CN114182573A - Antibacterial flame-retardant decorative fiber board - Google Patents
Antibacterial flame-retardant decorative fiber board Download PDFInfo
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- CN114182573A CN114182573A CN202111561375.1A CN202111561375A CN114182573A CN 114182573 A CN114182573 A CN 114182573A CN 202111561375 A CN202111561375 A CN 202111561375A CN 114182573 A CN114182573 A CN 114182573A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
- D21H11/04—Kraft or sulfate pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/10—Organic non-cellulose fibres
- D21H13/12—Organic non-cellulose fibres from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H13/14—Polyalkenes, e.g. polystyrene polyethylene
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/46—Non-siliceous fibres, e.g. from metal oxides
- D21H13/50—Carbon fibres
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/31—Gums
- D21H17/32—Guar or other polygalactomannan gum
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/34—Ignifugeants
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
- D21H21/52—Additives of definite length or shape
- D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
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Abstract
The invention belongs to the technical field of polyethylene fibers, and particularly relates to an antibacterial flame-retardant decorative fiber board; the fiber board is composed of 5-15% of bleached sulfate softwood pulp, 40-70% of polyethylene short fibers, 5-30% of short-cut polypropylene fibers, 5-25% of short-cut carbon fibers and 0.5-10% of composite microcapsules, the tensile strength of the fiber board can reach 172.2-178.5 MPa, the elongation at break is 1.89-2.06%, and the modulus is 16.9-18.2 GPa, meanwhile, the added composite microcapsules have the functions of antibiosis and flame retardance, the instant release amount of the flame retardant is large, the long-acting broad-spectrum antibacterial effect can be achieved, and the fiber board can be widely applied to the fields of automobiles, furniture and the like.
Description
Technical Field
The invention belongs to the technical field of decorative fiber boards, and particularly relates to an antibacterial flame-retardant decorative fiber board.
Technical Field
Polyethylene (PE) is a semi-crystalline thermoplastic polymer material that is chemically stable, of low mass, corrosion resistant, flexible, easy to machine and form, and has excellent mechanical properties. Polyethylene is a thermoplastic resin which is abundant in raw materials and widely used, is commonly used for manufacturing packaging materials, anticorrosive materials, films, communication cables, pressure-bearing parts and the like, is one of indispensable materials in various fields such as production, life and the like, and the consumption of the thermoplastic resin accounts for 1/4 of the total amount of plastics at present. However, the mechanical strength of the polyethylene material is generally low, and the mechanical properties can be improved to a certain extent under the mutual winding of longer fibers, but a large number of pore structures exist at the same time, so that the air content is high, the flame retardant effect is reduced, and the application universality of the polyethylene material is limited to a certain extent, so that the polyethylene material which can achieve better mechanical properties by adopting a simple production process has important significance. At present, researches show that polyethylene with high molecular weight or ultrahigh molecular weight is mostly adopted to improve the performance of polyethylene fibers, but the blending materials in the production process are difficult to achieve better uniformity, so that the equipment cost, the addition of materials such as dispersibility and the like in the large-scale production process are greatly increased. On the other hand, in many fields, the polyethylene fiber material needs to increase the flame retardant property, so as to avoid flammability generated by high temperature or slow down the fire spreading trend, in order to achieve good flame retardant effect, usually, when the polyethylene fiber is prepared, a flame retardant is mixed into a fiber raw material or a flame retardant coating is coated on the surface of a formed fiber, both of which can affect the performance of the fiber, and the flame retardant added by adopting the method is easy to cause the falling of the flame retardant in the specific use process of aging or washing the fiber material, and even cause environmental pollution; chinese patent CN106243471 discloses a flame-retardant wood fiber reinforced polyethylene flexible coiled material and a manufacturing method thereof, wherein melamine resin is adopted to coat wood fiber and functional additives such as a flame retardant, a compatilizer and a lubricant to form an intumescent flame-retardant system, wherein the wood fiber is used as a carbon source of the flame-retardant system, the wood fiber is hardly contacted with polyethylene fiber after being coated by the melamine resin, and the wood fiber reinforced polyethylene material to be solved is not difficult to embody in the technical scheme; chinese patent CN 112376123A discloses a microencapsulated ammonium polyphosphate flame-retardant ultra-high molecular weight polyethylene fiber and a preparation method thereof, wherein the matrix fiber in the invention is the ultra-high molecular weight polyethylene fiber, the flame-retardant effect is improved by adding the microencapsulated ammonium polyphosphate, the microcapsule is coated by melamine-formaldehyde resin, the oxygen index can reach more than 27 percent, but the melamine-formaldehyde resin used in the invention coats a flame retardant, and the resin can generate toxic gas at high temperature even reaching a flammable point, thereby threatening the health of human bodies and causing environmental burden. In conclusion, the development of the polyethylene fiber material which has excellent mechanical properties, integrates multiple effects of antibiosis and flame retardation, is green and environment-friendly has important significance for industrial production and maintenance of good human living environment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an antibacterial flame-retardant decorative fiber board.
