CN116769325A - Regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering and preparation method thereof - Google Patents
Regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering and preparation method thereof Download PDFInfo
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 58
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229920001587 Wood-plastic composite Polymers 0.000 title claims abstract description 49
- 239000011155 wood-plastic composite Substances 0.000 title claims abstract description 49
- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000012407 engineering method Methods 0.000 title description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 38
- -1 polyethylene Polymers 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 29
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 23
- 239000007822 coupling agent Substances 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 17
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 16
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 16
- AQRLNPVMDITEJU-UHFFFAOYSA-N triethylsilane Chemical compound CC[SiH](CC)CC AQRLNPVMDITEJU-UHFFFAOYSA-N 0.000 claims description 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 13
- 229920000573 polyethylene Polymers 0.000 claims description 13
- 239000004743 Polypropylene Substances 0.000 claims description 12
- 229920001155 polypropylene Polymers 0.000 claims description 12
- 239000002023 wood Substances 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound 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 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 10
- 239000002028 Biomass Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- LNENVNGQOUBOIX-UHFFFAOYSA-N azidosilane Chemical compound [SiH3]N=[N+]=[N-] LNENVNGQOUBOIX-UHFFFAOYSA-N 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 9
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000011259 mixed solution Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 4
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 4
- 241000209140 Triticum Species 0.000 claims description 4
- 235000021307 Triticum Nutrition 0.000 claims description 4
- NDVFUVDXDDUZCH-UHFFFAOYSA-N [SiH4].[N-]=[N+]=[N-] Chemical compound [SiH4].[N-]=[N+]=[N-] NDVFUVDXDDUZCH-UHFFFAOYSA-N 0.000 claims description 4
- 239000011425 bamboo Substances 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- 229920000742 Cotton Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 240000000249 Morus alba Species 0.000 claims description 2
- 235000008708 Morus alba Nutrition 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical group [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 229920001684 low density polyethylene Polymers 0.000 claims description 2
- 239000004702 low-density polyethylene Substances 0.000 claims description 2
- 150000001282 organosilanes Chemical class 0.000 claims description 2
- 229910000077 silane Inorganic materials 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 claims 3
- 244000082204 Phyllostachys viridis Species 0.000 claims 1
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 5
- 235000013312 flour Nutrition 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
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
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of wood-plastic composite materials and discloses a regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of wood-plastic composite materials, in particular to a regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering and a preparation method thereof.
Background
The wood-plastic composite is a composite made of wood fiber/wood powder and a thermoplastic such as polyethylene, polypropylene, polyvinyl chloride or polylactic acid. Widely applied to garden and interior decoration. Wood-plastic composites have many advantages, such as: the material is homogeneous, the size is more stable than wood, cracks are not easy to generate, and the material cannot absorb moisture and deform; the thermoplastic plastic has processability, can be formed by extrusion, compression molding, injection molding and other processes, and has small equipment abrasion; has the advantages of wood appearance, higher hardness than plastic products, and the like. However, because the main components of wood plastic are wood powder and high molecular polymer, the wood plastic is easy to burn at high temperature, can generate a large amount of volatile gas, is difficult to self-extinguish after ignition, and has great potential safety hazard. As reported in Wood flour coating and research on flame-retardant wood-plastic composite materials thereof, melamine coating modification is carried out on the wood flour, and the coated wood flour is added into polyethylene to prepare the halogen-free flame-retardant wood-plastic composite material, the melamine coating wood flour greatly improves the heat resistance and compatibility of the powder, creates favorable conditions for processing the wood-plastic composite material, and meanwhile, the flame retardance of the wood-plastic composite material is greatly improved by the composite flame-retardant system, but the mechanical property of the composite flame-retardant wood-plastic composite material is poor.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the regenerated energy-saving flame-retardant wood-plastic composite material for the building engineering and the preparation method thereof, and the flame-retardant and environment-friendly performances of the regenerated energy-saving flame-retardant wood-plastic composite material are improved.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the regenerated energy-saving flame-retardant wood-plastic composite material for the building engineering comprises the following components in parts by weight: 10-40 parts of polyethylene, 10-30 parts of polypropylene, 40-60 parts of biomass fiber, 15-20 parts of flame retardant, 20-30 parts of modified nano titanium dioxide and 5-10 parts of coupling agent.
