CN114805963B - Environment-friendly nontoxic sealing gasket and preparation method thereof - Google Patents
Environment-friendly nontoxic sealing gasket and preparation method thereof Download PDFInfo
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- CN114805963B CN114805963B CN202110714332.6A CN202110714332A CN114805963B CN 114805963 B CN114805963 B CN 114805963B CN 202110714332 A CN202110714332 A CN 202110714332A CN 114805963 B CN114805963 B CN 114805963B
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 231100000252 nontoxic Toxicity 0.000 title claims abstract description 33
- 230000003000 nontoxic effect Effects 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 45
- 239000010425 asbestos Substances 0.000 claims abstract description 33
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 33
- 239000000945 filler Substances 0.000 claims abstract description 24
- 239000000853 adhesive Substances 0.000 claims abstract description 20
- 230000001070 adhesive effect Effects 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 239000013538 functional additive Substances 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 33
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 229920000459 Nitrile rubber Polymers 0.000 claims description 25
- 239000012752 auxiliary agent Substances 0.000 claims description 24
- 239000011941 photocatalyst Substances 0.000 claims description 24
- 229910021389 graphene Inorganic materials 0.000 claims description 22
- 239000002518 antifoaming agent Substances 0.000 claims description 19
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 18
- 239000005995 Aluminium silicate Substances 0.000 claims description 17
- 235000012211 aluminium silicate Nutrition 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 17
- 239000013530 defoamer Substances 0.000 claims description 15
- 239000004760 aramid Substances 0.000 claims description 13
- 229920003235 aromatic polyamide Polymers 0.000 claims description 13
- 239000008394 flocculating agent Substances 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 11
- 229920003043 Cellulose fiber Polymers 0.000 claims description 10
- 239000002557 mineral fiber Substances 0.000 claims description 10
- 239000003153 chemical reaction reagent Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 238000003756 stirring Methods 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
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 5
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical group [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 4
- 229920000388 Polyphosphate Polymers 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000007731 hot pressing Methods 0.000 claims description 4
- 239000001205 polyphosphate Substances 0.000 claims description 4
- 235000011176 polyphosphates Nutrition 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000004073 vulcanization Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 5
- 238000007906 compression Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 8
- 238000010998 test method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- -1 sericite Chemical compound 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 244000043261 Hevea brasiliensis Species 0.000 description 2
- 229920006282 Phenolic fiber Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 229960000892 attapulgite Drugs 0.000 description 2
- 239000000440 bentonite Substances 0.000 description 2
- 229910000278 bentonite Inorganic materials 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 2
- 239000010459 dolomite Substances 0.000 description 2
- 229910000514 dolomite Inorganic materials 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 229910052625 palygorskite Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 2
- 229940006186 sodium polystyrene sulfonate Drugs 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- VCUFZILGIRCDQQ-KRWDZBQOSA-N N-[[(5S)-2-oxo-3-(2-oxo-3H-1,3-benzoxazol-6-yl)-1,3-oxazolidin-5-yl]methyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C1O[C@H](CN1C1=CC2=C(NC(O2)=O)C=C1)CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F VCUFZILGIRCDQQ-KRWDZBQOSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000009519 fu-yuan Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052628 phlogopite Inorganic materials 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 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
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to the technical field of sealing, in particular to an environment-friendly nontoxic sealing gasket and a preparation method thereof. The raw materials comprise, by weight, 30-40 parts of an elastic adhesive, 10-12 parts of non-asbestos fibers, 30-50 parts of fillers and 1-10 parts of functional additives. The environment-friendly nontoxic sealing gasket prepared by the invention has good compression rebound resilience, good creep property, good sealing property and good corrosion resistance, and can fully meet the needs of customers.
Description
Technical Field
The invention relates to the technical field of sealing, in particular to an environment-friendly nontoxic sealing gasket and a preparation method thereof.
Background
For a long time, sealing gaskets using asbestos as raw materials are widely used, but with the development of society, people pay more attention to the development of human health and environmental pollution, and because asbestos is serious to environmental pollution and can cause harm to human bodies, the asbestos is gradually forbidden in recent years in various countries, and the development of an asbestos-free sealing gasket to replace the asbestos sealing gasket has become the necessary trend of current development.
