CN109111754A - A kind of environment protection plant fibre foaming sound-absorbing material and preparation method thereof and drainage mold and molding machine - Google Patents

A kind of environment protection plant fibre foaming sound-absorbing material and preparation method thereof and drainage mold and molding machine Download PDF

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Publication number
CN109111754A
CN109111754A CN201810991627.6A CN201810991627A CN109111754A CN 109111754 A CN109111754 A CN 109111754A CN 201810991627 A CN201810991627 A CN 201810991627A CN 109111754 A CN109111754 A CN 109111754A
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drainage
molding machine
foaming
water
sound
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陈奇峰
杜新亚
陈广学
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D29/00Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
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    • B29C44/3442Mixing, kneading or conveying the foamable material
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    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0014Use of organic additives
    • C08J9/0023Use of organic additives containing oxygen
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066Use of inorganic compounding ingredients
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/02CO2-releasing, e.g. NaHCO3 and citric acid
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    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/18Binary blends of expanding agents
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    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2301/00Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/02Cellulose; Modified cellulose
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    • C08J2397/00Characterised by the use of lignin-containing materials
    • C08J2397/02Lignocellulosic material, e.g. wood, straw or bagasse
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    • C08J2401/00Characterised by the use of cellulose, modified cellulose or cellulose derivatives
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    • C08J2403/00Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
    • C08J2403/02Starch; Degradation products thereof, e.g. dextrin
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    • C08J2429/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
    • C08J2429/02Homopolymers or copolymers of unsaturated alcohols
    • C08J2429/04Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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    • C08J2497/00Characterised by the use of lignin-containing materials
    • C08J2497/02Lignocellulosic material, e.g. wood, straw or bagasse
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    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
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    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24Acids; Salts thereof
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    • C08K2003/265Calcium, strontium or barium carbonate
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    • C08K9/04Ingredients treated with organic substances

Abstract

The present invention relates to a kind of environment protection plant fibre foaming sound-absorbing materials and preparation method thereof and drainage mold and molding machine.Environment protection plant fibre foaming sound-absorbing material waste paper and bagasse are raw material, after fiber separation, brooming, oxygenation pretreatment, and it is put into drainage and molding machine by mechanical stirring, drainage foamed material after molding is put into micro-wave oven and carries out microwave foaming, and after drying, arranging modification, the foamed material with certain pore structure can be obtained.Material price of the present invention is cheap to be easy to get, and by selected specific formula, enhances internal pore structure, not only has sound absorbing performance, while also having shock resistance, insulation, fire retardant, anticorrosive, the good characteristics such as degradable green.In addition using the mold specially designed, existing free foaming is solved the problems, such as, so that the foaming body surface obtained is uniform, center is without recess, and shape is regular.

Description

A kind of environment protection plant fibre foaming sound-absorbing material and preparation method thereof and drainage mold And molding machine
Technical field
It foams sound-absorbing material the invention discloses a kind of environment protection plant fibre, in particular to one kind can be used for absorbing sound place The preparation method of the plant fiber foam material of reason, and process the plant fiber foamed sound-absorbing material used two set it is dedicated Mold, water treatment plant mold and molding machine mold.
Background technique
With the fast development of China's aviation, railway, highway and urban transportation, noise has become main environment Pollution problem.The basic method of control noise is to achieve the purpose that noise reduction by sound absorption.Most widely used at present is foam plastic Expect that sound-absorbing material is mainly polyurethane foam plastics, although having strong sound absorber of good performance, polyurethane foam is a kind of The thermosetting plastics that can not be dissolved can neither be melted, environmental pollution is extremely serious.Therefore plant fiber foamed sound-absorbing material As new research hotspot, sponge as earliest sound-absorbing material, such as cotton fibriia, cane fibre board, Just there is good sound absorbing performance within the scope of medium, high frequency.This is because fibrous inside, which has, is much distributed different hole knot Structure, aperture is smaller, and high frequency sound absorbing performance is higher.Plant fiber foamed sound-absorbing material is added using plant fiber as primary raw material The auxiliary agents such as foaming agent, plasticizer, nucleating agent, adhesive foam through microwave, obtain the light-weight foam material that density is small, porosity is high Material not only has good sound absorbing performance, while also having shock resistance, insulation, fire retardant, anticorrosive, and degradable green etc. is excellent Characteristic.
The foam process of plant fiber foam material has free from environmental pollution, production work compared with general foamed plastic The advantages such as skill is simple, low in cost, raw material sources are wide, shockproof shock insulation, have been widely used in building, packaging, auto industry etc. Field.Especially applied widely in packaging field, with the progress of plant fiber foamed technology, which can be used for substituting existing The eps foam liner used on a large scale and packing.
Microwave foaming has the characteristics that uniform, efficient, and microwave radiation is to fiber with certain modifying function, and microwave adds Hot rate is fast, penetration depth is strong, homogeneous heating, thermal gradient are minimum;Microwave foaming one-pass molding, equipment requirement is simple, convenient easy Operation.
Summary of the invention
The object of the present invention is to provide a kind of environment protection plant fibre foaming sound-absorbing materials and preparation method thereof.
In order to achieve the above objectives, it specifically adopts the following technical scheme that:
A kind of environment protection plant fibre foaming sound-absorbing material, the component comprising following parts by weight:
Bagasse oven dry stock: 16~32 parts
Waste paper oven dry stock: 16~32 parts
Polyvinyl alcohol: 2~8 parts
Foaming agent: 8~16 parts
Cornstarch: 4~8 parts
Precipitated calcium carbonate: 3~6 parts
Borax: 0.2~0.4 part
Glycerine: 2~4 parts
Modified montmorillonoid: 1~4 part.
Further, the oven dry stock be secondary stock after naoh treatment and bagasse pulp according to mass ratio 1~ 3:1 mixing gained;The foaming agent is to mix gained according to mass ratio 1:1 by ammonium hydrogen carbonate and sodium bicarbonate.
Further, the montmorillonite is with stearyl dimethyl benzyl ammonium chloride (ODBA) modified montmorillonoid K10 institute ?.
A kind of preparation method of environment protection plant fibre foaming sound-absorbing material, includes the following steps:
(1) it goes core paper, bagasse pulpboard to be torn into fritter difference water corrugated board and impregnates 3~5h, then dissociated in fluffer 5000~10000 turns, drainage is fitted into equilibrium water conten 16 in hermetic bag~for 24 hours;
(2) in mass ratio it is that 1-3:1 is mixed with bagasse pulp by gained secondary stock in step (1), takes oven dry stock quality 2% ~ 4% Sodium hydrate solid is mixed with mixed slurry, so that mixed stock quality score is 10%~15%, in 50~70 DEG C of water-baths 10~30min is handled in pot, every 5~10min is once rubbed;
(3) polyvinyl alcohol is stirred to 30~50min in 70~90 DEG C of oil bath pans to being completely dissolved;
(4) by cornstarch in 50~70 DEG C of stirred in water bath to gelatinization;
(5) sodium hydroxide in step (2) solution is washed away, then by the cornstarch of gelatinization and dissolves and be cooled to room temperature PVA solution is mixed with, and adds calcium carbonate, borax, modified montmorillonoid, glycerine, ammonium hydrogen carbonate and the compound hair of sodium bicarbonate 10~30 min are mixed in infusion;
(6) step (5) acquired solution is poured into drainage mold, opens Vacuum filtration device, filtered 3~10min, drainage is filled The pedestal equipped with material is set carefully to remove;
(7) material after step (6) drainage being placed on molding machine, placement is smooth, and it is then placed in microwave and heats, middle height Fire screen position, 10~20min;The power of the middle high fire screen position is 700W-760W;
(8) molding foamed material is taken out, 30~70 DEG C of baking ovens, dry 2~6h are put into;
(9) sound absorption testing experiment finally is carried out on standing wave tube sound absorption tester.
A kind of drainage mold and molding machine in environment protection plant fibre foaming sound-absorbing material, the water treatment plant Including material volumetric cylinder, material volumetric cylinder is connected by bottom cover and water strainer up and down, and drainage screen cloth is provided on the water strainer;It is described Suction filtration container is connected with below water strainer;Moisture in material enters pumping through water strainer by the drainage screen cloth on water strainer Container is filtered, is provided with suction filtration pore on the suction filtration container, the suction filtration pore is connect with vacuum evacuation device;The bottom cover, appearance Cylinder, filters the connection that connecting hole is designed on each part of container to be used to reinforce each section at water strainer;
The molding machine includes that material volumetric cylinder and bottom cover form pedestal, by center fixing bolt, screw rod, fixed plate, upper fixation End nut, lower fixed end nut, fixing threaded hole form fixed device;The center fixing bolt passes through fixed plate and is connected to pressure Column;The both ends of the fixed plate are connected with screw rod;The screw rod passes through the fixing threaded hole being opened on volumetric cylinder, and passes through upper fixation End nut and lower fixed end nut carry out fixation pressure column.
Further, in water treatment plant, the pedestal of the material volumetric cylinder and the bottom cover as the molding machine, with institute The fixation device and pressure column for stating molding machine can exactly match.
Further, the bottom cover, material volumetric cylinder, water strainer, suction filtration container, pressure column are by polytetrafluoroethylene (PTFE) institute Rounding cylindrical part.
Further, the drainage screen cloth is 40 ~ 80 mesh filter clothes or strainer.
It further, is all the connection type for using seam allowance between a component of the water treatment plant.
Further, in molding machine, the screw rod is slided up and down, detachably;The pressure column is solid cylinder.
Compared with prior art, present invention has an advantage that
Plant fiber foamed sound-absorbing material of the invention has good sound absorbing performance, when with a thickness of 2CM, highest average sound absorption Coefficient is up to 0.55;And compared with traditional sound-absorbing material, it is also equipped with lightweight, density is (0.015-0.020) g/cm, anti-impact It hits, insulation, fire retardant, anticorrosive, the excellent performances such as degradable green.The exploitation of mold reduces free water content, to reduce The energy consumption in drying and moulding stage avoids bursting because the porous structure that water boiling is formed is excessive, influences nucleation process;It improves The problem of free foaming rough surface and central concave, so that the material shape after foaming is regular.
Apparatus of the present invention structure is simple, easy to operate, low production cost, and water treatment plant, will by connection vacuum plant Free water, which pulls out, in foamed material comes, thus generated energy consumption when reducing dry, while also effectively preventing because of water boiling The porous structure of formation is excessive and bursts, and influences nucleation process, destroys the original structure of foamed material.Material after drainage is not Secondary transferring is needed, directly becomes the pedestal of molding machine, pressure in connection together with bottom cover with the material volumetric cylinder of water treatment plant Column can foam with fixed device.The drainage and molding machine of plant fiber microwave foaming, unique concord design, make Structure is simpler, the seam allowance connection between each component, so that convenient disassembly, strong flexibility, and preparation process is environment friendly and pollution-free, Cost price is low.
Detailed description of the invention
Fig. 1 is the water treatment plant to foam for plant fiber microwave.
Wherein, 1, bottom cover;2, material volumetric cylinder;3, drainage screen cloth;4, water strainer;5, container is filtered;6, pore is filtered;7, even Connect hole.
Fig. 2 is the molding machine to foam for plant fiber microwave.
Wherein, 1, bottom cover;2, material volumetric cylinder;8, center fixing bolt;9, screw rod;10, fixed plate;11, pressure column;12, Upper fixing end nut;13, lower fixed end nut;14, fixing threaded hole.
Specific embodiment
In following embodiment it is used imvite modified the preparation method is as follows:
(1) it takes 10g montmorillonite to be added in 300ML water, in 50 DEG C of stirring in water bath 3h, 6.6g octadecyl dimethyl benzyl chlorine is added Change ammonium (ODBA), continues constant temperature and stir 3h, natural cooling.
(2) step (1) mixed solution after cooling is centrifuged, is then washed with 50% ethanol solution, Until supernatant pH value is 7.
(3) it dries, grinds, with 200 mesh sieves to get modified montmorillonoid in 80 DEG C of vacuum drying ovens.
Used drainage mold and molding machine in following embodiment, structure are following (as illustrated in figs. 1 and 2).It is described Water treatment plant includes material volumetric cylinder 2, and about 2 material volumetric cylinder is connected by bottom cover 1 and water strainer 4, is provided on the water strainer 4 Drainage screen cloth 3;It is connected with below the water strainer 4 and filters container 5;It is provided on the suction filtration container 5 and filters pore 6, it is described Pore 6 is filtered to connect with vacuum evacuation device;The bottom cover 1, volumetric cylinder 2, water strainer 4, filter each part of container 5 on be designed with connection Hole 7 is with the connection for reinforcing each section;The molding machine includes that material volumetric cylinder 2 and bottom cover 1 form pedestal, is fixed by center Bolt 8, screw rod 9, fixed plate 10, upper fixing end nut 12, lower fixed end nut 13, fixing threaded hole 14 form fixed device;Institute It states center fixing bolt 8 and is connected to pressure column 11 across fixed plate 10;The both ends of the fixed plate 10 are connected with screw rod 9;It is described Screw rod 9 passes through the fixing threaded hole 14 being opened on volumetric cylinder 2, and is fixed by upper fixing end nut 12 with lower fixed end nut 13 Pressure column 11.In water treatment plant, the material volumetric cylinder 2 becomes the pedestal of the molding machine with the bottom cover 1, with the molding The fixation device and pressure column 11 of device can exactly match.The bottom cover 1, material volumetric cylinder 2, water strainer 4, filter container 5, Pressure column 11 is by the made cylindrical parts of polytetrafluoroethylene (PTFE).The drainage screen cloth 3 is 40 ~ 80 mesh filter clothes or strainer.It is described It is all the connection type using seam allowance between a component of water treatment plant.In molding machine, the screw rod 9 is slided up and down;It is described Pressure column 11 is solid cylinder.
