CN102181030A - Method for preparing corncob-base polyurethane rigid foam damping material - Google Patents
Method for preparing corncob-base polyurethane rigid foam damping material Download PDFInfo
- Publication number
- CN102181030A CN102181030A CN 201110086889 CN201110086889A CN102181030A CN 102181030 A CN102181030 A CN 102181030A CN 201110086889 CN201110086889 CN 201110086889 CN 201110086889 A CN201110086889 A CN 201110086889A CN 102181030 A CN102181030 A CN 102181030A
- Authority
- CN
- China
- Prior art keywords
- liquefied product
- corn cob
- rigid foam
- weight part
- polyurethane foam
- 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.)
- Granted
Links
Images
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention discloses a method for preparing corncob-base polyurethane rigid foam damping material. The method includes the steps as follows: liquefying ground and screened corncobs by the mixed agent of polyethylene glycol 400 and glycerol to obtain a liquefied product; adding magnesium oxide to neutralize the liquefied product; and then allowing the liquefied product to polymerize with PAPI (polyphenylmethane polyisocyanate), thus forming the polyurethane rigid foam damping material. In the invention, renewable resources are utilized, the liquefying cost is lowered; the density of the synthesized polyurethane rigid foam damping material is adjustable within the range of 50-200kg/m3, the compressive strength achieves 100-2000kPa, the coefficient of heat conductivity is smaller than or equal to 0.050w/(m DEG C), the damping coefficient is greater than or equal to 0.3 and the temperature range is wide. The product has broad application prospect and remarkable environmental and social benefits.
Description
Technical field
The present invention relates to a kind of method for preparing corn cob based polyurethanes rigid foam damping material.
Background technology
Polyurethane foam because of it has excellent specific tenacity, thermal characteristic and good processing properties, has been widely used in every field such as communications and transportation, building, furniture and packing as a family macromolecule material.
At present the preparation polyurethane foamed material mainly is polyvalent alcohol and the reaction of isocyanic ester generation addition polycondensation that is obtained by petroleum chemicals and getting.Yet, had a strong impact on the raw material sources of polyurethane industrial, and then influenced the development of polyurethane industrial along with petroleum resources are exhausted day by day.
With this renewable energy source of biomass cheap and easy to get is raw material, after certain technical qualification liquefaction, obtain containing the fluent meterial of hydroxyl, with polyethers or the polyester polyol that its alternative petroleum chemicals obtain, the polyurethane foamed material that preparation has various performances becomes one of focus of current polyurethane industrial research.Normal pressure liquefaction is wherein a kind of common biomass liquefying method.Having liquefaction pressure is normal pressure, temperature of reaction is lower, speed of response is fast, promptly can be used as advantages such as synthesis of polyurethane foam after simple process.But wherein the problem of Cun Zaiing be liquefying agent such as NSC 11801 etc. in liquefaction process owing to resolve into CO
2And reasons such as volatilization cause a large amount of losses, have improved the liquefaction cost; The price of liquefying agent poly(oxyethylene glycol) 400 is higher; Higher etching apparatus of deliquescence accelerant vitriol oil concentration and contaminate environment; Liquefying time is longer; Problems such as the direct synthesis of polyurethane foamy of undressed liquefaction polyvalent alcohol poor performance.Therefore seek the deliquescence accelerant of cheap liquefying agent, lower concentration, simple processing mode to reduce the liquefaction cost, improving the polyurethane foam performance is the problem that biomass-based polyurethane foam technology presses for solution.
Summary of the invention
The purpose of this invention is to provide a kind of method for preparing hard polyurethane foam.
The method for preparing hard polyurethane foam provided by the present invention comprises the steps:
1) liquefaction solvent, deliquescence accelerant and corn cob are mixed, reacted 30-90 minute down at 130-160 ℃, reaction finishes postcooling, obtains liquefied product; Wherein, described liquefaction solvent is the mixed solvent of glycerol and poly(oxyethylene glycol) 400;
2) in described liquefied product, add magnesium oxide, then mixed solution is placed 8-12h, the liquefied product after obtaining handling down at 105 ℃-120 ℃;
3) liquefied product after the described processing and dibutyl tin laurate, triethylamine and silicone oil are stirred, again to wherein adding PAPI, it is milky white to continue to be stirred to appearance; Pour foaming, slaking in the mould then into, obtain hard polyurethane foam.
