CN100507538C - Method for producing taste sense transducer containing polymer-carbon black - Google Patents

Method for producing taste sense transducer containing polymer-carbon black Download PDF

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Publication number
CN100507538C
CN100507538C CNB2007100676601A CN200710067660A CN100507538C CN 100507538 C CN100507538 C CN 100507538C CN B2007100676601 A CNB2007100676601 A CN B2007100676601A CN 200710067660 A CN200710067660 A CN 200710067660A CN 100507538 C CN100507538 C CN 100507538C
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carbon black
taste
spoon shape
gold electrode
electrode
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CN101021499A (en
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郭希山
童基均
王立人
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Zhejiang University ZJU
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Zhejiang University ZJU
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Abstract

A method prepares taste sensor containing polymer-black carbon. Spoon-shaped metal-arc is prepared by vacuum sputtering and chemical deposition process on base plate. Take PLA or hyper-carbon as materials of taste sensitive layer adulterated with black carbon, deposit taste sensitive layer on metal-arc by dripping directly and dry it. Coat epoxide on area outsides taste sensitive layer and air dry to get taste sensor containing polymer-black carbon. Compared to existed techniques, its merits are: Taking viscoelasticity polymer as materials of taste sensitive layer has batter stability in liquid environment. Conductibility of adulterated black carbon particles can improve sensitivity of sensor. Depositing taste sensitive layer by dripping directly has simple operation, fixed dripping quantity and good film reusability. Sensor can work under normal temperature and its bulk is small and measuring method is simple. The sensor can test and identify five basic tastes of sour, sweet, bitter, salty and fresh.

