CN116024025A - Composite dispersing agent and preparation method and application thereof - Google Patents
Composite dispersing agent and preparation method and application thereof Download PDFInfo
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- CN116024025A CN116024025A CN202310079161.3A CN202310079161A CN116024025A CN 116024025 A CN116024025 A CN 116024025A CN 202310079161 A CN202310079161 A CN 202310079161A CN 116024025 A CN116024025 A CN 116024025A
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- 239000002131 composite material Substances 0.000 title claims abstract description 100
- 239000002270 dispersing agent Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title abstract description 29
- 150000002148 esters Chemical class 0.000 claims abstract description 65
- -1 polyoxyethylene Polymers 0.000 claims abstract description 41
- 239000006185 dispersion Substances 0.000 claims abstract description 39
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 24
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 20
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 16
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 16
- 239000001913 cellulose Substances 0.000 claims abstract description 16
- 229920002678 cellulose Polymers 0.000 claims abstract description 16
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims abstract description 16
- 229960002317 succinimide Drugs 0.000 claims abstract description 16
- 229940049964 oleate Drugs 0.000 claims abstract description 14
- 239000003921 oil Substances 0.000 claims description 81
- 239000000463 material Substances 0.000 claims description 35
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 13
- 238000001291 vacuum drying Methods 0.000 claims description 13
- 238000003756 stirring Methods 0.000 claims description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 6
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 230000002776 aggregation Effects 0.000 abstract description 7
- 238000005054 agglomeration Methods 0.000 abstract description 6
- 238000003860 storage Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 239000011810 insulating material Substances 0.000 abstract description 2
- 235000019198 oils Nutrition 0.000 description 69
- 230000000052 comparative effect Effects 0.000 description 22
- 239000000243 solution Substances 0.000 description 19
- 238000005406 washing Methods 0.000 description 9
- 239000002105 nanoparticle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 2
- 239000005642 Oleic acid Substances 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 2
- 150000004667 medium chain fatty acids Chemical class 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 239000002540 palm oil Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Organic Insulating Materials (AREA)
Abstract
The invention belongs to the technical field of insulating materials, and particularly relates to a composite dispersing agent, a preparation method and application thereof. The composite dispersing agent comprises the following components: sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose. The composite dispersing agent prepared by the invention can effectively avoid the agglomeration phenomenon of the nano modified synthetic ester insulating oil in the long-term storage or operation process, and the prepared nano modified synthetic ester insulating oil can realize excellent dispersion stability, thereby providing an effective method for improving the stability and the electrical strength of the insulating oil.
Description
Technical Field
The invention belongs to the technical field of insulating materials, and particularly relates to a composite dispersing agent, a preparation method and application thereof.
Background
At present, under the sustainable development background of pushing the environment-friendly low-carbon concept, the environment-friendly synthetic ester insulating oil with good biocompatibility and strong biodegradability has wide application prospect, and although the application of the ester-based insulating oil can make up the defects of nondegradable, unrenewable and the like of the traditional mineral insulating oil, the electrical performance of the ester-based insulating oil still has room for improvement compared with the mineral oil. The nano modified insulating oil is obtained by adding nano materials, and is one of methods for improving the electrical strength of the synthetic ester insulating oil. Researches show that the power frequency breakdown voltage and the lightning breakdown voltage of the insulating oil can be improved by the nano modification technology, and the heat conduction efficiency of the insulating oil is improved to a certain extent. However, the nanomaterial used to prepare the nano-modified insulating oil is generally an inorganic material insoluble in an organic liquid medium, and the breakdown voltage of the oil can be improved by the nano effect only when the nanoparticles form a stably dispersed colloid in the insulating oil. Therefore, in order to obtain a stable sol system, the prepared nanoparticles are mostly dispersed in the insulating oil by adding a dispersing agent.
