WO2016137348A1 - Capteur de gaz à fibre optique et procédé de fabrication d'un capteur de gaz à fibre optique - Google Patents

Capteur de gaz à fibre optique et procédé de fabrication d'un capteur de gaz à fibre optique Download PDF

Info

Publication number
WO2016137348A1
WO2016137348A1 PCT/PL2016/050003 PL2016050003W WO2016137348A1 WO 2016137348 A1 WO2016137348 A1 WO 2016137348A1 PL 2016050003 W PL2016050003 W PL 2016050003W WO 2016137348 A1 WO2016137348 A1 WO 2016137348A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fibre
silica gel
coated
fibre
stripped
Prior art date
Application number
PCT/PL2016/050003
Other languages
English (en)
Other versions
WO2016137348A4 (fr
Inventor
Marek NAPIERAŁA
Tomasz NASIŁOWSKI
Michał SZYMAŃSKI
Michał MURAWSKI
Tomasz STAŃCZYK
Karol WYSOKIŃSKI
Małgorzata BROCZKOWSKA
Agnieszka KOŁAKOWSKA
Original Assignee
Inphotech Sp. Z O. O.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inphotech Sp. Z O. O. filed Critical Inphotech Sp. Z O. O.
Publication of WO2016137348A1 publication Critical patent/WO2016137348A1/fr
Publication of WO2016137348A4 publication Critical patent/WO2016137348A4/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N2021/7706—Reagent provision
    • G01N2021/7709—Distributed reagent, e.g. over length of guide
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N2021/7706—Reagent provision
    • G01N2021/772—Tip coated light guide
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N2021/7706—Reagent provision
    • G01N2021/7726—Porous glass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/7769—Measurement method of reaction-produced change in sensor
    • G01N2021/7773—Reflection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/7769—Measurement method of reaction-produced change in sensor
    • G01N2021/7783—Transmission, loss