Wherein, in the step 1), the mass ratio of glycerol and poly(oxyethylene glycol) 400 can be 1/4-9/1 in the described liquefaction solvent; It is 35% hydrochloric acid that described deliquescence accelerant specifically can be sulfuric acid that mass concentration is 72%-98% or mass concentration.
The mass ratio of described liquefaction solvent, deliquescence accelerant and corn cob can be (90-150): (4.2-10.0): 30.
In the step 1), described corn cob is the ground corn core, and particle diameter is the 20-80 order.
The concrete addition sequence of described liquefaction solvent, deliquescence accelerant and corn cob is: earlier liquefaction solvent and deliquescence accelerant are mixed, be heated to 130-160 ℃ after, add corn cob again.
Step 2) in, add magnesium oxide with the unnecessary acid catalyst that neutralizes, described liquefied product and magnesian mass ratio can be 100: (1-4).
In the step 3), the mass ratio of liquefied product after the described processing, dibutyl tin laurate, triethylamine, silicone oil and PAPI (polyphenyl polymethylene polyisocyanates, the trade mark are PM-200) is followed successively by (50-60): (0.2-0.3): (0.2-0.3): (0.45-0.55): (50-60).
In the step 3), the temperature of described foaming is a room temperature, and foamed time is 10-360s; The temperature of described slaking is 40-60 ℃, and the curing time is 2-4h.The rotating speed of described stirring can be 1100-1300r/min.
The present invention utilizes renewable resources, has reduced the liquefaction cost, and synthesis of polyurethane hard foam density is at 50-200kg/m
3Adjustable, compressive strength reaches 100-2000kPa, and thermal conductivity is smaller or equal to 0.050w/ (m ℃), and ratio of damping is bigger more than or equal to 0.3 warm territory scope.Product has broad application prospects, and significant environment and social benefit are arranged.
The present invention compares with existing preparation polyurethane foam has following advantage and effect:
1) the inventive method has comparatively significantly cost advantage.Corn cob is cheap and easy to get, and is renewable resources.In addition, this method liquefying time is shorter, and catalyst levels is few during the synthesis of polyurethane foam, and does not use any whipping agent that adds, and therefore, can reduce production costs.
2) liquefied product is neutralized with magnesium oxide, improved liquefied product synthesis of polyurethane foamy performance.With magnesium oxide liquefied product is carried out neutralizing treatment, solved direct with the bubble that collapses of as easy as rolling off a log generation in the liquefied product synthesis of polyurethane foam process, problem such as synthetic polyurethane foam abscess is thick, inhomogeneous.
Description of drawings
Fig. 1 is the damping temperature characteristics figure of the corn cob based polyurethanes rigid foam damping material of embodiment 1 preparation.
Fig. 2 is the damping temperature characteristics figure of the corn cob based polyurethanes rigid foam damping material of embodiment 2 preparations.
Fig. 3 is the damping temperature characteristics figure of the corn cob based polyurethanes rigid foam damping material of embodiment 3 preparations.
Fig. 4 is the damping temperature characteristics figure of the corn cob based polyurethanes rigid foam damping material of embodiment 4 preparations.
Fig. 5 is the damping temperature characteristics figure of the corn cob based polyurethanes rigid foam damping material of embodiment 5 preparations.
Fig. 6 is the damping temperature characteristics figure of the corn cob based polyurethanes rigid foam damping material of embodiment 6 preparations.
Embodiment
Below by specific embodiment method of the present invention is described, but the present invention is not limited thereto.
Experimental technique described in the following embodiment if no special instructions, is ordinary method; Described reagent and material if no special instructions, all can obtain from commercial channels.
Used PAPI is available from the magnificent urethane in Yantai ten thousand company limited among the embodiment, trade mark PM-200, and dark-brown liquid, functionality is 2.6～2.7, and isocyano-content is 30.5%～32.0%, and flash-point is 230 ℃, and burning-point is 245 ℃.
Silicone oil is purchased in being the Beijing Chemical Plant.
Embodiment 1, preparation corn cob based polyurethanes rigid foam
With 96 weight part poly(oxyethylene glycol) 400,24 weight part glycerol and 8.4 weight part mass concentrations is that 72% sulfuric acid adds in the reaction vessel, stir, be warming up to 160 ℃, add 30 parts of corn cobs (particle diameter 20-80 order) through pulverizing, stirring reaction 60min, immediately with the cold water cooling, obtain liquefied product after the taking-up.