However, most of the existing dispersion matrixes of the nano modified insulating oil are mineral oil and natural ester insulating oil, so that the research on the dispersion stability of the nano modified synthetic ester insulating oil is less, and the possibility of agglomeration phenomenon in the preparation, storage, dispersion and other processes is high due to extremely high reactivity and large specific surface area of nano particles, the dispersion effect of the added dispersing agent is weakened along with the increase of the storage or use time of the nano insulating oil, the agglomeration phenomenon of the nano particles is caused, and the stability, the insulating strength and the heat dissipation of the nano insulating oil are seriously influenced. Therefore, there is a need to develop a composite dispersant capable of improving dispersion stability of synthetic ester insulating oil.
Disclosure of Invention
The invention aims to provide a composite dispersing agent, and a preparation method and application thereof. The composite dispersing agent prepared by the invention can effectively avoid the agglomeration phenomenon of the nano modified synthetic ester insulating oil in the long-term storage or operation process, and the prepared nano modified synthetic ester insulating oil can realize excellent dispersion stability.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a composite dispersant comprising the following components: sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose.
Preferably, the content of the sodium dodecyl benzene sulfonate is 5-20% of the total mass of the composite dispersing agent, the content of the polyoxyethylene oleate is 15-30% of the total mass of the composite dispersing agent, the content of the polyisobutylene succinimide is 10-20% of the total mass of the composite dispersing agent, and the content of the cellulose is 50-60% of the total mass of the composite dispersing agent.
More preferably, the content of the sodium dodecyl benzene sulfonate is 10% of the total mass of the composite dispersing agent, the content of the polyoxyethylene oleate is 30% of the total mass of the composite dispersing agent, the content of the polyisobutylene succinimide is 10% of the total mass of the composite dispersing agent, and the content of the cellulose is 50% of the total mass of the composite dispersing agent.
The preparation method of the composite dispersing agent comprises the following steps: and uniformly mixing all the components to prepare the composite dispersing agent.
The nano modified synthetic ester insulating oil comprises the following components: composite dispersion solution, synthetic ester insulating oil and nano modified material;
the complex dispersion solution includes the complex dispersant.
Preferably, the nano modified synthetic ester insulating oil at least comprises one of the following (1) to (4):
(1) The synthetic ester insulating oil is TMP triester or PETP tetraester; the TMP triester is synthesized by esterification reaction of medium-chain fatty acid and trimethylolpropane; the PETP tetraester is synthesized by esterification reaction of medium-chain fatty acid and pentaerythritol;
(2) The concentration of the nano modified material in the synthetic ester insulating oil is 0.01 g/L-0.15 g/L;
(3) The nano modified material comprises nano TiO 2 Nano Fe 2 O 3 At least one of nano ZnOSeed;
(4) The mass ratio of the composite dispersion solution to the synthetic ester insulating oil is 1:4.
the preparation method of the nano modified synthetic ester insulating oil comprises the following steps:
s1, cleaning and drying the nano modified material for later use;
s2, preparing a composite dispersion solution: dissolving the composite dispersing agent in synthetic ester insulating oil, and stirring to obtain a composite dispersing solution;
and S3, adding the synthetic ester insulating oil into the nano modified material prepared in the step S1, stirring the composite dispersion solution prepared in the step S2, performing ultrasonic dispersion, and performing vacuum drying to obtain the nano modified synthetic ester insulating oil.
Preferably, the preparation method at least comprises one of the following (1) to (2):
(1) The conditions for cleaning the nano modified material in the step S1 are as follows: deionized water and absolute ethyl alcohol are selected as cleaning reagents, and the nano modified material is firstly washed for 2 to 5 times by using the deionized water at normal temperature, and then is washed for 2 to 5 times by using the absolute ethyl alcohol;
(2) The temperature of the drying in the step S1 is 60-70 ℃ and the time is 12-24 h.
Preferably, the preparation method at least comprises one of the following (1) to (4):
(1) The mass ratio of the composite dispersing agent to the synthetic ester insulating oil in the step S2 is (0.1-1): 20, a step of;
(2) The stirring temperature in the step S2 is 50-60 ℃, and the stirring time is 6-8 h;
(3) The temperature of the ultrasonic dispersion in the step S3 is 40-60 ℃, and the ultrasonic dispersion time is 1-3 h;
(4) The temperature of the vacuum drying in the step S3 is 80-90 ℃ and the time is 24-48 h.