Definitions

  • a fibre optic gas sensor and manufacturing method of fibre optic gas sensor This invention relates to the fibre optic gas sensor used to assess the content of C0 2 , N0 2 , S0 2 , NH 3 , H 2 0 and other gases in the air which is based on the phenomenon of colour change of the pH indicators and to the manufacturing method of fibre optic gas sensor.
  • Patent US5714121 presents optical carbon dioxide sensor and its manufacturing method.
  • the sensor is designed for detection of C0 2 in the liquid sample and consists of a cap/capsule slid over the end of optical fibre with fluorescent indicator particles which react with C0 2 .
  • the capsule is made of silicone.
  • Patent US5408999 relates to the fibre optic sensor to measure parameters of liquids.
  • the solution disclosed is intended for analysis of pH and concentration of blood gases (including oxygen and C0 2 ).
  • the invention works on the basis of the reactive coating or layer applied on the surface of optical fibre. Change in propagation of the light which results from the reaction of reactive layer with environment allows to assess pH/ concentration.
  • Patent US4842783 presents manufacturing method of fibre optic chemical sensor which consists in applying a photocrystalline gel, preferably a polymeric one, on the waveguide part which increases its volume while crosslinking. Gel is saturated with a dye which changes propagation of light and may be used to assess pH and concentration of oxygen, C0 2 or other gases.
  • Patent US5280548 relates also to fibre optic sensor to analyse C0 2 , which may be used to assess oxygen concentration or pH.
  • DEI 9900019 - invention relates to the fibre optic sensor to assess pH, C0 2 and other physicochemical parameters.
  • the optical fibre is covered with a membrane in which there is a substance (indicator) changing its absorption properties with changes in environment.
  • the senor consists of at least one optical fibre coated with silica gel layer which changes its colour with the change in the concentration of gases, such as C0 2 , N0 2 , S0 2 , NH 3 and H 2 0.
  • Silica gel layer is applied on the jacket-free optical fibre surface and contains at least one substance sensitive to changes of pH in the optical fibre working environment; preferably the substance should involve methyl orange, thymol blue or phenolphthalein or other substance sensitive to the change of pH in the range of 0 to 14.
  • the silica gel layer is applied on the surface of optical fibre tapered and/or etched and/or bent or on the optical fibre's face.
  • an optical fibre is a single-mode, multi-mode or undoped fibre (made of pure silica).
  • Other manufacturing method involves also microstructural fibres.
  • the fibres with silica gel have low attenuation.
  • silica gels in which there is at least one indicator are made in two ways: with the use of inorganic silicates, e.g. sodium silicate or with the use of organic silanes.
  • the manufacturing method of the gas sensor consists in the fact that optical fibre, preferably a single-mode one, is stripped of a part of the coating, visible section of optical fibre is tapered, etched or cut and afterwards treated surface of the optical fibre is placed preferably by putting treated optical fibre section in the silica gel solution.
  • stripped optical fibre is tapered so thatthe fibre is heated and stretched with the use of dedicated fusion splicer. It is preferable if thetaper is made with the use of GPX-3400 fusion splicer, maintaining the parameters of taper performed on typical single-mode SMF-28 optical fibre in the following form:
  • - taper diameter preferable not smaller than 5 ⁇
  • silica gel solution is obtained in such a way that diluted sodium silicate solution is added drop by drop to the acidic aqueous solution until obtaining assumed pH in the range from 1 to 9. Afterwards, after a certain amount of time of at least 10 sec, solution prepared in such a way gels which occurs faster if higher pH has been reached. Then gel is washed and dried at room conditions. Alternatively, this reaction may be conducted in the opposite way, i.e. a silicate may be added drop by drop to the acid, but the reaction occurs rapidly and obtained silica may not be suitable for sensors.
  • Taper area is coated with silica gel containing 10-60% w/w of ethanol solution consisting of 0.1% w/w of thymol blue and 20-70% w/w of triethoxymethylsilane with addition of 0-20% w/w of tetraethoxysilane and 5-30% w/w of water along with 1-10% w/w of aqueous solution of tetramethylammonium hydroxide, which form a homogeneous mixture.
  • Silica gel is placed on the optical fibre surface in an immersion process, after which one part of taper is located above the other and after 1 minute this process should preferably be repeated at least 3 times and then taper is dried for at least 24 hours.
  • silanes in amount of at least 20%, which contains in particular methyl or octyl group, resulting in silica gels with different parameters and no need of washing which in turn simplifies the manufacturing process.