The antibacterial flame-retardant decorative fiber board consists of 5-15% of bleached sulfate softwood pulp with the water content of 95%, 40-70% of short-cut polyethylene fiber, 5-30% of short-cut polypropylene fiber, 5-25% of short-cut carbon fiber and 0.5-10% of composite microcapsule by mass percent;
the length of the chopped polyethylene fiber is 6 mm;
the length of the chopped polypropylene fiber is 5 mm;
the length of the chopped carbon fiber is 6 mm;
the composite microcapsule is a modified guar gum coated flame-retardant core;
the modified guar gum is quaternary ammonium salt modified guar gum;
the quaternary ammonium salt is selected from polyquaternium-1, polyquaternium-10, polyquaternium-16 or polyquaternium-22.
Preferably, the fiber board consists of 5-10% of bleached sulfate softwood pulp, 48-60% of short-cut polyethylene fiber, 5-25% of short-cut polypropylene fiber, 5-18% of short-cut carbon fiber and 1-6% of composite microcapsule;
the flame-retardant core is selected from one or a combination of aluminum hydroxide, magnesium hydroxide, zinc borate, pyrophosphate, ammonium polyphosphate, poly-p-phenylsulfone phenylphosphonate, cyclic phosphonate, polyalcohol phosphate and triphenyl phosphonate;
the preparation method of the composite microcapsule comprises the following steps: stirring modified guar gum in an aqueous solution, uniformly dispersing, heating to 80-90 ℃, preserving heat, cooling to 50-60 ℃, slowly adding the flame-retardant core aqueous solution into the modified guar gum solution, stirring, uniformly dispersing, cooling, filtering and drying to obtain a composite microcapsule;
further, the solid content of the flame retardant core aqueous solution is 1-10%;
the preparation method of the modified guar gum comprises the following steps: mixing quaternary ammonium salt and guar gum in an aqueous solution, adding an initiator, crosslinking under ultraviolet irradiation, dialyzing, and drying to obtain modified guar gum;
further, the initiator is selected from one of BP, AIBN, CTX and DMB;
further, the mixing mass ratio of the quaternary ammonium salt to the guar gum is 1: 1-6;
the preparation method of the antibacterial flame-retardant decorative fiber board comprises the following steps:
the bleached sulfate softwood pulp is pulped and ground in a water pulper, then is uniformly mixed with short polyethylene fibers, short polypropylene fibers, short carbon fibers and composite microcapsules under a stirrer, is molded by being meshed with a net, is pressed for 20s at 16-20 MPa and 50 ℃, is hot-pressed for 60s at 20-25 MPa and 150 ℃ to obtain a fiber board, and finally is subjected to edge cutting, press polishing and stacking.