Take out the above-mentioned liquefied product of 100 weight parts, add in the 1.5 weight part magnesium oxide and unnecessary acid, place 10h to remove moisture down at 105 ℃ then.Liquefied product after getting 50 weight parts and handling is in dixie cup, add 0.26 weight part dibutyl tin laurate, 0.24 weight part triethylamine and 0.51 weight part silicone oil simultaneously, under the 1300r/min rotating speed, stir 60s, the PAPI that adds 50 weight parts again, pour in the mould natural foaming 6min, the demoulding rapidly into after under identical rotating speed, stirring 30s (occurring milky white), place 50 ℃ of following slaking 4h, obtain the hard polyurethane foam damping material.
The hard polyurethane foam density that makes is 79.83kg/m
3, compressive strength 493.95kPa, thermal conductivity 0.037W/ (m ℃).The damping characteristic of this material as shown in Figure 1, X-coordinate is the probe temperature of material among the figure, ordinate zou is a damping loss factor, testing tool is the DMA Q800 dynamic thermomechanical analysis apparatus that U.S. TA company produces.The ratio of damping of this material is 74.22 ℃-141.85 ℃ more than or equal to 0.3 warm territory scope as seen from the figure, and the maximum value of ratio of damping is 0.79, has the warm territory of broad.
With 80 weight part poly(oxyethylene glycol) 400,40 weight part glycerol and 4.2 weight part concentration is that 98% sulfuric acid adds in the reaction vessel, stir, be warming up to 130 ℃, add 30 parts of corn cobs (particle diameter 20-80 order) through pulverizing, stirring reaction 60min, immediately with the cold water cooling, obtain liquefied product after the taking-up.
Take out the above-mentioned liquefied product of 100 weight parts, add in the 2 weight part magnesium oxide and unnecessary acid, place 12h to remove moisture down at 105 ℃ then.Liquefied product after getting 50 weight parts and handling is in dixie cup, add 0.25 weight part dibutyl tin laurate, 0.26 weight part triethylamine and 0.48 weight part silicone oil simultaneously, under the 1200r/min rotating speed, stir 60s, the PAPI that adds 50 weight parts again, pour in the mould natural foaming 30s, the demoulding rapidly into after under identical rotating speed, stirring 20s (occurring milky white), place 50 ℃ of following slaking 3h, obtain the hard polyurethane foam damping material.
The hard polyurethane foam density that makes is 123.77kg/m
3, compressive strength 253.97kPa, thermal conductivity 0.039W/ (m ℃), damping characteristic as shown in Figure 2, X-coordinate is the probe temperature of material, ordinate zou is a damping loss factor, testing tool is the DMA Q800 dynamic thermomechanical analysis apparatus that U.S. TA company produces.The ratio of damping of this material is 29.09 ℃-76.01 ℃ more than or equal to 0.3 warm territory scope as seen from the figure, and the maximum value of ratio of damping is 0.36, has the warm territory of broad.
Embodiment 3, preparation corn cob based polyurethanes rigid foam
With 12 weight part poly(oxyethylene glycol) 400,108 weight part glycerol and 4.2 weight part concentration is that 98% sulfuric acid adds in the reaction vessel, stir, be warming up to 160 ℃, add 30 parts of corn cobs (particle diameter 20-80 order) through pulverizing, stirring reaction 60min, immediately with the cold water cooling, obtain liquefied product after the taking-up.
Take out the above-mentioned liquefied product of 100 weight parts, add in the 2 weight part magnesium oxide and unnecessary acid, place 11h to remove moisture down at 105 ℃ then.Liquefied product after getting 50 weight parts and handling is in dixie cup, add 0.27 weight part dibutyl tin laurate, 0.24 weight part triethylamine and 0.53 weight part silicone oil simultaneously, under the 1000r/min rotating speed, stir 60s, the PAPI that adds 50 weight parts again, pour in the mould natural foaming 5min, the demoulding rapidly into after under identical rotating speed, stirring 60s (occurring milky white), place 55 ℃ of following slaking 3h, obtain the hard polyurethane foam damping material.