Invention device implementation process is described further with reference to the accompanying drawing:
Step 1: connecting each component according to described in attached drawing 1 in sequence, connects Vacuum filtration device, opens vacuum and takes out Device trial operation is filtered to ensure that leakproofness is good.
Step 2: bottom cover is unloaded, and foamed material is poured into material volumetric cylinder, and bottom cover is sealed to tight, opening vacuum Suction filtration device starts drainage.
Step 3: after the completion of drainage, water treatment plant being filtered and is opened between pore 6 and water strainer 4, careful to be inverted, and will be filtered The network of rivers and screen cloth are removed, and molding machine is connected.
Step 4: center fixing bolt 8, fixed plate 10, pressure column 11 are fixedly connected, and pressure column is put into material and is held In cylinder 2, screw rod 9 passes through the fixing threaded hole 14 on material volumetric cylinder 2, upper fixing end nut 12 and lower fixed end nut 13 is tightened solid Positioning is set, according to the height of material come appropriate adjustment nut location.
Step 5: the molding machine in step 4 being put into micro-wave oven and is foamed, after foaming successfully, by upper fixing end nut 12 and lower fixed end nut 13 unscrew, slowly pressure column 11 is lifted, can be obtained the good plant fiber foam material of molding.
Embodiment 1
(1) it takes 16g that the corrugated board of core paper, bagasse pulpboard is gone to be torn into fritter and distinguish respectively and impregnates 5h in water, then in fluffer 5000 turns of dissociation, drainage are fitted into hermetic bag equilibrium water conten for 24 hours.
(2) gained secondary stock in step (1) and bagasse pulp 1:1 ratio in mass ratio are mixed, takes the sodium hydroxide of 0.64g Solid is mixed with mixed slurry, so that mixed stock quality score is 10%, handles 30min in 70 DEG C of water-baths, often 10min is once rubbed.
(3) it takes 2.4g polyvinyl alcohol in 50ML deionized water, stirs 40min in 90 DEG C of oil bath pans.
(4) take 8g cornstarch in 70 DEG C of stirred in water bath to gelatinization.
(5) sodium hydroxide in step (2) solution is washed away, then by the cornstarch of gelatinization and dissolve and be cooled to room The PVA solution of temperature is mixed with, and adds 3g calcium carbonate, 0.4g borax, 2g modified montmorillonoid, 3.8g glycerine, 4g bicarbonate 10min is stirred under ammonium and 4g sodium bicarbonate composite foamable agent mixing room temperature.
(6) step (5) acquired solution is poured into drainage mold, opens Vacuum filtration device, filtered 5min, drainage is filled The pedestal equipped with material is set carefully to remove.
(7) material after step (6) drainage is placed on molding machine, placement is smooth, is then placed in microwave and heats (M1-L213B for selecting beauty), middle high fire screen position, 15min.
(8) molding foamed material is taken out, dry 2h is put into 50 DEG C of baking ovens.
(9) sound absorption testing experiment finally is carried out on standing wave tube sound absorption tester, can directly measures average sound absorption coefficient 0.44。
Embodiment 2
(1) it takes 16g that the corrugated board of core paper, bagasse pulpboard is gone to be torn into fritter and distinguish respectively and impregnates 5h in water, then in fluffer 5000 turns of dissociation, drainage are fitted into hermetic bag equilibrium water conten for 24 hours.
(2) gained secondary stock in step (1) and bagasse pulp 1:1 ratio in mass ratio are mixed, takes the sodium hydroxide of 0.64g Solid is mixed with mixed slurry, so that mixed stock quality score is 10%, handles 30min in 70 DEG C of water-baths, often 10min is once rubbed.
(3) it takes 4g polyvinyl alcohol in 50ML deionized water, stirs 40min in 90 DEG C of oil bath pans.
(4) take 8g cornstarch in 70 DEG C of stirred in water bath to gelatinization.
(5) sodium hydroxide in step 2 solution is washed away, then by the cornstarch of gelatinization and dissolve and be cooled to room The PVA solution of temperature is mixed with, and adds 3g calcium carbonate, 0.4g borax, 3g modified montmorillonoid, 3.8g glycerine, 4g bicarbonate 10min is stirred under ammonium and 4g sodium bicarbonate composite foamable agent mixing room temperature.