  • ethoxysilanes with additional alkyl groups allows to obtain different level of porosity and permeability for various gases.
  • silanes preferably ethoxysilanes
  • a solvent e.g. ethyl alcohol
  • water and catalytic agent are necessary to conduct hydrolysis, whereas a solvent facilitates mixing of the ingredients which may be difficult.
  • a part of single-mode optical fibre is stripped and afterwards for at least 10 minutes it is treated with 40% hydrofluoric acid solution, maintaining the parameters of etching as:
  • - diameter of etched optical fibre preferably should amount to at least: 5 ⁇
  • - etching length is equal to at least: 0.5 cm.
  • the etched fragment is immobilised, preferably ona platform, so that it will not move during coating and sensor work and thenit is coated with silica gel.
  • Silica gel which covers the etched taper surface is in a form of ethanol solution containing 0.1% phenol red and thymol blue in 10-60% w/w with addition of 20-70% w/w of triethoxymetylsilane, with addition of 0-20% w/w of tetraethoxysilane and 5-30% w/w of water along with 1-10% of aqueous solution of tetramethylammonium hydroxide, which form a homogeneous mixture in which etched fragment of optical fibre is immersed. After immersion, the optical fibre is pulled out from it so that one end of the etched part is above the other one and after 1 minute this activity is repeated at least 3 times and then the optical fibre is dried for at least 24 hours.
  • undoped optical fibre is stripped at length of approx. 12 cm, which in turn is coated with silica gel layer.
  • Silica gel which covers stripped optical fibre surface is in a form of ethanol solution containing 0.1% phenol red in 10-60% w/w, 20-70% w/w of triethoxymethylsilane, 0-20% w/w of tetraethoxysilane and 5-30% w/w of water with addition of 1-10% of aqueous solution of tetramethylammonium hydroxide, which form a homogeneous mixture.
  • optical fibre After a bath, optical fibre is pulled out from it so that one end is above the other one and after 1 minute this activity is repeated at least 3 times and then the optical fibre is dried for at least 24 hours. Coated section of the optical fibre is bent in such a way that a bending radius amounts to approx. 2 cm and then is immobilised.
  • Substances being pH indicators are used to create sensory layer, i.e. such which change their colour with change in pH in an appropriate range. These include i.a. the following: brilliant green, erythrosine B, crystal violet, malachite green, thymol blue, methyl yellow, dinitrophenol, bromophenol blue, anthocyanidins, anthoxanthins, anthocyanins, Congo red, methyl orange, bromocresol green, methyl red, methyl violet, resazurin, nitrazine, aurine, litmus, chinolidine red, nitrophenol, chlorophenol red, bromocresol purple, bromocresol violet, bromothymol blue, phenol red, toluidine red, naphtolophtaleine, cresol red, cresolophtaleine, orange yellow, phenolphthalein, thymolphthalein, alizarin yellow, indigo carmine, tropeoline, polyphenols and other similar compounds.
  • the invention operates based on the phenomenon consisting in the fact that changes in gas concentration may be assessed when light of a wavelength, at which the various forms of the active layer (in the presence of test gas and not) have different absorption, is introduced to the optical fibre.
  • pH indicators in pure form usually do not exhibit change of colour in presence of previously listed gases. This may be a result of i.a. intermolecular interactions between adjacent molecules of an indicator which may alter their electron properties and thus also the absorption spectrum.
  • the second cause may include diffusion limitations, because gases may not be able to pass through relatively thickly packed structures of indicative substances. Therefore, it is necessary to dissolve the indicator in the porous material.
  • Silica gels in a form of e.g. organically modified silica are an ideal candidate for this type of application. They are made of organic silicate derivatives, in which dyes being pH indicators may be dissolved. As a result of hydrolysis, silicates transform from liquid state to a solid state and when solvents are evaporated, they become very porous.
  • Porous silica may be obtained if e.g. tetraethoxysilane, triethoxymetylsilane, triethoxyoctylosilane, silicates or other similar compounds with silicon are used as reagents. These dyes may also be dissolved in a number of polymeric substances, such as ethyl cellulose, however they do not exhibit so rapid reaction time.
  • the light is introduced to silica gel layer containing pH indicators by means of optical fibres with the use of one of the following methods:
  • the taper made of a single-mode, multi-mode or undoped optical fibre with the active layer, whereas microstmctural optical fibre may also be used.
  • microstmctural optical fibre may also be used.
  • microstmctural optical fibre may also be used.
  • the assessment may take place by evaluating fibre transmission or by examining changes in intensity of light reflected from the fibre's face opposite to the one, through which the light is introduced which requires the need to use fibre optic coupler.
