CN118047928A - Preparation method of high-reinforcement heat-resistant soft polyurethane foam - Google Patents
Preparation method of high-reinforcement heat-resistant soft polyurethane foam Download PDFInfo
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- CN118047928A CN118047928A CN202410156146.9A CN202410156146A CN118047928A CN 118047928 A CN118047928 A CN 118047928A CN 202410156146 A CN202410156146 A CN 202410156146A CN 118047928 A CN118047928 A CN 118047928A
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- 229920005830 Polyurethane Foam Polymers 0.000 title claims abstract description 48
- 239000011496 polyurethane foam Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229920005610 lignin Polymers 0.000 claims abstract description 60
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 43
- 239000006260 foam Substances 0.000 claims abstract description 19
- -1 polyoxyethylene Polymers 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 15
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 13
- 239000004970 Chain extender Substances 0.000 claims abstract description 11
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- 239000003381 stabilizer Substances 0.000 claims abstract description 11
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 10
- 229920000570 polyether Polymers 0.000 claims abstract description 10
- 229920005862 polyol Polymers 0.000 claims abstract description 10
- 150000003077 polyols Chemical class 0.000 claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 239000012948 isocyanate Substances 0.000 claims abstract description 7
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 21
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 claims description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000000967 suction filtration Methods 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- 238000001291 vacuum drying Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 5
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 4
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 4
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 4
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 4
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 3
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 claims description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 3
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 3
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 claims description 3
- JHYKJJIJPWNOME-UHFFFAOYSA-N 1,4a,8-triazido-2,3,4,5,6,7-hexahydro-1H-naphthalene Chemical compound N(=[N+]=[N-])C12CCCC(=C2C(CCC1)N=[N+]=[N-])N=[N+]=[N-] JHYKJJIJPWNOME-UHFFFAOYSA-N 0.000 claims description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 2
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 claims description 2
- 150000001412 amines Chemical group 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 abstract description 15
- 229920002635 polyurethane Polymers 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 10
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 239000006261 foam material Substances 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 238000005054 agglomeration Methods 0.000 abstract 1
- 230000002776 aggregation Effects 0.000 abstract 1
- 230000004888 barrier function Effects 0.000 abstract 1
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000002105 nanoparticle Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical class O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 235000013824 polyphenols Nutrition 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical group NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical group NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 125000001951 carbamoylamino group Chemical group C(N)(=O)N* 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- UURSXESKOOOTOV-UHFFFAOYSA-N dec-5-ene Chemical compound CCCCC=CCCCC UURSXESKOOOTOV-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 229910017059 organic montmorillonite Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- AVWRKZWQTYIKIY-UHFFFAOYSA-N urea-1-carboxylic acid Chemical group NC(=O)NC(O)=O AVWRKZWQTYIKIY-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention relates to the technical field of foam material production, in particular to a preparation method of high-strength heat-resistant soft polyurethane foam; the high-strength heat-resistant soft polyurethane foam is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyether polyol, 3.2 to 5 parts of foaming agent, 1 to 4 parts of foam stabilizer, 0.3 to 2 parts of catalyst, 5 to 20 parts of chain extender, 2 to 16 parts of graphene oxide, 1 to 8 parts of lignin, 0.3 to 2.4 parts of polyoxyethylene and 60 to 100 parts of isocyanate; the invention solves the agglomeration problem of lignin and graphene oxide; the polyurethane soft foam containing the Lignin/GO on the molecular chain is prepared by a one-step foaming method, the size of the foam holes is effectively reduced, the foam strength is improved, meanwhile, the Lignin/GO can capture free radicals generated in the thermal oxidation aging process, the layered GO nano particles can prevent the permeation and diffusion of heat and oxygen, the labyrinth barrier effect is exerted, and the Lignin/GO has high enhancement and unique thermal stability, so that the polyurethane foam has high mechanical strength and thermal stability, and the molecular degradation is delayed.
Description
Technical Field
The invention relates to the technical field of foam material production, in particular to a preparation method of high-reinforced heat-resistant soft polyurethane foam.