Preferably, the preparation method of the regenerated energy-saving flame-retardant wood-plastic composite material comprises the following steps:
(1) Drying biomass fiber at 100-120 ℃ for 2-3 hours, and then stirring and mixing the biomass fiber with polyethylene, polypropylene, a flame retardant, modified silicon dioxide and a coupling agent for standby, wherein the mixing temperature is 50-70 ℃ and the mixing time is 12-15min;
(2) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 40-60r/min and the temperature of 150-170 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 2-4mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material;
preferably, the coupling agent is at least one of a low density polyethylene coupling agent or an organosilane coupling agent.
Preferably, the biomass fiber is at least one of bamboo pulp, waste wood, wheat straw, cotton and mulberry bark.
Preferably, the flame retardant is aluminum hydroxide or polysilaboxane.
Preferably, the preparation method of the modified nano titanium dioxide in the step (1) comprises the following steps: mixing ethanol, ammonia water and an azido silane coupling agent, magnetically stirring for 10-15min at 20-25 ℃, and then adding the mixed solution of montmorillonite and ethanol to obtain the modified nano titanium dioxide.
Preferably, the preparation method of the azidosilane coupling agent comprises the following steps: 2-3g of triethylsilane, 3-4g of sodium azide, 2-5g of tetrabutylammonium bromide and 4-6g of butanone are sequentially added into a reactor, nitrogen is introduced for protection, and after heating and refluxing for 5-7h, diatomite is filtered, washed, dried and evaporated to obtain the silane azide coupling agent.
Preferably, the mass ratio of the ethanol to the ammonia water to the traumatic-azide silane coupling agent is 1:2-4:3-5.
Preferably, the washing is performed with a dichloromethane solvent
(III) beneficial technical effects
According to the invention, the silane coupling agent is subjected to azidation, then mixed liquid of montmorillonite and ethanol is added to obtain modified montmorillonite nano titanium dioxide, biomass fibers are dried under the condition of stirring and mixing with polyethylene, polypropylene, a flame retardant, modified titanium dioxide and a coupling agent for standby, the mixture is placed in a double-screw extruder, extruded and granulated by the double-screw extruder, mixed and molded in a grinding tool, and cooled to obtain the regenerated energy-saving flame-retardant wood-plastic composite material, the modified montmorillonite nano titanium dioxide and the flame retardant have synergistic effect on flame retardance, and when the wood-plastic composite material burns, the montmorillonite nano titanium dioxide is gathered on the wood-plastic surface layer, and a compact protective layer is formed on the surface to prevent further burning.
Drawings
FIG. 1 is a reaction scheme of modified montmorillonite nano titanium dioxide.
Fig. 2 is an FTIR view of a regenerated energy-saving flame retardant wood plastic composite.
FIG. 3 is a slice view of a renewable energy-saving flame retardant wood-plastic composite.
Detailed Description
Example 1
(1) Sequentially adding 2g of triethylsilane, 3g of sodium azide, 2g of tetrabutylammonium bromide and 4g of butanone into a reactor, introducing nitrogen for protection, heating and refluxing for 5 hours, filtering diatomite, washing with dichloromethane, drying and evaporating to obtain an azidosilane coupling agent;
(2) Mixing ethanol, ammonia water and an azido silane coupling agent in a mass ratio of 1:2:3, magnetically stirring for 10min at 20 ℃, and then adding a mixed solution of montmorillonite and ethanol to obtain the modified montmorillonite nano titanium dioxide.
(3) Drying bamboo pulp at 100deg.C for 2 hr, and mixing with polyethylene, polypropylene, flame retardant, modified titanium dioxide and coupling agent under stirring at 50deg.C for 12min;
(4) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 40r/min and the temperature of 150 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 2mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
Example 2
(1) Sequentially adding 2.5g of triethylsilane, 3.5g of sodium azide, 3.5g of tetrabutylammonium bromide and 5g of butanone into a reactor, introducing nitrogen for protection, heating and refluxing for 6 hours, filtering diatomite, washing with dichloromethane, drying, and evaporating to obtain an azidosilane coupling agent;
(2) Mixing ethanol, ammonia water and an azido silane coupling agent in a mass ratio of 1:3:4, magnetically stirring for 22.5min at 22.5 ℃, and then adding a mixed solution of montmorillonite and ethanol to obtain the modified nano titanium dioxide.
(3) Drying cortex Mori at 110deg.C for 2.5 hr, and mixing with polyethylene, polypropylene, flame retardant, modified titanium dioxide, and coupling agent under stirring at 60deg.C for 13.5min;
(4) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 50r/min and the temperature of 160 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 3mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
Example 3
(1) Adding 3g of triethylsilane, 4g of sodium azide, 5g of tetrabutylammonium bromide and 6g of butanone into a reactor in sequence, introducing nitrogen for protection, heating and refluxing for 7 hours, filtering by diatomite, and washing by methylene dichloride to obtain a traumatic-nitrogen azide silane coupling agent;
(2) Mixing ethanol, ammonia water and an azido silane coupling agent in a mass ratio of 1:4:5, magnetically stirring for 15min at 25 ℃, and then adding a mixed solution of montmorillonite and ethanol to obtain the modified montmorillonite nano titanium dioxide.
(3) Drying wheat straw at 120deg.C for 3 hr, and mixing with polyethylene, polypropylene, flame retardant, modified titanium dioxide, and coupling agent under stirring at 70deg.C for 15min;
(4) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 60r/min and the temperature of 170 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 4mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
Example 4
(1) Sequentially adding 2g of triethylsilane, 3g of sodium azide, 2g of tetrabutylammonium bromide and 4g of butanone into a reactor, introducing nitrogen for protection, heating and refluxing for 5 hours, filtering diatomite, washing with dichloromethane, drying and evaporating to obtain an azidosilane coupling agent;
(2) Mixing ethanol, ammonia water and a traumatic-aza silane coupling agent in a mass ratio of 1:3:4, magnetically stirring for 22.5min at 22.5 ℃, and then adding a mixed solution of montmorillonite and ethanol to obtain the modified montmorillonite nano titanium dioxide.
(3) Drying cotton at 110deg.C for 2.5 hr, and mixing with polyethylene, polypropylene, flame retardant, modified titanium dioxide, and coupling agent under stirring at 60deg.C for 13.5min;
(4) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 60r/min and the temperature of 170 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 4mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
Example 5
(1) Sequentially adding 2.5g of triethylsilane, 3.5g of sodium azide, 3.5g of tetrabutylammonium bromide and 5g of butanone into a reactor, introducing nitrogen for protection, heating and refluxing for 6 hours, filtering diatomite, washing with dichloromethane, drying and evaporating to obtain a traumatic-nitrogen azide silane coupling agent;
(2) Mixing ethanol, ammonia water and a traumatic-aza silane coupling agent in a mass ratio of 1:4:5, magnetically stirring for 15min at 25 ℃, and then adding a mixed solution of montmorillonite and ethanol to obtain the modified montmorillonite nano titanium dioxide.
(3) Drying wheat straw at 120deg.C for 3 hr, and mixing with polyethylene, polypropylene, flame retardant, modified titanium dioxide, and coupling agent under stirring at 70deg.C for 15min;
(4) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 40r/min and the temperature of 150 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 2mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
Comparative example 1
(1) Adding 3g of triethylsilane, 4g of sodium azide, 5g of tetrabutylammonium bromide and 6g of butanone into a reactor in sequence, introducing nitrogen for protection, heating and refluxing for 7 hours, filtering diatomite, washing with dichloromethane, drying and evaporating to obtain a traumatic-nitrogen azide silane coupling agent;
(2) Mixing ethanol, ammonia water and a traumatic-aza silane coupling agent in a mass ratio of 1:4:5, magnetically stirring for 15min at 25 ℃, and then adding a mixed solution of montmorillonite and ethanol to obtain the modified nano titanium dioxide.
(3) Drying bamboo pulp at 110deg.C for 2.5h, and mixing with polyethylene, polypropylene, flame retardant, modified titanium dioxide and coupling agent under stirring at 60deg.C for 13.5min;
(4) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 40r/min and the temperature of 150 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 2mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
The tensile property of the regenerated energy-saving flame-retardant wood-plastic composite material is measured by an electronic universal tester according to GB/T1040.1-2018 standard, the tensile rate is 40mm/min, and the sample is 6cm long, 1.5cm wide and 2mm high. The bending strength is measured by an electronic universal tester according to GB/T9341-2008 standard, the test speed is 3mm/min, and the test sample is 5cm long, 3cm wide and 2mm high. The ignition time is referred to the GB/T10631-2013 standard.
The tensile strength of the regenerated energy-saving flame-retardant wood-plastic composite material reaches 22.6-37.4mpa, the ignition time reaches 39.9-56.9, and the bending strength reaches 22.4-39.4 by adopting the modified montmorillonite nano titanium dioxide.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a building engineering is with regeneration energy-conserving fire-retardant wood plastic composite which characterized in that: the composition comprises the following components in parts by weight: 10-40 parts of polyethylene, 10-30 parts of polypropylene, 40-60 parts of biomass fiber, 15-20 parts of flame retardant, 20-30 parts of modified nano titanium dioxide and 5-10 parts of coupling agent.
2. A preparation method of a regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering is characterized by comprising the following steps of: the preparation method of the regenerated energy-saving flame-retardant wood-plastic composite material comprises the following steps:
(1) Drying biomass fiber at 100-120 ℃ for 2-3 hours, and then stirring and mixing the biomass fiber with polyethylene, polypropylene, a flame retardant, modified nano titanium dioxide and a coupling agent for standby, wherein the mixing temperature is 50-70 ℃ and the mixing time is 12-15min;
(2) Placing the mixture into a double-screw extruder, melting the materials at the rotating speed of 40-60r/min and the temperature of 150-170 ℃, carrying out plasticizing granulation after stretching and cooling to obtain regenerated energy-saving flame-retardant wood-plastic composite particles with the diameter of 2-4mm, extruding and granulating by the double-screw extruder, mixing and molding in a grinding tool, and cooling to obtain the regenerated energy-saving flame-retardant wood-plastic composite material.
3. The regenerative energy-saving flame-retardant wood-plastic composite for constructional engineering according to claim 1, wherein the coupling agent is at least one of a low-density polyethylene coupling agent or an organosilane coupling agent.
4. The regenerative energy-saving flame-retardant wood-plastic composite material for constructional engineering according to claim 1, wherein the biomass fiber is at least one of bamboo pulp, waste wood, wheat straw, cotton and mulberry bark.
5. The regenerative energy-saving flame-retardant wood-plastic composite for constructional engineering according to claim 1, wherein the flame retardant is aluminum hydroxide and polysilaboxane.
6. The method for preparing the regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering according to claim 2, wherein the preparation method of the modified nano titanium dioxide in the step (1) is as follows: mixing ethanol, ammonia water and an azido silane coupling agent, magnetically stirring for 10-15min at 20-25 ℃, and then adding the mixed solution of montmorillonite and ethanol to obtain the modified nano titanium dioxide.
7. The preparation method of the regenerated energy-saving flame-retardant wood-plastic composite material for the constructional engineering, which is characterized in that the preparation method of the azide silane coupling agent comprises the following steps: 2-3g of triethylsilane, 3-4g of sodium azide, 2-5g of tetrabutylammonium bromide and 4-6g of butanone are sequentially added into a reactor, nitrogen is introduced for protection, and after heating and refluxing for 5-7h, diatomite is filtered, washed, dried and evaporated to obtain the silane azide coupling agent.
8. The preparation method of the regenerated energy-saving flame-retardant wood-plastic composite material for the constructional engineering, which is disclosed in claim 6, wherein the mass ratio of the ethanol to the ammonia water to the traumatic-azide silane coupling agent is 1:2-4:3-5.
9. The method for preparing a regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering according to claim 7, wherein the washing is performed by using a dichloromethane solvent.
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| CN202310878349.4A CN116769325A (en) | 2023-07-18 | 2023-07-18 | Regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering and preparation method thereof |
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| CN202310878349.4A CN116769325A (en) | 2023-07-18 | 2023-07-18 | Regenerated energy-saving flame-retardant wood-plastic composite material for constructional engineering and preparation method thereof |
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