  • the assessment may be performed by receiving the light from the optical fibre with faceadjacent to another optical fibre, which may be done if they are accurately set against each other.
  • this assessment may also be conducted by means of reflection, measuring the intensity of light reflected from the fibre face coated with the active layer.
  • sensing component of the sensor contains optical fibre coated with a layer made of porous silica or organically modified silica, hereinafter sensor layer (described below),
  • pH indicator such as: phenol red, methyl red, bromothymol blue, thymol blue or other similar substances, preferably substances which change their colour with pH in the range from 0 to 14,
  • sensor layer is placed on a tapered, etched or bent, undoped or multi-mode optical fibre or on the optical fibre face, whereas microstructural optical fibre may also preferably be used.
  • An optical fibre being at the same time a sensing component of the sensor must primarily be able to provide the signal to the sensor layer containing a dye and afterwards to receive it.
  • various measuring systems may be constructed.
  • Taper made of the single-mode optical fibre coated with silica gel layer with addition of phenol red is immobilised so that it cannot move during the assessment. Afterwards, light with wavelength of approx. 530 nm is introduced to one end of the optical fibre. The amount of light transmitted by the optical fibre is measured with the use of detector adapted to operate at the above-mentioned wavelength. The rise of carbon dioxide concentration increases the transmission. Sensor calibration is preferably performed in a chamber with the use of a reference gas sensor.
  • a single-mode optical fibre with etched section coated with silica gel layer with addition of thymol blue is immobilised so that it cannot move during an assessment. Afterwards, light with wavelength of approx. 635 nm is introduced to one end of the optical fibre. The amount of light transmitted by the optical fibre is measured with the use of detector adapted to operate at the above-mentioned wavelength. The rise of carbon dioxide concentration increases the transmission. Sensor calibration is preferably performed in a chamber with the use of a reference gas sensor.
  • Undoped bent optical fibre coated with silica gel layer with addition of cresol red is immobilised so that it cannot move during assessment. Afterwards, light with wavelength of approx. 530 nm is introduced to one end of the optical fibre. The amount of light transmitted by the optical fibre is measured with the use of detector adapted to operate at the above- mentioned wavelength. The rise of carbon dioxide concentration increases the transmission. Sensor calibration is preferably performed in a chamber with the use of reference gas sensor.
  • a single-mode optical fibre coated with silica gel layer with addition of thymol blue is set opposite to an undoped fibre and immobilised so that they cannot move during an assessment. Afterwards, light with wavelength of approx. 635 nm is introduced to an uncoated end of a single-mode optical fibre. The amount of light transmitted at the free end of an undoped optical fibre is measured with the use of detector adapted to operate at the above-mentioned wavelength. The rise of carbon dioxide concentration increases the transmission. Sensor calibration is preferably performed in a chamber with the use of a reference gas sensor.
  • a light-emitting diode, gas laser, solid- state laser, etc. are the preferable source of the signal.
  • Signal detection is preferably carried out with a detector adjusted to a wavelength of the light source. It should be a semiconductor detector or a spectrum analyser.
  • the senor may be used to carry out the assessment away from the light source; therefore, there are no electrical signals at the assessment site (optical fibre as a passive component which does not generate sparks). There is a possibility of placing several sensors in one fibre and this expands measuring capabilities of the systems.
  • the device will allow to assess the following ambient properties:
  • the senor consists of an optical fibre coated with silica gel layer which changes its colour with the change of the concentration of gases, such as C0 2 , N0 2 , S0 2 , NH 3 and H 2 0.
  • Silica gel layer is applied on the stripped optical fibre surface and contains a substance sensitive to changes of pH in the optical fibre working environment; the substance is thymol blue sensitive to the change in pH in the range of 8.0 to 9.6.
  • Silica gel layer is placed on the surface of tapered optical fibre.
  • an optical fibre is a single-mode fibre and has low attenuation.
  • Fibre optic gas sensor is manufactured in such a way that single- mode optical fibre is stripped and tapered with the use of a dedicated fusion splicer by heating and extending it.
  • the taper is made with the use of GPX- 3400 fusion splicer.
  • the parameters of the taper made of a typical single- mode SMF-28 optical fibre are as follows:
