CN103101904B - Preparation method of foam carbon with pressure-resistant and shock-absorbing characteristics - Google Patents
Preparation method of foam carbon with pressure-resistant and shock-absorbing characteristics Download PDFInfo
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- CN103101904B CN103101904B CN201310072243.1A CN201310072243A CN103101904B CN 103101904 B CN103101904 B CN 103101904B CN 201310072243 A CN201310072243 A CN 201310072243A CN 103101904 B CN103101904 B CN 103101904B
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- preparation
- absorbing characteristics
- heating
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 title claims abstract 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract 4
- 239000006260 foam Substances 0.000 title abstract 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 5
- 239000004917 carbon fiber Substances 0.000 claims abstract description 5
- 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 abstract description 5
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000002243 precursor Substances 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 3
- 229920000881 Modified starch Polymers 0.000 claims abstract description 3
- 239000004368 Modified starch Substances 0.000 claims abstract description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 235000019426 modified starch Nutrition 0.000 claims abstract description 3
- 230000035939 shock Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 2
- 229930006000 Sucrose Natural products 0.000 claims description 2
- 230000001458 anti-acid effect Effects 0.000 claims description 2
- 238000005341 cation exchange Methods 0.000 claims description 2
- 238000005087 graphitization Methods 0.000 claims description 2
- 229910052622 kaolinite Inorganic materials 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- -1 sulfonyl hydrazines compound Chemical class 0.000 claims description 2
- 239000011800 void material Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims 1
- 229910052618 mica group Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010000 carbonizing Methods 0.000 abstract 1
- 239000004088 foaming agent Substances 0.000 abstract 1
- 235000021552 granulated sugar Nutrition 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Carbon And Carbon Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to a preparation method of foam carbon with pressure-resistant and shock-absorbing characteristics. The foam carbon comprises raw materials of vacuum residue, a foaming agent, modified starch, white granulated sugar, kaolin, carbon fiber and nickel nitrate. The preparation method comprises the steps of: firstly, mixing raw materials, heating, stirring, and homogenizing to prepare a precursor, conducting carbonizing treatment and graphitizing treatment under nitrogen protection, and cooling to obtain foam carbon with pressure-resistant and shock-absorbing characteristics. The preparation method is simple in production process, short in flow, easily controlled in operation, low in cost, beneficial for large-scale popularization and application.
Description
Technical field
The present invention relates to a kind of preparation method with the Carbon foam of withstand voltage shock absorbing characteristics.
Background technology
Carbon foam is a kind of light porous material with tridimensional network be made up of hole bubble and interconnective hole bubble wall.Carbon foam is a kind of excellent performance, broad-spectrum type material.According to the microtexture of its hole wall, it can be divided into: greying and non-graphitized Carbon foam.Carbon foam is except having the traditional performance of charcoal class material, also have that density is little, intensity is high, sound absorption, noise reduction good, anti-thermal shock, be convenient to the mechanical characteristicies such as processing, there are the physics and chemistries such as good conduction, heat transfer, suction ripple, corrosion-resistant, selective adsorption, by it and metal or nonmetally carry out compound, high performance structural material can be obtained.These special performances, make Carbon foam have great application potential in a lot of technical field such as petrochemical complex, space flight and aviation, automobile and communications and transportation, food, light industry, pharmacy, electronics etc.Adopt the exploitation of different starting material, different preparation methods, different manufacturing process technology parameters and technique itself, obtained Carbon foam stuctures and properties also has larger difference.
Because pitch is easy greying raw material, be that the Carbon foam of waste can the orderly carbonization structure of height of formation usually with pitch, having superperformance, as the performance such as heat conduction, conduction, is the raw material of comparatively widespread use at present.But the foreign matter content of pitch is high, the range of molecular weight distributions of composition is wide.General needs proceed the process such as intensive, the hydrogenation of heat and solvent extraction, and in the hope of the rational component of enrichment, technological operation is comparatively difficult.
