CN116769218B - Sodium bicarbonate modification method and application thereof - Google Patents
Sodium bicarbonate modification method and application thereof Download PDFInfo
- Publication number
- CN116769218B CN116769218B CN202310711239.9A CN202310711239A CN116769218B CN 116769218 B CN116769218 B CN 116769218B CN 202310711239 A CN202310711239 A CN 202310711239A CN 116769218 B CN116769218 B CN 116769218B
- Authority
- CN
- China
- Prior art keywords
- sodium bicarbonate
- parts
- stirring
- modified sodium
- alumina
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 title claims abstract description 74
- 229910000030 sodium bicarbonate Inorganic materials 0.000 title claims abstract description 26
- 235000017557 sodium bicarbonate Nutrition 0.000 title claims abstract description 26
- 238000002715 modification method Methods 0.000 title claims abstract description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000004088 foaming agent Substances 0.000 claims abstract description 41
- 238000003756 stirring Methods 0.000 claims abstract description 36
- 238000001035 drying Methods 0.000 claims abstract description 18
- 230000032683 aging Effects 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 46
- 235000019441 ethanol Nutrition 0.000 claims description 34
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 28
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 16
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical class [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 15
- DDXLVDQZPFLQMZ-UHFFFAOYSA-M dodecyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCC[N+](C)(C)C DDXLVDQZPFLQMZ-UHFFFAOYSA-M 0.000 claims description 15
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 14
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 14
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 14
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 14
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 13
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 10
- JGDITNMASUZKPW-UHFFFAOYSA-K aluminium trichloride hexahydrate Chemical compound O.O.O.O.O.O.Cl[Al](Cl)Cl JGDITNMASUZKPW-UHFFFAOYSA-K 0.000 claims description 10
- 229940009861 aluminum chloride hexahydrate Drugs 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 235000011132 calcium sulphate Nutrition 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005187 foaming Methods 0.000 abstract description 17
- 238000000354 decomposition reaction Methods 0.000 abstract description 7
- 230000009965 odorless effect Effects 0.000 abstract description 3
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 30
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 30
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 18
- 229910000019 calcium carbonate Inorganic materials 0.000 description 9
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical group NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000004604 Blowing Agent Substances 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 210000004027 cell Anatomy 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000002411 thermogravimetry Methods 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000002666 chemical blowing agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000011157 hong shi Nutrition 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
- 238000002137 ultrasound extraction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0028—Use of organic additives containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Emergency Medicine (AREA)
- Inorganic Chemistry (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention relates to a sodium bicarbonate modification method and application thereof, wherein the sodium bicarbonate modification method specifically comprises the following steps: s21: preparing alumina-silica sol; s22: adding 50% ethanol solution and sodium bicarbonate into the alumina-silica sol obtained in the step S21, stirring for 2-3h, aging for 24-36h, and drying at 40 ℃ for 6-8h to obtain modified sodium bicarbonate; in the step S22, the weight part ratio of the ethanol solution with the volume fraction of 50 percent, sodium bicarbonate and alumina-silica sol is 20:10:1. The decomposition product of the high-efficiency EVA foaming agent prepared from the modified sodium bicarbonate is nontoxic and odorless, green and environment-friendly, and has high foaming rate.
Description
The invention is a divisional application of Chinese patent application No. 202210791738.9.
Technical Field
The invention relates to the technical field of modified sodium bicarbonate, in particular to a modification method and application of sodium bicarbonate.
Background
A blowing agent is a substance that imparts a cellular structure to a polymer matrix or metal melt, thereby imparting a particular property to the polymer or metal. Hancock et al, 1846 produced sponges with physical blowing agents, and opened the line of industrial application of blowing agents. From the advent of simple physical and inorganic chemical blowing agents, blowing agents have evolved to a wide variety of organic and composite blowing agents, and their application areas have been expanding. The foaming agent drives the rapid development of foaming products, and the foaming products have excellent properties of heat insulation, sound insulation, light weight, small density, strong elasticity, compressibility and the like, and have very wide application, namely, military, automobile, aviation, building heat preservation, exploration, furniture, packaging, medical equipment, dyeing and finishing, refrigerator insulation layers and can be seen everywhere.