  • Taper area is coated with a silica gel containing 23% w/w of ethanol solution consisting of 0.1% w/w of thymol blue and 52% w/w of triethoxymetylsilane with addition of 7% w/w of tetraethoxysilane and 15% w/w of water along with 3% w/w of aqueous solution of tetramethylammonium hydroxide, which form a homogeneous mixture.
  • Silica gel is placed on the optical fibre surface in an immersion process, after which one part of the taper is located above the other and after 1 minute this process should preferably be repeated at least 3 times and then the taper is dried for at least 24 hours.
  • sensor manufactured in such a way may be used to detect C0 2 , N0 2 , S0 2 and H 2 0. Concentration of the selected gas may be measured with the use of reference sensors.
  • the senor consists of an optical fibre coated with a silica gel layer which changes its colour with the change of the concentration of gases, such as C0 2 , N0 2 , S0 2 , NH 3 and H 2 0.
  • Silica gel layer is applied on the stripped optical fibre surface which was etched with hydrofluoric acid and contains a substance sensitive to changes of pH
  • Silica gel layer is placed on the surface of tapered optical fibre after it was etched, whereas an optical fibre is a single-mode fibre and has low attenuation.
  • Fibre optic gas sensor is manufactured in such a way that single-mode optical fibre is stripped and its section is treated with 40% hydrofluoric acid solution for 57 minutes, maintaining the following etching parameters:
  • the etched fragment is immobilised on the platform so that it will not move while coating and sensor work and then it is coated with silica gel.
  • Silica gel coating at the etched surface of the taper is produced of 325 0.1% w/w of ethanol solution consisting of 24% w/w of phenol red which is added to 55% w/w of triethoxymethylsilane with addition of 3% w/w of tetraethoxysilane and 15% w/w of water in turn with addition of 3% w/w of aqueous solution of tetramethylammonium hydroxide, which form a homogeneous mixture, in which etched part of the optical fibre is immersed. After immersion, optical fibre is pulled out from the solution so that one end of the etched part is above the other one and after 1 minute this activity is repeated for 3 times and then the optical fibre is dried for 24 hours.
  • a sensor manufactured in such a way may be used to detect C0 2 , N0 2 , S0 2 and H 2 0. Concentration of the selected gas may be measured with the use of reference sensors.
  • the senor consists of an optical fibre coated with silica gel layer which changes its colour with the change of the concentration of gases, such as C0 2 , N0 2 , S0 2 , NH 3 and H 2 0.
  • Silica gel layer is applied on the stripped optical fibre surface which contains a substance sensitive to changes of pH in the optical fibre working environment; the substance was phenol red sensitive to change of pH in the range of 6.8 to 8.2.
  • Silica gel layer is placed on the surface of optical fibre, whereas an optical fibre is a single-mode fibre and has low attenuation.
  • Fibre optic gas sensor is manufactured in such a way that a single- mode fibre is stripped and its section is coated with silica gel layer, made of ethanol solution containing 0.1% of phenol red in 20% w/w, 61% w/w of triethoxymethylsilane as well as 3% w/w of tetraethoxysilane and 14% w/w of water in turn with addition of 2% w/w of aqueous solution of tetramethylammonium hydroxide, which are mixed until a homogeneous mixture is formed.
  • silica gel layer made of ethanol solution containing 0.1% of phenol red in 20% w/w, 61% w/w of triethoxymethylsilane as well as 3% w/w of tetraethoxysilane and 14% w/w of water in turn with addition of 2% w/w of aqueous solution of tetramethylammonium hydroxide, which are mixed until a homogeneous mixture is
  • optical fibre After immersion, optical fibre is pulled out from the solution so that one end is above the other one and after 1 minute this activity is repeated at least 3 times and then the optical fibre is dried for at least 24 hours. Coated section of the optical fibre is bent in such a way that a bending radius amounts to approx. 2 cm and is immobilised.
  • a sensor manufactured in such a way may be used to detect C0 2 , N0 2 , S0 2 and H 2 0. Concentration of the selected gas may be measured with the use of reference sensors.
  • the senor consists of an optical fibre coated with silica gel layer which changes its colour with the change of the concentration of gases, such as C0 2 , N0 2 , S0 2 , NH 3 and H 2 0.
  • Silica gel layer is applied on the optical fibre face and it contains a substance sensitive to changes of pH of the optical fibre working environment; the substance was thymol blue sensitive to the change of pH in the range of 8.0 to 9.6.
  • Silica gel layer is placed on the surface of optical fibre, whereas an optical fibre is a single-mode fibre and has low attenuation.
  • Fibre optic gas sensor is manufactured in such a way that a single-mode optical fibre is stripped and cut, whereas in this section it is coated