Summary of the invention
The present invention is to provide that a kind of raw material is cheap and easy to get, technique is relatively simple, excellent product performance and the stable preparation method with the Carbon foam of withstand voltage shock absorbing characteristics.
The present invention solves the problems of the technologies described above with following technical scheme:
Initial feed component and mass percent are:
| Component | Mass percentage content |
| Vacuum residuum | 70%-80% |
| Whipping agent | 4%-6% |
| Modified starch | 3%-4% |
| White sugar | 3% |
| White kaolin | 3%-5% |
| Carbon fiber | 8%-9% |
| Nickelous nitrate | 2% |
Step of preparation process is:
By the at room temperature disposable integral mixing of all raw materials, stir and be heated to 130-150 DEG C, then use ultrasonic wave homogenizing, must pulpous state precursor after homogenizing;
(2), under keeping temperature 55-65 DEG C of state, pulpous state precursor is put into mould and enrich; The tubular type heating container being full of industrial nitrogen put into by whole mould, and heating is cured pre-treatment, and in maintenance heating container, nitrogen pressure is at 5-8Kpa;
(3) rate of heating controls: at the uniform velocity rise to 130-150 DEG C from room temperature 2-4h, insulation 2-3h; Then be heated to 1100-1200 DEG C, insulation 3-4h, heat-up rate: 2-3 DEG C/min; Then continue intensification and carry out graphitization processing, rate of heating controls at 18-25 DEG C/min, and temperature controls at 2500-2800 DEG C, insulation 1.5-2h; Rear cooling, cooling rate controls: 15-20 DEG C/min, to room temperature product.
Whipping agent is the azo-compound of mass ratio 40%-50% and the sulfonyl hydrazines compound of 60%-50%.Carbon fiber length is 1-3mm.
Kaolinic composition is based on kaolinite, and content is about 90%, and granularity is less than 22mm; Have that whiteness is high, matter is soft, suspend in water, good plasticity-and high cohesiveness, excellent electrical insulating property, antiacid dissolubility, resistivity against fire and low cation exchange capacity.
Stirring velocity is 40-60n/min.
The irradiation power of ultrasonic wave homogenizing is 1500-2000w, and irradiation time is 10-25min.
A kind of preparation method with the Carbon foam of withstand voltage shock absorbing characteristics of the present invention, production technique is simple, and flow process is short, easily-controlled operation, and cost is low, is beneficial to large-scale promotion application.
Embodiment
Embodiment 1:
Following component and mass percent thereof are in harmonious proportion and form:
Above component summation is 100%.
Embodiment 2:
Following component and mass percent thereof are in harmonious proportion and form:
Above component summation is 100%.
Embodiment 3:
Following component and mass percent thereof are in harmonious proportion and form:
Above component summation is 100%.