Ethylene-vinyl acetate copolymer (EVA) is a rubber-like thermoplastic with excellent flexibility, low temperature brain flexibility, elasticity, stress crack resistance, and good plasticity, processability, compared to polyethylene, and thus is widely used. Therefore, the inventor considers that research on an environment-friendly and odorless EVA foaming material has very important significance.
Disclosure of Invention
In view of the above, the invention aims to provide a high-efficiency EVA foaming agent and a preparation method thereof, and a decomposition product is nontoxic and odorless, green and environment-friendly and has high foaming rate.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The high-efficiency EVA foaming agent comprises the following components in parts by weight: 60-80 parts of modified sodium bicarbonate, 2-4 parts of hydroxypropyl methyl cellulose, 5-8 parts of dodecyl trimethyl ammonium chloride, 20-30 parts of foaming agent, 1-2 parts of calcium sulfate, 60-80 parts of ethanol solution with the volume fraction of 50% and 1-2 parts of zinc stearate.
Preferably, 70 parts of modified sodium bicarbonate, 3 parts of hydroxypropyl methyl cellulose, 6 parts of dodecyl trimethyl ammonium chloride, 25 parts of foaming agent, 1.5 parts of calcium sulfate, 70 parts of ethanol solution with the volume fraction of 50% and 1.5 parts of zinc stearate.
Preferably, the foaming agent is calcium carbonate.
The invention also provides a preparation method of the high-efficiency EVA foaming agent, which comprises the following steps:
s1: uniformly mixing hydroxypropyl methylcellulose, dodecyl trimethyl ammonium chloride, calcium sulfate, ethanol solution with the volume fraction of 50% and zinc stearate, and stirring for 20-30min;
s2: and then adding the modified sodium bicarbonate and the foaming agent into the mixture obtained in the step S1, and stirring and drying to obtain the high-efficiency EVA foaming agent.
Preferably, the preparation method of the modified sodium bicarbonate in the step S2 specifically comprises the following steps:
S21: preparing alumina-silica sol;
S22: adding 50% ethanol solution and sodium bicarbonate into the alumina-silica sol obtained in the step S21, stirring for 2-3h, aging for 24-36h, and drying at 40 ℃ for 6-8h to obtain the modified sodium bicarbonate.
Preferably, in step S22, the weight part ratio of the ethanol solution with the volume fraction of 50%, sodium bicarbonate and alumina-silica sol is 20:10:1.
Preferably, the preparation method of the alumina-silica sol in the step S21 specifically includes the following steps:
s23, mixing aluminum chloride hexahydrate, ammonia water with the volume fraction of 75%, deionized water and ethanol solution with the volume fraction of 75%, and heating and stirring at 80 ℃ for 1-2 hours to obtain alumina sol;
mixing tetraethoxysilane with absolute ethyl alcohol to obtain a mixed solution, adding a sulfuric acid solution with the volume fraction of 30% into the mixed solution, adjusting the pH value to 6-7, and stirring for 1-2h to obtain silica sol;
And S24, adding the silica sol obtained in the step S23 into the alumina sol obtained in the step S23, and stirring for 12-14h to obtain the alumina-silica sol.
Preferably, in the step S23, the weight ratio of the aluminum chloride hexahydrate, the ammonia water, the deionized water and the ethanol solution is 1:5:10:15.
Preferably, in the step S23, the weight ratio of the tetraethoxysilane, the absolute ethyl alcohol and the sulfuric acid solution is 1:10:3.
Preferably, the drying temperature in step S2 is 25-30deg.C, and the drying time is 24-36h.
The sodium bicarbonate is coated on the surface of the gel, the high compression strength of the gel ensures the dimensional stability of foaming molding, further stabilizes the cell structure and prevents the uniformity of cells from being damaged, so that the density of cells is uniform, meanwhile, the sodium bicarbonate is coated on the surface of the gel to increase the specific surface area, when the foaming agent is used for foaming, the stress concentration can be effectively reduced, the gas load effect generated by the sodium bicarbonate is dispersed and buffered, the defect of partial foaming load is made up, the interface of the gel is enhanced, the sodium bicarbonate is coated on the surface of the gel to form an interface enhancement body, the adhesive force of the gas generated by the sodium bicarbonate can be improved, and the gas generated by the sodium bicarbonate is attached on the surface, so that the foaming multiplying power is improved.
