CN103266535B - Preparation method of anti-aging agent for transformer insulation paper - Google Patents
Preparation method of anti-aging agent for transformer insulation paper Download PDFInfo
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- CN103266535B CN103266535B CN201310199385.4A CN201310199385A CN103266535B CN 103266535 B CN103266535 B CN 103266535B CN 201310199385 A CN201310199385 A CN 201310199385A CN 103266535 B CN103266535 B CN 103266535B
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- Prior art keywords
- paper
- cellulose
- nano
- insulating paper
- insulating
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000009413 insulation Methods 0.000 title abstract description 10
- 230000003712 anti-aging effect Effects 0.000 title abstract 4
- 230000032683 aging Effects 0.000 claims abstract description 28
- 229920002678 cellulose Polymers 0.000 claims abstract description 24
- 239000001913 cellulose Substances 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims abstract description 8
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims abstract description 8
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims abstract description 8
- 230000000977 initiatory effect Effects 0.000 claims abstract description 6
- 238000005406 washing Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 239000012153 distilled water Substances 0.000 claims description 8
- 235000019394 potassium persulphate Nutrition 0.000 claims description 7
- 229940079827 sodium hydrogen sulfite Drugs 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 229920000877 Melamine resin Polymers 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 229920001131 Pulp (paper) Polymers 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000011122 softwood Substances 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims 1
- 238000005903 acid hydrolysis reaction Methods 0.000 claims 1
- 229910021653 sulphate ion Inorganic materials 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 238000003756 stirring Methods 0.000 abstract description 4
- -1 nitrogen-containing compound Chemical class 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract 3
- 238000002156 mixing Methods 0.000 abstract 1
- 231100000989 no adverse effect Toxicity 0.000 abstract 1
- 238000001291 vacuum drying Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- 206010067482 No adverse event Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003679 aging effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000012966 redox initiator Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Organic Insulating Materials (AREA)
- Paper (AREA)
Abstract
The invention discloses a preparation method of an anti-aging agent for transformer insulation paper. Firstly, sequentially adding nano-cellulose and water in a reaction vessel according to a proportion, uniformly mixing, adding potassium persulfate and sodium bisulfite according to a proportion while stirring, and initiating for 10-30min at the temperature of 40-60 ℃; then adding high nitrogen-containing compound, reacting for 3-6h at the grafting reaction temperature of 50-70 ℃, washing, and vacuum drying to obtain the anti-aging agent. The insulating paper prepared by adding the anti-aging agent disclosed by the invention is excellent in high-temperature resistance and aging resistance, the high-temperature resistance and aging resistance of the insulating paper are improved by 10-20% under the same condition, and the insulating paper has no adverse effect on the properties of transformer oil in a transformer oil paper insulating system and does not influence the insulating performance of the oil paper insulating system.
Description
Technical field
The invention belongs to polymer chemistry age resister technical field, particularly the ageing-resistant preparation method of a kind of transformer insulating paper.
Background technology
Transformer is the visual plant of power system, once have an accident, may cause large-area power-cuts, and maintenance cycle is long, and maintenance cost is high, affects wide.The insulation form of transformer mainly adopts paper oil insulation structure, utilizes insulating oil varnish(ed) paper, eliminates the air gap that insulating paper fiber hole produces, and improves the electrical strength of its insulation.Transformer after having used certain time limit due to the effect of the aging actions such as temperature, moisture, oxygen, can make insulating paper generation insulation ag(e)ing, the ageing process of insulating paper is irreversible, aging due to insulating paper, it bears the electrodynamic ability of short circuit current and significantly reduces, and is the main cause that causes Power Transformer Faults.
The raw material of insulating paper of manufacturing paper with pulp is mainly kp softwood pulp, its content of cellulose is high and fiber is longer, to guarantee that insulating paper has higher intensity, for the electrical strength that guarantees that it is good, need guarantee as far as possible that the system of manufacturing paper with pulp is clean, remove residual impurity in paper, bubble and moisture etc., the difference of elimination Substance and thickness distribution.Insulating paper is in the process of using, under the higher environment of temperature, use for a long time, especially in super, UHV transmission transformer equipment, insulating paper is in hot environment for a long time, can accelerate the aging of paper fibre, a series of physicochemical change occurs, cause insulating paper machinery, electric and heat endurance reduces gradually, makes insulating paper generation insulation ag(e)ing.Insulating paper ageing form mainly contains that aging, the heat ageing of electricity, mechanical force are aging, moisture promotes aging etc.When insulating paper is aging while approaching its end of life, the security to power transformer is produced to tremendous influence.Adopt acrylonitrile modified natural fiber, produce cyanoethylated fibre insulating paper, can improve the high temperature resistant ageing resistance of insulating paper, but acrylonitrile facile hydrolysis and to environment.
Nano-cellulose is a kind of nano-grade cellulosic extracting from natural fabric, has huge specific area, and surface contain abundant hydroxyl and carboxyl, have a extensive future.
Summary of the invention
In order to overcome the shortcoming that above-mentioned insulating paper is aging, the object of the present invention is to provide the ageing-resistant preparation method of a kind of transformer insulating paper, prepared age resister can improve the high temperature resistant ageing resistace of insulating paper, extends the life-span of insulating paper.
The present invention is applicable to the ageing-resistant preparation of transformer insulating paper.
Technical scheme of the present invention is: the ageing-resistant preparation method of a kind of transformer insulating paper, is characterized in that:
1. take nano-cellulose as raw material, nano-cellulose is added to water and be made into the nano-cellulose suspension that mass concentration is 10-20%, add potassium peroxydisulfate and sodium hydrogensulfite as initator, addition is the 5-10% of nano-cellulose oven-dry weight, the mass ratio of potassium peroxydisulfate and sodium hydrogensulfite is 2:1-5:1, initiation temperature 40-60 ℃, causes time 10-30min; Then add high nitrogen-containing compound (dicyandiamide or melamine), addition is the 50-80% of nano-cellulose oven-dry weight, reaction temperature 50-70 ℃, reaction pH7-8, pH value adopts 1% NaOH or acetic acid adjusting, and reaction time 3-6h, after reaction finishes, with distilled water washing, vacuumize obtains insulating paper age resister; 2. modified nanometer cellulose age resister of the present invention is made into the suspension of 1-5%, for the insulating paper of manufacturing paper with pulp, age resister consumption is the 0.1%-1% of absolute dried paper pulp quality, can significantly improve the ageing resistace of insulating paper, the high temperature resistant ageing resistace of insulating paper of under equal conditions, adding after age resister improves 10-20%.
Technical scheme of the present invention can produce following technique effect:
Add insulating paper prepared by age resister of the present invention, it is high temperature resistant, and ageing resistace is good, and under equal conditions, ageing resistace that insulating paper is high temperature resistant improves 10-20%; In paper oil insulation system, transformer oil properties is had no adverse effects, and do not affect the insulating properties of paper oil insulation system, extended the service life of transformer insulating paper.
Technical characterstic of the present invention:
The nano-cellulose that utilizes cellulose that distributed in nature is the widest to prepare, surface is rich in abundant hydroxyl, pass through redox initiation system, the high nitrogen-containing compound of grafting, prepare nano-cellulose-dicyandiamide (melamine) age resister, be added in some way paper making wet part, the high temperature resistant ageing resistace of insulating paper of manufacturing paper with pulp out is good, under equal conditions, its high temperature resistant ageing resistace improves 10-20%; In paper oil insulation system, transformer oil properties is had no adverse effects, and do not affect the insulating properties of oilpaper system.
The specific embodiment
Embodiment 1:
In there-necked flask, add nano-cellulose 15g, distilled water 85ml, after stirring, install agitator, be placed in water-bath, in there-necked flask, add potassium peroxydisulfate 0.72g and sodium hydrogensulfite 0.18g, at temperature 60 C, after initiation reaction 15min, add dicyandiamide 9g, reaction temperature is warmed up to 65 ℃, NaOH with 1% regulates reaction pH7.5, and after reaction 5h, reaction finishes, with distilled water washing, vacuumize obtains nano-cellulose for insulating paper-dicyandiamide age resister.
Embodiment 2:
In there-necked flask, add nano-cellulose 20g, distilled water 180ml, after stirring, install agitator, be placed in water-bath, in there-necked flask, add potassium peroxydisulfate 1.5g and sodium hydrogensulfite 0.5g, 55 ℃ of temperature, after initiation reaction 20min, add dicyandiamide 14g, reaction temperature is warmed up to 60 ℃, NaOH with 1% regulates reaction pH7.5, and after reaction 6h, reaction finishes, with distilled water washing, vacuumize obtains nano-cellulose for insulating paper-dicyandiamide age resister.
Embodiment 3:
In there-necked flask, add nano-cellulose 20g, distilled water 180ml, after stirring, install agitator, be placed in water-bath, in there-necked flask, add potassium peroxydisulfate 1.5g and sodium hydrogensulfite 0.5g, 55 ℃ of temperature, after initiation reaction 20min, add melamine 14g, reaction temperature is warmed up to 65 ℃, NaOH with 1% regulates reaction pH7.5, and after reaction 5h, reaction finishes, with distilled water washing, vacuumize obtains nano-cellulose for insulating paper-melamine age resister.
Claims (2)
1. the ageing-resistant preparation method of transformer insulating paper, is characterized in that:
1. take nano-cellulose as raw material, nano-cellulose is added to water and be made into the nano-cellulose suspension that mass concentration is 10-20%, add potassium peroxydisulfate and sodium hydrogensulfite as initator, addition is the 5-10% of nano-cellulose oven-dry weight, the mass ratio of potassium peroxydisulfate and sodium hydrogensulfite is 2:1-5:1, initiation temperature 40-60 ℃, causes time 10-30min; Then add one or both in dicyandiamide or melamine, addition is the 50-80% of nano-cellulose oven-dry weight, reaction temperature 50-70 ℃, reaction pH7-8, pH value adopts 1% NaOH or acetic acid adjusting, and reaction time 3-6h, after reaction finishes, with distilled water washing, vacuumize obtains insulating paper age resister; 2. modified nanometer cellulose age resister is made into the suspension of 1-2%, for the insulating paper of manufacturing paper with pulp, age resister consumption is the 0.1%-1% of absolute dried paper pulp quality, can significantly improve the ageing resistace of insulating paper, under equal conditions, add the high temperature resistant ageing resistace raising of the insulating paper 10-20% that age resister is manufactured paper with pulp.
2. preparation method according to claim 1, is characterized in that nano-cellulose during step is 1. that to take bleached sulphate softwood pulp or Cotton Pulp be raw material, adopts sulphuric acid hydrolysis preparation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199385.4A CN103266535B (en) | 2013-05-27 | 2013-05-27 | Preparation method of anti-aging agent for transformer insulation paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310199385.4A CN103266535B (en) | 2013-05-27 | 2013-05-27 | Preparation method of anti-aging agent for transformer insulation paper |
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| Publication Number | Publication Date |
|---|---|
| CN103266535A CN103266535A (en) | 2013-08-28 |
| CN103266535B true CN103266535B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310199385.4A Expired - Fee Related CN103266535B (en) | 2013-05-27 | 2013-05-27 | Preparation method of anti-aging agent for transformer insulation paper |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106812020B (en) * | 2015-11-27 | 2018-04-17 | 中国制浆造纸研究院有限公司 | A kind of transformer insulating paper heat resistance accessory, preparation method and applications |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5787011A (en) * | 1980-11-19 | 1982-05-31 | Takaoka Electric Mfg Co Ltd | Method of producing insulating paper with duct |
| CN1176271C (en) * | 2001-07-25 | 2004-11-17 | 中国科学院成都有机化学研究所 | High-temperature aging resisting assistant for transformer insulating paper and its making process and application |
| CN102723152A (en) * | 2012-07-09 | 2012-10-10 | 重庆大学 | Modifying method for improving puncture strength of cellulose insulation paper and insulation paper |
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| CN103266535A (en) | 2013-08-28 |
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