Background
Polyurethane (PU) is a high polymer with a main chain containing a urethane group repeating structural unit, and is a high polymer material with excellent comprehensive performance, wherein flexible polyurethane foam plastic is an important variety of the polyurethane foam plastic, has the characteristics of light weight, high rebound, heat preservation, sound insulation, high specific strength and the like, and is mainly applied to the fields of furniture, automobile industry, packaging materials, electronic information, heat preservation and heat insulation materials and the like. However, because of the existence of heat-labile groups such as ureido, allophanate, carbamate and biuret in the polyurethane foam system, the polyurethane foam system has poor heat resistance, is easy to soften and degrade at high temperature, has rapid decay of mechanical property, and cannot meet the requirement of high heat resistance of the flexible polyurethane foam material in practical application. The improvement of the comprehensive performance of the soft polyurethane foam by adopting the novel reinforcing and stabilizing preparation method is of great significance.
The compounding of inorganic nanometer particles and polyurethane through a blending method is one of the main ways of improving the mechanical and heat resistance of polyurethane foam. Xu et al Journal of Applied Polymer Science,2017,105,2988, a one-step method for preparing polyurethane/modified organic montmorillonite composite foam material by using organic modified montmorillonite, and stripping montmorillonite is realized by using the reaction of amino groups on the surface of montmorillonite and isocyanate groups, so that the high-temperature dynamic performance of polyurethane foam is improved. Liu et al Wuhan University Journal of Natural Sciences,2011,16,29, prepared a silica/polyurethane composite foam by a one-step process, the composite foam having a larger cell size, a significantly higher initial thermal degradation temperature (286 ℃) and char yield (15.5%) than the pure polyurethane foam. Chinese patent application No. CN202010091725.1 discloses a heat-resistant polyurethane flexible foam and a preparation method thereof, which utilizes the compounding of a plurality of polyether polyols and adds additives such as carbon nanotubes to realize the improvement of heat resistance of polyurethane foam, and is suitable for high temperature environments such as automobile engine cabin. However, the current research on polyurethane foam reinforcement and heat resistance by using reactive reinforcing fillers involves less, and how to achieve uniform dispersion of nanofillers in a matrix and exert intrinsic optimal performance advantages is still the focus of the research.
The Graphene Oxide (GO) has extremely high mechanical strength, and the surface oxygen-containing groups of the graphene oxide and polyurethane have excellent compatibility, and meanwhile, the graphene oxide has higher electron affinity, can capture free radicals generated by the degradation of polyurethane molecules, and has reinforcing and stabilizing effects on high polymer materials such as polyurethane; lignin (Lignin) is a natural polymer material which is inferior to cellulose in nature, the molecular structure of Lignin contains a polyphenol hydroxyl structure, and the phenolic ether structure in a molecular chain segment ensures that the Lignin has the functions of good heat resistance, strong absorption to ultraviolet rays and the like. Meanwhile, GO and Lignin have hydrogen bond function, can participate in the polymerization reaction of polyurethane, and introduce the GO and Lignin into polyurethane molecular chains to realize uniform dispersion of molecular level, thereby being beneficial to the performance of the GO and Lignin. Therefore, the Lignin/GO nano hybrid material is prepared and applied to polyurethane foam to endow high reinforcing and stabilizing effects.
Disclosure of Invention
The invention aims to provide a preparation method of high-strength heat-resistant flexible polyurethane foam, and the prepared polyurethane foam not only has excellent tensile strength and excellent elongation at break, but also has obviously improved thermal degradation temperature.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The invention provides a preparation method of high-strength heat-resistant flexible polyurethane foam, which is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyether polyol, 3.5 to 5 parts of foaming agent, 1 to 4 parts of foam stabilizer, 0.3 to 2 parts of catalyst, 5 to 20 parts of chain extender, 2 to 16 parts of graphene oxide, 1 to 8 parts of lignin, 0.3 to 2.4 parts of polyoxyethylene and 60 to 100 parts of isocyanate;
The preparation method of the high-strength heat-resistant soft polyurethane foam comprises the following steps:
(1) Preparing lignin/graphene oxide nano hybrid materials: ultrasonically dispersing 1-8 parts of lignin powder in 100-300 parts of deionized water to form uniform dispersion, adding 0.3-2.4 parts of polyoxyethylene and 2-16 parts of graphene oxide, continuously performing ultrasonic treatment at 75 ℃ for 60min, performing suction filtration after the reaction is finished, and performing vacuum drying at 45 ℃ to obtain a lignin/graphene oxide nano hybrid material;
(2) Preparation of high-strength heat-resistant flexible polyurethane foam: uniformly dispersing the prepared lignin/graphene oxide nano hybrid material in 80-100 parts of polyether polyol by ultrasonic, then adding 0.3-2 parts of catalyst, 5-20 parts of chain extender, 3.2-5 parts of foaming agent and 1-4 parts of foam stabilizer, and rapidly and uniformly stirring to obtain a component A; weighing 50-90 parts of isocyanate as a component B, quickly adding the component B into the component A, mechanically stirring uniformly, quickly pouring into a mould at 40-55 ℃ for foaming reaction, and standing for 18h at room temperature after the reaction is finished, thus obtaining the high-strength heat-resistant soft polyurethane foam material.
