stirs once more; Next place cylindrical die to position optical fiber, treat that embedding part is positioned at the central axis position of mould; Carry out the can of silicon rubber at last, treat that silicon rubber solidifies after, promptly.
Embodiment three:
Evenly the coating principal ingredient is the glass cement of acrylate on the overlay surface for the treatment of embedding optical fiber, just solidifies fully after five minutes, and bondline thickness is about 0.8mm, with the optical fiber surface good bond, also is the surface area that has increased optical fiber with the bonding of silicon rubber.
After tackifier solidifies fully, will treat that embedding fiber section is immersed in the silane resin acceptor kh-550 (gamma-aminopropyl-triethoxy-silane), and soak fully back taking-up and dry stand-by; Press silicon rubber in silicon rubber: the mass ratio of coupling agent=100: 5 adds coupling agent KH-550 (gamma-aminopropyl-triethoxy-silane), and the back that stirs is according to silicon rubber: the mass ratio of hardening agent=75: 1 adds hardening agent, stirs once more; Next place cylindrical die to position optical fiber, treat that embedding part is positioned at the central axis position of mould; Carry out the can of silicon rubber at last, treat that silicon rubber solidifies after, promptly.
Embodiment four:
Evenly the coating principal ingredient is the glass cement of acrylic acid ester on the overlay surface for the treatment of embedding optical fiber, just solidifies fully after five minutes, and bondline thickness is about 0.8mm, with the optical fiber surface good bond, also is the surface area that has increased optical fiber with the bonding of silica gel.
After tackifier solidifies fully, will treat that embedding fiber section is immersed in silane coupling agent KH-560[γ-(2,3-epoxy third oxygen) propyl trimethoxy silicon] in, soak fully back taking-up and dry stand-by; Press silica gel in silica gel: the mass ratio of coupling agent=100: 1 adds coupling agent KH-560[γ-(2,3-epoxy third oxygen) propyl trimethoxy silicon], the back that stirs is according to silica gel: the mass ratio of hardening agent=100: 1 adds hardening agent, stirs once more; Next place cylindrical die to position optical fiber, treat that embedding part is positioned at the central axis position of mould; Carry out the can of silica gel at last, treat that silica gel solidifies after, promptly.
Embodiment five:
Evenly the coating principal ingredient is the mixing multi-purpose adhesive of epoxy resin on the overlay surface for the treatment of embedding optical fiber, just solidifies fully after ten minutes, and bondline thickness is about 0.5mm, with the optical fiber surface good bond, also is the surface area that has increased optical fiber with the bonding of polyurethane.
After tackifier solidifies fully, will treat that embedding fiber section is immersed in the silane resin acceptor kh-550 (gamma-aminopropyl-triethoxy-silane), and soak fully back taking-up and dry stand-by; Press polyurethane in polyurethane: the mass ratio of coupling agent=100: 1 adds coupling agent KH-550 (gamma-aminopropyl-triethoxy-silane), add crosslinking chemical and catalyzer according to the mass ratio of 100: 5 and 100: 0.25 respectively again after stirring, stir once more; Next place cylindrical die to position optical fiber, treat that embedding part is positioned at the central axis position of mould; Carry out the can of polyurethane at last, treat that polyurethane solidifies after, promptly.
Though describe the present invention in detail with reference to the foregoing description, but should be appreciated that the present invention is not limited to the disclosed embodiments, technician for this professional domain, can replace its material and chemical reagent, this invention is intended to contain the interior various combinations of spirit and scope of appended claims.
Claims (10)
1, a kind of embedding structure of optical fiber that strengthens optical fiber and encapsulating material cohesive force, it is characterized in that: adhesive layer is arranged at optical fiber or Fibre Optical Sensor unit overlay surface applied, be encapsulating material layer outside adhesive layer, be doped with silane coupling agent in adhesive layer and the encapsulating material layer.
2, the embedding structure of optical fiber according to claim 1 is characterized in that: described encapsulating material be can with the polymkeric substance of coupling agent generation coupling reaction.
3, the embedding structure of optical fiber according to claim 2 is characterized in that: described encapsulating material is silicon rubber, polyurethane, silica gel or teflon.
4, the embedding structure of optical fiber according to claim 1 is characterized in that: described tackifier is that modified acrylic ester adhesion agent, principal ingredient are the mixing multi-purpose adhesive of epoxy resin, the super glue of glass or its analog that principal ingredient is the acrylic acid ester.
5, the embedding structure of optical fiber according to claim 1 is characterized in that: described silane coupled agent molecule has two reactive groups that can be used for coupling organic polymer and inorganic material.
6, the embedding structure of optical fiber according to claim 5, it is characterized in that: described silane coupling agent is vinyltriethoxysilane, N-(β-aminoethyl-)-Y-aminopropyl triethoxysilane, γ-(2,3-epoxy third oxygen) propyl trimethoxy silicon or gamma-aminopropyl-triethoxy-silane.
7, according to the embedding structure of the optical fiber of stating of claim 1, it is characterized in that: the thickness of described adhesive layer is 0.3～0.8mm, and the thickness of described encapsulating material layer is 1cm.