The main performance index of the finished product of embodiment 2:
| Volume density g/cm 3 | 0.32-0.58 |
| Ultimate compression strength MPa | 25-36 |
| Tensile strength | 2-7Mpa |
| Compression modulus | 480-689MPa |
| Tensile modulus | 610-860MP |
| Void content % | 76-85 |
| Folding strength MPa | 0.8-1.5 |
| Specific heat: KJ/Kg. DEG C | 0.73(100℃)，1.47(1000℃) |
| Thermal expansivity | 1.25-3.5×10 -6.c -1 |
| Thermal conductivity KJ/m.h. DEG C | 0.64(100℃)；10.5×10 -6(1000℃) |
| Mean pore size/μ .m | 60-80 |
| Specific surface area/(cm 2/cm 3) | 610-878 |
| Volume specific resistance/Ω .cm | Longitudinal 0.034-0.06, horizontal 0.043-0.096 |
Claims (1)
1. there is a preparation method for the Carbon foam of withstand voltage shock absorbing characteristics, it is characterized in that:
Feed composition and mass percent are:
Vacuum residuum 69.5%, whipping agent 5%, modified starch, white mica 8%, white sugar 3%,
White kaolin 4%, carbon fiber 8.5%, nickelous nitrate 2%;
Wherein:
Whipping agent is the azo-compound of mass ratio 50% and the sulfonyl hydrazines compound of 50%;
Carbon fiber length is 1-3mm;
Kaolinic composition based on kaolinite, content 90%, granularity is less than 22mm; Have that whiteness is high, matter is soft, suspend in water, good plasticity-and high cohesiveness, excellent electrical insulating property, antiacid dissolubility, resistivity against fire and low cation exchange capacity;
Step of preparation process is:
By the at room temperature disposable integral mixing of all raw materials, stir and be heated to 130-150 DEG C, then use ultrasonic wave homogenizing; Stirring velocity is 40-60n/min, and the irradiation power of homogenizing is 1500-2000w, and irradiation time is 10-25min; Pulpous state precursor is obtained after homogenizing;
(2), under keeping temperature 55-65 DEG C of state, pulpous state precursor is put into mould and enrich; The tubular type heating container being full of industrial nitrogen put into by whole mould, and heating is cured pre-treatment, and in maintenance heating container, nitrogen pressure is at 5-8kPa;
(3) rate of heating controls: at the uniform velocity rise to 130-150 DEG C from room temperature 2-4h, insulation 2-3h; Then be heated to 1100-1200 DEG C, insulation 3-4h, heat-up rate 2-3 DEG C/min; Then continue intensification and carry out graphitization processing, rate of heating controls at 18-25 DEG C/min, and temperature controls at 2500-2800 DEG C, and cool after insulation 1.5-2h, cooling rate controls at 15-20 DEG C/min, to room temperature, obtain product;
The Carbon foam technical indicator with withstand voltage shock absorbing characteristics obtained is:
Volume density 0.32-0.58 g/cm
3, ultimate compression strength 25-36MPa, tensile strength 2-7MPa,
Compression modulus 480-689MPa, tensile modulus 610-860MP, void content 76-85%, folding strength 0.8-1.5MPa, specific heat: 0.73 KJ/Kg. DEG C at 100 DEG C, 1.47KJ/Kg. DEG C at 1000 DEG C, thermal expansivity 1.25-3.5 × 10
-6.c
-1, 0.64 KJ/m.h. DEG C at thermal conductivity 100 DEG C, at 1000 DEG C 10.5 × 10
-6kJ/m.h. DEG C, mean pore size 60-80/μ .m, specific surface area 610-878 cm
2/ cm
3, volume specific resistance: longitudinal 0.034-0.06, horizontal 0.043-0.096/ Ω .cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072243.1A CN103101904B (en) | 2013-03-06 | 2013-03-06 | Preparation method of foam carbon with pressure-resistant and shock-absorbing characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072243.1A CN103101904B (en) | 2013-03-06 | 2013-03-06 | Preparation method of foam carbon with pressure-resistant and shock-absorbing characteristics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103101904A CN103101904A (en) | 2013-05-15 |
| CN103101904B true CN103101904B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310072243.1A Expired - Fee Related CN103101904B (en) | 2013-03-06 | 2013-03-06 | Preparation method of foam carbon with pressure-resistant and shock-absorbing characteristics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103101904B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106698415A (en) * | 2016-12-29 | 2017-05-24 | 陈大明 | High-strength carbon foam (CF) material and preparation method thereof |
| CN109553416A (en) * | 2018-12-15 | 2019-04-02 | 华南理工大学 | A kind of preparation method of foamy carbon |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587033A (en) * | 2004-09-10 | 2005-03-02 | 东华大学 | Process for preparing asphalt foam material |
| CN102502575B (en) * | 2011-10-24 | 2013-10-30 | 上海理工大学 | Method for preparing carbon foam by using foaming agent |
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| Publication number | Publication date |
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| CN103101904A (en) | 2013-05-15 |
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