The asbestos-free gasket is a sealing product with various shapes, which is made of asbestos-free sealing materials and materials such as aramid fiber, rubber and the like. However, as the factors to be considered in the design of the asbestos-free sealing gasket are much more complex than those of the traditional asbestos gasket, the performance of the prepared asbestos-free sealing gasket often cannot meet the requirements of people, and meanwhile, along with the development of society, the simple asbestos-free sealing gasket cannot meet the requirements of people, and the development of an environment-friendly non-toxic sealing gasket with the advantages of functionality, high performance and good sealing performance becomes the current urgent problem.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides an environment-friendly nontoxic sealing gasket, which comprises, by weight, 30-40 parts of an elastic adhesive, 10-12 parts of non-asbestos fibers, 30-50 parts of a filler and 1-10 parts of a functional auxiliary agent.
Preferably, the elastic adhesive comprises at least one of natural rubber, ethylene propylene diene monomer rubber, nitrile rubber, butyl rubber, chloroprene rubber, styrene-butadiene rubber, carboxylated nitrile rubber, silicone rubber and fluororubber.
Preferably, the non-asbestos fibers include at least one of aramid pulp fibers, cellulose fibers, phenolic fibers, mineral fibers, glass fibers, polyester fibers.
Preferably, the filler comprises at least one of talcum powder, calcium carbonate, kaolin, sericite, white carbon black, attapulgite powder, bentonite, nano-alumina, modified photocatalyst particles and dolomite mineral powder.
Further preferably, the filler comprises sericite, kaolin and modified photocatalyst particles.
Preferably, the average particle diameter of the modified photocatalyst particles is 18-30nm, and the specific surface area is 50-100m 2 /g。
Preferably, the functional auxiliary agent is graphene, and the graphene is modified graphene oxide.
The modifying reagent used for modifying the graphene oxide comprises at least one of sodium polystyrene sulfonate, cetyltrimethylammonium bromide and sodium dodecyl benzene sulfonate.
Preferably, the raw materials further comprise 2-5 parts of auxiliary agents, wherein the auxiliary agents comprise vulcanizing agents, flocculating agents, defoaming agents and accelerators.
The second aspect of the invention provides a preparation method of an environment-friendly nontoxic sealing gasket, which comprises the following steps:
1) Weighing the raw materials according to the weight parts, and sieving the non-asbestos fiber to obtain the non-asbestos fiber with a specific length.
2) The non-asbestos fiber, the filler and the functional auxiliary agent are centrifugally rotated at a high speed for 5-10min at a rotating speed of 200-250r/min, and then the pH regulator is added to regulate the pH value to be neutral.
3) Adding elastic adhesive, vulcanizing agent and promoter, stirring for 20-35min at 180-230r/min. And adding a flocculating agent and a defoaming agent, performing papermaking, hot pressing, drying and vulcanizing to obtain the environment-friendly nontoxic sealing gasket.
The beneficial effects are that:
1) The environment-friendly nontoxic sealing gasket prepared by the invention has high tensile strength, good compression resilience, good creep property and extremely excellent mechanical property.
2) The environment-friendly nontoxic sealing gasket prepared by the invention has the advantages of low leakage rate, good sealing performance, good corrosion resistance and good durability, and can fully meet the needs of customers.
3) The environment-friendly nontoxic sealing gasket and the preparation method thereof are environment-friendly, simple in preparation, low in price and suitable for large-scale production.
Detailed Description
In order to solve the technical problems, the first aspect of the invention provides an environment-friendly nontoxic sealing gasket, which comprises, by weight, 30-40 parts of an elastic adhesive, 10-12 parts of non-asbestos fibers, 30-50 parts of a filler and 1-10 parts of a functional auxiliary agent.
Elastic adhesive
The elastic adhesive is one of the main components of the environment-friendly nontoxic sealing gasket, and can organically combine substances in the system together to form an elastic net film by adhesion.
Preferably, the elastic adhesive comprises at least one of natural rubber, ethylene propylene diene monomer rubber, nitrile rubber, butyl rubber, chloroprene rubber, styrene-butadiene rubber, carboxylated nitrile rubber, silicone rubber and fluororubber.