8, a kind of embedding method as the embedding structure of each described optical fiber in the claim 1 to 7, it is characterized in that: treating evenly adhesive coating of embedding optical fiber or Fibre Optical Sensor unit overlay surface, treat after adhesive layer solidifies it to be immersed in the silane coupling agent, then the optical fiber taking-up is hung at normal temperatures until coupling agent hydrolysis drying; Again optical fiber or Fibre Optical Sensor unit are positioned in the mould, treat that embedding part is positioned at the central axis position of mould; In encapsulating material, be that 100: 1～100: 5 ratio is added silane coupling agent in the mass ratio of encapsulating material and silane coupling agent, stir that the back adds hardening agent or/and crosslinking chemical, catalyzer are injected into curing molding in the mould after stirring once more.
9, embedding method according to claim 8, it is characterized in that: when described encapsulating material is silicon rubber or silica gel, in silicon rubber or silica gel, be that 100: 1～100: 2 ratio is added silane coupling agent in the mass ratio of silicon rubber or silica gel and silane coupling agent.
10, embedding method according to claim 8 is characterized in that: described surface applied has the optical fiber of tackifier or Fibre Optical Sensor unit to soak in silane coupling agent 5～10 minutes.
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| CN 200610037372 CN1916681A (en) | 2006-08-30 | 2006-08-30 | Embedment structure of optical fiber and embedment method for enhancing cohesive force between optical fiber and packaging material |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102981302A (en) * | 2012-11-30 | 2013-03-20 | 京东方科技集团股份有限公司 | Manufacture method of display panel and display panel |
| CN103487165A (en) * | 2013-09-22 | 2014-01-01 | 中北大学 | Testing system for internal temperature distribution in process of fusion cast forming of explosives |
| CN104309644A (en) * | 2014-10-13 | 2015-01-28 | 深圳市科安达轨道交通技术有限公司 | Optical fiber grating sensor-based axle counter |
| CN105179406A (en) * | 2015-08-20 | 2015-12-23 | 哈尔滨工业大学 | Glue sealing method and device for high-temperature optical fiber sensor |
| CN105974544A (en) * | 2016-07-25 | 2016-09-28 | 长飞光纤光缆股份有限公司 | Sensing-communication composite optical cable |
| CN107687817A (en) * | 2017-07-20 | 2018-02-13 | 北京航天控制仪器研究所 | One kind miniaturization flexible optical fibre grating strain transducer |
| CN109186583A (en) * | 2018-10-31 | 2019-01-11 | 中国船舶重工集团公司第七0七研究所 | A kind of tail optical fiber glue-applying technique method improving optical fibre gyro ring performance |
| CN115267986A (en) * | 2022-08-15 | 2022-11-01 | 武汉锐科光纤激光技术股份有限公司 | Packaging structure and optical fiber coupler |
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2006
- 2006-08-30 CN CN 200610037372 patent/CN1916681A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102981302A (en) * | 2012-11-30 | 2013-03-20 | 京东方科技集团股份有限公司 | Manufacture method of display panel and display panel |
| CN102981302B (en) * | 2012-11-30 | 2015-07-29 | 京东方科技集团股份有限公司 | A kind of method for making of display panel and display panel |
| CN103487165A (en) * | 2013-09-22 | 2014-01-01 | 中北大学 | Testing system for internal temperature distribution in process of fusion cast forming of explosives |
| CN104309644A (en) * | 2014-10-13 | 2015-01-28 | 深圳市科安达轨道交通技术有限公司 | Optical fiber grating sensor-based axle counter |
| CN105179406A (en) * | 2015-08-20 | 2015-12-23 | 哈尔滨工业大学 | Glue sealing method and device for high-temperature optical fiber sensor |
| CN105974544A (en) * | 2016-07-25 | 2016-09-28 | 长飞光纤光缆股份有限公司 | Sensing-communication composite optical cable |
| CN107687817A (en) * | 2017-07-20 | 2018-02-13 | 北京航天控制仪器研究所 | One kind miniaturization flexible optical fibre grating strain transducer |
| CN107687817B (en) * | 2017-07-20 | 2019-11-29 | 北京航天控制仪器研究所 | A kind of miniaturization flexible optical fibre grating strain transducer |
| CN109186583A (en) * | 2018-10-31 | 2019-01-11 | 中国船舶重工集团公司第七0七研究所 | A kind of tail optical fiber glue-applying technique method improving optical fibre gyro ring performance |
| CN109186583B (en) * | 2018-10-31 | 2022-06-10 | 中国船舶重工集团公司第七0七研究所 | Tail fiber gluing process method for improving ring performance of fiber-optic gyroscope |
| CN115267986A (en) * | 2022-08-15 | 2022-11-01 | 武汉锐科光纤激光技术股份有限公司 | Packaging structure and optical fiber coupler |
| CN115267986B (en) * | 2022-08-15 | 2024-01-26 | 武汉锐科光纤激光技术股份有限公司 | Packaging structure and optical fiber coupler |
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