The application of the composite dispersing agent in improving the dispersion stability of the synthetic ester insulating oil.
According to the invention, sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose are selected as composite dispersant components, and the dispersant can be applied to nano modified synthetic ester insulating oil to remarkably improve the dispersion performance of the nano modified synthetic ester insulating oil. Wherein, sodium dodecyl benzene sulfonate as an anionic surfactant can increase the surface tension of an adsorption layer between the nano modified material and the synthetic ester insulating oil; the oleic acid polyoxyethylene ester is a nonionic surfactant, and ester bonds in the chemical structure of the oleic acid polyoxyethylene ester can promote the compatibility of other surfactants in the composite dispersant component and the synthetic ester insulating oil containing ester groups; the addition of the polyisobutylene succinimide can interact with other components in the composite dispersing agent, so that the agglomeration of the nano modified material is effectively reduced, and the dispersing effect is further enhanced; the hydrogen bond existing between cellulose molecules can effectively enhance the interaction force between each component in the composite dispersing agent, further enhance the stability of the composite dispersing agent, and enable each molecule to be tightly combined and adsorbed on the nano modified material together. In addition, the interaction among the components in the composite dispersing agent can also enhance the coating effect of the composite dispersing agent on the nano modified material in the nano modified synthetic ester insulating oil, so that the dispersibility of the nano modified material is increased, and the compatibility of the nano modified material and the synthetic ester insulating oil is better.
Compared with the prior art, the invention has the following beneficial effects:
(1) The composite dispersing agent disclosed by the invention can effectively avoid the agglomeration phenomenon of the nano modified synthetic ester insulating oil in the long-term storage or operation process, and compared with a single dispersing agent, the composite dispersing agent disclosed by the invention has better adsorption, wrapping and dispersing effects on nano particles in the nano modified synthetic ester insulating oil, and can effectively improve the compatibility of the nano particles in the oil, so that a more stable nano insulating oil sol system is formed.
(2) The nano modified synthetic ester insulating oil prepared by the invention has excellent dispersion stability, and provides an effective method for improving the stability and the electrical strength of the insulating oil.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the examples and comparative examples, the experimental methods used were conventional methods, and the materials, reagents and the like used were commercially available, unless otherwise specified.
Example 1
The components are as follows:
composite dispersing agent: sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose;
synthetic insulating oil: TMP triester;
nano modified material: nanometer TiO 2 ；
The content of sodium dodecyl benzene sulfonate is 10% of the total mass of the composite dispersing agent, the content of polyoxyethylene oleate is 30% of the total mass of the composite dispersing agent, the content of polyisobutylene succinimide is 10% of the total mass of the composite dispersing agent, and the content of cellulose is 50% of the total mass of the composite dispersing agent.
The preparation method comprises the following steps:
preparation of nano modified synthetic ester insulating oil:
s1, washing the nano modified material with deionized water for 3 times at normal temperature, washing the nano modified material with absolute ethyl alcohol for 3 times, washing, and then placing the nano modified material in a vacuum drying oven for vacuum drying at 60 ℃ for 24 hours for later use;
s2, preparing a composite dispersion solution:
the composite dispersing agent is dissolved in 20ml TMP triester and stirred for 6 hours at 50 ℃ by using a magnetic stirrer to form a stable and uniform solution, and a composite dispersing solution is prepared, wherein the mass ratio of the composite dispersing agent to the TMP triester is 0.3:20, a step of;
s3, adding the nano TiO prepared in the step S1 according to the adding concentration of 0.03g/L 2 Adding the mixture into TMP triester, adding the composite dispersion solution prepared in the step S2, and stirring uniformly to obtainAnd (3) performing ultrasonic dispersion on the mixed solution for 3 hours at 50 ℃ by using an ultrasonic dispersing instrument, wherein the ultrasonic power is 960W, forming a stable dispersion sol system, and drying the sol system in a vacuum drying oven for 48 hours at 90 ℃ after ultrasonic dispersion is finished, so as to obtain the nano modified synthetic ester insulating oil.