The antibacterial flame-retardant decorative fiber board adopts the chopped polyethylene fibers, the chopped polypropylene fibers and the chopped carbon fibers, compared with filament fibers, the short fibers are less wound, gaps among the fibers are small, meanwhile, the blending uniformity of the short fibers is obviously improved, the obtained mixed material is good in uniformity, and the mechanical properties such as the hardness, the rigidity, the bending resistance, the impact strength and the like of the formed fibers can be improved; in addition, the polyethylene short fibers and the polypropylene short fibers can form a eutectic structure, so that the molding performance of the fibers is improved, and the mechanical properties of the fibers are further enhanced by the chopped carbon fibers.
Because the three types of matrix fibers are short fibers which are non-plant fibers with excellent drainability and weak bonding force among the fibers, the forming evenness is not enough due to the fact that the water is filtered too fast and no water level exists in the forming process, and the fibers can not be rolled on a forming cylinder, the bleached sulfate softwood pulp is added into the formula, the slippage among the fibers can be reduced, the water level is increased, the mixing uniformity of the fibers is improved, the bonding capability among the fibers can be further improved, and the mechanical property of the composite material is improved.
The decorative fiber board is added with the composite microcapsule integrating multiple effects of antibiosis and flame retardance, the composite microcapsule is a structure that a flame retardant core is coated by guar gum modified by quaternary ammonium salt, the guar gum modified by quaternary ammonium salt can have more hydroxyl functional groups and can be combined with the flame retardant core containing metal ions or combined with the flame retardant core through hydrogen bonds, so that the flame retardant core is wrapped in the flame retardant core to form the microcapsule, the outer layer of the microcapsule is quaternary ammonium cations capable of containing quaternary ammonium cations or long-chain alkane, the structure can be combined with a cell membrane with negative charges after being contacted with bacteria, the permeability of the cell membrane is changed, substances such as enzyme and the like in cytoplasm are exuded, protein denaturation achieves a sterilization effect, and a long hydrophobic chain can be connected into the cell membrane to break the cell membrane, so that the sterilization effect is achieved; therefore, on one hand, the composite microcapsule achieves an antibacterial effect through the quaternary ammonium cation with positive charges on the outer layer, on the other hand, substances with a flame retardant function are wrapped in the composite microcapsule through hydrogen bonds or ion adsorption, so that the function of integrating multiple effects of antibiosis and flame retardance is achieved, furthermore, the flame retardant core which can be wrapped by the microcapsule is high in content, the loss and the falling of a flame retardant in the preparation and use processes of the composite material can be reduced, the use of an antibacterial agent can also be reduced, and the production cost is reduced.
Compared with the prior art, the invention has the following beneficial effects:
(1) the antibacterial flame-retardant decorative fiber board and the application thereof adopt the bleached sulfate softwood pulp, reduce the slippage among fibers, and increase the water level, thereby improving the mixing uniformity of the fibers, solving the defects of too fast water filtration, no water level, insufficient forming uniformity and even incapability of forming caused by weak bonding force among the fibers, further improving the bonding capacity among the fibers and improving the mechanical property of a composite material.
(2) The antibacterial flame-retardant decorative fiber board and the application thereof provided by the invention adopt the chopped polyethylene fiber with the fiber length of 6mm, the chopped polypropylene fiber with the fiber length of 5mm and the chopped carbon fiber with the fiber length of 6mm to be mixed, the obtained mixed material is good in uniformity, less in winding and small in gaps among the fibers, meanwhile, the chopped polyethylene fiber and the chopped polypropylene fiber form an eutectic structure, and the prepared composite material is high in hardness and rigidity, good in bending resistance and high in notch impact strength.
(3) The composite microcapsule with integrated antibacterial and flame retardant effects is adopted, so that the antibacterial and flame retardant effects can be achieved, the flame retardant is prevented from falling off in the preparation and use processes of the composite material, the instant flame retardant release is large, the flame retardant effect is good, the long-acting antibacterial effect is achieved, the use of the antibacterial agent is reduced, the production cost is reduced, meanwhile, the composite microcapsule is decomposed, toxic gas is not generated, the sustainable development plan is met, and the composite microcapsule can be widely applied to the fields of automobiles, furniture and the like.