The hard polyurethane foam density that makes is 145.68kg/m
3, compressive strength 407.328kPa, thermal conductivity 0.042W/ (m ℃), damping characteristic as shown in Figure 3, X-coordinate is the probe temperature of material, ordinate zou is a damping loss factor, testing tool is the DMA Q800 dynamic thermomechanical analysis apparatus that U.S. TA company produces.The ratio of damping of this material is 117.06 ℃-151.69 ℃ more than or equal to 0.3 warm territory scope as seen from the figure, and the maximum value of ratio of damping is 0.43, has the warm territory of broad.
Embodiment 4, preparation corn cob based polyurethanes rigid foam
With 96 weight part poly(oxyethylene glycol) 400,24 weight part glycerol and 4.2 weight part concentration is that 98% sulfuric acid adds in the reaction vessel, stir, be warming up to 150 ℃, add 30 parts of corn cobs (particle diameter 20-80 order) through pulverizing, stirring reaction 30min, immediately with the cold water cooling, obtain liquefied product after the taking-up.
Take out the above-mentioned liquefied product of 100 weight parts, add in the 4 weight part magnesium oxide and unnecessary acid, place 12h to remove moisture down at 105 ℃ then.Liquefied product after getting 50 weight parts and handling is in dixie cup, add 0.23 weight part dibutyl tin laurate, 0.26 weight part triethylamine and 0.50 weight part silicone oil simultaneously, under the 900r/min rotating speed, stir 60s, the PAPI that adds 50 weight parts again, pour in the mould natural foaming 30s, the demoulding rapidly into after under identical rotating speed, stirring 70s (occurring milky white), place 60 ℃ of following slaking 2h, obtain the hard polyurethane foam damping material.
The hard polyurethane foam density that makes is 77.70kg/m
3, compressive strength 258.45kPa, thermal conductivity 0.037W/ (m ℃), damping characteristic as shown in Figure 4, X-coordinate is the probe temperature of material, ordinate zou is a damping loss factor, testing tool is the DMA Q800 dynamic thermomechanical analysis apparatus that U.S. TA company produces.The ratio of damping of this material is 88.51 ℃-132.60 ℃ more than or equal to 0.3 warm territory scope as seen from the figure, and the maximum value of ratio of damping is 0.58, has the warm territory of broad.
Embodiment 5, preparation corn cob based polyurethanes rigid foam
72 weight part poly(oxyethylene glycol) 400,18 weight part glycerol and 5.4 weight part concentrated hydrochloric acids are added in the reaction vessel, stir, be warming up to 160 ℃, add 30 parts of corn cobs (particle diameter 20-80 order) through pulverizing, stirring reaction 60min immediately with the cold water cooling, obtains liquefied product after the taking-up.
Take out the above-mentioned liquefied product of 100 weight parts, add in the 3 weight part magnesium oxide and unnecessary acid, place 12h to remove moisture down at 110 ℃ then.Liquefied product after getting 50 weight parts and handling is in dixie cup, add 0.2 weight part dibutyl tin laurate, 0.3 weight part triethylamine and 0.45 weight part silicone oil simultaneously, under the 1100r/min rotating speed, stir 60s, the PAPI that adds 60 weight parts again, pour in the mould natural foaming 10s, the demoulding rapidly into after under identical rotating speed, stirring 17s (occurring milky white), place 60 ℃ of following slaking 3h, obtain the hard polyurethane foam damping material.
The hard polyurethane foam density that makes is 170.25kg/m
3, compressive strength 1731.32kPa, thermal conductivity 0.047W/ (m ℃), damping characteristic as shown in Figure 5, X-coordinate is the probe temperature of material, ordinate zou is a damping loss factor, testing tool is the DMA Q800 dynamic thermomechanical analysis apparatus that U.S. TA company produces.The ratio of damping of this material is 103.48 ℃-149.07 ℃ more than or equal to 0.3 warm territory scope as seen from the figure, and the maximum value of ratio of damping is 0.46, has the warm territory of broad, and use range is wide.
Embodiment 6, preparation corn cob based polyurethanes rigid foam
With 121.5 weight part poly(oxyethylene glycol) 400,37.5 weight part glycerol and 5.0 weight part concentration is that 85% the vitriol oil adds in the reaction vessel, stir, be warming up to 140 ℃, add 30 parts of corn cobs (particle diameter 20-80 order) through pulverizing, stirring reaction 90min, immediately with the cold water cooling, obtain liquefied product after the taking-up.