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 addition, the raw materials and the equipment according to the invention are commercially available, and are not listed, wherein the raw materials according to the invention are commercially available, and are well known to those skilled in the art, for example, dodecyl trimethyl ammonium chloride is a commercially available colloid.
Example 1:
The high-efficiency EVA foaming agent comprises the following components in parts by weight: 80 parts of modified sodium bicarbonate, 4 parts of hydroxypropyl methyl cellulose, 8 parts of dodecyl trimethyl ammonium chloride, 30 parts of calcium carbonate (foaming agent), 2 parts of calcium sulfate, 80 parts of ethanol solution with the volume fraction of 50% and 2 parts of zinc stearate.
A preparation method of a high-efficiency EVA foaming agent comprises the following steps:
S1: uniformly mixing the hydroxypropyl methylcellulose, dodecyl trimethyl ammonium chloride, calcium sulfate, ethanol solution with the volume fraction of 50% and zinc stearate, and stirring for 30min;
S2: and then adding the modified sodium bicarbonate and the calcium carbonate into the mixture obtained in the step S1, stirring for 2 hours, and drying at 30 ℃ for 24 hours to obtain the high-efficiency EVA foaming agent. The EVA foaming agent can foam the EVA base material according to the requirement.
The preparation method of the modified sodium bicarbonate in the step S2 specifically comprises the following steps:
s21: mixing aluminum chloride hexahydrate, ammonia water with the volume fraction of 75%, deionized water and ethanol solution with the volume fraction of 75%, and heating and stirring for 2 hours at 80 ℃ to obtain alumina sol; wherein, the weight ratio of the aluminum chloride hexahydrate, the ammonia water, the deionized water and the ethanol solution is 1:5:10:15;
mixing tetraethoxysilane with absolute ethyl alcohol to obtain a mixed solution, adding a sulfuric acid solution with the volume fraction of 30% into the mixed solution, adjusting the pH value to 6-7, and stirring for 2 hours to obtain silica sol; wherein, the weight ratio of the tetraethoxysilane to the absolute ethyl alcohol to the sulfuric acid solution is 1:10:3;
adding the silica sol into the alumina sol, and stirring for 14 hours to obtain alumina-silica sol;
S22: adding 50% ethanol solution and sodium bicarbonate into the alumina-silica sol obtained in the step S21, stirring for 3h, aging for 36h, and drying at 40 ℃ for 8h to obtain modified sodium bicarbonate, wherein the weight ratio of the 50% ethanol solution to the sodium bicarbonate to the alumina-silica sol is 20:10:1.
Example 2:
The high-efficiency EVA foaming agent comprises the following components in parts by weight: 60 parts of modified sodium bicarbonate, 2 parts of hydroxypropyl methyl cellulose, 5 parts of dodecyl trimethyl ammonium chloride, 20 parts of calcium carbonate (foaming agent), 1 part of calcium sulfate, 60 parts of ethanol solution with the volume fraction of 50 percent and 1 part of zinc stearate.
A preparation method of a high-efficiency EVA foaming agent comprises the following steps:
s1: uniformly mixing the hydroxypropyl methylcellulose, dodecyl trimethyl ammonium chloride, calcium sulfate, ethanol solution with the volume fraction of 50% and zinc stearate, and stirring for 20min;
S2: and then adding the modified sodium bicarbonate and the calcium carbonate into the mixture obtained in the step S1, stirring for 2 hours, and drying at 25 ℃ for 36 hours to obtain the high-efficiency EVA foaming agent. The EVA foaming agent can foam the EVA base material according to the requirement.