Detailed Description
Experimental procedures according to the invention, in which no particular conditions are specified in the following examples, are generally carried out under conventional conditions, or under conditions recommended by the manufacturer. The various chemicals used in the examples are commercially available.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, article, or device that comprises a list of steps is not limited to only those steps or modules listed, but may alternatively include other steps not listed or inherent to such process, method, article, or device.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
All other embodiments obtained by a person skilled in the art without making any inventive step based on the embodiments of the present invention are within the scope of the present invention, and the following embodiments further describe the present invention, but the present invention is not limited to the embodiments.
Example 1 preparation of modified guar gum
Dispersing 8kg of quaternary ammonium salt-16 and 24kg of guar gum in 220L of distilled water, stirring uniformly, adding 0.32kg of BP photoinitiator, irradiating for 30min under ultraviolet light, dialyzing in distilled water by using a Dialysis tube MD44 Dialysis bag, and freeze-drying to obtain modified guar gum;
the modified guar gum for subsequently preparing the microcapsule is obtained by enrichment by the preparation method.
Example 2 preparation of composite microcapsules
Dispersing the modified guar gum in the water solution to obtain a mixed water solution with the solid content of 4%, uniformly stirring, heating to 85 ℃, preserving heat for 40min, cooling to 55 ℃, slowly adding a flame retardant core (zinc borate, cyclic phosphonate ester and triphenyl phosphonate are mixed according to the weight ratio of 1:1: 1) water solution with the solid content of 3% into the modified guar gum solution, fully stirring, uniformly dispersing, cooling to room temperature, filtering, and freeze-drying to obtain a composite microcapsule;
the composite microcapsules used in the subsequent examples of the present invention were obtained by enrichment using the composite microcapsule preparation method of this example.
Example 3 antibacterial flame-retardant decorative fiber sheet
The mixed material comprises the following components: 5% of bleached sulfate softwood pulp with the water content of 95%, 60% of short-cut polyethylene fibers, 15% of short-cut polypropylene fibers, 15% of short-cut carbon fibers and 5% of composite microcapsules;
the total feeding amount of the composite material is 220 kg;
the length of the short-cut polyethylene fiber is 6 mm;
the length of the chopped polypropylene fiber is 5 mm;
the length of the chopped carbon fiber is 6 mm;
the preparation method comprises the following specific steps:
the bleached sulfate softwood pulp is pulped and ground in a water pulper, then is uniformly mixed with short polyethylene fibers, short polypropylene fibers, short carbon fibers and composite microcapsules under a stirrer, is molded by being meshed with a net, is pressed for 20s at 20MPa and 50 ℃, is hot-pressed for 60s at 25MPa and 150 ℃ to obtain a fiber board, and finally is subjected to edge cutting, calendaring and stacking.
Example 4 antibacterial flame-retardant decorative fiber sheet
The mixed material comprises the following components: 10% of bleached sulfate softwood pulp, 50% of chopped polyethylene fiber, 20% of chopped polypropylene fiber, 15% of chopped carbon fiber and 5% of composite microcapsule;
the total feeding amount of the composite material is 220 kg;
the length of the short-cut polyethylene fiber is 6 mm;
the length of the chopped polypropylene fiber is 5 mm;
the length of the chopped carbon fiber is 6 mm;
the preparation method comprises the following specific steps:
the bleached sulfate softwood pulp is pulped and ground in a water pulper, then is uniformly mixed with short polyethylene fibers, short polypropylene fibers, short carbon fibers and composite microcapsules under a stirrer, is molded by being meshed with a net, is pressed for 20s at 20MPa and 50 ℃, is hot-pressed for 60s at 25MPa and 150 ℃ to obtain a fiber board, and finally is subjected to edge cutting, calendaring and stacking.