The invention is further provided with: the foaming agent is prepared from dichloromethane and water according to the proportion of 0.08-0.24: 1 by volume ratio.
The invention is further provided with: the foam stabilizer is an organosilicon surfactant, preferably any one of AK-158, L580, SH-421 and BA-7810.
The invention is further provided with: the catalyst is an amine catalyst and a metal catalyst, preferably any one or two of triethylene diamine, pentamethylene diethylenetriamine, stannous octoate, 1,5, 7-triazido bicyclo (4.4.0) dec-5-ene and dibutyl tin dilaurate.
The invention is further provided with: the chain extender is any one of ethylene glycol, glycerol, butanediol and trimethylolpropane.
The invention is further provided with: the isocyanate is any one of hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, toluene diisocyanate and isophorone diisocyanate.
The invention is further provided with: the polyoxyethylene is a polyoxyethylene compound with a molecular weight of 10 ten thousand.
Compared with the prior art, the invention has the beneficial effects that:
According to the invention, lignin/graphene oxide hybrid nano material is prepared by ultrasonic compounding by utilizing excellent ageing resistance of lignin containing polyphenol hydroxyl structure and high-strength high-barrier high-stability characteristics of layered graphene oxide, and synergistic enhancement and stabilization effects of lignin/graphene oxide hybrid nano material are exerted; by utilizing pi-pi conjugation and hydrogen bond action between lignin and graphene oxide, the lignin is intercalated between graphene oxide layers, so that the peeling of the graphene oxide is realized, the uniform dispersion of the lignin and the graphene oxide in a polyurethane matrix is synchronously realized, and the performance advantages of the lignin and the graphene oxide are better exerted; the lignin/graphene oxide nano hybrid material has heterogeneous nucleation in the polyurethane foaming process by utilizing the reaction activity of the hydroxyl groups rich in lignin/graphene oxide nano hybrid material, introducing the lignin/graphene oxide nano hybrid material into a polyurethane molecular main chain through the chemical reaction with isocyanate groups, and preparing polyurethane soft foam by a one-step foaming method, so that the foam strength is improved, meanwhile, the lignin/graphene oxide can capture free radicals generated in the thermo-oxidative aging process, the hybrid layered labyrinth structure can prevent thermo-oxidative permeation and diffusion, the polyurethane foam is endowed with high mechanical strength and thermal stability, the tensile strength can be improved by 36%, and the thermal degradation temperature is obviously improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a statistical plot of tensile strength of the present invention.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a preparation method of high-reinforcement heat-resistant soft polyurethane foam, which comprises the following specific processes:
2 parts of Lignin powder is ultrasonically dispersed in 200 parts of deionized water to form a uniform dispersion, 0.6 part of polyoxyethylene and 4 parts of Graphene Oxide (GO) are added, ultrasonic treatment is continued for 60min at 75 ℃, pi-pi stacking action and hydrogen bonding action of Lignin and graphene oxide are promoted, and after the reaction is finished, suction filtration and vacuum drying are carried out at 45 ℃ to obtain the Lignin/graphene oxide (Lignin/GO) nano hybrid material.
Uniformly dispersing the prepared Lignin/graphene oxide (Lignin/GO) nano hybrid material in 85 parts of polyether polyol by ultrasonic, adding 0.2 part of triethylene diamine and 0.3 part of stannous octoate as catalysts, 5 parts of ethylene glycol as a chain extender, 3 parts of water as a foaming agent, 0.5 part of dichloromethane and 1 part of AK158 as a foam stabilizer (purchased from Xuzhou bright Huiyang New materials Co., ltd.) according to mass fraction, and rapidly and uniformly stirring to obtain a component A; 70 parts of Toluene Diisocyanate (TDI) is weighed as a component B, the component B is rapidly added into the component A, and is mechanically stirred uniformly, and is rapidly poured into a mould at 40 ℃ for foaming reaction, and the mixture is stood for 18 hours at room temperature after the reaction is finished, so that the high-strength heat-resistant soft polyurethane foam material is obtained.
Example 2
The embodiment provides a preparation method of high-reinforcement heat-resistant soft polyurethane foam, which comprises the following specific processes:
3 parts of Lignin powder is ultrasonically dispersed in 250 parts of deionized water to form a uniform dispersion, 0.9 part of polyoxyethylene and 8 parts of Graphene Oxide (GO) are added, ultrasonic treatment is continued for 60min at 75 ℃, pi-pi stacking action and hydrogen bonding action of Lignin and graphene oxide are promoted, and after the reaction is finished, suction filtration and vacuum drying are carried out at 45 ℃ to obtain the Lignin/graphene oxide (Lignin/GO) nano hybrid material.
Uniformly dispersing the prepared Lignin/graphene oxide (Lignin/GO) nano hybrid material in 95 parts of polyether polyol by ultrasonic, adding 0.2 part of pentamethylene diethylenetriamine as a catalyst, 0.5 part of stannous octoate, 5 parts of trimethylolpropane as a chain extender, 3.6 parts of water as a foaming agent, 0.4 part of dichloromethane and 1.5 parts of L580 (purchased from Shandong Aoto Li Long chemical Co., ltd.) as a foam stabilizer according to mass fraction, and rapidly and uniformly stirring to obtain a component A; and (3) weighing 61 parts of diphenylmethane diisocyanate (MDI) as a component B, rapidly adding the component B into the component A, mechanically stirring uniformly, rapidly pouring into a mold at 45 ℃ for foaming reaction, and standing for 18 hours at room temperature after the reaction is finished to obtain the high-reinforcement heat-resistant soft polyurethane foam material.
Example 3
The embodiment provides a preparation method of high-reinforcement heat-resistant soft polyurethane foam, which comprises the following specific processes:
And (3) ultrasonically dispersing 5 parts of Lignin (Lignin) powder in 300 parts of deionized water to form a uniform dispersion, adding 1.5 parts of polyoxyethylene and 10 parts of Graphene Oxide (GO) into the uniform dispersion, continuously performing ultrasonic treatment at 75 ℃ for 60 minutes, promoting pi-pi stacking action and hydrogen bonding action of Lignin and graphene oxide, performing suction filtration after the reaction is finished, and performing vacuum drying at 45 ℃ to obtain the Lignin/graphene oxide (Lignin/GO) nano hybrid material.
Uniformly dispersing the prepared Lignin/graphene oxide (Lignin/GO) nano hybrid material in 100 parts of polyether polyol by ultrasonic, adding 0.3 part of triethylene diamine and 0.7 part of 1,5, 7-triazidine bicyclo (4.4.0) deca-5-ene serving as a catalyst, 10 parts of butanediol serving as a chain extender, 3.5 parts of water serving as a foaming agent, 0.5 part of dichloromethane and 3 parts of BA-7810 serving as a foam stabilizer (purchased from Shanghai Bai chemical engineering Co., ltd.) according to mass fraction, and rapidly and uniformly stirring to obtain a component A; weighing 75 parts of Hexamethylene Diisocyanate (HDI) as a component B, rapidly adding the component B into the component A, mechanically stirring uniformly, rapidly pouring into a mold at 45 ℃ for foaming reaction, and standing for 18 hours at room temperature after the reaction is finished to obtain the high-reinforcement heat-resistant soft polyurethane foam material.
Example 4
The embodiment provides a preparation method of high-reinforcement heat-resistant soft polyurethane foam, which comprises the following specific processes:
And (3) ultrasonically dispersing 8 parts of Lignin (Lignin) powder in 300 parts of deionized water to form a uniform dispersion, adding 2.4 parts of polyoxyethylene and 14 parts of Graphene Oxide (GO) into the uniform dispersion, continuously performing ultrasonic treatment at 75 ℃ for 60 minutes, promoting pi-pi stacking action and hydrogen bonding action of Lignin and graphene oxide, performing suction filtration after the reaction is finished, and performing vacuum drying at 45 ℃ to obtain the Lignin/graphene oxide (Lignin/GO) nano hybrid material.
Uniformly dispersing the prepared Lignin/graphene oxide (Lignin/GO) nano hybrid material in 100 parts of polyether polyol by ultrasonic, adding 0.2 part of triethylene diamine and 1 part of dibutyltin dilaurate as a catalyst, 15 parts of glycerol as a chain extender, 4 parts of water as a foaming agent, 0.5 part of dichloromethane and 2 parts of SH-421 as a foam stabilizer (purchased from Buddha Corning New Material Co., ltd.) according to mass fraction, and rapidly and uniformly stirring to obtain a component A; weighing 85 parts of isophorone diisocyanate (IPDI) as a component B, rapidly adding the component B into the component A, mechanically stirring uniformly, rapidly pouring into a 50 ℃ die for foaming reaction, and standing for 18 hours at room temperature after the reaction is finished to obtain the high-reinforcement heat-resistant soft polyurethane foam material.
Effect testing
Polyurethane foams prepared by examples 1 to 4 in the present invention were respectively referred to as experimental examples 1 to 4; the properties of the polyurethane foam samples of each equivalent group were then measured separately and the relevant data recorded in table 1.
Table 1: experimental data record table
As can be seen from table 1 and fig. 1, the polyurethane foams of examples 1 to 4 have not only excellent tensile strength but also excellent elongation at break; in addition, the thermal degradation temperature of the prepared polyurethane foam is also obviously improved.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. The preparation method of the high-strength heat-resistant flexible polyurethane foam is characterized in that the high-strength heat-resistant flexible polyurethane foam is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyether polyol, 3.2 to 5 parts of foaming agent, 1 to 4 parts of foam stabilizer, 0.3 to 2 parts of catalyst, 5 to 20 parts of chain extender, 2 to 16 parts of graphene oxide, 1 to 8 parts of lignin, 0.3 to 2.4 parts of polyoxyethylene and 60 to 100 parts of isocyanate;
The preparation method of the high-strength heat-resistant soft polyurethane foam comprises the following steps:
(1) Preparing lignin/graphene oxide nano hybrid materials: ultrasonically dispersing 1-8 parts of lignin powder in 100-300 parts of deionized water to form uniform dispersion, adding 0.3-2.4 parts of polyoxyethylene and 2-16 parts of graphene oxide, continuously performing ultrasonic treatment at 75 ℃ for 60min, performing suction filtration after the reaction is finished, and performing vacuum drying at 45 ℃ to obtain a lignin/graphene oxide nano hybrid material;
(2) Preparation of high-strength heat-resistant flexible polyurethane foam: uniformly dispersing the prepared lignin/graphene oxide nano hybrid material in 80-100 parts of polyether polyol by ultrasonic, then adding 0.3-2 parts of catalyst, 5-20 parts of chain extender, 3.2-5 parts of foaming agent and 1-4 parts of foam stabilizer, and rapidly and uniformly stirring to obtain a component A; weighing 50-90 parts of isocyanate as a component B, quickly adding the component B into the component A, mechanically stirring uniformly, quickly pouring into a mould at 40-55 ℃ for foaming reaction, and standing for 18h at room temperature after the reaction is finished, thus obtaining the high-strength heat-resistant soft polyurethane foam material.
2. The method for producing a highly reinforced heat-resistant flexible polyurethane foam as claimed in claim 1, wherein: the foaming agent is prepared from dichloromethane and water according to the proportion of 0.08-0.24: 1 by volume ratio.
3. The method for producing a highly reinforced heat-resistant flexible polyurethane foam as claimed in claim 1, wherein: the foam stabilizer is an organosilicon surfactant, preferably any one of AK-158, L580, SH-421 and BA-7810.
4. The method for producing a highly reinforced heat-resistant flexible polyurethane foam as claimed in claim 1, wherein: the catalyst is an amine catalyst and a metal catalyst, preferably any one or two of triethylene diamine, pentamethylene diethylenetriamine, stannous octoate, 1,5, 7-triazido bicyclo (4.4.0) dec-5-ene and dibutyl tin dilaurate.
5. The method for producing a highly reinforced heat-resistant flexible polyurethane foam as claimed in claim 1, wherein: the chain extender is any one of ethylene glycol, glycerol, butanediol and trimethylolpropane.
6. The method for producing a highly reinforced heat-resistant flexible polyurethane foam as claimed in claim 1, wherein: the isocyanate is any one of hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, diphenylmethane diisocyanate, toluene diisocyanate and isophorone diisocyanate.
7. The method for producing a highly reinforced heat-resistant flexible polyurethane foam as claimed in claim 1, wherein: the polyoxyethylene is a polyoxyethylene compound with a molecular weight of 10 ten thousand.
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