The preparation method of the modified sodium bicarbonate in the step S2 specifically comprises the following steps:
S21: mixing aluminum chloride hexahydrate, ammonia water with the volume fraction of 75%, deionized water and ethanol solution with the volume fraction of 75%, and heating and stirring for 1h at 80 ℃ to obtain alumina sol; wherein, the weight ratio of the aluminum chloride hexahydrate, the ammonia water, the deionized water and the ethanol solution is 1:5:10:15;
mixing tetraethoxysilane with absolute ethyl alcohol to obtain a mixed solution, adding a sulfuric acid solution with the volume fraction of 30% into the mixed solution, adjusting the pH value to 6-7, and stirring for 2 hours to obtain silica sol; wherein, the weight ratio of the tetraethoxysilane to the absolute ethyl alcohol to the sulfuric acid solution is 1:10:3;
adding the silica sol into the alumina sol, and stirring for 12 hours to obtain alumina-silica sol;
S22: adding 50% ethanol solution and sodium bicarbonate into the alumina-silica sol obtained in the step S21, stirring for 2h, aging for 24h, and drying at 40 ℃ for 6h to obtain modified sodium bicarbonate, wherein the weight ratio of the 50% ethanol solution to the sodium bicarbonate to the alumina-silica sol is 20:10:1.
Example 3:
The high-efficiency EVA foaming agent comprises the following components in parts by weight: 70 parts of modified sodium bicarbonate, 3 parts of hydroxypropyl methyl cellulose, 6 parts of dodecyl trimethyl ammonium chloride, 25 parts of calcium carbonate (foaming agent), 1.5 parts of calcium sulfate, 70 parts of ethanol solution with the volume fraction of 50% and 1.5 parts of zinc stearate.
A preparation method of a high-efficiency EVA foaming agent comprises the following steps:
s1: uniformly mixing the hydroxypropyl methylcellulose, dodecyl trimethyl ammonium chloride, calcium sulfate, ethanol solution with the volume fraction of 50% and zinc stearate, and stirring for 25min;
S2: and then adding the modified sodium bicarbonate and the calcium carbonate into the mixture obtained in the step S1, stirring for 2 hours, and drying for 30 hours at the temperature of 28 ℃ to obtain the high-efficiency EVA foaming agent. The EVA foaming agent can foam the EVA base material according to the requirement.
The preparation method of the modified sodium bicarbonate in the step S2 specifically comprises the following steps:
S21: mixing aluminum chloride hexahydrate, ammonia water with the volume fraction of 75%, deionized water and ethanol solution with the volume fraction of 75%, and heating and stirring at 80 ℃ for 1.5 hours to obtain alumina sol; wherein, the weight ratio of the aluminum chloride hexahydrate, the ammonia water, the deionized water and the ethanol solution is 1:5:10:15;
mixing tetraethoxysilane with absolute ethyl alcohol to obtain a mixed solution, adding a sulfuric acid solution with the volume fraction of 30% into the mixed solution, adjusting the pH value to 6-7, and stirring for 2 hours to obtain silica sol; wherein, the weight ratio of the tetraethoxysilane to the absolute ethyl alcohol to the sulfuric acid solution is 1:10:3;
adding the silica sol into the alumina sol, and stirring for 13 hours to obtain alumina-silica sol;
S22: adding 50% ethanol solution and sodium bicarbonate into the alumina-silica sol obtained in the step S21, stirring for 2.5h, aging for 30h, and drying at 40 ℃ for 7h to obtain modified sodium bicarbonate, wherein the weight ratio of the 50% ethanol solution to the sodium bicarbonate to the alumina-silica sol is 20:10:1.
Comparative example 1:
comparative example 1 was prepared in substantially the same manner as in example 1, except that sodium bicarbonate was directly used without modifying the sodium bicarbonate, specifically:
An EVA foaming agent comprises the following components in parts by weight: 80 parts of sodium bicarbonate, 4 parts of hydroxypropyl methyl cellulose, 8 parts of dodecyl trimethyl ammonium chloride, 30 parts of calcium carbonate, 2 parts of calcium sulfate, 80 parts of ethanol solution with the volume fraction of 50% and 2 parts of zinc stearate.
The preparation method of the EVA foaming agent comprises the following steps:
S1: uniformly mixing the hydroxypropyl methylcellulose, dodecyl trimethyl ammonium chloride, calcium sulfate, ethanol solution with the volume fraction of 50% and zinc stearate, and stirring for 30min;
S2: and then adding the sodium bicarbonate and the calcium carbonate into the mixture obtained in the step S1, stirring for 2 hours, and drying at 30 ℃ for 24 hours to obtain the high-efficiency EVA foaming agent. The EVA foaming agent can foam the EVA base material according to the requirement.