EXAMPLE 5 antibacterial flame-retardant decorative fiber sheet
The mixed material comprises the following components: 5% of bleached sulfate softwood pulp, 55% of chopped polyethylene fiber, 25% of chopped polypropylene fiber, 10% of chopped carbon fiber and 5% of composite microcapsule;
the total feeding amount of the composite material is 220 kg;
the length of the short-cut polyethylene fiber is 6 mm;
the length of the chopped polypropylene fiber is 5 mm;
the length of the chopped carbon fiber is 6 mm;
the preparation method comprises the following specific steps:
the bleached sulfate softwood pulp is pulped and ground in a water pulper, then is uniformly mixed with short polyethylene fibers, short polypropylene fibers, short carbon fibers and composite microcapsules under a stirrer, is molded by being meshed with a net, is pressed for 20s at 20MPa and 50 ℃, is hot-pressed for 60s at 25MPa and 150 ℃ to obtain a fiber board, and finally is subjected to edge cutting, calendaring and stacking.
Comparative example 1
The difference from example 4 is that bleached kraft softwood pulp was not added, the fill was made up to 100% with chopped polyethylene fibers, and the other steps were identical to example 4.
Comparative example 2
The difference from example 4 is that the chopped polypropylene fibers were not added and were filled to 100% with chopped polyethylene fibers, and the other steps were identical to example 4.
Comparative example 3
The difference from example 4 is that chopped carbon fibers are not added, the chopped polyethylene fibers are used for filling to 100%, and other steps are consistent with example 4.
Comparative example 4
The difference from example 4 is that no composite microcapsule is added, the mixture is filled up to 100% with a compatibilizer, and the other steps are the same as example 4.
Comparative example 5
The difference from example 4 is that no composite microcapsule is added, the quaternary ammonium salt-16 is used to make up to 100%, and other steps are the same as example 4.
Comparative example 6
The difference from the embodiment 4 is that the composite microcapsule is not added, the flame retardant mixture of zinc borate, cyclic phosphonate ester and triphenyl phosphonate in the weight ratio of 1:1:1 is used for supplementing to 100 percent, and other steps are consistent with the embodiment 4.
Test example 1 mechanical Properties test
Mechanical property tests are carried out on the antibacterial flame-retardant decorative fiber board samples (the thickness is 1.2mm) of the examples 3-5 and the comparative examples 1-3, GB/T1447-2005 is adopted in the test method, the initial load is 50N, the modulus rate is set to be 2mm/min, the strength rate is 5mm/min, 5 sample strips are tested on each group of samples, and then the average test result is taken and is shown in the table 1;
table 1: mechanical property of antibacterial flame-retardant decorative fiber board
The mechanical properties of the antibacterial flame-retardant decorative fiber board disclosed by the invention are shown in the results in table 1, and the tensile strength of the fiber board obtained in the examples 3-5 can reach 172.2-178.5 MPa, the elongation at break is 1.89-2.06%, and the modulus is 16.9-18.2 GPa, so that the fiber board has better strength and rigidity; the results of comparative examples 1-3 show that the mechanical strength and rigidity of the composite material without adding bleached sulfate softwood pulp are obviously reduced, and the toughness is increased, and the main reason is probably that the forming evenness is not enough due to weak bonding force between fibers, large fiber slippage, too fast water filtration and no water level; the mechanical strength and rigidity of the fiber board without adding the chopped polypropylene fibers and the chopped carbon fibers are obviously reduced, mainly because eutectic among the fibers is reduced.
Test example 2 bending resistance test
The samples (thickness 1.2mm) of the antibacterial flame-retardant decorative fiber board of the examples 3-5 and the comparative examples 1-3 were subjected to bending resistance test by a GB/T1449-2005 method, the initial load was 5N, the modulus rate was set to 2mm/min, the strength rate was 2mm/min, the test span was 16 times the thickness of the test sample, the loading indenter was cylindrical, the radius of the indenter was 5mm, 5 sample bars were tested for each group of samples, and the average test results were shown in Table 2;
table 2: bending resistance of antibacterial flame-retardant decorative fiber board
The results in Table 2 show that the antibacterial flame-retardant decorative fiber board has bending strength of 166.0-170.4 MPa and bending modulus of 12.6-13.5 GPa, and has excellent bending resistance; the data of comparative examples 1-3 show that the addition of bleached kraft softwood pulp, chopped polypropylene fiber and chopped carbon fiber has an effect on the bending resistance of the fiber board.
Test example 3 notched impact Strength test
Notch impact strength test is carried out on the antibacterial flame-retardant decorative fiber board samples (the thickness is 1.2mm) of the examples 3-5 and the comparative examples 1-3 by adopting a cantilever beam impact test method, 5 sample strips are tested on each group of samples, and then the average test result is shown in table 3;
table 3: notch impact strength of antibacterial flame-retardant decorative fiber board
The results in table 3 show that the antibacterial flame-retardant decorative fiber board has the notch impact strength of 1.932-2.025 kJ/m and excellent notch impact strength; the results of comparative examples 1-3 show that the lack of bleached sulfate softwood pulp, chopped polypropylene fiber and chopped carbon fiber in the fiber board can significantly reduce the notch impact strength of the fiber board.
Test example 4 antibacterial property test
Carrying out antibacterial performance test on the antibacterial flame-retardant decorative fiber board samples of the examples 3-5 and the comparative examples 4 and 5, wherein the antibacterial performance test method adopts an oscillation method of GB/T20944.3-2008, test strains select escherichia coli, staphylococcus aureus and candida albicans, 5 samples are tested in parallel in each example and comparative example, and an average value is taken;
taking a sample with the surface area of 50mm multiplied by 50mm, boiling the sample in water at 100 ℃, repeatedly testing the antibacterial property after the sample is exposed to the sun for 1000h, and calculating the antibacterial property retention rate;
evaluation of antibacterial Effect: the antibacterial rate of escherichia coli and staphylococcus aureus is more than or equal to 70%, and the antibacterial rate of candida albicans is more than or equal to 60%, so that the antibacterial effect is achieved;
according to the determination method, the antibacterial performance result of the obtained antibacterial flame-retardant decorative fiber board is as follows: in examples 3-5, the inhibition rate and retention rate of escherichia coli, staphylococcus aureus and candida albicans are greater than 90%, wherein the inhibition rate of bacteria is higher than that of fungi, and the antibacterial flame-retardant decorative fiber board prepared by the invention has a broad-spectrum antibacterial effect which meets the antibacterial performance evaluation standard, and the antibacterial retention rate of the composite material after aging treatment is basically equal to that before aging, and still has an excellent antibacterial effect; the antibacterial rate of the material is obviously reduced and does not meet the standard without adding the composite microcapsule (comparative example 4), the antibacterial rate and the retention rate obtained by replacing the composite microcapsule (comparative example 5) with the quaternary ammonium salt-16 are reduced by about 11.2-28.6%, the loss is large mainly probably in the preparation process and the use process, and the possible reason is that the quaternary ammonium salt-16 is unstable at high temperature and the guar gum has good heat resistance, so that the synergistic protection effect can be generated on the continuous antibacterial effect of the quaternary ammonium salt-16.
Test example 5 flame retardancy test
The antibacterial flame-retardant decorative fiber board samples of examples 3-5 and comparative examples 4 and 6 are subjected to flame retardant performance test, the test method of the oxygen index is GB/T5454-1997, 5 samples are tested in parallel in each example and comparative example, the average value is taken, and the result is shown in Table 5;
table 5: flame retardant property of antibacterial flame retardant decorative fiber board
| Group of | Oxygen index (LOI%) |
| Example 3 | 36.3 |
| Example 4 | 36.8 |
| Example 5 | 36.5 |
| Comparative example 4 | 5.2 |
| Comparative example 6 | 19.6 |
As can be seen from Table 5, the oxygen index of the antibacterial flame-retardant decorative fiber board prepared by the invention is 36.3-36.8%, and the antibacterial flame-retardant decorative fiber board has excellent flame retardant property; as can be seen from comparative examples 4 and 6, the flame retardant is not added into the composite material in the form of composite microcapsules, which can cause the flame retardance of the fiber board to be remarkably reduced, and the main possible reason is that the loss of the flame retardant is serious.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The antibacterial flame-retardant decorative fiber board is characterized by comprising, by mass, 5-15% of bleached sulfate softwood pulp with the water content of 95%, 40-70% of short-cut polyethylene fibers, 5-30% of short-cut polypropylene fibers, 5-25% of short-cut carbon fibers and 0.5-10% of composite microcapsules;
the length of the chopped polyethylene fiber is 6 mm;
the length of the chopped polypropylene fiber is 5 mm;
the length of the chopped carbon fiber is 6 mm;
the composite microcapsule is a modified guar gum coated flame-retardant core;
the modified guar gum is quaternary ammonium salt modified guar gum;
the quaternary ammonium salt is selected from polyquaternium-1, polyquaternium-10, quaternary ammonium salt-16 or quaternary ammonium salt-22.
2. The antibacterial flame-retardant decorative fiber board according to claim 1, wherein the fiber board is composed of 5-10% of bleached sulfate softwood pulp, 48-60% of chopped polyethylene fiber, 5-25% of chopped polypropylene fiber, 5-20% of chopped carbon fiber and 1-6% of composite microcapsule.
3. The antibacterial flame-retardant decorative fiber board as claimed in claim 1, wherein the flame-retardant core is selected from one or a combination of aluminum hydroxide, magnesium hydroxide, zinc borate, pyrophosphate, ammonium polyphosphate, poly-p-phenylene sulfone phenyl phosphonate, cyclic phosphonate, polyol phosphate and triphenyl phosphonate.
4. The antibacterial flame-retardant decorative fiber board as claimed in claim 1, wherein the preparation method of the composite microcapsule comprises: stirring the modified guar gum in the aqueous solution, uniformly dispersing, heating to 80-90 ℃, preserving heat, cooling to 50-60 ℃, slowly adding the flame-retardant core aqueous solution into the modified guar gum solution, stirring, uniformly dispersing, cooling, filtering and drying to obtain the composite microcapsule.
5. The antibacterial flame-retardant decorative fiberboard material of claim 1, wherein the preparation method of the modified guar gum comprises the following steps: mixing quaternary ammonium salt and guar gum in water solution, adding an initiator, crosslinking under ultraviolet irradiation, dialyzing, and drying to obtain the modified guar gum.
6. The antibacterial flame-retardant decorative fiber sheet according to claim 5, wherein the initiator is selected from one of BP, AIBN, CTX and DMB.
7. The antibacterial flame-retardant decorative fiber board as claimed in claim 1, wherein the solid content of the flame-retardant core aqueous solution is 1-10%.
8. The antibacterial flame-retardant decorative fiber board as claimed in claim 1, wherein the mixing mass ratio of the quaternary ammonium salt to the guar gum is 1: 1-6.
9. The antibacterial flame-retardant decorative fiber board as claimed in claims 1-8, wherein the preparation of the fiber board comprises the following steps:
the bleached sulfate softwood pulp is pulped and ground in a water pulper, then is uniformly mixed with short polyethylene fibers, short polypropylene fibers, short carbon fibers and composite microcapsules under a stirrer, is molded by being meshed with a net, is pressed for 20s at 16-20 MPa and 50 ℃, is hot-pressed for 60s at 20-25 MPa and 150 ℃ to obtain a fiber board, and finally is subjected to edge cutting, press polishing and stacking.
10. The application of the antibacterial flame-retardant decorative fiber board prepared by the method according to claim 9 in the fields of automobiles and furniture.
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