Take out the above-mentioned liquefied product of 100 weight parts, add in the 3.5 weight part magnesium oxide and unnecessary acid, place 8h to remove moisture down at 120 ℃ then.Liquefied product after getting 60 weight parts and handling is in dixie cup, add 0.3 weight part dibutyl tin laurate, 0.2 weight part triethylamine and 0.55 weight part silicone oil simultaneously, under the 1150r/min rotating speed, stir 60s, the PAPI that adds 50 weight parts again, pour in the mould natural foaming 19s, the demoulding rapidly into after under identical rotating speed, stirring 13s (occurring milky white), place 60 ℃ of following slaking 3h, obtain the hard polyurethane foam damping material.
The hard polyurethane foam density that makes is 88.36kg/m
3, compressive strength 346.85kPa, thermal conductivity 0.037W/ (m ℃), damping characteristic as shown in Figure 6, X-coordinate is the probe temperature of material, ordinate zou is a damping loss factor, testing tool is the DMA Q800 dynamic thermomechanical analysis apparatus that U.S. TA company produces.The ratio of damping of this material is 99.85 ℃-143.05 ℃ more than or equal to 0.3 warm territory scope as seen from the figure, and the maximum value of ratio of damping is 0.59, has the warm territory of broad.
Claims (10)
1. a method for preparing hard polyurethane foam comprises the steps:
1) liquefaction solvent, deliquescence accelerant and corn cob are mixed, reacted 30-60 minute down at 130-160 ℃, reaction finishes postcooling, obtains liquefied product; Wherein, described liquefaction solvent is the mixed solvent of glycerol and poly(oxyethylene glycol) 400;
2) in described liquefied product, add magnesium oxide, then mixed solution is placed 8-12h, the liquefied product after obtaining handling down at 105 ℃-120 ℃;
3) liquefied product after the described processing and dibutyl tin laurate, triethylamine and silicone oil are stirred, again to wherein adding PAPI, it is milky white to continue to be stirred to appearance; Pour foaming, slaking in the mould then into, obtain hard polyurethane foam.
2. method according to claim 1 is characterized in that: in the step 1), the mass ratio of described liquefaction solvent, deliquescence accelerant and corn cob is (90-150): (4.2-10.0): 30.
3. method according to claim 1 and 2 is characterized in that: in the step 1), the mass ratio of glycerol and poly(oxyethylene glycol) 400 is 1/4-9/1 in the described liquefaction solvent; Described deliquescence accelerant is that the aqueous sulfuric acid of mass concentration 72%-98% or mass concentration are 35% aqueous hydrochloric acid.
4. according to each described method among the claim 1-3, it is characterized in that: in the step 1), described corn cob is the ground corn core, and particle diameter is the 20-80 order.
5. according to each described method among the claim 1-4, it is characterized in that: in the step 1), the addition sequence of described liquefaction solvent, deliquescence accelerant and corn cob is: earlier liquefaction solvent and deliquescence accelerant are mixed, be heated to 130-160 ℃ after, add corn cob again.
6. according to each described method among the claim 1-5, it is characterized in that: step 2) in, described liquefied product and magnesian mass ratio are 100: (1-4).
7. according to each described method among the claim 1-6, it is characterized in that: in the step 3), the mass ratio of the liquefied product after the described processing, dibutyl tin laurate, triethylamine, silicone oil and PAPI is followed successively by (50-60): (0.2-0.3): (0.2-0.3): (0.45-0.55): (50-60).
8. according to each described method among the claim 1-7, it is characterized in that: in the step 3), the temperature of described foaming is a room temperature, and foamed time is 10-360s; The temperature of described slaking is 40-60 ℃, and the curing time is 2-4h.
9. according to each described method among the claim 1-8, it is characterized in that: in the step 3), the rotating speed of described stirring is 1100-1300r/min.
