CN113214527A - Preparation method of high-strength XPS (extruded polystyrene) heat insulation board - Google Patents
Preparation method of high-strength XPS (extruded polystyrene) heat insulation board Download PDFInfo
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- CN113214527A CN113214527A CN202110603180.2A CN202110603180A CN113214527A CN 113214527 A CN113214527 A CN 113214527A CN 202110603180 A CN202110603180 A CN 202110603180A CN 113214527 A CN113214527 A CN 113214527A
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- 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
- C08J9/12—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 physical blowing agent
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
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- 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
- C08J2203/06—CO2, N2 or noble gases
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- 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
- C08J2203/08—Supercritical fluid
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- 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
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/10—Metal compounds
- C08K3/14—Carbides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
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Abstract
The invention discloses a preparation method of a high-strength XPS extrusion molding insulation board, belonging to the technical field of preparation of XPS extrusion molding insulation boards; the specific scheme is that the raw materials for preparing the insulation board comprise an active carbon-graphene embedding substance, and the preparation method of the embedding substance comprises the following steps: ball-milling tungsten carbide and graphene powder together, adding activated carbon, continuing ball-milling, adding water into a ball-milled mixture, adjusting the pH to 8-8.5, performing ultrasonic treatment under a stirring state, and performing centrifugal filtration on the solution after ultrasonic treatment to obtain a precipitate; treating the precipitate at the temperature of 350-550 ℃ for 20-30min to obtain activated carbon-graphene powder; embedding the activated carbon-graphene powder by using melamine resin to obtain an activated carbon-graphene embedded substance; the prepared XPS extrusion molding insulation board has higher integral waterproof performance, light weight and high strength.
Description
Technical Field
The invention belongs to the technical field of preparation of XPS (extruded polystyrene) insulation boards, and relates to a preparation method of a high-strength XPS extrusion insulation board.
Background
XPS is one kind of heat insulating material, which is called extruded polystyrene foam plastic, and is hard foam plastic board produced with polystyrene resin as material, other supplementary material and polymer, and through heating, mixing, catalyst injection and extrusion molding, and has perfect closed-cell honeycomb structure, and this makes XPS board possess very low water absorption, low heat conductivity, high pressure resistance, high ageing resistance, light weight, high strength, low water absorption and easy construction. Along with the continuous development of the technology and the continuous improvement of the requirements on the heat insulation material, higher requirements are also provided for the strength and the high temperature resistance of the XPS extrusion molding heat insulation board.
Many prior art are also being preparing high strength XPS extrusion molding heated board through increasing the metal level or cross-linking other composition, but have appeared other problems in different degrees again, for example make XPS extrusion molding heated board's volume weight increase or make the foaming multiplying power decline.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides a preparation method of a high-strength XPS extruded insulation board so as to prepare the XPS extruded insulation board with light weight and high strength.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
A preparation method of a high-strength XPS extrusion molding insulation board comprises the following steps of foaming a prepared raw material, wherein the raw material comprises an active carbon-graphene embedding material:
a) weighing 2-8% of tungsten carbide, 5-15% of graphene powder and the balance of activated carbon powder by mass percent, ball-milling the tungsten carbide and the graphene powder for 1-2h together, adding activated carbon, and continuing ball-milling for 20-30min to obtain a ball-milled mixture.
b) Adding water into the ball-milled mixture, adjusting the pH value to 8-8.5, carrying out ultrasonic treatment under a stirring state, and carrying out centrifugal filtration on the solution after ultrasonic treatment to obtain a precipitate.
c) And (3) treating the precipitate at the temperature of 350-550 ℃ for 20-30min to obtain the activated carbon-graphene powder.
d) And embedding the activated carbon-graphene powder by using melamine resin to obtain the activated carbon-graphene embedded substance.
Preferably, the raw material is obtained by mixing the active carbon-graphene embedded substance and polystyrene master batch, and the mass ratio of the active carbon-graphene embedded substance to the polystyrene master batch is 1-5: 75-95.
Preferably, the raw materials also comprise a flame retardant, and the mass percent of the flame retardant is 0.5-2.5%.
Preferably, the ball milling is dry ball milling, and the rotation speed of the ball milling is 240-300 r/min.
Preferably, the temperature of the ultrasonic treatment is 65-85 ℃, the time is 2-5h, and the frequency is 40-120 KHZ.
Preferably, the foaming operation is a supercritical carbon dioxide treatment process.
Preferably, 25-35% of hydroxymethyl silicone oil by mass percent is added into the activated carbon-graphene embedded substance.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, tungsten carbide and graphene are ball-milled together, so that the tungsten carbide and the graphene have smaller particle sizes and are mixed more uniformly, and meanwhile, the tungsten carbide has a hexagonal crystal structure, so that the graphene is prevented from agglomerating in the ball-milling process. The active carbon has a large number of holes, and tungsten carbide and graphene with small particle sizes can continuously enter the holes of the active carbon in the ball milling process and are adsorbed on the surface of the active carbon. Through low-temperature ultrasonic treatment, tungsten carbide and graphene with small particle sizes further enter the activated carbon, and the combination of the tungsten carbide and the activated carbon is more stable; the mixture after high-temperature treatment enables tungsten carbide and graphene small particles to be combined in the activated carbon more stably, and in the high-temperature treatment, the activated carbon further develops a part of micropores and mesopores. The mixture is then embedded so that the structure of the mixture is not destroyed in the subsequent foaming operation.
The XPS extrusion molding insulation board added with the activated carbon-graphene embedding substance is internally provided with the activated carbon which stably adsorbs graphene and tungsten carbide, and continuous closed cells are formed due to embedding, so that the water absorption rate of the XPS extrusion molding insulation board is greatly reduced, and the overall weight is light and the strength is high.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solutions of the present invention are described in detail below with reference to examples, but the scope of protection is not limited thereto.
Example 1
A preparation method of a high-strength XPS extrusion molding insulation board comprises the following steps:
step 1: preparing a polystyrene raw material: crushing polystyrene to below 100 meshes, and extruding and granulating the polystyrene and a heat cross-linking agent through a double-screw extruder to obtain polystyrene master batches; the extrusion temperature of each section of the double-screw extruder is 165 ℃, 175 ℃ and 185 ℃ respectively.
Step 2: preparing an active carbon-graphene embedding material: weighing 5% of tungsten carbide and 10% of graphene powder by mass, and the balance of activated carbon powder, carrying out dry ball milling treatment on the tungsten carbide and the graphene powder for 2 hours, adding activated carbon, and continuing ball milling for 20min to obtain a ball-milled mixture; the rotation speed of the ball milling is 240-300 r/min.
Adding water with the mass 5 times of that of the ball-milled mixture into the ball-milled mixture, adjusting the pH value to 8 by using sodium bicarbonate, carrying out ultrasonic treatment under a stirring state, and carrying out centrifugal filtration on the solution after the ultrasonic treatment to obtain a precipitate; wherein the ultrasonic treatment temperature is 75 deg.C, the time is 3h, and the frequency is 60 KHZ.
And (3) treating the precipitate in a high-temperature furnace at 550 ℃ for 20min to obtain activated carbon-graphene powder. And then embedding the activated carbon-graphene powder by using melamine resin to obtain the activated carbon-graphene embedded substance. The embedding adopts a conventional embedding process.
And step 3: preparing an XPS extrusion molding insulation board: and mixing the active carbon-graphene inclusion compound with polystyrene master batches to obtain a raw material, wherein the mass ratio of the active carbon-graphene inclusion compound to the polystyrene master batches is 1: 80.
Adding the mixture into a reaction kettle after the mixture is completely mixed, and adding CO into the reaction kettle through a constant pressure pump2Stabilizing in supercritical state, mixing CO in a first static mixer2Mixing with promoter, and mixing with high pressure metering pump and mass flowmeter to obtain CO2Stably injecting into a first-stage screw, and mixing with polystyrene mixture by a second static mixer and a third static mixer in a grading manner to obtain CO2Stable injection and smooth foaming, and finally, a finished product is produced through a special die head.
Example 2
The preparation method of the high-strength XPS extruded insulation board is mainly the same as that in the embodiment 1, except that 1% of flame retardant by mass is added into the raw materials in the step 3.
Example 3
The main steps of the preparation method of the high-strength XPS extrusion molding insulation board are the same as those in the embodiment 1, except that 25 mass percent of hydroxymethyl silicone oil is added into the active carbon-graphene embedding object prepared in the step 2, and the mixture is mixed with polystyrene master batches to prepare the XPS extrusion molding insulation board.
Example 4
A preparation method of a high-strength XPS extrusion molding insulation board comprises the following steps:
step 1: preparing a polystyrene raw material: crushing polystyrene to below 100 meshes, and extruding and granulating the polystyrene and a heat cross-linking agent through a double-screw extruder to obtain polystyrene master batches; the extrusion temperature of each section of the double-screw extruder is 165 ℃, 175 ℃ and 185 ℃ respectively.
Step 2: preparing an active carbon-graphene embedding material: weighing 8% of tungsten carbide and 5% of graphene powder by mass, and the balance of activated carbon powder, carrying out dry ball milling treatment on the tungsten carbide and the graphene powder for 1h, adding activated carbon, and continuing ball milling for 20min to obtain a ball-milled mixture; the rotation speed of the ball milling is 240-300 r/min.
Adding water with the mass 5 times of that of the ball-milled mixture into the ball-milled mixture, adjusting the pH value to 8.2 by using sodium bicarbonate, performing ultrasonic treatment under a stirring state, and performing centrifugal filtration on the solution after the ultrasonic treatment to obtain a precipitate; wherein the ultrasonic treatment temperature is 65 deg.C, the time is 2h, and the frequency is 80 KHZ.
And (3) treating the precipitate in a high-temperature furnace at 500 ℃ for 30min to obtain activated carbon-graphene powder. And then embedding the activated carbon-graphene powder by using melamine resin to obtain the activated carbon-graphene embedded substance. The embedding adopts a conventional embedding process.
And step 3: preparing an XPS extrusion molding insulation board: and mixing the active carbon-graphene inclusion compound with polystyrene master batches to obtain a raw material, wherein the mass ratio of the active carbon-graphene inclusion compound to the polystyrene master batches is 1: 85.
After mixing, the mixture is added into a reaction kettle, and a finished product is produced by adopting the same supercritical carbon dioxide treatment process as that of the embodiment 1
Basic technical specifications of the XPS extruded insulation boards made in examples 1-4:
while the invention has been described in further detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The preparation method of the high-strength XPS extrusion molding insulation board is characterized in that the raw material comprises an active carbon-graphene embedding material, and the preparation of the embedding material comprises the following steps:
a) weighing 2-8% of tungsten carbide and 5-15% of graphene powder by mass percentage, and the balance of activated carbon powder, ball-milling the tungsten carbide and the graphene powder for 1-2h, adding activated carbon, and continuing ball-milling for 20-30min to obtain a ball-milled mixture;
b) adding water into the ball-milled mixture, adjusting the pH value to 8-8.5, carrying out ultrasonic treatment under a stirring state, and carrying out centrifugal filtration on the solution after ultrasonic treatment to obtain a precipitate;
c) treating the precipitate at the temperature of 350-550 ℃ for 20-30min to obtain activated carbon-graphene powder;
d) and embedding the activated carbon-graphene powder by using melamine resin to obtain the activated carbon-graphene embedded substance.
2. The preparation method of the high-strength XPS extrusion molding insulation board according to claim 1, wherein the raw material is obtained by mixing the active carbon-graphene inclusion compound and the polystyrene master batch, and the mass ratio of the active carbon-graphene inclusion compound to the polystyrene master batch is 1-5: 75-95.
3. The method for preparing the high-strength XPS extruded insulation board according to claim 2, wherein the raw materials further comprise a flame retardant, and the mass percentage of the flame retardant is 0.5-2.5%.
4. The method for preparing the high-strength XPS extrusion insulation board as claimed in claim 1, wherein the ball milling is dry ball milling, and the rotation speed of the ball milling is 240-300 r/min.
5. The method of claim 1, wherein the temperature of the ultrasonic treatment is 65-85 ℃, the time is 2-5h, and the frequency is 40-120 KHZ.
6. The method of manufacturing a high strength XPS extruded insulation board of claim 1 wherein the foaming operation is a supercritical carbon dioxide treatment process.
7. The method for preparing the high-strength XPS extruded insulation board according to claim 1, wherein 25-35% by mass of hydroxymethyl silicone oil is added into the active carbon-graphene embedding material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113427806A (en) * | 2021-05-31 | 2021-09-24 | 山西利源中天保温防腐工程有限公司 | Preparation method of polyurethane prefabricated direct-buried heat-insulation composite pipe |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500653A (en) * | 2020-11-24 | 2021-03-16 | 台春节能新材料(苏州)有限公司 | Preparation method of high-strength xps extrusion molding insulation board |
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- 2021-05-31 CN CN202110603180.2A patent/CN113214527A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112500653A (en) * | 2020-11-24 | 2021-03-16 | 台春节能新材料(苏州)有限公司 | Preparation method of high-strength xps extrusion molding insulation board |
Non-Patent Citations (4)
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| L. F. 哈奇，等: "《工业石油化学——从烃类到石油化学品》", 31 May 1987, 烃加工出版社 * |
| 励杭泉，等编著: "《材料导论》", 30 June 2013, 中国轻工业出版社 * |
| 周文英，等编著: "《聚合物基导热复合材料》", 30 June 2017, 国防工业出版社 * |
| 韦文诚著: "《固体燃料电池技术》", 30 October 2014, 上海交通大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113427806A (en) * | 2021-05-31 | 2021-09-24 | 山西利源中天保温防腐工程有限公司 | Preparation method of polyurethane prefabricated direct-buried heat-insulation composite pipe |
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