Further preferably, the elastic binder comprises nitrile rubber and carboxylated nitrile rubber. The weight ratio of the nitrile rubber to the carboxylated nitrile rubber is (5-7): (3-5).
Preferably, the solid content of the nitrile rubber is more than or equal to 40 percent, and the viscosity at 25 ℃ is less than or equal to 600 mpa.s.
Preferably, the carboxylated nitrile rubber has a solids content of 40-45% and a viscosity of 80 mpa.s or less at 25 ℃.
Non-asbestos fibers
The non-asbestos fiber has great influence on the performance of the environment-friendly non-toxic sealing gasket, and the non-asbestos fiber replaces the asbestos fiber to become a reinforcing material of the environment-friendly non-toxic sealing gasket, and has the advantages of being environment-friendly, good in designability and the like.
Preferably, the non-asbestos fibers include at least one of aramid pulp fibers, cellulose fibers, phenolic fibers, mineral fibers, glass fibers, polyester fibers.
Preferably, the non-asbestos fibers include aramid pulp fibers, cellulose fibers, and mineral fibers. The weight ratio of the aramid pulp fiber, the cellulose fiber and the mineral cotton fiber is (3-8): (8-13): (15-20).
Preferably, the average length of the aramid pulp fiber is 600-900um, the average length of the cellulose fiber is 2500-2800um, and the average length of the mineral cotton fiber is 1800-2000um.
Packing material
The filler can help to improve the processability and mechanical properties of the environment-friendly nontoxic sealing gasket. The molecular movement in the material is limited by different fillers, and the types and the content of the fillers have direct influence on the performance of the environment-friendly nontoxic sealing gasket.
Preferably, the filler comprises at least one of talcum powder, calcium carbonate, kaolin, sericite, white carbon black, attapulgite powder, bentonite, nano-alumina, modified photocatalyst particles and dolomite mineral powder.
Further preferably, the filler comprises sericite, kaolin and modified photocatalyst particles. The weight ratio of the sericite to the kaolin to the modified photocatalyst particles is (1-3): (1-3): (3-8).
Preferably, the sericite has an average particle size of 800-1600 mesh.
Preferably, the kaolin has an average particle size of 2000 mesh to 6000 mesh.
Preferably, the modified photocatalyst particles are hydrophilic photocatalyst particles subjected to inorganic coating treatment.
Preferably, the average particle diameter of the modified photocatalyst particles is 18-30nm, and the specific surface area is 50-100m 2 /g。
The presence of the elastic adhesive can ensure that the gasket has more excellent elasticity, and can also cause the creep relaxation of the gasket to be degraded. According to the unexpected research, the invention discovers that the addition of the filler sericite, the kaolin and the modified photocatalyst particles can effectively ensure that the sealing gasket has good creep relaxation performance, and can also improve the mechanical property and solvent resistance of the sealing gasket, especially when the weight ratio of the sericite to the kaolin to the modified photocatalyst particles is (1-3): (1-3): (3-8) the overall properties are optimal. It is presumed that since the filler is effectively combined with the elastic adhesive, the molecular chain of the elastic adhesive cannot occupy the entire space of the original, so that the linked segments are immobilized and the orientation of the matrix polymer may be caused. Meanwhile, due to the dimensional stability of the filler, the movement of a molecular chain is limited, so that the mechanical property of the sealing gasket is improved. In addition, the average particle sizes of the different types of fillers are different, and the sealing gaskets are effectively filled by combining the fillers.
Functional auxiliary agent
The functional auxiliary agent is an sp 2 The material with the hybridized connection carbon atoms closely stacked into a single-layer two-dimensional honeycomb lattice structure has a plurality of excellent performances, and the material can be added into an environment-friendly nontoxic sealing gasket to improve the performances and has outstanding functional performances.
Preferably, the functional auxiliary agent is graphene, and the graphene is modified graphene oxide.
Preferably, the modifying agent used for modifying the graphene oxide comprises at least one of sodium polystyrene sulfonate, cetyltrimethylammonium bromide and sodium dodecyl benzene sulfonate.
Preferably, the weight ratio of the modifying reagent to the graphene oxide is 100: (3-4).