10. the hard polyurethane foam that each described method prepares among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110086889A CN102181030B (en) | 2011-04-07 | 2011-04-07 | Method for preparing corncob-base polyurethane rigid foam damping material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110086889A CN102181030B (en) | 2011-04-07 | 2011-04-07 | Method for preparing corncob-base polyurethane rigid foam damping material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102181030A true CN102181030A (en) | 2011-09-14 |
| CN102181030B CN102181030B (en) | 2012-09-26 |
Family
ID=44567339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110086889A Expired - Fee Related CN102181030B (en) | 2011-04-07 | 2011-04-07 | Method for preparing corncob-base polyurethane rigid foam damping material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102181030B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443130A (en) * | 2011-10-21 | 2012-05-09 | 中国农业大学 | Biomass-based polyurethane foam containing vegetable oil residue and preparation method of biomass-based polyurethane foam |
| CN102443127A (en) * | 2011-10-17 | 2012-05-09 | 中国农业大学 | Method for preparing biodegradable polyurethane foam from industrial capsicum waste residue |
| CN102504164A (en) * | 2011-11-22 | 2012-06-20 | 中国农业大学 | Manufacture method of enhanced corncob base polyurethane foam materials |
| CN102532457A (en) * | 2012-02-09 | 2012-07-04 | 中国农业大学 | Method for synthesizing degradable polyurethane by using corncob and industrial capsicum waste residue |
| CN102604027A (en) * | 2012-03-09 | 2012-07-25 | 中国农业大学 | Polyurethane foam damping material and preparation method for same |
| CN103626948A (en) * | 2013-11-26 | 2014-03-12 | 北京联合大学生物化学工程学院 | Polyurethane foam material synthesized from plant polyols |
| CN103833949A (en) * | 2012-11-26 | 2014-06-04 | 中国农业大学 | Preparation method of polyurethane foam |
| CN104530446A (en) * | 2015-01-06 | 2015-04-22 | 青岛科技大学 | Method for preparing polyether polyol by liquifying and modifying peanut shells |
| CN103601866B (en) * | 2013-11-26 | 2015-11-04 | 北京联合大学生物化学工程学院 | A kind of method utilizing plant polyatomic alcohol synthesis of polyurethane foam materials |
| CN106008890A (en) * | 2016-06-25 | 2016-10-12 | 仇颖超 | Preparation method of flame-retardant hard polyurethane foam |
| CN110483737A (en) * | 2019-07-30 | 2019-11-22 | 江南大学 | Bionical spectral simulation material and preparation method with three-dimensional porous structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144075A (en) * | 2006-09-15 | 2008-03-19 | 许雷 | Method for degrading pyrethrins pesticide by magnetic polyurethane foam plastic immobilized cell |
| CN101362818A (en) * | 2008-09-12 | 2009-02-11 | 南昌大学 | Method for preparing biodegradable polyurethane rigid foam from bamboo waste liquefaction products |
| CN101503338A (en) * | 2009-03-25 | 2009-08-12 | 中国农业大学 | Rapid liquefaction method for corps wastes by microwave heating catalysis |
| CN101643513A (en) * | 2009-08-28 | 2010-02-10 | 华南理工大学 | Plant-fiber-base polyether ester polylol, and preparation method and applications thereof |
-
2011
- 2011-04-07 CN CN201110086889A patent/CN102181030B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144075A (en) * | 2006-09-15 | 2008-03-19 | 许雷 | Method for degrading pyrethrins pesticide by magnetic polyurethane foam plastic immobilized cell |
| CN101362818A (en) * | 2008-09-12 | 2009-02-11 | 南昌大学 | Method for preparing biodegradable polyurethane rigid foam from bamboo waste liquefaction products |
| CN101503338A (en) * | 2009-03-25 | 2009-08-12 | 中国农业大学 | Rapid liquefaction method for corps wastes by microwave heating catalysis |
| CN101643513A (en) * | 2009-08-28 | 2010-02-10 | 华南理工大学 | Plant-fiber-base polyether ester polylol, and preparation method and applications thereof |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443127A (en) * | 2011-10-17 | 2012-05-09 | 中国农业大学 | Method for preparing biodegradable polyurethane foam from industrial capsicum waste residue |
| CN102443130A (en) * | 2011-10-21 | 2012-05-09 | 中国农业大学 | Biomass-based polyurethane foam containing vegetable oil residue and preparation method of biomass-based polyurethane foam |
| CN102504164B (en) * | 2011-11-22 | 2013-10-16 | 中国农业大学 | Manufacture method of enhanced corncob base polyurethane foam materials |
| CN102504164A (en) * | 2011-11-22 | 2012-06-20 | 中国农业大学 | Manufacture method of enhanced corncob base polyurethane foam materials |