Description

A kind of preparation method who contains the taste sensor of polymer-carbon black
Technical field
The present invention relates to a kind of taste sensor, particularly a kind of preparation method who contains the taste sensor of polymer-carbon black.
Background technology
People's the sense of taste is to change film potential by physics, chemical reaction that taste bud cell on sense of taste material and the tongue is experienced film to cause, the sense of taste roughly can be divided into 5 kinds of primary tastes such as acid, sweet, bitter, salty, aquatic foods.In order to reproduce people's taste function, enlarge application places and scope, need carry out the sensor that Bionic Design realizes having " the artificial sense of taste ", i.e. taste sensor [1] to the sense of taste.Taste sensor is in the food and drink analysis, and heavy metal ion detects in the effluent sewage, and numerous areas such as the taste identification of medicine, analysis of components have a wide range of applications.Taste sensor can overcome traditional smell teacher's sense of taste fatigue problem or to experimenter's toxic and side effect, can improve traditional Biochemical Analyzer, chromatograph and spectrometer complex operation, waste time and energy, drawback such as instrument costliness, the real-time online of realizing industry fields such as food and drink, environmental protection, medicine is detected, analyzes and monitoring has great importance.
When taste sensor touched sense of taste solution to be detected, the quick layer of sensor flavor can absorb the material that is dissolved in the water, and the electrical property of sensor electrode is changed, and measures the different tastes that this change just can detect variable concentrations.Taste sensor has reproduced the mechanism and the reaction to sense of taste substance solution similar to people's taste perception mode of the membrane potential of the taste bud cell receptor that human body causes by sense of taste material, has good bionical effect and higher resolution.
At present, the researcher adopts lipid/polymeric membrane [2] or polymkeric substance [3] or chalcogenide glass (Chalcogenide glass) [4] or Prussian blue material preparation taste sensors such as [5] mostly.But above-mentioned these methods are when the preparation taste sensor, mostly there is the quick layer of flavor film forming complexity, wayward, the uniformity consistency of film is poor, the water wettability of film is poor, the quick layer of flavor problem such as inefficacys easily when being used for liquid phase environment and detecting for a long time, therefore the selectivity scope of prepared taste sensor extensively, reproducibility is relatively poor and stability is not very high.Other has the researcher to attempt adopting non-conductive polymer doping dressing agent to attempt to improve the problems referred to above, as adopt polymer poly vinyl alcohol doping preparation of cellulose taste sensor [6], but because the conduction property of polyvinyl alcohol (PVA)-cellulose complex is not good enough, therefore the taste sensor sensitivity of this method preparation is not very high, and the adhesion of the quick layer of flavor on electrode comes off inadequately and easily when being immersed in solution for a long time.
Summary of the invention
The object of the present invention is to provide a kind of preparation method who contains the taste sensor of polymer-carbon black, it chooses viscoelasticity polymkeric substance polylysin, polylactic acid as the quick layer of flavor basic material, the carbon-black doped particulate, adopt direct dripping method to deposit the quick layer preparation taste sensor of flavor on gold electrode, this taste sensor of polymer-carbon black that contains is compared with taste sensor in the past and is had higher sensitivity, good stable.
A kind of preparation method who contains the taste sensor of polymer-carbon black is included in and makes spoon shape gold electrode 2 on the substrate 1, the quick layer 3 of preparation flavor on spoon shape gold electrode, and preparation gold solder dish 4 is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 100~300 μ m, and golden film thickness is 300nm~2 μ m, and electrode length is 15~40mm;
B) polylactic acid PLLA is rendered in the chloroform solvent, the concentration of PLLA is 5~15mg/ml, and with magnetic stirring apparatus water-bath heated and stirred, temperature is 60 ℃, melts fully up to PLLA; Carbon black is rendered in the benzene, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Get a certain amount of carbon black suspension and add formation PLLA-carbon black mixed solution in the PLLA solution to, the mass percent of carbon black is 2%-12% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the PLLA-carbon black mixed solution of getting 1 μ I with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 1~5k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1 dries, and obtains to contain the taste sensor of polymer-carbon black.
A kind of preparation method who contains the taste sensor of polymer-carbon black is included in and makes spoon shape gold electrode 2 on the substrate 1, the quick layer 3 of preparation flavor on spoon shape gold electrode, and preparation gold solder dish 4 is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 100~300 μ m, and golden film thickness is 300nm~2 μ m, and electrode length is 15~40mm;
B) azobenzene, polylysin are rendered to respectively in the chloroform solvent, the concentration of azobenzene is 50~200mg/ml in this solution, and the concentration of polylysin is 125~500mg/ml, azobenzene and polylysin mass ratio be 1:2.5; Carbon black is rendered in the tetrahydrofuran, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Getting a certain amount of carbon black suspension adds in azobenzene-polylysin solution and forms mixed solution, the mass percent of carbon black is 2%-12% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 3~15k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1, acquisition contains the taste sensor of polymer-carbon black.
Above-mentioned Al 2O 3Substrates such as ceramic substrate useable glass, silicon chip replace, and spoon shape gold electrode adopts the interdigitated gold electrode to replace.
With prior art relatively, the present invention has following outstanding advantage: 1) with viscoelasticity polymkeric substance polylysin, polylactic acid as the quick layer of flavor basic material, have better solubility, stability; 2) carbon-black doped particulate, the conductivity " compensation " that the tunnel effect of carbon black particle with satisfactory electrical conductivity in viscoelasticity polymer three-dimensional spacial framework produces the dielectricity of polymkeric substance, make that the quick layer of flavor is more responsive to solution composition, thus the sensitivity that has improved sensor; 3) directly the dripping method deposition is distinguished the flavor of quick layer, and is simple to operate, fixed dripping quantity, the good reproducibility of film; 4) manufacturing process is simple, and production cost is low; 5) can work at normal temperatures, sensor bulk is little, and measuring method and circuit are simple, helps realizing the microminiaturization, integrated of artificial sense of taste system.
Description of drawings
Fig. 1 is the structural representation that contains the taste sensor of polymer-carbon black of the present invention.
Embodiment
Embodiment 1:
A kind of preparation method who contains the taste sensor of polymer-carbon black is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 300 μ m, and golden film thickness is 300nm, and electrode length is 15mm;
B) polylactic acid PLLA is rendered in the chloroform solvent, the concentration of PLLA is 5mg/ml, and with magnetic stirring apparatus water-bath heated and stirred, temperature is 60 ℃, melts fully up to PLLA; Carbon black is rendered in the benzene, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Get a certain amount of carbon black suspension and add formation PLLA-carbon black mixed solution in the PLLA solution to, the mass percent of carbon black is 2% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the PLLA-carbon black mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 5k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1 dries, and obtains to contain the taste sensor of polymer-carbon black.
Embodiment 2:
A kind of preparation method who contains the taste sensor of polymer-carbon black is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 100 μ m, and golden film thickness is 2 μ m, and electrode length is 40mm;
B) polylactic acid PLLA is rendered in the chloroform solvent, the concentration of PLLA is 15mg/ml, and with magnetic stirring apparatus water-bath heated and stirred, temperature is 60 ℃, melts fully up to PLLA; Carbon black is rendered in the benzene, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Get a certain amount of carbon black suspension and add formation PLLA-carbon black mixed solution in the PLLA solution to, the mass percent of carbon black is 12% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the PLLA-carbon black mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 1k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1 dries, and obtains to contain the taste sensor of polymer-carbon black.
Embodiment 3:
A kind of preparation method who contains the taste sensor of polymer-carbon black is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 200 μ m, and golden film thickness is 1.2 μ m, and electrode length is 30mm;
B) polylactic acid PLLA is rendered in the chloroform solvent, the concentration of PLLA is 10mg/ml, and with magnetic stirring apparatus water-bath heated and stirred, temperature is 60 ℃, melts fully up to PLLA; Carbon black is rendered in the benzene, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Get a certain amount of carbon black suspension and add formation PLLA-carbon black mixed solution in the PLLA solution to, the mass percent of carbon black is 7% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the PLLA-carbon black mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 3k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1 dries, and obtains to contain the taste sensor of polymer-carbon black.
Embodiment 4:
A kind of preparation method who contains the taste sensor of polymer-carbon black is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 100 μ m, and golden film thickness is 300nm, and electrode length is 15mm;
B) azobenzene, polylysin are rendered to respectively in the chloroform solvent, the concentration of azobenzene is 200mg/ml in this solution, and the concentration of polylysin is 500mg/ml, azobenzene and polylysin mass ratio be 1: 2.5; Carbon black is rendered in the tetrahydrofuran, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Getting a certain amount of carbon black suspension adds in azobenzene-polylysin solution and forms mixed solution, the mass percent of carbon black is 12% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 3k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1, acquisition contains the taste sensor of polymer-carbon black.
Embodiment 5:
A kind of preparation method who contains the taste sensor of polymer-carbon black is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 300 μ m, and golden film thickness is 2 μ m, and electrode length is 40mm;
B) azobenzene, polylysin are rendered to respectively in the chloroform solvent, the concentration of azobenzene is 50mg/ml in this solution, and the concentration of polylysin is 125mg/ml, azobenzene and polylysin mass ratio be 1: 2.5; Carbon black is rendered in the tetrahydrofuran, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Getting a certain amount of carbon black suspension adds in azobenzene-polylysin solution and forms mixed solution, the mass percent of carbon black is 2% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 15k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1, acquisition contains the taste sensor of polymer-carbon black.
Embodiment 6:
A kind of preparation method who contains the taste sensor of polymer-carbon black is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate 1, make the spoon shape gold electrode 2 that has 2 gold solder dishes 4 with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 200 μ m, and golden film thickness is 1.2 μ m, and electrode length is 30mm;
B) azobenzene, polylysin are rendered to respectively in the chloroform solvent, the concentration of azobenzene is 120mg/ml in this solution, and the concentration of polylysin is 300mg/ml, azobenzene and polylysin mass ratio be 1:2.5; Carbon black is rendered in the tetrahydrofuran, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Getting a certain amount of carbon black suspension adds in azobenzene-polylysin solution and forms mixed solution, the mass percent of carbon black is 7% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode 2, form the quick layer 3 of flavor, be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 9k Ω;
C) the zone coating epoxy resin beyond the quick layer 3 of taste removal on substrate 1, acquisition contains the taste sensor of polymer-carbon black.
List of references
[1].Toko?K.A?taste?sensor.Meas.Sci.Techn.,1998,9:1919-1936
[2].Patrik?lvarsson,Yukiko?Kikkawa,Fredrik?Winquist,et?al.,Comparison?of?avoltammetric?electronic?tongue?and?a?lipid?membrane?taste?sensor,Analytica?ChimicaActa,2001,449:59-68
[3]M.Ferreira.C.J.LConstantino,A.Riul,H.C.Mattoso.Preparation,characterizationand?taste?sensing?properties?of?Langmuir-Blodgett?Films?from?mixtures?of?polyanilineand?a?ruthenium?complex.Polymer,2003,44:4205-4211
[4].Yu.G.Mourzina,J.Schubert,W.Zander,et?al.,Development?of?multi-sensorsystems?based?on?chalcogenide?thin?film?chemical?sensors?for?the?simultaneousmulticomponent?analysis?of?metal?ions?in?complex?solutions,Electrochimica?Acta,2001,47:251-258
[5].Parra?V,Hernando?T,et?al.Electrochimica?Acta,2004,49:5177-5185
[6]SARMISHTHA?MAJUMDAR,BASUDAM?ADHIKARI.Polyvinyl?alcohol-cellulosecomposite:a?taste?sensing?material.Bull.Mater.Sci.,2005,28:703-712