The preparation method of the modified graphene oxide comprises the following steps:
and (3) carrying out ultrasonic dispersion on 100mg of graphene oxide for 4 hours, adding a modifying reagent, stirring and mixing uniformly, carrying out ultrasonic dispersion for 30 minutes, adding 80ul,85% hydrazine hydrate and 350ul, and 28% ammonia solution, stirring and mixing uniformly, heating to 100 ℃, and reacting for 1 hour to obtain the modified graphene oxide.
The graphene can form an effective conductive path on the sealing gasket due to the unique structure of the graphene, and can improve the heat conduction performance and mechanical property of the sealing gasket, so that the application range of the sealing gasket is widened. According to the invention, unexpected researches show that the performance of the sealing gasket can be further improved by modifying graphene oxide. The positive charge of the modified graphene oxide is supposed to be effectively combined with the elastic adhesive under the electrostatic action, and the system substances are close to each other at a very small distance, so that the generation of an electric conduction network and a heat conduction network in the sealing gasket is promoted, and the performance of the sealing gasket is better than that of the sealing gasket using unmodified graphene oxide.
Auxiliary agent
Preferably, the raw materials further comprise 2-5 parts of auxiliary agents, wherein the auxiliary agents comprise vulcanizing agents, flocculating agents, defoaming agents and accelerators. The weight ratio of the vulcanizing agent, the flocculating agent, the defoaming agent and the accelerator is (0.5-2): 0.5-1: (1-1.5).
Vulcanizing agent
The vulcanizing agent of the present invention is not particularly limited, and includes, but is not limited to, at least one of sulfur, zinc oxide, magnesium oxide, and lead tetraoxide.
Flocculant
Preferably, the flocculant comprises at least one of aluminum sulfate, aluminum chloride, ferric sulfate, ferric chloride, polyaluminum sulfate, polyaluminum chloride, polyaluminum sulfate, polysilicic acid, polyphosphoric aluminum chloride, polyacrylamide and derivatives thereof, polyacrylic acid, sodium polyacrylate, calcium polyacrylate, and acrylamide grafted copolymer.
Preferably, the flocculant comprises polyphosphoric aluminum chloride and polyacrylamide and derivatives thereof. The weight ratio of the polyphosphate aluminum chloride to the polyacrylamide to the derivatives thereof is (3-5): (1-3).
Preferably, the polyacrylamide and the derivative thereof are anionic polyacrylamide.
Defoaming agent
Preferably, the defoamer includes at least one of silicone defoamer, alcohol defoamer, fatty acid ester defoamer, phosphate defoamer, mineral oil, amide defoamer, ethylene oxide and propylene oxide copolymer defoamer.
Preferably, the viscosity of the defoamer is 1000-6000cp at 25 ℃.
Accelerating agent
The accelerator of the present invention is not particularly limited, and includes at least one of accelerator TMTD, accelerator DET, accelerator DPG, accelerator M, accelerator D, accelerator BZ, accelerator PZ, accelerator ZDC, and accelerator CZ.
The second aspect of the invention provides a preparation method of an environment-friendly nontoxic sealing gasket, which comprises the following steps:
1) Weighing the raw materials according to the weight parts, and sieving the non-asbestos fiber to obtain the non-asbestos fiber with a specific length.
2) The non-asbestos fiber, the filler and the functional auxiliary agent are centrifugally rotated at a high speed for 5-10min at a rotating speed of 200-250r/min, and then the pH regulator is added to regulate the pH value to be neutral.
3) Adding elastic adhesive, vulcanizing agent and promoter, stirring for 20-35min at 180-230r/min. And adding a flocculating agent and a defoaming agent, performing papermaking, hot pressing, drying and vulcanizing to obtain the environment-friendly nontoxic sealing gasket.
The present invention will be specifically described below by way of examples. It is noted herein that the following examples are given solely for the purpose of further illustration and are not to be construed as limitations on the scope of the invention, as will be apparent to those skilled in the art in light of the foregoing disclosure.
In addition, the raw materials used are commercially available unless otherwise indicated.
Examples
Example 1
The environment-friendly nontoxic sealing gasket comprises, by weight, 32 parts of an elastic adhesive, 11 parts of non-asbestos fibers, 40 parts of a filler, 7 parts of a functional auxiliary agent and 3 parts of an auxiliary agent.
The elastic adhesive comprises nitrile rubber and carboxylated nitrile rubber. The weight ratio of the nitrile rubber to the carboxylated nitrile rubber is 6:4.
the solid content of the nitrile rubber is more than or equal to 43 percent, and the viscosity of the nitrile rubber is less than or equal to 500 mpa.s at 25 ℃. The solid content of the carboxylated nitrile rubber is 44 percent, and the viscosity is less than or equal to 50 mpa.s at 25 ℃. The nitrile rubber and carboxylated nitrile rubber are both purchased from Jiangsu yatai chemical industry limited.
The non-asbestos fibers include aramid pulp fibers, cellulosic fibers, and mineral fibers. The weight ratio of the aramid pulp fiber, the cellulose fiber and the mineral fiber is 7:10:18.
the average length of the aramid pulp fiber is 700um, the average length of the cellulose fiber is 2650um, and the average length of the mineral fiber is 1915um.
The aramid pulp fiber is purchased from the advanced manufacturing technology Co., ltd. Of the Charpy, and the cellulose fiber and the mineral fiber are both purchased from Hebei Heng Guangdong mineral products Co., ltd.
The filler comprises sericite, kaolin and modified photocatalyst particles. The weight ratio of the sericite to the kaolin to the modified photocatalyst particles is 2:2:5.
the average grain diameter of the sericite is 800-1600 meshes. The sericite is purchased from the Chuzhou-market phlogopite limited company, trade mark: KG-5. The average particle size of the kaolin is 4000 mesh. The kaolin is purchased from Changxinyi New Material Co. The modified photocatalyst particles are hydrophilic photocatalyst particles subjected to inorganic coating treatment. The average particle diameter of the modified photocatalyst particles is 25+/-5 nm, and the specific surface area is 60-90m 2 And/g. The modified photocatalyst particles are purchased from the Xuan city crystal and environmental protection new material science and technology limited company.
The functional auxiliary agent is graphene, and the graphene is modified graphene oxide. The modifying reagent used for modifying the graphene oxide is cetyl trimethyl ammonium bromide. The weight ratio of the modifying reagent to the graphene oxide is 100:3.5.
the auxiliary agent comprises a vulcanizing agent, a flocculating agent, a defoaming agent and an accelerator. The weight ratio of the vulcanizing agent, the flocculating agent, the defoaming agent and the accelerator is 0.8:0.7:0.7:1.
the vulcanizing agent is zinc oxide.
The flocculant comprises polyphosphoric aluminum chloride and polyacrylamide and derivatives thereof. The weight ratio of the polyphosphate aluminum chloride to the polyacrylamide to the derivatives thereof is 4.5:1.5. the polyphosphate aluminum chloride is purchased from the company of Fuyuan water purification materials of consolidated markets. The polyacrylamide and the derivative thereof are anionic polyacrylamide and are purchased from the strengthening of the mass nation of water purification materials.
The defoaming agent is an organosilicon defoaming agent. The organic silicon defoamer is polyether modified organic silicon defoamer. The viscosity of the polyether modified organic silicon defoamer is 2000-5000cp at 25 ℃, and the polyether modified organic silicon defoamer is purchased from Shandong Dayi chemical industry Co., ltd, and the brand is DY-ET121.
The accelerator comprises accelerator TMTD and accelerator D. The weight ratio of the accelerator TMTD to the accelerator D is 4:1.5.
the preparation method of the environment-friendly nontoxic sealing gasket comprises the following steps:
1) Weighing the raw materials according to the weight parts, and sieving the non-asbestos fiber to obtain the non-asbestos fiber with a specific length.
2) And (3) centrifuging the non-asbestos fiber, the filler and the functional auxiliary agent at a high speed for 8min at a rotating speed of 230r/min, and then adding a pH regulator to regulate the pH value to 7.
3) Adding elastic adhesive, vulcanizing agent and promoter, stirring for 30min at 200r/min. And adding a flocculating agent and a defoaming agent, performing papermaking, hot pressing, drying and vulcanizing to obtain the environment-friendly nontoxic sealing gasket.
