WO2001088042A1 - Organic semi-conductive composition and sensor - Google Patents

Organic semi-conductive composition and sensor Download PDF

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Publication number
WO2001088042A1
WO2001088042A1 PCT/KR2001/000787 KR0100787W WO0188042A1 WO 2001088042 A1 WO2001088042 A1 WO 2001088042A1 KR 0100787 W KR0100787 W KR 0100787W WO 0188042 A1 WO0188042 A1 WO 0188042A1
Authority
WO
WIPO (PCT)
Prior art keywords
species
sensor
content
organic
base resin
Prior art date
Application number
PCT/KR2001/000787
Other languages
French (fr)
Inventor
Jong-Sung Lee
Original Assignee
Lee Jong Sung
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 Lee Jong Sung filed Critical Lee Jong Sung
Priority to AU56848/01A priority Critical patent/AU5684801A/en
Publication of WO2001088042A1 publication Critical patent/WO2001088042A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G01N27/126—Composition of the body, e.g. the composition of its sensitive layer comprising organic polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/12—Compositions of unspecified macromolecular compounds characterised by physical features, e.g. anisotropy, viscosity or electrical conductivity
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; viscous liquids; paints; inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2829—Oils, i.e. hydrocarbon liquids mixtures of fuels, e.g. determining the RON-number
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Definitions

  • the present invention relates to an organic semi-conductive agent
  • the above method includes some problems, for example: firstly, long
  • the present invention is intended to determine species of organic compounds in situ, in a short period of time with ease, in particular it determines
  • the volume of the organic semi-conductive agent depends upon species and content
  • present invention comprises 54 wt% of EEA, 39 wt% of conductive carbon black,
  • the sensor operates by checking resistance value between the two electrodes over a
  • Figure 1 shows a side view of a feature of a sensor according to the present
  • Figure 2 shows a cross-sectional view of a sensor according to the present
  • Figure 3 shows a schematic view describing variation of resistance value
  • invention is prepared into a base resin, by mixing 54 wt% of EEA, 39 wt% of
  • EEA used herein means poly(ethylene-co-ethacrylate), in particular having
  • MI Melt Index
  • Conductive carbon black used herein is Actylene Black type, for example a
  • Antioxidant used herein means 4,4'-Thiobis(6-tertbutyl-m-cresol), for
  • Dispersing agent A used herein represents Silicon wax, for example a commercially available product Struktol WS 180 (trade name) which is
  • agent B used herein represents polyethylene wax, for example a commercially
  • Cross-linking agent used herein represents l,4-bis(t-butyl peroxy
  • isopropyl)benzone for example a commercially available product Perbutyl-P (PBP)
  • PBP Perbutyl-P
  • Base resin according to the present invention that is organic semi-
  • conductive agent is prepared from aforementioned components, including 54 wt% of
  • Such can be used as EEA in the composition of the invention includes high
  • VLDPE having a density in the range of 0.85 to 0.90 and MI (Melt Index) in the
  • acetylene black type and furnace black 2 type can be used as conductive carbon
  • Acetylene black is more suitable for use as it has less impurities, but Furnace
  • Metal Oxide (MgO) and the like can be added, and dicumyl
  • DCP peroxide
  • Base resin (1) as showed in Figure 1 is prepared by using the composition of
  • the present invention in suitable size, for example with a width and length of 2 cm
  • resistance value measured at the electrodes (2) is nearly 0, as conductive carbon
  • the resistance value increases as the distance between
  • the present invention relates to a base resin, which is made into a
  • composition comprised of 54 wt% of EEA, 39 wt% conductive carbon black, 0.25

Abstract

An organic semi-conductive agent composition and a sensor using the same, intended to detect species and content of organic compounds. The organic semi-conductive composition comprises 54 wt% of EEA, 39 wt% of conductive carbon black, 0.25 wt% of antioxidant, 6 wt% of dispersing agent, and 0.75 wt% of cross-linking agent, and the sensor using the said organic semi-conductive agent composition is formed by separately planting two electrodes on a base resin comprised of the aforementioned composition. The sensor operates by checking the resistance value between the two electrodes over a lapse in time.

Description

Figure imgf000002_0001
ORGANIC SEMI-CONDUCTIVE COMPOSITION AND SENSOR
USING THE SAME
[Field of the Invention]
The present invention relates to an organic semi-conductive agent
composition and sensor using the same, intended to be used for determining species
and content of organic compounds.
[Background of the Invention]
In case of organic compounds, it is impossible to verify their chemical
species with the naked eye or with a simple reagent, thus it needs to primarily, collect
and transfer samples to a lab, and decide their species by using an expensive gas
chromatography apparatus, for precise determination.
The above method includes some problems, for example: firstly, long
periods of time taken for determining their species as there is no way to carry out in
situ determination; secondly, use of an expensive gas chromatography apparatus, and
thirdly, need for highly intellectual human resources.
[Detailed Description of the Invention]
The present invention is intended to determine species of organic compounds in situ, in a short period of time with ease, in particular it determines
species and content of organic compounds by measuring increased volume levels of
an organic semi-conductive agent, which is represented by resistance value, wherein
the volume of the organic semi-conductive agent depends upon species and content
of organic compound which it contacts.
Such organic semi-conductive agent composition according to the
present invention comprises 54 wt% of EEA, 39 wt% of conductive carbon black,
0.25 wt% of antioxidant, 6 wt% of dispersing agent, 0.75 wt% of cross-linking agent,
and a sensor using the said organic semi-conductive agent is formed by separately
planting two electrodes on a base resin comprised of above-mentioned composition.
The sensor operates by checking resistance value between the two electrodes over a
lapse in time.
[Brief Description of the Figures]
Figure 1 shows a side view of a feature of a sensor according to the present
invention.
Figure 2 shows a cross-sectional view of a sensor according to the present
invention.
Figure 3 shows a schematic view describing variation of resistance value
from the sensor according to the present invention, with time, [Description of Symbols represented in Figures]
1 : base resin 2 : electrode
[Examples]
Organic semi-conductive agent composition according to the present
invention is prepared into a base resin, by mixing 54 wt% of EEA, 39 wt% of
conductive carbon black, 0.25 wt% of antioxidant, 1 wt% of dispersing agent A and
5 wt% of dispersing agent B, 0.75 wt% of cross-linking agent.
EEA used herein, means poly(ethylene-co-ethacrylate), in particular having
15% of ethacrylate content, and 0.7 of MI (Melt Index), for example a commercially
available product EEA A710 (trade name) which is manufactured by Mitui Dupont
(Japan) can be used herein.
Conductive carbon black used herein, is Actylene Black type, for example a
commercially available product DENKA. BLACK (trade name) which can be
obtained from DENKA (Japan) can be used herein.
Antioxidant used herein, means 4,4'-Thiobis(6-tertbutyl-m-cresol), for
example a commercially available product Santonox R (trade name) which is
manufactured by Monsanto (USA) can be used herein.
Dispersing agent A used herein, represents Silicon wax, for example a commercially available product Struktol WS 180 (trade name) which is
manufactured by Schill Seilacher (Germany) can be used herein, and dispersing
agent B used herein, represents polyethylene wax, for example a commercially
available product LC 102N (trade name) which is manufactured by Lion Chemicals
can be used herein.
Cross-linking agent used herein, represents l,4-bis(t-butyl peroxy
isopropyl)benzone, for example a commercially available product Perbutyl-P (PBP)
(trade name) which is manufactured by Nippon Oils & Fats Co can be used herein.
Base resin according to the present invention, that is organic semi-
conductive agent, is prepared from aforementioned components, including 54 wt% of
EEA, 39 wt% of conductive carbon black, 0,25 wt% of antioxidant, 1 wt% of
dispersing agent A and 5 wt% of dispersing agent B, 0.75 wt% of cross-linking agent,
and the base resin has a characteristic property such that its volume is being
increased when immersed in organic compounds, and the increased volume level
depends upon species and content of organic compounds.
Such can be used as EEA in the composition of the invention includes high
molecular compound or rubber and the like having polar functional group, as well as
VLDPE having a density in the range of 0.85 to 0.90 and MI (Melt Index) in the
range of 0.5 to 10 or metallocene catalyst. The said compounds can be used alone or
two or more combinations thereof in preparation of base resin. More specifically, when EEA and ENA is used, the amount of EA or NA
should be in the range of 10 ~ 30%, with MI of 0.5 ~ 10, and either or both of
acetylene black type and furnace black 2 type can be used as conductive carbon
black.
Acetylene black is more suitable for use as it has less impurities, but Furnace
black may be used herein, and both of them can be used in combination.
Optionally, Metal Oxide (MgO) and the like can be added, and dicumyl
peroxide (DCP) also can be used as a cross-linking agent.
When the base resin with the above composition is placed in organic
compound, its volume increases variably according to the chemical species and
content of the organic compound, and the degree of volume increase can be
measured as resistance value to determine the species and content of the subject
organic compound.
Now, a sensor using such base resin of the present invention for determining
the species and content of organic compounds is described below.
Base resin (1) as showed in Figure 1 is prepared by using the composition of
the present invention, in suitable size, for example with a width and length of 2 cm
and thickness of 3 mm.
To the base resin (1), SUS electrodes (2) having 0.7 cm in length are formed
with an interval of 1 era, as shown in Figure 1, and a resistance meter is connected to the said electrodes (2) so as to measure the resistance value.
When placing such base resin (1) into subject organic compounds, initially
resistance value measured at the electrodes (2) is nearly 0, as conductive carbon
black contained in the base resin (1) forms electron transfer pass.
However, as time passes, resistance value measured at the electrodes is
raised as the volume of the base resin (1) increases according to the species and
content of subject organic compounds.
In other words, the resistance value increases as the distance between
conductive carbon blacks becomes longer unlike the initial stage.
Resistance value detected at the electrodes (2) according to species and
content of organic compounds is shown in Figure 3, thus it is possible to determine
species of organic compounds by using the composition and sensor of the present
invention.
In an embodiment of the present invention, the time to reach 1000 Kohm
was, 7.5 minutes for gasoline, 3 minutes for gasoline containing 20% of toluene and
6.2 minutes for gasoline containing 10% of toluene, and 8.5 minutes for gasoline
containing 5% kerosene, 9 minutes for gasoline containing 10% kerosene and about
10 minutes for gasoline containing 20% kerosene.
Therefore, it is possible to determine the species and content of a certain
organic compound by checking the time, which takes to reach 1000 Kohm, or to 500 Kohm in order to save time, after placing the base resin (1) into a subject organic
compound.
As the present invention makes it possible to determine the species and
content of organic compounds by using base resin of which volume is increased
when contacting with the subject organic compound and checking the time for the
resistance value to reach a defined value, it takes a shorter time without using such
expensive apparatus.
In the present invention, it is possible to obtain the same result by measuring
the degree of increased volume, or the increased length of base resin. Also, with the
present invention, it is possible to measure the degree of degradation, i.e. oxidation
of various organic compounds, in particular to investigate degree of soil pollution
and its pollutant in investigating whether soil is polluted or not, and in the former
case, investigating the degree of pollution.
[Industrial Applicability]
The present invention relates to a base resin, which is made into a
composition comprised of 54 wt% of EEA, 39 wt% conductive carbon black, 0.25
wt% of antioxidant, 1 wt% of dispersing agent A, 5 wt% of dispersing agent B, and
0.75 wt% of cross-linking agent and has a characteristic such that the volume
changes when contacting with organic compound. Also, it relates to the method for

Claims

determining species and content of organic compound by using the above said
characteristic which shows different degrees of increased volume which is
represented by the resistance value of the base resin according to the species and
content of organic compounds, when it is placed into a subject organic compound.
The present invention can verify species and content of organic compounds in the
shortest time with a simple method, and investigating soils in a certain area,
particularly determining the presence of organic compounds, content and species.
PCT/KR2001/000787 2000-05-16 2001-05-16 Organic semi-conductive composition and sensor WO2001088042A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56848/01A AU5684801A (en) 2000-05-16 2001-05-16 Organic semi-conductive composition and sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020000026253A KR20010104942A (en) 2000-05-16 2000-05-16 Organic Semiconducting Composition and Sensor Using the Same
KR2000/26253 2000-05-16

Publications (1)

Publication Number Publication Date
WO2001088042A1 true WO2001088042A1 (en) 2001-11-22

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AU (1) AU5684801A (en)
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467199A1 (en) * 2003-04-11 2004-10-13 Therm-o-Disc Incorporated Vapor sensor and materials thereof
US7645422B2 (en) 2003-04-11 2010-01-12 Therm-O-Disc, Incorporated Vapor sensor and materials therefor
US7708947B2 (en) 2005-11-01 2010-05-04 Therm-O-Disc, Incorporated Methods of minimizing temperature cross-sensitivity in vapor sensors and compositions therefor
US7799276B2 (en) 2003-10-27 2010-09-21 Michigan Molecular Institute Functionalized particles for composite sensors
US8012420B2 (en) 2006-07-18 2011-09-06 Therm-O-Disc, Incorporated Robust low resistance vapor sensor materials
US8691390B2 (en) 2007-11-20 2014-04-08 Therm-O-Disc, Incorporated Single-use flammable vapor sensor films

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100477799B1 (en) * 2002-10-30 2005-03-22 한국전자통신연구원 Composite for electronic nose sensor and the preparation thereof
WO2023065430A1 (en) * 2021-10-18 2023-04-27 深圳供电局有限公司 High-voltage cable semi-conductive shielding material featuring high-efficiency dispersion of conductive carbon black and preparation method therefor

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JPS54105792A (en) * 1978-02-08 1979-08-20 Furukawa Electric Co Ltd:The Power cable
JPS6451941A (en) * 1987-08-24 1989-02-28 Fuji Photo Film Co Ltd Packaging material for photosensitive substance
JP2000315423A (en) * 1999-04-28 2000-11-14 Fujikura Ltd Semiconductive composition and insulated cable for direct current using same

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JPH0777872B2 (en) * 1987-09-25 1995-08-23 本田技研工業株式会社 Scooter type vehicle
US5747559A (en) * 1995-11-22 1998-05-05 Cabot Corporation Polymeric compositions
KR970042744A (en) * 1995-12-29 1997-07-26 권문구 Peelable external semiconducting composition for power cables
KR100388838B1 (en) * 1999-09-08 2003-06-25 주식회사 엔바이온 The apparatus for inspecting the properties of illegal gasoline

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54105792A (en) * 1978-02-08 1979-08-20 Furukawa Electric Co Ltd:The Power cable
JPS6451941A (en) * 1987-08-24 1989-02-28 Fuji Photo Film Co Ltd Packaging material for photosensitive substance
JP2000315423A (en) * 1999-04-28 2000-11-14 Fujikura Ltd Semiconductive composition and insulated cable for direct current using same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1467199A1 (en) * 2003-04-11 2004-10-13 Therm-o-Disc Incorporated Vapor sensor and materials thereof
US7138090B2 (en) 2003-04-11 2006-11-21 Therm-O-Disc, Incorporated Vapor sensor and materials therefor
US7645422B2 (en) 2003-04-11 2010-01-12 Therm-O-Disc, Incorporated Vapor sensor and materials therefor
US7799276B2 (en) 2003-10-27 2010-09-21 Michigan Molecular Institute Functionalized particles for composite sensors
US7998415B2 (en) 2003-10-27 2011-08-16 Michigan Molecular Institute Functionalized particles for composite sensors
US7998416B2 (en) 2003-10-27 2011-08-16 Michigan Molecular Institute Functionalized particles for composite sensors
US7708947B2 (en) 2005-11-01 2010-05-04 Therm-O-Disc, Incorporated Methods of minimizing temperature cross-sensitivity in vapor sensors and compositions therefor
US8012420B2 (en) 2006-07-18 2011-09-06 Therm-O-Disc, Incorporated Robust low resistance vapor sensor materials
US8105538B2 (en) 2006-07-18 2012-01-31 Therm-O-Disc Incorporated Robust low resistance vapor sensor materials
US8691390B2 (en) 2007-11-20 2014-04-08 Therm-O-Disc, Incorporated Single-use flammable vapor sensor films

Also Published As

Publication number Publication date
AU5684801A (en) 2001-11-26
KR20010104942A (en) 2001-11-28

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