CN105925180A - Color-variable temperature measurement method of insulation layers of power products - Google Patents
Color-variable temperature measurement method of insulation layers of power products Download PDFInfo
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- CN105925180A CN105925180A CN201610367099.8A CN201610367099A CN105925180A CN 105925180 A CN105925180 A CN 105925180A CN 201610367099 A CN201610367099 A CN 201610367099A CN 105925180 A CN105925180 A CN 105925180A
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- temperature
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/26—Thermosensitive paints
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/12—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance
- G01K11/16—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in colour, translucency or reflectance of organic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a color-variable temperature measurement method of insulation layers of power products. The method comprises the following steps: mixing methyl trichlorosilane with dimethyldichlorosilane, adding a tackifying agent, an organic solvent and water, washing with water to remove acid, and carrying out polycondensation in the presence of a catalyst to prepare organosilicone resin; mixing a reversible temperature-sensitive color-variable material with the organosilicone resin, and finally adding the reversible temperature-sensitive color-variable material, casting, mould pressing, curing and molding at the temperature of 160-200 DEG C to prepare an ink base material; coating the surfaces of the power products with the reversible temperature-sensitive color-variable material. Through the color-variable temperature measurement method of insulation layers of power products, equipment contact points, busbars and cable trenches can be conveniently mounted and observed according to the coated insulation material capable of changing colors along with the temperature change; the insulation effect is achieved while the low-cost temperature measurement reminding effect is achieved.
Description
Technical field
The present invention relates to protection and the insulant of power equipment, a kind of power product insulation
Layer thermochromic method.
Background technology
For ensureing to run safety, power product typically requires and insulate exposed electronic device
Process, for preventing the excessive or bad contact of electric current from causing temperature too high, need the operation to electrical equipment
Temperature is monitored.
The method generally carrying out insulation processing is to be wrapped up by electronic device with insulant, typically makes
In the majority with insulating sheath.Distribution and the junction point of converting equipment, bus, busbar, plug-in strip, stake at present
First-class many employings trichroism insulating sheath parcel, completely obscured firmly equipment after installation, it is impossible to observe and set
Standby operation.As there is leaky, due to the parcel of coloured insulating sheath, fortune inspection personnel cannot see
Measure the spark that electric leakage produces, it is impossible to safeguard in time and overhaul, harm controller switching equipment and distribution line
The safety on road, easily causes fault；And for electrical equipment temperature control, generally use the reddest at present
The means of outer thermometric, this mode cost of labor is high, and monitoring subjectivity is big, it is impossible to indicate temperature in real time
Whether exceed standard.
Now with a kind of method of real-time monitoring, use temperature-measuring system of distributed fibers, induction point is glued
Tie at the point for measuring temperature needed, it is possible to monitoring point for measuring temperature temperature in real time, abroad except using insulating sheath
Outward, researcher is had to need to do at devices such as internal surface of sleeve pipe or bus, busbar, plug-in strip, rheology, pile crowns
Insulation processing goes out to implant temperature sense fiber grating or temperature-sensing probe, monitors position by fiber grating pair
Temperature is monitored in real time.The method accuracy is high, decreases human cost, but cost is too high,
Test point needs the most accurately to arrange, and signal transmission cannot accomplish noiseless radio transmission, particularly
Thermometric induction point cannot be installed at equipment junction point, therefore cannot use out of doors transformator and plug-in strip,
At the equipment junction points such as pile crown.
Summary of the invention
The technical problem to be solved is while realization provides insulating protection to power product
Solution cannot visible observation, it is impossible to provide temperature directly perceived to show, the problem that real-time monitoring cost is higher,
A kind of power product insulating barrier thermochromic method is provided.