The EVA foaming agents of examples 1 to 3, commercially available Shanghai Hongshi plasticizing Co., ltd, and the EVA foaming agent obtained in comparative example 1 were each subjected to gas forming amount, decomposition rate, foaming volume ratio and formamide residue.
The minimum decomposition temperature of the decomposition rate measurement was measured by 209F1 thermogravimetric analysis (TGA) of NETZSCH, germany. The temperature rising range is 30-700 ℃, the temperature rising rate is 20 ℃/min, and the nitrogen atmosphere is adopted. The gas formation and the expansion ratio of the foaming volume are measured according to the foaming multiple and sedimentation distance method.
The porosity of the communication was measured by means of Xradia and 520Versa type X-ray tomography.
Cutting EVA foaming material sample into fixed size, placing in a reaction bottle, adding methanol, and sealing. After ultrasonic extraction for a certain time, filtering the extract cooled to room temperature into a sample bottle through an organic filter membrane, and measuring the residual quantity of formamide in the EVA foaming material by adopting meteorological chromatography-mass spectrometry.
Table 1: test data for commercially available foaming Agents of examples 1-3, commercially available foaming Agents and comparative example 1
Test item | Example 1 | Example 2 | Example 3 | Comparative example 1 | Commercially available foaming agent |
Air formation mL/g | 164 | 162 | 162 | 113 | 142 |
Decomposition Rate mL/g/min | 0.83 | 0.79 | 0.81 | 0.68 | 0.72 |
Foaming volume multiplying power | 5.9 | 5.7 | 5.7 | 5.1 | 5.0 |
Porosity of communication | 1.2 | 1.5 | 1.4 | 12.5 | 16.7 |
Residual amount of formamide ppm | 0 | 0 | 0 | 0 | 1.7 |
As can be seen from the above table, the gas evolution and decomposition rate of examples 1-3 are both improved compared with those of comparative example 1 and the commercial foaming agent, which shows that the modified sodium bicarbonate of the present invention has more catalytic action, low interconnected porosity, better foaming of sodium bicarbonate,
The foaming rate is high, the residual quantity of formamide is low, and the environment-friendly effect is good.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The application of the modified sodium bicarbonate is characterized in that the EVA foaming agent is prepared by using the modified sodium bicarbonate, and the preparation method comprises the following steps:
s1: mixing hydroxypropyl methylcellulose, dodecyl trimethyl ammonium chloride, calcium sulfate, ethanol solution with volume fraction of 50% and zinc stearate, and stirring for 20-30min;
S2: then adding modified sodium bicarbonate and a foaming agent into the mixture obtained in the step S1, and stirring and drying to obtain the high-efficiency EVA foaming agent;
The modification method of the sodium bicarbonate specifically comprises the following steps:
S21: preparing alumina-silica sol;
S22: adding 50% ethanol solution and sodium bicarbonate into the alumina-silica sol obtained in the step S21, stirring for 2-3h, aging for 24-36h, and drying at 40 ℃ for 6-8h to obtain modified sodium bicarbonate;
In the step S22, the weight part ratio of the ethanol solution with the volume fraction of 50 percent, sodium bicarbonate to the alumina-silica sol is 20:10:1;
The weight portions of the components are as follows: 70-80 parts of modified sodium bicarbonate, 3-4 parts of hydroxypropyl methyl cellulose, 6-8 parts of dodecyl trimethyl ammonium chloride, 25-30 parts of foaming agent, 1.5-2 parts of calcium sulfate, 70-80 parts of ethanol solution with the volume fraction of 50% and 1.5-2 parts of zinc stearate.
2. The use of modified sodium bicarbonate according to claim 1, wherein in the step S22, the modified sodium bicarbonate is obtained by stirring for 2.5 hours, aging for 30 hours, and drying at 40 ℃ for 7 hours.