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

L'invention porte sur un capteur de gaz à fibre optique et sur son procédé de fabrication. Le capteur de gaz à fibre optique est constitué d'au moins une fibre optique revêtue d'une couche de gel de silice qui change de couleur avec un changement de la concentration des gaz, tels que le dioxyde de carbone (CO2), le dioxyde d'azote (NO2), le dioxyde de soufre (SO2), l'ammoniac (NH3) et l'eau (H2O), la couche de gel de silice étant appliquée sur une surface de fibre optique dénudée et contenant au moins une substance indicatrice, telle que le rouge de phénol ou le bleu de thymol, sensible à un changement du pH dans l'environnement de travail de la fibre optique dans une plage allant de 0 à 14 et la substance indicatrice étant placée sur une surface de la fibre optique traitée préparée dans le procédé de taillage en pointe, de gravure, de pliage ou de coupe. Le procédé de fabrication du capteur de gaz à fibre optique consiste à dénuder une fibre optique, de préférence une fibre optique à mode unique, à traiter une section visible de la fibre optique et à la recouvrir avec une substance chimiquement active, la surface de la fibre optique étant effilée, gravée ou découpée et le gel de silice étant la substance chimiquement active placée sur la surface de la section traitée de la fibre optique dans un procédé d'immersion.
PCT/PL2016/050003 2015-02-28 2016-02-26 Capteur de gaz à fibre optique et procédé de fabrication d'un capteur de gaz à fibre optique WO2016137348A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL411431A PL226779B1 (pl) 2015-02-28 2015-02-28 Swiatłowodowy czujnik gazów oraz sposób wytwarzania swiatłowodowego czujnika gazów
PLP.411431 2015-02-28

Publications (2)

Publication Number Publication Date
WO2016137348A1 true WO2016137348A1 (fr) 2016-09-01
WO2016137348A4 WO2016137348A4 (fr) 2016-10-27

Family

ID=55697436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2016/050003 WO2016137348A1 (fr) 2015-02-28 2016-02-26 Capteur de gaz à fibre optique et procédé de fabrication d'un capteur de gaz à fibre optique

Country Status (2)

Country Link
PL (1) PL226779B1 (fr)
WO (1) WO2016137348A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842783A (en) 1987-09-03 1989-06-27 Cordis Corporation Method of producing fiber optic chemical sensors incorporating photocrosslinked polymer gels
US5280548A (en) 1993-03-11 1994-01-18 Boc Health Care, Inc. Emission based fiber optic sensors for pH and carbon dioxide analysis
US5408999A (en) 1992-10-23 1995-04-25 Optex Biomedical, Inc. Fiber-optic probe for the measurement of fluid parameters
US5714121A (en) 1995-09-28 1998-02-03 Optical Sensors Incorporated Optical carbon dioxide sensor, and associated methods of manufacture
DE19900019A1 (de) 1999-01-02 2000-08-10 Bosch Gmbh Robert Faseroptischer Sensor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4842783A (en) 1987-09-03 1989-06-27 Cordis Corporation Method of producing fiber optic chemical sensors incorporating photocrosslinked polymer gels
US5408999A (en) 1992-10-23 1995-04-25 Optex Biomedical, Inc. Fiber-optic probe for the measurement of fluid parameters
US5280548A (en) 1993-03-11 1994-01-18 Boc Health Care, Inc. Emission based fiber optic sensors for pH and carbon dioxide analysis
US5714121A (en) 1995-09-28 1998-02-03 Optical Sensors Incorporated Optical carbon dioxide sensor, and associated methods of manufacture
DE19900019A1 (de) 1999-01-02 2000-08-10 Bosch Gmbh Robert Faseroptischer Sensor

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
CAO W ET AL: "Optical fiber-based evanescent ammonia sensor", SENSORS AND ACTUATORS B: CHEMICAL: INTERNATIONAL JOURNAL DEVOTED TO RESEARCH AND DEVELOPMENT OF PHYSICAL AND CHEMICAL TRANSDUCERS, ELSEVIER BV, NL, vol. 110, no. 2, 2 March 2005 (2005-03-02), pages 252 - 259, XP027810773, ISSN: 0925-4005, [retrieved on 20051014] *
KAROL WYSOKINSKI ET AL: "Study on the Sensing Coating of the Optical Fibre CO2 Sensor", SENSORS, vol. 15, no. 12, 17 December 2015 (2015-12-17), pages 31888 - 31903, XP055283965, DOI: 10.3390/s151229890 *
LI RONG PENG ET AL: "Ammonia Detection by Dye Immobilized Microstructured Optical Fiber", ADVANCED MATERIALS RESEARCH, vol. 255-260, 31 May 2011 (2011-05-31), pages 2131 - 2135, XP055283966, DOI: 10.4028/www.scientific.net/AMR.255-260.2131 *
SEGAWA H ET AL: "Sensitivity of fiber-optic carbon dioxide sensors utilizing indicator dye", SENSORS AND ACTUATORS B: CHEMICAL: INTERNATIONAL JOURNAL DEVOTED TO RESEARCH AND DEVELOPMENT OF PHYSICAL AND CHEMICAL TRANSDUCERS, ELSEVIER BV, NL, vol. 94, no. 3, 2003, pages 276 - 281, XP004442287, ISSN: 0925-4005, DOI: 10.1016/S0925-4005(03)00372-1 *
TAO S ET AL: "Optical fiber ammonia sensing probes using reagent immobilized porous silica coating as transducers", SENSORS AND ACTUATORS B: CHEMICAL: INTERNATIONAL JOURNAL DEVOTED TO RESEARCH AND DEVELOPMENT OF PHYSICAL AND CHEMICAL TRANSDUCERS, ELSEVIER BV, NL, vol. 115, no. 1, 3 October 2005 (2005-10-03), pages 158 - 163, XP027971253, ISSN: 0925-4005, [retrieved on 20060523] *

Also Published As

Publication number Publication date
WO2016137348A4 (fr) 2016-10-27
PL411431A1 (pl) 2016-08-29
PL226779B1 (pl) 2017-09-29

Similar Documents

Publication Publication Date Title
US5308771A (en) Chemical sensors
Ding et al. Fibre optic pH sensors prepared by sol-gel immobilisation technique
US4666672A (en) Optrode for sensing hydrocarbons
US5640470A (en) Fiber-optic detectors with terpolymeric analyte-permeable matrix coating
Zhao et al. A low cost fiber-optic humidity sensor based on silica sol–gel film
US5081041A (en) Ionic component sensor and method for making and using same
Klein et al. Integrated-optic ammonia sensor
Weigl et al. New hydrophobic materials for optical carbon dioxide sensors based on ion pairing
Liu et al. High sensitivity optical fiber sensors for simultaneous measurement of methanol and ethanol
Çaglar et al. Ammonia-sensitive fibre optic probe utilising an immobilised spectrophotometric indicator
Segawa et al. Sensitivity of fiber-optic carbon dioxide sensors utilizing indicator dye
EP0481740A2 (fr) Microcapteur de PH à fibre optique et procédé de fabrication
JPH11512521A (ja) ｐＨおよびｐＣＯ▲下２▼についての同時二重励起／一重発光蛍光感知方法
US20150147231A1 (en) Optochemical sensor
Liu et al. Multi-parameter optical fiber sensing of gaseous ammonia and carbon dioxide
Khalilian et al. Highly sensitive and wide-dynamic-range side-polished fiber-optic taste sensor
US6521185B1 (en) Fluorescent probes based on the affinity of a polymer matrix for an analyte of interest
Preejith et al. Total protein measurement using a fiber-optic evanescent wave-based biosensor
US4771006A (en) Optrode for sensing hydrocarbons
Scorsone et al. Fibre-optic evanescent sensing of gaseous ammonia with two forms of a new near-infrared dye in comparison to phenol red
Butler et al. Development of an extended-range fiber optic pH sensor using evanescent wave absorption of sol-gel-entrapped pH indicators
WO2016137348A1 (fr) Capteur de gaz à fibre optique et procédé de fabrication d'un capteur de gaz à fibre optique
Gouveia et al. Measurement of CO2 using refractometric fiber optic sensors
Mechery et al. Fiber optic based gas sensor with nanoporous structure for the selective detection of NO2 in air samples
Rodriguez-Rodriguez et al. Polymer optical fiber moisture sensor based on evanescent-wave scattering to measure humidity in oil-paper insulation in electrical apparatus

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16715129

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16715129

Country of ref document: EP

Kind code of ref document: A1