| CN102532457A (en) * | 2012-02-09 | 2012-07-04 | 中国农业大学 | Method for synthesizing degradable polyurethane by using corncob and industrial capsicum waste residue |
| CN102532457B (en) * | 2012-02-09 | 2013-10-02 | 中国农业大学 | Method for synthesizing degradable polyurethane by using corncob and industrial capsicum waste residue |
| CN102604027A (en) * | 2012-03-09 | 2012-07-25 | 中国农业大学 | Polyurethane foam damping material and preparation method for same |
| CN102604027B (en) * | 2012-03-09 | 2013-10-16 | 中国农业大学 | Polyurethane foam damping material and preparation method for same |
| CN103833949A (en) * | 2012-11-26 | 2014-06-04 | 中国农业大学 | Preparation method of polyurethane foam |
| CN103833949B (en) * | 2012-11-26 | 2016-03-02 | 中国农业大学 | A kind of preparation method of polyurethane foam |
| CN103626948A (en) * | 2013-11-26 | 2014-03-12 | 北京联合大学生物化学工程学院 | Polyurethane foam material synthesized from plant polyols |
| CN103601866B (en) * | 2013-11-26 | 2015-11-04 | 北京联合大学生物化学工程学院 | A kind of method utilizing plant polyatomic alcohol synthesis of polyurethane foam materials |
| CN104530446A (en) * | 2015-01-06 | 2015-04-22 | 青岛科技大学 | Method for preparing polyether polyol by liquifying and modifying peanut shells |
| CN106008890A (en) * | 2016-06-25 | 2016-10-12 | 仇颖超 | Preparation method of flame-retardant hard polyurethane foam |
| CN110483737A (en) * | 2019-07-30 | 2019-11-22 | 江南大学 | Bionical spectral simulation material and preparation method with three-dimensional porous structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102181030B (en) | 2012-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102181030B (en) | Method for preparing corncob-base polyurethane rigid foam damping material | |
| CN101787203B (en) | Composite material adopting pentafluorobutane as foaming agent for solar water heater and preparation method thereof | |
| CN102504164B (en) | Manufacture method of enhanced corncob base polyurethane foam materials | |
| Fan et al. | Properties of biobased rigid polyurethane foams reinforced with fillers: microspheres and nanoclay | |
| CN104530383A (en) | Method for preparing polyurethane foam through rice straw and prepared polyurethane foam | |
| CN103694435B (en) | Spary coating type pipeline special environment friendly combined polyether and preparation method thereof | |
| CN102079803A (en) | Full-water-type combined polyether and application method thereof, and polyurethane rigid foam composition | |
| CN104479101A (en) | Method for directly preparing polyurethane foam by adopting rice straw as raw material and prepared polyurethane foam | |
| CN113429540B (en) | Method for preparing polyurethane thermal insulation material by degrading waste polyurethane with polyol alcoholysis agent | |
| CN108129630A (en) | A kind of no-solvent type monocomponent polyurethane grouting material and preparation method thereof | |
| CN107353389A (en) | A kind of biomass-based hard polyurethane foams of high opening rate and preparation method thereof | |
| CN103626949A (en) | Polyurethane foam, and raw material composition, combined polyether and application thereof | |
| CN104876629A (en) | Silicate fireproof thermal insulation material and preparation method thereof | |
| CN104530361B (en) | Composition, rigid polyurethane foam and refrigeration plant | |
| CN101280049B (en) | Degradable polyurethane foam material made from straw and preparation thereof | |
| JPH11201628A (en) | Heat insulation case for refrigerator | |
| CN103601866B (en) | A kind of method utilizing plant polyatomic alcohol synthesis of polyurethane foam materials | |
| CN111454427A (en) | Full-water foaming biomass-based rigid polyurethane foam and preparation method thereof | |
| CN113754850A (en) | Polyurethane foam and preparation method and application thereof | |
| WO2024016743A1 (en) | Rigid polyurethane foam, preparation method therefor, and thermal insulation material, refrigerator or freezer comprising rigid polyurethane foam | |
| CN101948563B (en) | Pentane type composite polyether and composition containing same, rigid polyurethane rigid foam and application thereof | |
| CN101544737A (en) | Rigid polyurethane foam and preparation method thereof | |
| Li et al. | Structures and physical properties of rigid polyurethane foams with water as the sole blowing agent | |
| CN106832212B (en) | Storage-type electric water heater polyurethane rigid foam material and preparation method thereof | |
| CN113150230B (en) | Thermal insulation polyurethane plastic and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20160407 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |