CN201837610U - Carbon nanotube/polycaprolactone blend composite membrane gas sensor - Google Patents
Carbon nanotube/polycaprolactone blend composite membrane gas sensor Download PDFInfo
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- CN201837610U CN201837610U CN2010201336089U CN201020133608U CN201837610U CN 201837610 U CN201837610 U CN 201837610U CN 2010201336089 U CN2010201336089 U CN 2010201336089U CN 201020133608 U CN201020133608 U CN 201020133608U CN 201837610 U CN201837610 U CN 201837610U
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Abstract
The utility model relates to a carbon nanotube/polycaprolactone blend composite membrane gas sensor, which comprises an electrode which at least comprises five insulated copper wires and is packaged by epoxy resin insulator, the plane of one end of the electrode is covered by at least one layer of carbon nanotube/polycaprolactone blend composite membrane, and the other end of the electrode is connected with a lead. The process of fabrication is simple, the cost is low, and the produced carbon nanotube/polycaprolactone blend composite membrane gas sensor is convenient to carry, and is particularly suitable for the detection of organic polar gas by chemical enterprises.
Description
Technical field
The utility model relates to a kind of carbon nano-tube/poly caprolactone blend composite film gas sensor, is specially adapted to the gas sensor that organic solvent gas detects.
Background technology
Organic solvent generally uses in the chemical plant, because the organic solvent that ageing equipment, sealing problem etc. cause volatilization problem is serious day by day, the solvent of these volatilizations not only causes the wasting of resources, and operator's health caused great infringement, and have contaminated environment, potential safety hazards such as blast are along with the reinforcement of human environmental consciousness, the raising that safety in production requires, therefore being badly in need of can effective monitoring and the high-performance gas sensor that detects organic solvent concentration.The detection means of existing relevant poisonous and hazardous organic gas mainly contains analysis of thermal conductivity, uv absorption, semiconductor gas sensor, chemical analysis etc.In today, all very active to the research of new gas sensitive and respective sensor both at home and abroad based on organic semiconducting materials technology rapid progress.
Carbon nano-tube since being found in 1991, with its distinctive mechanics, electricity and chemical property and unique accurate one dimension tracheary element structure and the many potential using value that in following high-tech area, is had, become the research focus of chemistry, physics and material science rapidly.The C-C covalent bond segmented structure of carbon nano-tube and polymer segment structural similarity, can be undertaken compound by coordination bond effect and macromolecular material, carbon nano-tube has performances such as good mechanics, electricity again, the two recombination energy is obtained to have good nano composite materials such as electric conductivity.Conductive carbon nanotube mixes in crystallization or the hypocrystalline superpolymer by a certain percentage, can prepare the advanced composite material (ACM) with positive temperature coefficient effect.Because this type of material can cause the marked change of resistance when touching certain gas or organic solvent, therefore adopt polymkeric substance and conductive carbon nanotube to cause people's extensive interest as the chemical resistance type microsensor of sensitive membrane.
Summary of the invention
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides a kind of gas with various is had high sensitivity, stablizes and make simple, cheap carbon nano-tube/poly caprolactone blend composite film gas sensor and method for making.
The purpose of this utility model is finished by following technical solution, described carbon nano-tube/poly caprolactone blend composite film gas sensor, it includes one and contains five electrodes that thoroughly do away with the edge copper cash, form with the epoxyresin insulator encapsulation at least, be covered with one deck carbon nano-tube/poly caprolactone blend composite film at least on described electrode one transverse plane, the other end picks out leaded output.
Described electrode comprises that one contains and eight thoroughly does away with the edge copper cash, is encapsulated in the hard polyester hollow tubular with epoxyresin insulator and constitutes, and every eradication edge copper cash all picks out leaded output respectively from an end of electrode.
Sensor described in the utility model adopts carbon nano-tube/poly caprolactone blend composite film as gas sensitive, utilizes solvent to be coated with to touch technology to be coated in electrode surface, gets final product after the drying.It has following technique effect: (1) polycaprolactone is a kind of polyesters superpolymer of hemicrystalline, has nontoxicly, and fusing point is low, is easy to processing, the biodegradability superior characteristic; (2) carbon nano-tube has hollow structure and bigger serface, and a large amount of gas passages are provided, and gas is had great suction-operated, thereby has improved sensitivity and dwindled the volume of sensor; (3) technology manufacturing process is simple, and cost is low; (4), multiple gases is detected sensitivity, good stability through experiment confirm.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the impedance response column diagram of the utility model to five kinds of opposed polarity samples.
Fig. 3 is the resistance change curve map of the utility model variable concentrations sample.
Fig. 4 is sensor response repeatability figure of the present utility model.
Embodiment
The utility model is described in further detail with concrete enforcement below in conjunction with accompanying drawing.