Described power product insulating barrier thermochromic method, it is characterised in that: include that following order is carried out
Step:
The first step, methyl trichlorosilane is mixed with dimethyldichlorosilane, add be mixed into tackifier,
Organic solvent and water, obtain acidic hydrolysis thing, removes acid through washing, obtains the first condensation polymer of neutrality,
Organosilicon silicones it is polycondensed into further under catalyst；
Second step, reversible temperature-sensing discoloring material is mixed with organosilicon silicones, by reversible temperature-sensitive variable color
Material adds organosilicon silicones, after stirring, adds initiator or firming agent, is eventually adding reversible sense
Temperature off-color material, at a temperature of 160 DEG C～200 DEG C, process casting, mold pressing, curing molding are ink base
Material；
3rd step, at the surface-coated reversible temperature-sensing discoloring material of power product.
According to technology development need, the present invention can according to variations in temperature the insulant of variable color, this material
Material uses coating, can install equipment contact point, busbar bus, cable duct etc. easily
And observe, raise due to temperature when occurring abnormal, insulator color can be made to change, rising
The effect that cheap thermometric is reminded can be played while insulating effect, and construction is with easy to maintenance.
The present invention provides more convenient method to current state service work, for distribution converting equipment
The monitoring of running status and the measurement of equipment junction point temperature provide means the most intuitively, it is possible to ensure
When device temperature occurs abnormal, operation maintenance personnel can intuitively obtain situation, maintain easily and overhaul.
Detailed description of the invention
Reversible temperature-sensing discoloring material is prepared by electron transfer type organic compound system, passes through temperature
Change, make electron transition recurring structure change thus realize the change of color.Leading at power equipment
Surface coating reversible temperature-sensing discoloring material, and make the variable color critical point of reversible temperature-sensing discoloring material arrange
For temperature threshold value, insulation and temperature observation can be realized simultaneously, and with low cost, easy construction,
It is convenient to safeguard, monitoring is without dead point.
Existing reversible temperature-sensing discoloring material is commonly used in ink and toy, is used in electrical material still
Material property need to be made adjustment.Temperature-sensing color-changing material can be used for polypropylene (PP), flexible PVC
(S-PVC), the injection of the transparent or semitransparent plastics such as AS, ABS and silica gel, extrusion moulding.
Also cast in can being mixed into unsaturated polyester, epoxy resin, lucite or nylon monomer, mold, admittedly
The ink substrate that chemical conversion type is suitable.Processing temperature should control below 200 DEG C, and reduce material as far as possible
Heated time.First off-color material should be added when casting, mold pressing, curing molding use off-color material
In entering unsaturated polyester, lucite or nylon monomer, interior dispersed with stirring is uniform, then adds initiation
Agent or firming agent start polymerization or cross-linking reaction.Because system viscosity drastically raises after pre-polymerization, now
Add off-color material and can make a large amount of particle encapsulation together, it is difficult to be uniformly dispersed.It addition, stirring now
Mix operation and also can make system remains a large amount of bubble.It should be noted that injection and extrusion use and become
During color material, (such as: titanium dioxide, plastics should not use other inserts or common pigments the most simultaneously
Calcium carbonate, barium sulfate, carbon black etc.), otherwise will shield color changeable effect.In epoxy resin and insatiable hunger
During the crosslinking curing of polyester resin, produce powerful shrinkage stress inside it sometimes, cause
Camouflage paint microcapsule shell ruptures, and other chemical substance enters and makes it lose discolouration inside pigment
Energy.This situation is when epoxy resin cure thickness is more than 0.2 millimeter and uses many amine curing agents
Often occur.Therefore use this kind of off-color material, use the compatibility good and the matrix of good insulation preformance
Resin such as organic siliconresin can be relatively good as substrate resin.
1. base resin material performance
Organosilicon, English name: silicone, i.e. organo-silicon compound, refer to containing Si-O key and
At least an organic group is the compound being directly connected with silicon atom.Organosilicon material has uniqueness
Structure:
1) shielding of high-octane polysiloxane backbone is got up by methyl sufficient on Si atom；
2) C-H is nonpolarity, makes intermolecular interaction the faintest；
3) Si-O bond distance is longer, and Si-O-Si key bond angle is big.
4) Si-O key be have 50% ionic bond feature covalent bond (covalent bond has directivity,
Ionic bond is non-directional).
Due to the structure that organosilicon is unique, have both the performance of inorganic material and organic material, there is table
The fundamental propertys such as surface tension is low, viscosity-temperature coefficient is little, compressibility is high, gas permeability is high, and have resistance to
High/low temperature, electric insulation, resistance to oxidation stability, weatherability, difficult combustion, hydrophobic, corrosion-resistant, nontoxic
The excellent specific properties such as tasteless and physiological inertia.Particularly insulating properties, its dielectric loss, proof voltage, resistance to
Electric arc, Inverter fed motor, specific volume resistance and surface resistivity etc. all come out at the top in insulant,
And their electric property is affected the least by temperature and frequency.Therefore, they are a kind of stable
Electrically insulating material, and possess the water repellency of excellence, it is a kind of insulating material reliably.
Organic siliconresin is highly cross-linked cancellated polysiloxane, it is common that with methyl three
Chlorosilane, dimethyldichlorosilane, phenyl trichlorosilane, diphenyl dichlorosilane or aminomethyl phenyl two
The various mixture of chlorosilane, in the presence of organic solvent is such as toluene, hydrolyzable at a lower temperature,
Obtain acidic hydrolysis thing.The initial product of hydrolysis is ring-type, line style and the mixing of cross linked polymer
Thing, generally possibly together with considerable hydroxyl.Hydrolysate removes acid through washing, neutral first condensation polymer in
In air, thermal oxide or polycondensation further in the presence of a catalyst, eventually form highly cross-linked stereoscopic graticule
Network structure.The silicones quantity i.e. R/Si value containing organic group is to control referring mainly to of silicones quality
One of mark, the curable of organic siliconresin, paint film flexibility, hardness, thermostability and thermal cracking resistance
Deng all relevant with R/Si.The R/Si of general linear silicone oil be slightly larger than 2, the R/Si of silicone rubber close to
2, and the R/Si of silicones is about 1.0.R/Si value is the least, and the curing performance of silicones is the best,
Thermal weight loss is the least, and paint film is hard, but reduction of pliability, paint film becomes fragile, and impact strength reduces；
R/Si value is the biggest, silicones be accomplished by under high temperature (200-250 DEG C) long-time baking or by
Solidifying in drier effect, make pliability preferable, hardness of paint film is poor, has preferable shock resistance
Intensity.
Additionally, the performance of silicones is also closely related with the kind of organic group R, when organic group is
During-CH3, silicones heat stability, hydrophobicity, release property, arc resistance can be given；When organic
Base is-C6H5Time, give silicones oxidation stability, the heat stability of resin can be improved；When organic
Base is-CH=CH2Time, the curing performance of silicones can be improved and give coupled；When organic group is
When phenyl, ethyl, silicones and organic blended property can be improved；When organic group is-NH2(CH2)
Time, the water solublity of polymer can be improved, give coupled simultaneously；When organic group is chain alkyl,
The hydrophobicity of silicones can be improved.Therefore, can select with different groups according to concrete performance requirement
Siloxanyl monomers prepare silicones.
Organosilicon silicones is a kind of heat cured plastics, and one of performance that it is the most prominent is excellent heat
Oxidation stability.After 250 DEG C are heated 24 hours, silicones weightlessness is only 2～8%.Silicones another
Prominent performance is excellent electrical insulation capability, and it all can keep it in wide temperature and frequency range
Good insulating properties.The electric breakdown strength of general silicones is 50 kvolts/millimeter, specific insulation
Being 1013～1015 ohm/cm, dielectric constant is 3, and dielectric loss angle tangent value is left at 10-30
Right.Additionally, silicones also has the ozone moisture resistance, waterproof, antirust, cold-resistant, resistance to and weather-proof of brilliance
Performance, the decay resistance of the chemical reagent such as dilute mineral acid aqueous to the overwhelming majority is good.Weatherability
Being one of important feature of organic siliconresin, the methylsiloxane in organic siliconresin is to ultraviolet light almost
Not absorbing, the siloxanes containing PhSiO1.5 or Ph2SiO chain link the most only absorbs the light of below 280nm
Line (includes a small amount of ultraviolet light), therefore sunlight is less on the impact of silicones, this silicon tree just
The main cause that grease coating material weatherability is excellent.
For mechanical performance, can be adjusted by adjusting resinous molecular structure, when trifunctional or
Four sense chain link content are the highest, when i.e. crosslink density is the biggest, can obtain the paint of high rigidity and low elasticity
Film；Introduce the substituent group of large space steric hindrance, pliability and thermoelasticity can be improved.Silicones to ferrum,
The cementabilities such as aluminum, silver, stannum, glass and pottery are good, but not good enough to the cementability of copper, particularly exist
High temperature and Long Time Thermal aging after, may make the oxide film of other of copper have acceleration silicones Pyrolysis
Answer event.Silicone grease, to the cementability to organic material such as plastics, silicone rubber etc., depends primarily on the latter
Surface can and with the compatibility of silicones.Surface can be more difficult to glue by the lowest and that the compatibility is the poorest material
Connect.By to the process of substrate surface (including frosted and bottoming), particularly introduce in silicones
Adhesion-promoting composition, can improve the silicones cementability to difficult substrates to a certain extent.
2. temperature-sensing color-changing material performance
Reversible temperature-sensing discoloring material is prepared by electron transfer type organic compound system.Electron transfer
Type organic compound is the organic chromophoric system that a class has special chemical structure.At a certain temperature because of
Electron transfer makes this organic molecular structure change, thus realizes color transition.This variable color
Material is the most bright-colored, and can realize from " coloured to colourless " and " colourless to coloured " shape
State color change, this be heavy metal double salt Complex Type and liquid crystal type reversible temperature-sensitive electrochromic substance institute not
Possess.
The reversible temperature-sensitive electrochromic substance of micro encapsulation is referred to as reversible temperature-sensing discoloring material.This material
Granule is spherical shape, and average diameter is 2～7 microns.Being electrochromic substance inside it, outside is one layer
Thick about 0.2～0.5 micron can not dissolve the transparent outer cover that also will not melt, and it protects variable color just
Material is from the erosion of other chemical substances.Therefore, in use avoiding damage to this layer of shell is very
Important.
The type of thermosensitive chromotropic material is divided into thermal discoloration type and hot color development type, and thermal discoloration type when low temperature is
Colored state, when temperature rises to setting value, color becomes colorless from coloured.Its discoloring temperature can root
Need to set in the range of-20～80 DEG C according to user.The kind of this kind of off-color material is most, and chromatograph is neat
Entirely, it is the most frequently used off-color material；Hot color development shaped material is colorless state when low temperature, when temperature liter
Become coloured to color during setting value from colourless.Owing to temperature-sensing color-changing material itself is a unstables ystem
System, therefore its light resistance is poor, is exposed to the sun and quickly can lose efficacy, therefore the most only under sunburst irradiates
It is applicable to indoor use.
3. preparation technology
Excellent preparation technology is to make Reversible temperature to become the important guarantee of material.In actual applications, sense
Temperature colour-changing insulated material be the complex condition such as electric field, open air use, therefore its subject to corrosion,
Aging is lasting, and this just requires that it has good corrosion-resistant, ageing-resistant performance.Its insulation simultaneously
Performance is must be guaranteed, therefore needs good technique to ensure that it is transported safely the preparation of this material
OK.Use advanced Paint preparation technology to prepare heat discoloration coatings, it is ensured that coating junction point,
Bus, busbar, plug-in strip, pile crown etc. can uniformly application, it is ensured that the adhesive force of coating, insulating properties
Good.
The difficult point of this project implementation is:
1) temperature that design is visual becomes insulating sheath material final product form
This kind of material is clear, colorless in normal temperature range, can clean and see that device runs shape
Condition.When temperature reaches specified temp, color is become coloured from colourless, plays reminding effect, and
After temperature declines, color can become colorless again, possesses reversibility.Temperature is used to become material electrician at present
In material, the example of application is few, therefore designs the material forms that can conveniently use critically important.Absolutely
Edge sheath typically uses silicone rubber and PVC plastic, the moulding process of both materials to be required to high temperature
And bigger pressure, guarantor can be destroyed owing to micro encapsulation temperature becomes particle in high temperature and bigger press process
Protect shell, therefore must not select the molding pattern that high-temperature high-pressure craft makes.We select coating accordingly
Technique is prepared temperature change coatings and is studied, and the coating produced requires perfection to be painted on device
Part surface, non-foaming non-scale, strong with device surface laminating close attachment power, and can be accurate in time
The really color change according to variations in temperature, protection temperature becomes particle and is not damaged.
2) visual temperature is selected to become insulating sheath material resinous type
The resin that can be fabricated to coating has a lot, such as organic siliconresin, polyurethane resin, epoxy
Resin, acrylic resin etc..According to the feature of electrical material, need to possess good insulating, corrosion-resistant,
Ageing-resistant, wear-resisting and there is the material of certain toughness.We select organosilicon material as the base of coating
Body material.Organic siliconresin is highly cross-linked cancellated polysiloxane, has excellence
Adhesive force and decay resistance, it is possible to fast reaction, good toughness, insulating properties is good.The distribution such as transformator
Period is placed in outdoor environment, it is therefore desirable to consider its ageing-resistant performance.
3) ageing environment simulation and the design of experimental program
The durability analysis of research design material, and the aging conditions in running environment.This research
Content difficult point is, needs every influence factor in dry run environment all sidedly, including electromagnetic field,
Ess-strain, temperature and humidity condition etc., and carry out the design of senile experiment.Material is accelerated always simultaneously
Change, it is achieved the calculating in service life in complete period and assessment, its science also needs repeatedly to be proved.Guarantee
Reversible temperature becomes stability in use and the life-span of material, it is ensured that the accuracy of temperature parameter evidence, promotes material
Use safety.
Claims (1)
1. a power product insulating barrier thermochromic method, it is characterised in that: include the step that following order is carried out:
The first step, methyl trichlorosilane is mixed with dimethyldichlorosilane, add and be mixed into tackifier, organic solvent and water, obtain acidic hydrolysis thing, remove acid through washing, obtain the first condensation polymer of neutrality, under catalyst, be polycondensed into organosilicon silicones further；
Second step, reversible temperature-sensing discoloring material is mixed with organosilicon silicones, reversible temperature-sensing discoloring material is added organosilicon silicones, after stirring, add initiator or firming agent, being eventually adding reversible temperature-sensing discoloring material, at a temperature of 160 DEG C～200 DEG C, process casting, mold pressing, curing molding are ink substrate；
3rd step, at the surface-coated reversible temperature-sensing discoloring material of power product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610367099.8A CN105925180A (en) | 2016-05-27 | 2016-05-27 | Color-variable temperature measurement method of insulation layers of power products |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610367099.8A CN105925180A (en) | 2016-05-27 | 2016-05-27 | Color-variable temperature measurement method of insulation layers of power products |
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| CN105925180A true CN105925180A (en) | 2016-09-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114672169A (en) * | 2022-03-22 | 2022-06-28 | 湖南航天三丰科工有限公司 | Temperature-sensitive color-changing agent and preparation method and application thereof |
-
2016
- 2016-05-27 CN CN201610367099.8A patent/CN105925180A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114672169A (en) * | 2022-03-22 | 2022-06-28 | 湖南航天三丰科工有限公司 | Temperature-sensitive color-changing agent and preparation method and application thereof |
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Application publication date: 20160907 |