3. The use of modified sodium bicarbonate according to claim 1, wherein the preparation method of the alumina-silica sol in step S21 specifically comprises the following steps:
S23, mixing aluminum chloride hexahydrate, ammonia water with the volume fraction of 75%, deionized water and ethanol solution with the volume fraction of 75%, and heating and stirring at 80 ℃ for 1-2 hours to obtain alumina sol;
Mixing tetraethoxysilane with absolute ethyl alcohol to obtain a mixed solution, adding a sulfuric acid solution with the volume fraction of 30% into the mixed solution, adjusting the pH value to 6-7, and stirring for 1-2h to obtain silica sol;
And S24, adding the silica sol obtained in the step S23 into the alumina sol obtained in the step S23, and stirring for 12-14h to obtain the alumina-silica sol.
4. The use of modified sodium bicarbonate according to claim 3, wherein in the step S23, the weight ratio of aluminum chloride hexahydrate, ammonia water, deionized water and ethanol solution is 1:5:10:15; in the step S23, the weight ratio of the tetraethoxysilane to the absolute ethyl alcohol to the sulfuric acid solution is 1:10:3.
5. The use of modified sodium bicarbonate according to claim 1, wherein the drying in step S2 is carried out at a temperature of 25-30 ℃ for a period of 24-36 hours with stirring for 2 hours.
6. The use of modified sodium bicarbonate according to claim 1, wherein the drying in step S2 is carried out at a temperature of 28 ℃ for a drying time of 30 hours and stirring for 2 hours.
7. The use of modified sodium bicarbonate according to claim 1, wherein the components are in parts by weight: 80 parts of modified sodium bicarbonate, 4 parts of hydroxypropyl methyl cellulose, 8 parts of dodecyl trimethyl ammonium chloride, 30 parts of foaming agent, 2 parts of calcium sulfate, 80 parts of ethanol solution with the volume fraction of 50% and 2 parts of zinc stearate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310711239.9A CN116769218B (en) | 2022-07-07 | 2022-07-07 | Sodium bicarbonate modification method and application thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310711239.9A CN116769218B (en) | 2022-07-07 | 2022-07-07 | Sodium bicarbonate modification method and application thereof |
CN202210791738.9A CN115181315B (en) | 2022-07-07 | 2022-07-07 | Efficient EVA foaming agent and preparation method thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210791738.9A Division CN115181315B (en) | 2022-07-07 | 2022-07-07 | Efficient EVA foaming agent and preparation method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
CN116769218A CN116769218A (en) | 2023-09-19 |
CN116769218B true CN116769218B (en) | 2024-05-10 |
Family
ID=83516968
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202310711239.9A Active CN116769218B (en) | 2022-07-07 | 2022-07-07 | Sodium bicarbonate modification method and application thereof |
CN202210791738.9A Active CN115181315B (en) | 2022-07-07 | 2022-07-07 | Efficient EVA foaming agent and preparation method thereof |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202210791738.9A Active CN115181315B (en) | 2022-07-07 | 2022-07-07 | Efficient EVA foaming agent and preparation method thereof |
Country Status (1)
Country | Link |
---|---|
CN (2) | CN116769218B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110819019A (en) * | 2019-10-24 | 2020-02-21 | 南京聚能新材料有限公司 | Preparation method of composite XPS insulation board |
WO2020059917A1 (en) * | 2018-09-20 | 2020-03-26 | 주식회사 금양 | Resin composition with improved shrinkage comprising mixed blowing agent |
CN111607253A (en) * | 2020-05-25 | 2020-09-01 | 成都新柯力化工科技有限公司 | Preparation method of silica aerogel thermal insulation filler |
CN114479158A (en) * | 2022-03-16 | 2022-05-13 | 青岛科技大学 | Preparation method of high-dispersion foaming agent and composite foaming agent thereof |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1092169A (en) * | 1965-02-25 | 1967-11-22 | Congoleum Nairn Inc | Textured foam product and process for the production thereof |
US20040241238A1 (en) * | 2001-05-25 | 2004-12-02 | Pilar Sepulveda | Foamed sol-gel and method of manufacturing the same |
JP6665471B2 (en) * | 2014-09-30 | 2020-03-13 | 大日本印刷株式会社 | LAMINATED SHEET, FOAM LAMINATED SHEET, AND PROCESS FOR PRODUCING THEM |