Example 2
The components are as follows:
composite dispersing agent: sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose;
synthetic insulating oil: TMP triester;
nano modified material: nano Fe 2 O 3 ；
The content of sodium dodecyl benzene sulfonate is 5% of the total mass of the composite dispersing agent, the content of polyoxyethylene oleate is 15% of the total mass of the composite dispersing agent, the content of polyisobutylene succinimide is 20% of the total mass of the composite dispersing agent, and the content of cellulose is 60% of the total mass of the composite dispersing agent.
The preparation method comprises the following steps:
preparation of nano modified synthetic ester insulating oil:
s1, washing the nano modified material for 2 times by using deionized water at normal temperature, washing the nano modified material for 2 times by using absolute ethyl alcohol, washing, and then placing the nano modified material in a vacuum drying oven for vacuum drying at 70 ℃ for 12 hours for later use;
s2, preparing a composite dispersion solution:
the composite dispersing agent is dissolved in 20ml TMP triester and stirred for 6 hours at 50 ℃ by using a magnetic stirrer to form a stable and uniform solution, and a composite dispersing solution is prepared, wherein the mass ratio of the composite dispersing agent to the TMP triester is 0.3:20, a step of;
s3, adding the nano Fe prepared in the step S1 according to the adding concentration of 0.03g/L 2 O 3 Adding the nanometer modified synthetic ester insulating oil into TMP triester, adding the composite dispersion solution prepared in the step S2, stirring uniformly, performing ultrasonic dispersion on the mixed solution for 3 hours at 40 ℃ by using an ultrasonic dispersing instrument, forming a stable dispersion sol system with ultrasonic power of 960W, and drying for 48 hours at 80 ℃ in a vacuum drying oven after ultrasonic dispersion is finished to prepare the nanometer modified synthetic ester insulating oil.
Example 3
The components are as follows:
composite dispersing agent: sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose;
synthetic insulating oil: TMP triester;
nano modified material: nano ZnO;
the content of sodium dodecyl benzene sulfonate is 20% of the total mass of the composite dispersing agent, the content of polyoxyethylene oleate is 15% of the total mass of the composite dispersing agent, the content of polyisobutylene succinimide is 10% of the total mass of the composite dispersing agent, and the content of cellulose is 55% of the total mass of the composite dispersing agent.
The preparation method comprises the following steps:
preparation of nano modified synthetic ester insulating oil:
s1, washing the nano modified material with deionized water for 5 times at normal temperature, washing the nano modified material with absolute ethyl alcohol for 5 times, washing, and then placing the nano modified material in a vacuum drying oven for vacuum drying at 60 ℃ for 24 hours for later use;
s2, preparing a composite dispersion solution:
the composite dispersing agent is dissolved in 20ml TMP triester and stirred for 8 hours at 60 ℃ by using a magnetic stirrer to form a stable and uniform solution, and a composite dispersing solution is prepared, wherein the mass ratio of the composite dispersing agent to the TMP triester is 0.3:20, a step of;
s3, adding the nano ZnO prepared in the step S1 into TMP triester according to the addition concentration of 0.03g/L, simultaneously adding the composite dispersion solution prepared in the step S2, uniformly stirring, performing ultrasonic dispersion on the mixed solution for 3 hours at 50 ℃ by using an ultrasonic dispersion instrument, forming a stable dispersion sol system with ultrasonic power of 960W, and drying for 48 hours at 90 ℃ in a vacuum drying oven after ultrasonic dispersion is finished to prepare the nano modified synthetic ester insulating oil.
Example 4
The only difference in this example compared to example 1 is that the mass ratio of the complex dispersant to the TMP triester is 0.1:20.
other components and methods of preparation reference example 1.
Example 5
Compared with example 1, the difference of this example is only that the mass ratio of the complex dispersant to the TMP triester is 1:20.
other components and methods of preparation reference example 1.
Example 6
Compared with example 1, the difference of this example is only that nano TiO 2 The concentration in TMP triester was 0.01g/L.
Other components and methods of preparation reference example 1.
Example 7
Compared with example 1, the difference of this example is only that nano TiO 2 The concentration in TMP triester was 0.15g/L.
Other components and methods of preparation reference example 1.
Example 8
The only difference between this example and example 1 is that the synthetic ester insulating oil component selected is PETP tetraester.
Other components and methods of preparation reference example 1.
Comparative example 1
The only difference in this comparative example compared to example 1 is the lack of a sodium dodecylbenzenesulfonate component in the composite dispersant.
Other components and methods of preparation reference example 1.
Comparative example 2
The only difference between this comparative example and example 1 is that sodium dodecyl sulfate was selected to replace the sodium dodecyl benzene sulfonate component of the complex dispersant.
Other components and methods of preparation reference example 1.
Comparative example 3
The only difference of this comparative example compared to example 1 is the lack of cellulosic components in the composite dispersant.
Other components and methods of preparation reference example 1.
Comparative example 4
The comparative example differs from example 1 only in that the content of sodium dodecylbenzenesulfonate is 25% of the total mass of the composite dispersant.
Other components and methods of preparation reference example 1.
Comparative example 5
The only difference in this comparative example compared to example 1 is that the content of polyisobutylene succinimide is 25% of the total mass of the composite dispersant.
Other components and methods of preparation reference example 1.
Comparative example 6
The only difference in this comparative example compared to example 1 is that the mass ratio of the complex dispersant to the TMP triester is 1.2:20.
other components and methods of preparation reference example 1.
Comparative example 7
Compared with example 1, the difference of this example is only that nano TiO 2 The concentration in TMP triester was 0.20g/L.
Other components and methods of preparation reference example 1.
Comparative example 8
The only difference between this example and example 1 is that the synthetic ester insulating oil component selected is palm oil fatty acid ester (PFAE).
Other components and methods of preparation reference example 1.
Performance testing
The nano modified synthetic ester insulating oil prepared in examples 1 to 8 and comparative examples 1 to 8 is subjected to test analysis on the Zeta potential of a nano insulating oil sample by adopting a ZS90 type Zeta potential analyzer, and the dispersion stability of the oil sample is reflected according to the absolute value of the Zeta potential, and the higher the absolute value of the Zeta potential, the better the dispersion stability of the oil sample is indicated.
The results of the performance test are shown in Table 1.
TABLE 1
From the data in table 1, it can be known that the nano modified synthetic ester insulating oil prepared by the embodiment of the invention has a higher Zeta potential absolute value, so that the nano modified synthetic ester insulating oil prepared by the invention has better dispersion stability, and meanwhile, from the experimental results of the embodiment and a blank control group, the composite dispersing agent prepared by the invention can effectively improve the dispersion stability of the synthetic ester insulating oil.
The composite dispersants of comparative examples 1 to 2 lack sodium dodecyl benzene sulfonate or sodium dodecyl sulfate is used to replace sodium dodecyl benzene sulfonate, and the dispersion stability of the finally prepared nano modified synthetic ester insulating oil is obviously reduced; the composite dispersant in comparative example 3 lacks a cellulose component, and the prepared nano modified synthetic ester insulating oil has lower dispersion stability; the mass ratio of each component in the composite dispersing agent of comparative examples 4-5 is not proper, and the prepared nano modified synthetic ester insulating oil has dispersion stability which is inferior to that of the examples; the content of the composite dispersant added in comparative example 6 is too high, and the concentration of the nano-modified material added in comparative example 7 is too high, resulting in the prepared nano-modified synthetic ester insulating oil having dispersion stability inferior to that of examples; in comparative example 8, palm oil fatty acid ester is selected to replace TMP triester, and the prepared nano modified synthetic ester insulating oil has poor dispersion stability, so that the composite dispersing agent component can effectively avoid the problems of easy aggregation and the like of nano modified materials only in the nano modified synthetic ester insulating oil prepared from TMP triester/PETP tetraester.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The composite dispersing agent is characterized by comprising the following components: sodium dodecyl benzene sulfonate, polyoxyethylene oleate, polyisobutylene succinimide and cellulose.
2. The composite dispersant according to claim 1, wherein the content of sodium dodecyl benzene sulfonate is 5 to 20% of the total mass of the composite dispersant, the content of polyoxyethylene oleate is 15 to 30% of the total mass of the composite dispersant, the content of polyisobutylene succinimide is 10 to 20% of the total mass of the composite dispersant, and the content of cellulose is 50 to 60% of the total mass of the composite dispersant.
3. The composite dispersant according to claim 2, wherein the content of sodium dodecyl benzene sulfonate is 10% of the total mass of the composite dispersant, the content of polyoxyethylene oleate is 30% of the total mass of the composite dispersant, the content of polyisobutylene succinimide is 10% of the total mass of the composite dispersant, and the content of cellulose is 50% of the total mass of the composite dispersant.
4. A method of preparing a composite dispersant as claimed in any one of claims 1 to 3, comprising the steps of: and uniformly mixing all the components to prepare the composite dispersing agent.
5. The nano modified synthetic ester insulating oil is characterized by comprising the following components: composite dispersion solution, synthetic ester insulating oil and nano modified material;
the composite dispersion solution comprising the composite dispersant as claimed in any one of claims 1 to 3.
6. The nano-modified synthetic ester insulating oil according to claim 5, comprising at least one of the following (1) to (4):
(1) The synthetic ester insulating oil is TMP triester or PETP tetraester;
(2) The concentration of the nano modified material in the synthetic ester insulating oil is 0.01 g/L-0.15 g/L;
(3) The nano modified material comprises nano TiO 2 Nano Fe 2 O 3 At least one of nano ZnO;
(4) The mass ratio of the composite dispersion solution to the synthetic ester insulating oil is 1:4.
7. a method for preparing the nano-modified synthetic ester insulating oil according to claim 6, comprising the steps of:
s1, cleaning and drying the nano modified material for later use;
s2, preparing a composite dispersion solution: dissolving the composite dispersing agent in synthetic ester insulating oil, and stirring to obtain a composite dispersing solution;
and S3, adding the synthetic ester insulating oil into the nano modified material prepared in the step S1, stirring the composite dispersion solution prepared in the step S2, performing ultrasonic dispersion, and performing vacuum drying to obtain the nano modified synthetic ester insulating oil.
8. The method according to claim 7, comprising at least one of the following (1) to (2):
(1) The conditions for cleaning the nano modified material in the step S1 are as follows: deionized water and absolute ethyl alcohol are selected as cleaning reagents, and the nano modified material is firstly washed for 2 to 5 times by using the deionized water at normal temperature, and then is washed for 2 to 5 times by using the absolute ethyl alcohol;
(2) The temperature of the drying in the step S1 is 60-70 ℃ and the time is 12-24 h.
9. The method according to claim 7, comprising at least one of the following (1) to (4):
(1) The mass ratio of the composite dispersing agent to the synthetic ester insulating oil in the step S2 is (0.1-1): 20, a step of;
(2) The stirring temperature in the step S2 is 50-60 ℃, and the stirring time is 6-8 h;
(3) The temperature of the ultrasonic dispersion in the step S3 is 40-60 ℃, and the ultrasonic dispersion time is 1-3 h;
(4) The temperature of the vacuum drying in the step S3 is 80-90 ℃ and the time is 24-48 h.
10. Use of a composite dispersant as claimed in any one of claims 1 to 3 for improving the dispersion stability of synthetic ester insulating oils.
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| JP2014039926A (en) * | 2008-07-28 | 2014-03-06 | Canon Inc | Compound, nanoparticle-dispersant complex, nanoparticle dispersion liquid, and nanoparticle-matrix material complex and method for producing compound |
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