CN109354778A - A kind of rubber packing material preparation method of the modified montmorillonoid containing nano-magnetic powder - Google Patents
A kind of rubber packing material preparation method of the modified montmorillonoid containing nano-magnetic powder Download PDFInfo
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- CN109354778A CN109354778A CN201811090874.5A CN201811090874A CN109354778A CN 109354778 A CN109354778 A CN 109354778A CN 201811090874 A CN201811090874 A CN 201811090874A CN 109354778 A CN109354778 A CN 109354778A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 27
- 239000000463 material Substances 0.000 title claims abstract description 27
- 239000005060 rubber Substances 0.000 title claims abstract description 27
- 238000012856 packing Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 22
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 16
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 40
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 15
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 15
- 239000006229 carbon black Substances 0.000 claims abstract description 10
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 13
- 238000009210 therapy by ultrasound Methods 0.000 claims description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000007822 coupling agent Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 9
- 235000019241 carbon black Nutrition 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 229920002943 EPDM rubber Polymers 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 claims description 5
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 5
- 239000004359 castor oil Substances 0.000 claims description 5
- 235000019438 castor oil Nutrition 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 5
- 229920005610 lignin Polymers 0.000 claims description 5
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 238000004073 vulcanization Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000000527 sonication Methods 0.000 claims description 3
- -1 maleic acids Acid anhydride Chemical class 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 12
- 238000007789 sealing Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000014759 maintenance of location Effects 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 2
- 238000009826 distribution Methods 0.000 abstract description 2
- 230000005389 magnetism Effects 0.000 abstract description 2
- 239000013077 target material Substances 0.000 abstract description 2
- 238000005054 agglomeration Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 12
- 238000012360 testing method Methods 0.000 description 8
- 239000003566 sealing material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical class O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229940056319 ferrosoferric oxide Drugs 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/14—Gas barrier composition
Abstract
The invention discloses a kind of rubber packing material preparation methods of modified montmorillonoid containing nano-magnetic powder, the rubber packing material of preparation tensile resistance with higher and tear resistance, simultaneously, its air transmission coefficient is lower, sealing performance is preferable, meanwhile the tensile strength of present invention gained rubber packing material is in H2During S solution corrosion, reduced with slower speed, the retention rate after 20d is still 98% or so, and corrosion resistance is superior.Nanoscale ferroferric oxide powder is modified using polyacrylic acid, on the one hand the agglomeration of nano ferriferrous oxide powder is improved, it can be evenly distributed in rubber substrate, simultaneously because it has magnetism, it can influence the distribution of carbon black, making carbon black, dispersion performance improves under the influence of a magnetic field, to significantly improve the mechanical property and corrosion resistance of target material.
Description
Technical field
The invention belongs to sealing material technical field, the rubber seal material of especially a kind of modified montmorillonoid containing nano-magnetic powder
Preparation method for material.
Background technique
The application life of chemical pump, other than material and structure that pump uses itself, the choosing of sealing material structure and form
It selects also most important.Sealing material is to ensure that production is normal and carries out in an orderly manner, reduce maintenance and maintenance cost, reduce material wave
Take, avoid the key of environmental pollution.Though EPT rubber packing material has superior mechanical performance and ageing-resistant performance etc.,
But in use, since the influence of the environmental factors such as light, heat, oxygen and corrosive medium still will cause the gradually bad of performance
Change, sealing material is caused to fail.
Therefore, ethylene propylene diene rubber is modified, to enhance its mechanical performance, sealing performance and corrosion resistance, tool
There is vital meaning.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of mechanical performance, sealing performance and corrosion resistance is good contains
The rubber packing material preparation method of nano-magnetic powder modified montmorillonoid.
The invention is realized by the following technical scheme:
A kind of rubber packing material preparation method of the modified montmorillonoid containing nano-magnetic powder, which comprises the following steps:
(1) 5-10 part ferroferric oxide powder in parts by weight is placed in the acetone of 5-10 times of its volume, and is heated to boiling
It rises, stirring 10-15min is boiled at 400-430rpm, 80-84 DEG C is then cooled to, and 1-2 parts of lignin are added, continues to stir
After mixing 10-20min, filtering, and dried at 50-55 DEG C；
(2) ferroferric oxide powder obtained by step (1) is modified using polyacrylic acid, obtains improved ferroferric oxide powder
End；
(3) 10-15 parts of montmorillonites are added in the deionized water of 10-30 times of its volume, the super of 2-4KHz is utilized at 40-43 DEG C
Then improved ferroferric oxide powder obtained by step (2) is added in sonication 20-30min, be transferred to instead after continuing ultrasound 10-20min
It answers in kettle, under the stirring of 200-300rpm revolving speed, adjustment reactor pressure is 0.5-1.5MPa, and temperature is 130-140 DEG C, reaction
Then temperature of reaction kettle is down to 70-75 DEG C by 4-5h, pressure is adjusted to -0.08~-0.1MPa, cold after the reaction was continued 1-2h
But, gains are dried in vacuo by air inlet to normal temperature and pressure, filtering at 105-110 DEG C；
(4) 80-120 parts of ethylene propylene diene rubbers and step (2) gains are added in mixer, add 3-5 parts of maleic acids
Acid anhydride carries out mixing 10-20min at 120-125 DEG C, then be added 4-6 parts of castor oil, 5-10 parts of carbon blacks, 1-3 parts of coupling agents,
4-5 parts of diphenylguanidine TDM continue to be kneaded 30-40min, and discharging is logical 3-5 times thin at 60-65 DEG C then through two-roll mill,
Then vulcanization 9-11min, cooling and demolding are carried out.
Further, the partial size of step (1) described ferroferric oxide powder is 5-50nm.
Further, step (2) the improved ferroferric oxide powder the preparation method comprises the following steps: 4-5 parts of polyacrylic acid are molten
In the dehydrated alcohol of its 3-5 times of volume, ferroferric oxide powder obtained by step (1) is then added, using super at 60-70 DEG C
After sonication 30-40min, under the conditions of 75-76 DEG C, 400-500rpm, 8-10h is reacted, is then cooled down, filtered, and with anhydrous
Ethanol washing gains 3-4 times are placed at 90-100 DEG C and are drying to obtain.
Further, step (3) montmorillonite is sodium-based montmorillonite.
Further, step (4) curing temperature is 140-150 DEG C, sulfide stress 8-10MPa.
Further, step (4) coupling agent is γ-(2,3- glycidoxy) propyl trimethoxy silicane.
Further, the ultrasonic treatment condition is 200-230Hz.
Beneficial effects of the present invention: rubber packing material prepared by the present invention tensile resistance with higher and tear-proof
Performance, meanwhile, air transmission coefficient is lower, and sealing performance is preferable, meanwhile, the tensile strength of present invention gained rubber packing material exists
H2During S solution corrosion, reduced with slower speed, the retention rate after 20d is still 98% or so, and corrosion resistance is superior.
Nanoscale ferroferric oxide powder is modified using polyacrylic acid, on the one hand improves the group of nano ferriferrous oxide powder
Poly- phenomenon can be evenly distributed in rubber substrate, simultaneously because it has magnetism, can influence the distribution of carbon black,
Making carbon black, dispersion performance improves under the influence of a magnetic field, to significantly improve the mechanical property and corrosion resistance of target material
Energy；On the other hand, after using polyacrylic acid modified ferroso-ferric oxide, polyacrylic acid anion is wrapped up on ferroso-ferric oxide surface,
It can make to be wrapped in ferriferrous oxide nano grain by the positive electric attraction of montmorillonite interlayer cation when acting on sodium-based montmorillonite
The polyacrylic acid anion of son enters between cheating engaging layer, to open cheating engaging layer spacing significantly, forms exfoliated receive
Nano composite material, lamella are dispersed in rubber matrix, the internal penetration of gas, liquid in sealing material are hindered, to mention
The high sealing performance of sealing material.
Specific embodiment
Illustrate the present invention with specific embodiment below, but is not limitation of the present invention.
Embodiment 1
A kind of rubber packing material preparation method of the modified montmorillonoid containing nano-magnetic powder, which comprises the following steps:
(1) 5 parts of ferroferric oxide powders in parts by weight are placed in the acetone of 5 times of its volume, and are heated to boiling,
Stirring 10min is boiled under 400rpm, is then cooled to 80 DEG C, and 1 part of lignin is added, and is continued after stirring 10min, filtering, and
It is dried at 50 DEG C；
(2) ferroferric oxide powder obtained by step (1) is modified using polyacrylic acid, obtains improved ferroferric oxide powder
End；
(3) 10 parts of montmorillonites are added in the deionized water of 10 times of its volume, the ultrasonic treatment of 2KHz is utilized at 40 DEG C
Then improved ferroferric oxide powder obtained by step (2) is added in 20min, be transferred in reaction kettle after continuing ultrasound 10min,
Under the stirring of 200rpm revolving speed, adjustment reactor pressure is 0.5MPa, and temperature is 130 DEG C, reacts 4h, then drops temperature of reaction kettle
To 70 DEG C, pressure is adjusted to -0.08MPa, after the reaction was continued 1h, cooling, air inlet to normal temperature and pressure, and filtering, by gains 105
It is dried in vacuo at DEG C；
(4) 80 parts of ethylene propylene diene rubbers and step (2) gains are added in mixer, add 3 parts of maleic anhydrides,
Mixing 10min is carried out at 120 DEG C, and 4 parts of castor oil, 5 parts of carbon blacks, 1 part of coupling agent, 4 parts of diphenylguanidine TDM are then added, continue to mix
30min is refined, discharging is thin 3 times logical at 60 DEG C then through two-roll mill, then carries out vulcanization 9min, cooling and demolding.
Further, the partial size of step (1) described ferroferric oxide powder is 10nm.
Further, step (2) the improved ferroferric oxide powder the preparation method comprises the following steps: 4 parts of polyacrylic acid are dissolved in
In the dehydrated alcohol of its 3 times of volumes, ferroferric oxide powder obtained by step (1) is then added, ultrasonic treatment is utilized at 65 DEG C
After 35min, under the conditions of 75 DEG C, 400rpm, 8h is reacted, is then cooled down, filtered, and washed gains 3 times with dehydrated alcohol, set
It is drying to obtain at 90 DEG C.
Further, step (3) montmorillonite is sodium-based montmorillonite.
Further, step (4) curing temperature is 140 DEG C, sulfide stress 8MPa.
Further, step (4) coupling agent is γ-(2,3- glycidoxy) propyl trimethoxy silicane.
Further, the ultrasonic treatment condition is 200Hz.
Embodiment 2
A kind of rubber packing material preparation method of the modified montmorillonoid containing nano-magnetic powder, which comprises the following steps:
(1) 8 parts of ferroferric oxide powders in parts by weight are placed in the acetone of 7 times of its volume, and are heated to boiling,
Stirring 12min is boiled under 420rpm, is then cooled to 82 DEG C, and 2 parts of lignin are added, and is continued after stirring 15min, filtering, and
It is dried at 53 DEG C；
(2) ferroferric oxide powder obtained by step (1) is modified using polyacrylic acid, obtains improved ferroferric oxide powder
End；
(3) 12 parts of montmorillonites are added in the deionized water of 20 times of its volume, the ultrasonic treatment of 3KHz is utilized at 41 DEG C
Then improved ferroferric oxide powder obtained by step (2) is added in 25min, be transferred in reaction kettle after continuing ultrasound 15min,
Under the stirring of 250rpm revolving speed, adjustment reactor pressure is 1.0MPa, and temperature is 135 DEG C, reacts 5h, then drops temperature of reaction kettle
To 72 DEG C, pressure is adjusted to -0.09MPa, after the reaction was continued 2h, cooling, air inlet to normal temperature and pressure, and filtering, by gains 107
It is dried in vacuo at DEG C；
(4) 90 parts of ethylene propylene diene rubbers and step (2) gains are added in mixer, add 4 parts of maleic anhydrides,
Mixing 15min is carried out at 122 DEG C, and 5 parts of castor oil, 7 parts of carbon blacks, 2 parts of coupling agents, 5 parts of diphenylguanidine TDM are then added, continue to mix
35min is refined, discharging is thin 4 times logical at 62 DEG C then through two-roll mill, then carries out vulcanization 10min, cooling and demolding.
Further, the partial size of step (1) described ferroferric oxide powder is 20nm.
Further, step (2) the improved ferroferric oxide powder the preparation method comprises the following steps: 5 parts of polyacrylic acid are dissolved in
In the dehydrated alcohol of its 4 times of volumes, ferroferric oxide powder obtained by step (1) is then added, ultrasonic treatment is utilized at 65 DEG C
After 35min, under the conditions of 76 DEG C, 450rpm, 9h is reacted, is then cooled down, filtered, and washed gains 4 times with dehydrated alcohol, set
It is drying to obtain at 95 DEG C.
Further, step (3) montmorillonite is sodium-based montmorillonite.
Further, step (4) curing temperature is 145 DEG C, sulfide stress 9MPa.
Further, step (4) coupling agent is γ-(2,3- glycidoxy) propyl trimethoxy silicane.
Further, the ultrasonic treatment condition is 220Hz.
Embodiment 3
A kind of rubber packing material preparation method of the modified montmorillonoid containing nano-magnetic powder, which comprises the following steps:
(1) 10 parts of ferroferric oxide powders in parts by weight are placed in the acetone of 10 times of its volume, and are heated to boiling,
Stirring 15min is boiled under 430rpm, is then cooled to 84 DEG C, and 2 parts of lignin are added, and is continued after stirring 20min, filtering, and
It is dried at 55 DEG C；
(2) ferroferric oxide powder obtained by step (1) is modified using polyacrylic acid, obtains improved ferroferric oxide powder
End；
(3) 15 parts of montmorillonites are added in the deionized water of 30 times of its volume, the ultrasonic treatment of 4KHz is utilized at 43 DEG C
Then improved ferroferric oxide powder obtained by step (2) is added in 30min, be transferred in reaction kettle after continuing ultrasound 20min,
Under the stirring of 300rpm revolving speed, adjustment reactor pressure is 1.5MPa, and temperature is 140 DEG C, reacts 5h, then drops temperature of reaction kettle
To 75 DEG C, pressure is adjusted to -0.1MPa, after the reaction was continued 2h, cooling, air inlet to normal temperature and pressure, and filtering, by gains 110
It is dried in vacuo at DEG C；
(4) 120 parts of ethylene propylene diene rubbers and step (2) gains are added in mixer, add 5 parts of maleic anhydrides,
Mixing 20min is carried out at 125 DEG C, 6 parts of castor oil, 10 parts of carbon blacks, 3 parts of coupling agents, 5 parts of diphenylguanidine TDM are then added, and is continued
It is kneaded 40min, discharging is thin 5 times logical at 65 DEG C then through two-roll mill, then carries out vulcanization 11min, cooling and demolding is
It can.
Further, the partial size of step (1) described ferroferric oxide powder is 50nm.
Further, step (2) the improved ferroferric oxide powder the preparation method comprises the following steps: 5 parts of polyacrylic acid are dissolved in
In the dehydrated alcohol of its 5 times of volumes, ferroferric oxide powder obtained by step (1) is then added, ultrasonic treatment is utilized at 70 DEG C
After 40min, under the conditions of 76 DEG C, 500rpm, 10h is reacted, is then cooled down, filtered, and washed gains 4 times with dehydrated alcohol,
It is placed at 100 DEG C and is drying to obtain.
Further, step (3) montmorillonite is sodium-based montmorillonite.
Further, step (4) curing temperature is 150 DEG C, sulfide stress 10MPa.
Further, step (4) coupling agent is γ-(2,3- glycidoxy) propyl trimethoxy silicane.
Further, the ultrasonic treatment condition is 230Hz.
Comparative example 1
This comparative example is omitted step (2) to the modifying processing step of ferroferric oxide powder, removes compared to embodiment 2
Method and step except this is all the same.
Comparative example 2
This comparative example is omitted step (3) to the processing step of montmorillonite, is added directly into rubber compared to embodiment 2
In substrate, method and step in addition to this is all the same.
Comparative example 3
The addition of carbon black is omitted compared to embodiment 2 in this comparative example, and method and step in addition to this is all the same.
Performance test:
Tensile strength test: it is tested according to GB/T 528-2009 standard.
Tearing strength test: it is tested according to GB/T 529-2008 standard.
Gas permeability coefficient test: it is tested according to GB/T 1038-2000 standard.
Test result is as shown in table 1:
Table 1
| Tensile strength (MPa) | Tearing strength (MPa) | Air transmission coefficient cm3·cm/cm2·s·Pa | |
| Embodiment 1 | 18.5 | 85 | 2.15×10-13 |
| Embodiment 2 | 20.8 | 87 | 2.12×10-13 |
| Embodiment 3 | 17.2 | 88 | 2.13×10-13 |
| Comparative example 1 | 10.8 | 42 | 5.27×10-13 |
| Comparative example 2 | 11.3 | 38 | 6.35×10-13 |
| Comparative example 3 | 10.7 | 46 | 5.21×10-13 |
As can be seen from Table 1, rubber packing material prepared by the present invention tensile resistance with higher and tear resistance, together
When, air transmission coefficient is lower, and sealing performance is preferable.
Corrosion resistance test: 0.04% H will be put into after the test tensile strength of sealing material obtained by each group2In S solution,
Corroded at normal temperature, etching time is respectively 5d, 10d, 15d, 20d, then takes out sample, tests its drawing again after dry
Stretch intensity, tensile strength calculated retention rate, to characterize the corrosion resistance of sample.Test result is as shown in table 2:
Table 2
| 5d | 10d | 15d | 20d | |
| Embodiment 1 | 99.8 | 99.5 | 98.8 | 98.0 |
| Embodiment 2 | 99.9 | 99.6 | 98.9 | 98.1 |
| Embodiment 3 | 99.9 | 99.5 | 98.9 | 98.2 |
| Comparative example 1 | 97.2 | 93.7 | 90.5 | 85.7 |
| Comparative example 2 | 97.0 | 93.3 | 89.4 | 85.1 |
| Comparative example 3 | 97.3 | 94.1 | 91.2 | 86.3 |
As can be seen from Table 2, the tensile strength of rubber packing material prepared by the present invention is in H2During S solution corrosion, with compared with
Slow speed reduces, and the retention rate after 20d is 98% or so, and corrosion resistance is superior.
Claims (7)
1. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder, which comprises the following steps:
(1) 5-10 part ferroferric oxide powder in parts by weight is placed in the acetone of 5-10 times of its volume, and is heated to boiling
It rises, stirring 10-15min is boiled at 400-430rpm, 80-84 DEG C is then cooled to, and 1-2 parts of lignin are added, continues to stir
After mixing 10-20min, filtering, and dried at 50-55 DEG C；
(2) ferroferric oxide powder obtained by step (1) is modified using polyacrylic acid, obtains improved ferroferric oxide powder
End；
(3) 10-15 parts of montmorillonites are added in the deionized water of 10-30 times of its volume, the super of 2-4KHz is utilized at 40-43 DEG C
Then improved ferroferric oxide powder obtained by step (2) is added in sonication 20-30min, be transferred to instead after continuing ultrasound 10-20min
It answers in kettle, under the stirring of 200-300rpm revolving speed, adjustment reactor pressure is 0.5-1.5MPa, and temperature is 130-140 DEG C, reaction
Then temperature of reaction kettle is down to 70-75 DEG C by 4-5h, pressure is adjusted to -0.08~-0.1MPa, cold after the reaction was continued 1-2h
But, gains are dried in vacuo by air inlet to normal temperature and pressure, filtering at 105-110 DEG C；
(4) 80-120 parts of ethylene propylene diene rubbers and step (2) gains are added in mixer, add 3-5 parts of maleic acids
Acid anhydride carries out mixing 10-20min at 120-125 DEG C, then be added 4-6 parts of castor oil, 5-10 parts of carbon blacks, 1-3 parts of coupling agents,
4-5 parts of diphenylguanidine TDM continue to be kneaded 30-40min, and discharging is logical 3-5 times thin at 60-65 DEG C then through two-roll mill,
Then vulcanization 9-11min, cooling and demolding are carried out.
2. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder according to claim 1, special
Sign is that the partial size of step (1) described ferroferric oxide powder is 5-50nm.
3. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder according to claim 1, special
Sign is, step (2) the improved ferroferric oxide powder the preparation method comprises the following steps: 4-5 parts of polyacrylic acid are dissolved in its 3-5 times of body
In long-pending dehydrated alcohol, ferroferric oxide powder obtained by step (1) is then added, ultrasonic treatment 30- is utilized at 60-70 DEG C
After 40min, under the conditions of 75-76 DEG C, 400-500rpm, 8-10h is reacted, is then cooled down, filtered, and wash institute with dehydrated alcohol
It obtains object 3-4 times, is placed at 90-100 DEG C and is drying to obtain.
4. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder according to claim 1, special
Sign is that step (3) montmorillonite is sodium-based montmorillonite.
5. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder according to claim 1, special
Sign is that step (4) curing temperature is 140-150 DEG C, sulfide stress 8-10MPa.
6. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder according to claim 1, special
Sign is that step (4) coupling agent is γ-(2,3- glycidoxy) propyl trimethoxy silicane.
7. a kind of rubber packing material preparation method of modified montmorillonoid containing nano-magnetic powder according to claim 3, special
Sign is that the ultrasonic treatment condition is 200-230Hz.
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