Claims (3)

1. a preparation method who contains the taste sensor of polymer-carbon black is included in substrate (1) and goes up a making spoon shape gold electrode (2), and the preparation quick layer of flavor (3) on spoon shape gold electrode prepares gold solder dish (4), it is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate (1), make the spoon shape gold electrode (2) that has 2 gold solder dishes (4) with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 100~300 μ m, and golden film thickness is 300nm~2 μ m, and electrode length is 15~40mm;
B) polylactic acid PLLA is rendered in the chloroform solvent, the concentration of PLLA is 5~15mg/ml, and with magnetic stirring apparatus water-bath heated and stirred, temperature is 60 ℃, melts fully up to PLLA; Carbon black is rendered in the benzene, and the concentration of carbon black was 100mg/ml, with ultrasonic agitation device degraded 20 minutes; Get a certain amount of carbon black suspension and add formation PLLA-carbon black mixed solution in the PLLA solution to, the mass percent of carbon black is 2%~12% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the PLLA-carbon black mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode (2), form the quick layer of flavor (3), be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 1~5k Ω;
C) go up the quick layer of taste removal (3) zone coating epoxy resin in addition at substrate (1), dry, obtain to contain the taste sensor of polymer-carbon black.
2. a preparation method who contains the taste sensor of polymer-carbon black is included in substrate (1) and goes up a making spoon shape gold electrode (2), and the preparation quick layer of flavor (3) on spoon shape gold electrode prepares gold solder dish (4), it is characterized in that adopting following steps:
A) at Al 2O 3On the ceramic substrate (1), make the spoon shape gold electrode (2) that has 2 gold solder dishes (4) with vacuum sputtering or chemical vapour deposition technique, the electrode separation of spoon shape gold electrode is 100~300 μ m, and golden film thickness is 300nm~2 μ m, and electrode length is 15~40mm;
B) azobenzene, polylysin are rendered to respectively in the chloroform solvent, the concentration of azobenzene is 50~200mg/ml in this solution, and the concentration of polylysin is 125~500mg/ml, azobenzene and polylysin mass ratio be 1: 2.5; Carbon black is rendered in the tetrahydrofuran, and the concentration of carbon black was 100mg/mI, with ultrasonic agitation device degraded 20 minutes; Getting a certain amount of carbon black suspension adds in azobenzene-polylysin solution and forms mixed solution, the mass percent of carbon black is 2%~12% in the mixed solution, and be stirred to evenly with the ultrasonic agitation device, the mixed solution of getting 1 μ l with little pipettor directly drips on spoon shape gold electrode (2), form the quick layer of flavor (3), be placed in the baking box and dry, temperature is 80 ℃, records to stop heating when its aerial stable DC resistance is 3~15k Ω;
C) go up the quick layer of taste removal (3) zone coating epoxy resin in addition at substrate (1), obtain to contain the taste sensor of polymer-carbon black.
3. method according to claim 1 and 2 is characterized in that: spoon shape gold electrode adopts interdigital gold electrode to replace.
CNB2007100676601A 2007-03-28 2007-03-28 Method for producing taste sense transducer containing polymer-carbon black Expired - Fee Related CN100507538C (en)

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