Example 2
An environment-friendly nontoxic sealing gasket, the specific implementation mode is the same as that of the example 1, and the difference is that the weight ratio of sericite, kaolin and modified photocatalyst particles is 3:3:8.
example 3
An environment-friendly nontoxic sealing gasket has the specific implementation mode the same as that of example 1, and is characterized in that the raw materials comprise 40 parts of elastic adhesive, 12 parts of non-asbestos fiber, 50 parts of filler, 10 parts of functional auxiliary agent and 5 parts of auxiliary agent.
Example 4
An environment-friendly nontoxic sealing gasket has the same specific implementation manner as in example 1, and is different in that the defoaming agent is an organosilicon defoaming agent, and the organosilicon defoaming agent is purchased from Shandong Dayi chemical industry Co., ltd, and is of the brand DY-207A.
Comparative example 1
An environment-friendly nontoxic sealing gasket, the specific implementation mode is the same as that of the example 1, and the difference is that the graphene is graphene oxide, and the graphene oxide is purchased from the national academy of sciences of China, chemie Co., ltd., brand: TNGO-3.
Comparative example 2
An environment-friendly nontoxic sealing gasket, the specific implementation mode is the same as that of the example 1, and the difference is that the weight ratio of sericite to kaolin to modified photocatalyst particles is 2:2:0.5.
comparative example 3
An environment-friendly nontoxic sealing gasket, the specific implementation mode is the same as that of the example 1, and the difference is that the non-asbestos fiber is aramid pulp fiber.
Performance testing
1. Compression and resilience testing: the test is carried out according to GB/T20671 non-metal gasket material classification system and test method gasket material compression rate rebound rate test method.
2. Creep relaxation test: the test is carried out according to GB/T20671 'non-metal gasket material classification system and test method gasket material creep relaxation rate test method'.
3. And (3) sealing performance test: the test is carried out according to GB/T20671 non-metallic gasket material classification system and test method gasket material tightness test method.
4. Corrosion resistance test: the test is carried out according to GB/T27795-2011 non-metallic gasket corrosiveness test method.
TABLE 1 Performance test results
| Compression ratio% | Rebound% | Creep relaxation rate% | Leakage Rate ml/h | Corrosion resistance mm/a | |
| Example 1 | 15 | 69 | 28.9 | 1.8*10 -2 | 0.005 |
| Example 2 | 14 | 68 | 28.5 | 1.9*10 -2 | 0.007 |
| Example 3 | 16 | 67 | 28.2 | 2.0*10 -2 | 0.007 |
| Example 4 | 13 | 66 | 27.9 | 2.0*10 -2 | 0.009 |
| Comparative example 1 | 10 | 63 | 27.2 | 2.3*10 -2 | 0.013 |
| Comparative example 2 | 12 | 59 | 26.5 | 2.9*10 -2 | 0.015 |
| Comparative example 3 | 10 | 61 | 26.9 | 2.5*10 -2 | 0.008 |
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to equivalent embodiments without departing from the technical content of the present invention, and any simple modification, equivalent changes and alterations to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (2)
1. The environment-friendly nontoxic sealing gasket is characterized by comprising, by weight, 32 parts of an elastic adhesive, 11 parts of non-asbestos fibers, 40 parts of a filler, 7 parts of a functional auxiliary agent and 3 parts of an auxiliary agent;
the elastic adhesive comprises nitrile rubber and carboxylated nitrile rubber; the weight ratio of the nitrile rubber to the carboxylated nitrile rubber is 6:4, a step of;
the solid content of the nitrile rubber is more than or equal to 43 percent, and the viscosity at 25 ℃ is less than or equal to 500 mpa.s; the solid content of the carboxylated nitrile rubber is 44%, and the viscosity is less than or equal to 50 mpa.s at 25 ℃;
the non-asbestos fibers include aramid pulp fibers, cellulosic fibers, and mineral fibers; the weight ratio of the aramid pulp fiber, the cellulose fiber and the mineral fiber is 7:10:18;
the average length of the aramid pulp fiber is 700um, the average length of the cellulose fiber is 2650um, and the average length of the mineral fiber is 1915um;
the filler comprises sericite, kaolin and modified photocatalyst particles; the weight ratio of the sericite to the kaolin to the modified photocatalyst particles is 2:2:5, a step of;
the average grain diameter of the sericite is 800-1600 meshes;
the average particle size of the kaolin is 4000 meshes;
the modified photocatalyst particles are hydrophilic photocatalyst particles subjected to inorganic coating treatment; the average particle diameter of the modified photocatalyst particles is 25+/-5 nm, and the specific surface area is 60-90m 2 /g；
The functional auxiliary agent is graphene, and the graphene is modified graphene oxide; the modifying reagent used for modifying the graphene oxide is cetyl trimethyl ammonium bromide; the weight ratio of the modifying reagent to the graphene oxide is 100:3.5;
the auxiliary agent comprises a vulcanizing agent, a flocculating agent, a defoaming agent and an accelerator; the weight ratio of the vulcanizing agent, the flocculating agent, the defoaming agent and the accelerator is 0.8:0.7:0.7:1, a step of;
the vulcanizing agent is zinc oxide;
the flocculant comprises polyphosphoric aluminum chloride and polyacrylamide and derivatives thereof; the weight ratio of the polyphosphate aluminum chloride to the polyacrylamide to the derivatives thereof is 4.5:1.5;
the defoaming agent is an organosilicon defoaming agent; the organic silicon defoamer is a polyether modified organic silicon defoamer; the viscosity of the polyether modified organosilicon defoamer is 2000-5000cp at 25 ℃;
the accelerator comprises an accelerator TMTD and an accelerator D; the weight ratio of the accelerator TMTD to the accelerator D is 4:1.5.
2. a method of making an environmentally friendly, non-toxic sealing gasket according to claim 1, comprising the steps of:
1) Weighing the raw materials according to the parts by weight, and sieving the non-asbestos fibers to obtain non-asbestos fibers with specific lengths;
2) Centrifuging non-asbestos fiber, filler and functional additive at high speed for 5-10min at 200-250r/min, and adding pH regulator to adjust pH to neutrality;
3) Adding an elastic adhesive, a vulcanizing agent and an accelerator, stirring for 20-35min at the rotating speed of 180-230r/min, adding a flocculating agent and a defoaming agent, and performing shoveling, hot pressing, drying and vulcanization to obtain the environment-friendly nontoxic sealing gasket.
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| WO1996031569A1 (en) * | 1995-04-05 | 1996-10-10 | Nisshinbo Industries, Inc. | Gasket for compressor of refrigerator or the like |
| CN1557865A (en) * | 2004-01-13 | 2004-12-29 | 上海大学 | Process for preparation formation of nonasbestos fibre enhanced latex sealing plate |
| CN106867448A (en) * | 2016-12-29 | 2017-06-20 | 铜陵市金利电子有限公司 | A kind of manufacture craft without asbestos seal gasket |
| CN110183749A (en) * | 2019-07-11 | 2019-08-30 | 安徽理工大学 | A kind of graphene enhancing rubber packing material and preparation method thereof |
| CN110818971A (en) * | 2019-12-09 | 2020-02-21 | 王娟娟 | Sealing gasket and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014052238A1 (en) * | 2012-09-25 | 2014-04-03 | Weatherford/Lamb, Inc. | High water and brine swell elastomeric compositions and method for making and using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996031569A1 (en) * | 1995-04-05 | 1996-10-10 | Nisshinbo Industries, Inc. | Gasket for compressor of refrigerator or the like |
| CN1557865A (en) * | 2004-01-13 | 2004-12-29 | 上海大学 | Process for preparation formation of nonasbestos fibre enhanced latex sealing plate |
| CN106867448A (en) * | 2016-12-29 | 2017-06-20 | 铜陵市金利电子有限公司 | A kind of manufacture craft without asbestos seal gasket |
| CN110183749A (en) * | 2019-07-11 | 2019-08-30 | 安徽理工大学 | A kind of graphene enhancing rubber packing material and preparation method thereof |
| CN110818971A (en) * | 2019-12-09 | 2020-02-21 | 王娟娟 | Sealing gasket and preparation method thereof |
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