Fig. 1 is the cut-open view of a kind of carbon nano-tube/poly caprolactone of the utility model blend composite film gas sensor embodiment, and it is made up of carbon nano-tube/poly caprolactone blend composite film 1, electrode 2, insulator 3, lead-in wire output 4.Described electrode 2 contains at least by one and five thoroughly does away with the edge copper cash, encapsulates with epoxyresin insulator 3 and form, and is covered with one deck carbon nano-tube/poly caprolactone blend composite film 1 at least on described electrode 2 one transverse planes, and the other end picks out leaded output 4.
The method for making of carbon nano-tube/poly caprolactone blend composite film gas sensor described in the utility model, this method is:
(1) carbon nano-tube, polycaprolactone pre-service
Carbon nano-tube is added in the nitric acid, ultrasonic dispersion, the heating deoxygenation, the deionization washing, vacuum drying is standby.
Polycaprolactone is washed with alkali cleaning, pickling, deionization, and after drying, it is standby to put into the ground flask after the vacuum drying.
(2) preparation of electrode
0.12mm insulated copper wire 8 stretching, location in cut-off footpath will be encapsulated in epoxy resin in the hard polyester hollow tubular of diameter 8.0mm.One termination goes out lead-in wire, and the other end is through polishing-alkali cleaning-pickling-silver-plated-alkali cleaning-pickling-deionization washing, and dry back is stand-by.
(3) preparation of gas sensor
In tetrahydrofuran solvent, add an amount of polycaprolactone and carbon nano-tube, sealing, be dispersed to evenly with ultrasonic cleaner, measure a certain amount of above-mentioned solution with pipettor, drippage is deposited on the electrode surface behind the cleaning-drying, makes carbon nano-tube/poly caprolactone blend composite film gas sensor through air dry and vacuum drying.
Use this sensor various sample gas is detected, all show certain susceptibility, wherein to A-benzene; The B-epichlorokydrin; The C-absolute ethyl alcohol; D-toluene; The impedance response test result of five kinds of opposed polarity samples such as E-tetrahydrofuran is shown in Fig. 2.
Use this sensor same above-mentioned five kinds of sample variable concentrations samples are tested, its resistance change curve display is in Fig. 3.
Use this sensor in repeatedly being exposed to epichlorokydrin steam and dry air, its electrical response has good repeatability and stable.Three times loop test the results are shown in Fig. 4, and horizontal ordinate is time (s) among the figure, and ordinate is resistance (K Ω).
Claims (2)
1. carbon nano-tube/poly caprolactone blend composite film gas sensor, it includes one and contains five electrodes that thoroughly do away with the edge copper cash, form with the epoxyresin insulator encapsulation at least, it is characterized in that being covered with one deck carbon nano-tube/poly caprolactone blend composite film (1) at least on described electrode (2) one transverse planes, the other end picks out leaded output (4).
2. carbon nano-tube/poly caprolactone blend composite film gas sensor according to claim 1, it is characterized in that described electrode (2) comprises that one contains and eight thoroughly does away with the edge copper cash, is encapsulated in the hard polyester hollow tubular with epoxyresin insulator (3) and constitutes, every eradication edge copper cash all picks out leaded output (4) respectively from an end of electrode (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201336089U CN201837610U (en) | 2010-03-16 | 2010-03-16 | Carbon nanotube/polycaprolactone blend composite membrane gas sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201336089U CN201837610U (en) | 2010-03-16 | 2010-03-16 | Carbon nanotube/polycaprolactone blend composite membrane gas sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201837610U true CN201837610U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201336089U Expired - Fee Related CN201837610U (en) | 2010-03-16 | 2010-03-16 | Carbon nanotube/polycaprolactone blend composite membrane gas sensor |
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| CN (1) | CN201837610U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166247A (en) * | 2017-12-22 | 2018-06-15 | 西南交通大学 | A kind of analog neuron oriented network bionic structure composite material and preparation method applied to electro photoluminescence |
| CN110207729A (en) * | 2019-05-08 | 2019-09-06 | 武汉飞帛丝科技有限公司 | A kind of flexible electronic skin |
| CN113214603A (en) * | 2021-05-12 | 2021-08-06 | 云南中烟工业有限责任公司 | Carbon nanotube epoxy resin composite material electrode, preparation method and application thereof |
-
2010
- 2010-03-16 CN CN2010201336089U patent/CN201837610U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108166247A (en) * | 2017-12-22 | 2018-06-15 | 西南交通大学 | A kind of analog neuron oriented network bionic structure composite material and preparation method applied to electro photoluminescence |
| CN110207729A (en) * | 2019-05-08 | 2019-09-06 | 武汉飞帛丝科技有限公司 | A kind of flexible electronic skin |
| CN113214603A (en) * | 2021-05-12 | 2021-08-06 | 云南中烟工业有限责任公司 | Carbon nanotube epoxy resin composite material electrode, preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110518 Termination date: 20140316 |