CN105384958A (en) * | 2015-12-19 | 2016-03-09 | 仇颖超 | Method for preparing silica sol modified azodicarbonamide foaming agent |
CN107722333B (en) * | 2017-08-21 | 2019-03-01 | 宁波中金石化有限公司 | A kind of preparation method of differential pentane foaming agent |
CN111909439B (en) * | 2020-07-23 | 2023-02-14 | 福建省灿辉环保科技有限公司 | High-performance EVA (ethylene-vinyl acetate) foam material with uniformly distributed cells and preparation method thereof |
-
2022
- 2022-07-07 CN CN202310711239.9A patent/CN116769218B/en active Active
- 2022-07-07 CN CN202210791738.9A patent/CN115181315B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020059917A1 (en) * | 2018-09-20 | 2020-03-26 | 주식회사 금양 | Resin composition with improved shrinkage comprising mixed blowing agent |
CN110819019A (en) * | 2019-10-24 | 2020-02-21 | 南京聚能新材料有限公司 | Preparation method of composite XPS insulation board |
CN111607253A (en) * | 2020-05-25 | 2020-09-01 | 成都新柯力化工科技有限公司 | Preparation method of silica aerogel thermal insulation filler |
CN114479158A (en) * | 2022-03-16 | 2022-05-13 | 青岛科技大学 | Preparation method of high-dispersion foaming agent and composite foaming agent thereof |
Also Published As
Publication number | Publication date |
---|---|
CN115181315A (en) | 2022-10-14 |
CN115181315B (en) | 2023-06-30 |
CN116769218A (en) | 2023-09-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108492999A (en) | A method of three-dimensional structure Co-MOF/NF electrode material for super capacitor is prepared in situ based on nickel foam | |
CN105732860B (en) | The expandable polystyrene bead and preparation method of inflatable few layer graphene | |
MY126320A (en) | Water-containing polyolefin resin compositon, pre- expanded particles made thereof, process for preparing the same and cellular molded article | |
CN113754954A (en) | Foamed polymer wave-absorbing material with high porosity and high closed porosity and preparation method thereof | |
CN116769218B (en) | Sodium bicarbonate modification method and application thereof | |
CN111939878A (en) | Ternary composite aerogel and preparation method and application thereof | |
CN114940803A (en) | Covalent organic framework material with hierarchical pore structure, proton conducting material and preparation method thereof | |
CN106117914A (en) | A kind of antibacterial heat-resistant PVC NBR composite foamed plate containing silver-carrying nano zeolite and preparation method thereof | |
CN110467377B (en) | Environment-friendly composite mineral insulation board and preparation process thereof | |
CN103205012A (en) | Composite foaming agent for sponge rubber | |
CN114806052B (en) | Wave-absorbing/light structure integrated foam material and preparation method and application thereof | |
CN116218201A (en) | Self-skinning foaming material and preparation method thereof | |
CN115181316B (en) | Modified EVA foaming agent and preparation method thereof | |
CN114133675B (en) | Polystyrene foam material with good flame retardance and preparation process thereof | |
CN117264264A (en) | EVA foaming agent with high foaming rate and no pungent smell and preparation method thereof | |
CN112724454A (en) | Environment-friendly chemical foaming agent and preparation method thereof | |
CN112210168A (en) | Flexible composite sound absorption material, preparation method and application thereof | |
CN111534275A (en) | Low-density heat-insulation pouring sealant for new energy power battery module | |
CN113149693A (en) | Formula and preparation process of inorganic heat-insulating material adopting three-stage foaming system | |
CN113773650B (en) | Silicone rubber sponge and preparation method thereof | |
CN117264265A (en) | Environment-friendly EVA composite foaming agent and preparation method thereof | |
CN107641189A (en) | A kind of solar water container polyurethane heat insulation material | |
CN116474743A (en) | Efficient and durable porous geopolymer adsorbent and method thereof | |
CN109336550A (en) | A kind of heat preserving ceramic and its preparation process | |
CN116477967B (en) | Porous fly ash modified foam concrete, and preparation method and application thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |