CN106397952A - Thermal insulation material and preparation method thereof - Google Patents
Thermal insulation material and preparation method thereof Download PDFInfo
- Publication number
- CN106397952A CN106397952A CN201610787111.0A CN201610787111A CN106397952A CN 106397952 A CN106397952 A CN 106397952A CN 201610787111 A CN201610787111 A CN 201610787111A CN 106397952 A CN106397952 A CN 106397952A
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- Prior art keywords
- insulation material
- preparation
- foaming
- vinyl acetate
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C08L23/0853—Vinylacetate
-
- 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
- C08J9/10—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 nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
-
- 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
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- 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
-
- 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
- C08J2407/00—Characterised by the use of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The present invention discloses a preparation method of a silica aerogel composite thermal insulation material. The method comprises the steps of S1, mixing up ethylene-vinyl acetate copolymer mixed with stearic acid, and subjecting mixed materials to roll banding; S2, adding a foaming agent and a foaming aid, and subjecting obtained materials to primary mixing and foaming; S3, adding a crosslinking agent, a crosslinking aid, silica aerogel powders and natural rubber, and subjecting materials to mixing; S4, outputting a sheet, cutting the sheet, subjecting the sheet to die-filling and hot-pressing, cooling, shaping and cutting. The thermal insulation material is simple in preparation process and low in cost. Meanwhile, the prepared thermal insulation material is low in heat conduction coefficient, good in flexibility, and suitable for being applied to the garment field.
Description
Technical field
The present invention relates to the technical field of insulation material, particularly to a kind of flexibility aerosil complex heat-preservation material
Material.
Background technology
In terms of calorifics, the nano-porous structure of aeroge can effectively suppress the gentle body heat transferring of solid-state conduction of heat, has
Excellent insulative properties, are the solid-state materials generally acknowledging that thermal conductivity is minimum at present.Due to aerogel powder material not easy-formation, SiO2
Aerogel powder is general not to be used separately as heat preserving and insulating material, but can be combined as insulation material with other materials
Expect to use.
Adopting supercritical drying process, high cost aerogel heat-proof composite material at present, danger coefficient is big, therefore develops more
The difficult problem that a kind of urgent need prepared aeroge heat-insulating composite material and become in industry of advantage of lower cost is captured.Existing
In technology, the aeroge insulation of exploitation meets material and is mainly used in building field, and its fragility is high, pliability is poor, at it
It is greatly limited during the application of his field, especially clothing field of heat insulating materials.Therefore give aerogel composite
Enough intensity and pliability are that it realizes large-scale application, and especially in clothing field of heat insulating materials, must solve asks
Topic.
Content of the invention
It is an object of the invention to provide a kind of preparation method of aerosil compound insulating material, this insulation material
There are preparation process is simple, low cost and other advantages, and the insulation material heat conductivity of this technique preparation is low, pliability is good, is suitable for
It is applied to clothing insulation material.
The present invention provides a kind of preparation method of insulation material, comprises the steps of：
S1, ethylene-vinyl acetate copolymer is mixed with stearic acid after carry out bag roller；
S2, addition foaming agent and blowing promotor, carry out just kneading, foaming；
S3, addition cross-linking agent and crosslinking coagent, silica aerogel powder, natural rubber, are kneaded；
S4, slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample.
In this preparation technology, because ethylene-vinyl acetate copolymer viscosity is low, when material mixes, can save and pinch
And technique, only with mixing substep feeding method.Mix stage puts into the silica aerogel powder that normal temperature and pressure is obtained wherein,
One step foaming compression molding after mixing, you can finished product material, has the advantages that good heat conductivity, pliability are good.And
Condition and the supercritical drying equipment of High Temperature High Pressure is eliminated, therefore cost is declined in preparation technology.
In some embodiments, foaming agent is azodicarbonamide, and described blowing promotor is zinc oxide.The foaming selecting
Agent azodicarbonamide gas forming amount big (for 250～300ml/g), and have that thermal discharge is less, based on good dispersion, release nitrogen again
It is difficult effusion from foam.Zinc oxide blowing promotor is added to increase the temperature range of foaming, simultaneous oxidation zinc also suppresses azo
The secondary reaction that diformamide decomposes, thus prevent generation Carbimide. and ammonia from equipment is caused corrode.
In some embodiments, cross-linking agent is cumyl peroxide, and described crosslinking coagent is 1,2- divinylbenzene.
As cross-linking agent, 1,2- divinylbenzene makees crosslinking coagent to cumyl peroxide, greatly reduces prevulcanization, extends mixed
The period of storage of refining glue, its vulcanizate has good dynamic property, and compression set is little, and hardness is slightly lower, moderate strength, bullet
Property and ageing-resistant performance are all preferable.
In some embodiments, in ethylene-vinyl acetate copolymer, the content of vinylacetate is 18%-21%.
Vinyl acetate content is less, and the property of its copolymer is closer to polyethylene；Content is bigger, and the property of its copolymer is closer to rubber
Glue.But ethylene-vinyl acetate copolymer degree of crystallinity increases with vinyl acetate content and reduces, and therefore vinylacetate contains
Amount is optimum content in 18-21%.
In some embodiments, blowing temperature is 165 DEG C -180 DEG C, and blow pressure is 15MPa, and foamed time is 15 points
Clock.This is the optimal foam process groped.If clamp time is too short, the degree of cross linking is low, bubble material viscosity mould, with azo diformazan
The increasing of Amidolytic gas flow, the ethylene-vinyl acetate copolymer of low cross-linking holds the impact that can't stand powerful air pressure and breaks
Split；If clamp time is long, lead to the degree of cross linking of product excessive, bubble material occurs and shrinks.If temperature is too high, peroxidating diisopropyl
The crosslinking temperature of benzene and azodicarbonamide decomposition rate are too high, thus leading to the product molding time wayward；Temperature is too low,
Lead to azodicarbonamide decomposition rate and cumyl peroxide crosslinking rate incompatible.Blowing temperature ratio in this technique
The foam process of general 200-230 DEG C of plastics is reduced.
Specific embodiment
Following case study on implementation, is described in more detail to the present invention.
Case study on implementation 1：
In terms of mass fraction, after 100 parts of ethylene-vinyl acetate copolymers are mixed with 0.8 part of stearic acid, carry out bag roller,
Wherein in ethylene-vinyl acetate copolymer, the content of vinylacetate is 21%；Add 10 parts of azodicarbonamides and 1.5 parts
Zinc oxide, carries out just kneading, foaming, blowing temperature is 165 DEG C, and blow pressure is 15MPa, and foamed time is 15 minutes；Add
0.6 part of cumyl peroxide and 0.5 part of 1,2- divinylbenzene, 40 parts of silica aerogel powder, 10 parts of natural rubbers,
Kneaded；Slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample, obtain the thick aeroge compound insulating material of 1.5mm.
Case study on implementation 2：
In terms of mass fraction, after 100 parts of ethylene-vinyl acetate copolymers are mixed with 1 part of stearic acid, carry out bag roller, its
In middle ethylene-vinyl acetate copolymer, the content of vinylacetate is 20%；Add 12 parts of azodicarbonamides and 1.5 parts of oxygen
Change zinc, carry out just kneading, foaming, blowing temperature is 180 DEG C, blow pressure is 15MPa, foamed time is 15 minutes；Add 0.5
Part cumyl peroxide and 0.5 part of 1,2- divinylbenzene, 50 parts of silica aerogel powder, 10 parts of natural rubbers, enter
Row mixing；Slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample, obtain the thick aeroge compound insulating material of 1.5mm.
Case study on implementation 3：
In terms of mass fraction, after 100 parts of ethylene-vinyl acetate copolymers are mixed with 0.9 part of stearic acid, carry out bag roller,
Wherein in ethylene-vinyl acetate copolymer, the content of vinylacetate is 18%；Add 20 parts of azodicarbonamides and 1.5 parts
Zinc oxide, carries out just kneading, foaming, blowing temperature is 170 DEG C, and blow pressure is 15MPa, and foamed time is 15 minutes；Add
0.3 part of cumyl peroxide and 0.5 part of 1,2- divinylbenzene, 60 parts of silica aerogel powder, 10 parts of natural rubbers,
Kneaded；Slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample, obtain the thick aeroge compound insulating material of 1.5mm.
Contrast case 1：
In terms of mass fraction, after 100 parts of ethylene-vinyl acetate copolymers are mixed with 0.9 part of stearic acid, carry out bag roller,
Wherein in ethylene-vinyl acetate copolymer, the content of vinylacetate is 18%；Add 20 parts of azodicarbonamides and 1.5 parts
Zinc oxide, carries out just kneading, foaming, blowing temperature is 170 DEG C, and blow pressure is 15MPa, and foamed time is 15 minutes；Add
0.3 part of cumyl peroxide and 0.5 part of 1,2- divinylbenzene, 20 parts of silica aerogel powder, 10 parts of natural rubbers,
Kneaded；Slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample, obtain the thick aeroge compound insulating material of 1.5mm.
Contrast case 2：
In terms of mass fraction, after 100 parts of ethylene-vinyl acetate copolymers are mixed with 0.9 part of stearic acid, carry out bag roller,
Wherein in ethylene-vinyl acetate copolymer, the content of vinylacetate is 18%；Add 20 parts of azodicarbonamides and 1.5 parts
Zinc oxide, carries out just kneading, foaming, blowing temperature is 170 DEG C, and blow pressure is 15MPa, and foamed time is 15 minutes；Add
0.3 part of cumyl peroxide and 0.5 part of 1,2- divinylbenzene, 100 parts of silica aerogel powder, 10 parts of natural rubbers
Glue, is kneaded；Slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample, obtain the thick aeroge compound insulating material of 1.5mm.
Heat conductivity at 35 DEG C for the gained insulation material in table 1 case study on implementation.
| Heat conductivity W/ (m K) | |
| Case study on implementation 1 | 0.0290 |
| Case study on implementation 2 | 0.0278 |
| Case study on implementation 3 | 0.0288 |
| Contrast case 1 | 0.036 |
| Contrast case 2 | 0.0280 |
The embodiment that the present invention provides, the thickness obtaining is that the thermal conductivity of the board type insulant of 1.5mm is low, wherein in fact
The thermal conductivity applying the insulation material that the optimum process in case 2 obtains is minimum.And preparation process is simple, preparation cost is also significantly
Decline, the board type insulant pliability obtaining is good, is suitable for clothing insulation material.And contrast in case 1, due to titanium dioxide
Silica aerogel addition is very few, leads to the thermal conductivity coefficient of composite too high, in contrast case 2, due to aerosil
Addition is too high although the thermal conductivity coefficient of composite is relatively low, but the composite fragility height obtaining, pliability are poor.
Presented above be only the present invention optimal way it is noted that to those skilled in the art, not
On the premise of departing from the invention design, some deformation can also be made and improve, these also should be regarded as the protection model invented
Within enclosing.
Claims (5)
1. a kind of preparation method of insulation material is it is characterised in that comprise the steps of：
S1, ethylene-vinyl acetate copolymer is mixed with stearic acid after carry out bag roller；
S2, addition foaming agent and blowing promotor, carry out just kneading, foaming；
S3, addition cross-linking agent and crosslinking coagent, silica aerogel powder, natural rubber, are kneaded；
S4, slice, cut-parts, die-filling hot pressing, cooling and shaping, sanction sample.
2. a kind of preparation method of insulation material according to claim 1 is it is characterised in that described foaming agent is azo two
Methanamide, described blowing promotor is zinc oxide.
3. a kind of preparation method of insulation material according to claim 1 is it is characterised in that described cross-linking agent is peroxidating
Diisopropylbenzene (DIPB), described crosslinking coagent is 1,2- divinylbenzene.
4. a kind of preparation method of insulation material according to claim 1 is it is characterised in that described ethene-vinyl acetate
In ester copolymer, the content of vinylacetate is 18%-21%.
5. a kind of preparation method of insulation material according to claim 1 is it is characterised in that described blowing temperature is 165
DEG C -180 DEG C, blow pressure is 15MPa, and foamed time is 15 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610787111.0A CN106397952A (en) | 2016-08-31 | 2016-08-31 | Thermal insulation material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610787111.0A CN106397952A (en) | 2016-08-31 | 2016-08-31 | Thermal insulation material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN106397952A true CN106397952A (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610787111.0A Pending CN106397952A (en) | 2016-08-31 | 2016-08-31 | Thermal insulation material and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141531A (en) * | 2017-05-27 | 2017-09-08 | 徐文忠 | A kind of aeroge composite adiabatic rubber and plastic and preparation method thereof |
| CN107759945A (en) * | 2017-11-01 | 2018-03-06 | 安徽鼎隆重工科技有限公司 | Die casting machine hydraulic oil cooler external application insulation material |
| CN109021376A (en) * | 2018-07-18 | 2018-12-18 | 江苏理工学院 | A kind of halogen-free flameproof EVA foamed material and preparation method thereof |
| CN110540696A (en) * | 2019-09-26 | 2019-12-06 | 广州恩沣新材料科技有限公司 | Aerogel EVA light breathable heat-insulation composite material and preparation method thereof |
| CN111253664A (en) * | 2019-03-18 | 2020-06-09 | 罗瑞尔纳米合成材料(江苏)有限公司 | Foamed polyethylene cotton composite material and preparation method thereof |
| CN111825901A (en) * | 2019-04-15 | 2020-10-27 | 江苏泛亚微透科技股份有限公司 | Silicon dioxide aerogel flexible elastic heat insulation composite material and preparation method thereof |
| WO2021000363A1 (en) * | 2019-07-02 | 2021-01-07 | 蒋荣军 | Fabrication process for environmentally friendly insoles based on water hyacinth raw materials |
| CN115058048A (en) * | 2022-06-24 | 2022-09-16 | 厦门冠颜塑化科技有限公司 | EVA (ethylene-vinyl acetate copolymer) foaming shoe material with high heat insulation performance and preparation method thereof |
Citations (2)
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|---|---|---|---|---|
| CN101880418A (en) * | 2010-06-30 | 2010-11-10 | 华南理工大学 | Transparent EVA heat insulating material and preparation method thereof |
| CN105566730A (en) * | 2014-09-04 | 2016-05-11 | 张文俊 | Poly vinyl acetate modified foaming body |
-
2016
- 2016-08-31 CN CN201610787111.0A patent/CN106397952A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880418A (en) * | 2010-06-30 | 2010-11-10 | 华南理工大学 | Transparent EVA heat insulating material and preparation method thereof |
| CN105566730A (en) * | 2014-09-04 | 2016-05-11 | 张文俊 | Poly vinyl acetate modified foaming body |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107141531A (en) * | 2017-05-27 | 2017-09-08 | 徐文忠 | A kind of aeroge composite adiabatic rubber and plastic and preparation method thereof |
| CN107759945A (en) * | 2017-11-01 | 2018-03-06 | 安徽鼎隆重工科技有限公司 | Die casting machine hydraulic oil cooler external application insulation material |
| CN109021376A (en) * | 2018-07-18 | 2018-12-18 | 江苏理工学院 | A kind of halogen-free flameproof EVA foamed material and preparation method thereof |
| CN111253664A (en) * | 2019-03-18 | 2020-06-09 | 罗瑞尔纳米合成材料(江苏)有限公司 | Foamed polyethylene cotton composite material and preparation method thereof |
| CN111253664B (en) * | 2019-03-18 | 2022-09-06 | 罗瑞尔纳米合成材料(江苏)有限公司 | Preparation method of aerogel foamed polyethylene cotton composite material |
| CN111825901A (en) * | 2019-04-15 | 2020-10-27 | 江苏泛亚微透科技股份有限公司 | Silicon dioxide aerogel flexible elastic heat insulation composite material and preparation method thereof |
| WO2021000363A1 (en) * | 2019-07-02 | 2021-01-07 | 蒋荣军 | Fabrication process for environmentally friendly insoles based on water hyacinth raw materials |
| CN110540696A (en) * | 2019-09-26 | 2019-12-06 | 广州恩沣新材料科技有限公司 | Aerogel EVA light breathable heat-insulation composite material and preparation method thereof |
| WO2021057846A1 (en) * | 2019-09-26 | 2021-04-01 | 广州恩沣新材料科技有限公司 | Aerogel eva light-weight breathable and thermal insulation composite material and preparation method therefor |
| CN115058048A (en) * | 2022-06-24 | 2022-09-16 | 厦门冠颜塑化科技有限公司 | EVA (ethylene-vinyl acetate copolymer) foaming shoe material with high heat insulation performance and preparation method thereof |
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Application publication date: 20170215 |