(6) step (5) acquired solution is poured into drainage mold, opens Vacuum filtration device, filtered 5min, drainage is filled The pedestal equipped with material is set carefully to remove.
(7) material after step (6) drainage being placed on molding machine, placement is smooth, and it is then placed in microwave and heats, Middle high fire screen position, 15min.
(8) molding foamed material is taken out, dry 2h is put into 50 DEG C of baking ovens.
(9) sound absorption testing experiment finally is carried out on standing wave tube sound absorption tester, can directly measures average sound absorption coefficient 0.55。
Embodiment 3
(1) it takes 16g that the corrugated board of core paper, bagasse pulpboard is gone to be torn into fritter and distinguish respectively and impregnates 5h in water, then in fluffer 5000 turns of dissociation, drainage are fitted into hermetic bag equilibrium water conten for 24 hours.
(2) gained secondary stock in step (1) and bagasse pulp 1:1 ratio in mass ratio are mixed, takes the sodium hydroxide of 0.64g Solid is mixed with mixed slurry, so that mixed stock quality score is 10%, handles 30min in 70 DEG C of water-baths, often 10min is once rubbed.
(3) it takes 4g polyvinyl alcohol in 50ML deionized water, stirs 40min in 90 DEG C of oil bath pans.
(4) take 8g cornstarch in 70 DEG C of stirred in water bath to gelatinization.
(5) sodium hydroxide in step 2 solution is washed away, then by the cornstarch of gelatinization and dissolve and be cooled to room The PVA solution of temperature is mixed with, and adds 3g calcium carbonate, 0.4g borax, 3.8g glycerine, 4g ammonium hydrogen carbonate and 4g sodium bicarbonate 10min is stirred under composite foamable agent mixing room temperature.
(6) step (5) acquired solution is poured into drainage mold, opens Vacuum filtration device, filtered 5min, drainage is filled The pedestal equipped with material is set carefully to remove.
(7) material after step (6) drainage being placed on molding machine, placement is smooth, and it is then placed in microwave and heats, Middle high fire screen position, 15min.
(8) molding foamed material is taken out, dry 2h is put into 50 DEG C of baking ovens.
(9) sound absorption testing experiment finally is carried out on standing wave tube sound absorption tester, can directly measures average sound absorption coefficient 0.50。

Claims (10)

  1. A kind of sound-absorbing material 1. environment protection plant fibre foams, which is characterized in that the component comprising following parts by weight:
    Bagasse oven dry stock: 16~32 parts
    Waste paper oven dry stock: 16~32 parts
    Polyvinyl alcohol: 2~8 parts
    Foaming agent: 8~16 parts
    Cornstarch: 4~8 parts
    Precipitated calcium carbonate: 3~6 parts
    Borax: 0.2~0.4 part
    Glycerine: 2~4 parts
    Modified montmorillonoid: 1~4 part.
  2. 2. according to claim 1 environment protection plant fibre foam sound-absorbing material, it is characterised in that: the oven dry stock be through Secondary stock after naoh treatment mixes gained according to 1~3:1 of mass ratio with bagasse pulp;The foaming agent is by ammonium hydrogen carbonate Gained is mixed according to mass ratio 1:1 with sodium bicarbonate.
  3. 3. environment protection plant fibre foaming sound-absorbing material according to claim 1, it is characterised in that: the montmorillonite is with ten Obtained by eight zephirans (ODBA) modified montmorillonoid K10.
  4. 4. the preparation method of environment protection plant fibre foaming sound-absorbing material according to claim 1, it is characterised in that:
    (1) it goes core paper, bagasse pulpboard to be torn into fritter difference water corrugated board and impregnates 3~5h, then dissociated in fluffer 5000~10000 turns, drainage is fitted into equilibrium water conten 16 in hermetic bag~for 24 hours;
    (2) in mass ratio it is that 1-3:1 is mixed with bagasse pulp by gained secondary stock in step (1), takes oven dry stock quality 2% ~ 4% Sodium hydrate solid is mixed with mixed slurry, so that mixed stock quality score is 10%~15%, in 50~70 DEG C of water-baths 10~30min is handled in pot, every 5~10min is once rubbed;
    (3) polyvinyl alcohol is stirred to 30~50min in 70~90 DEG C of oil bath pans to being completely dissolved;
    (4) by cornstarch in 50~70 DEG C of stirred in water bath to gelatinization;
    (5) sodium hydroxide in step (2) solution is washed away, then by the cornstarch of gelatinization and dissolves and be cooled to room temperature PVA solution is mixed with, and adds calcium carbonate, borax, modified montmorillonoid, glycerine, ammonium hydrogen carbonate and the compound hair of sodium bicarbonate 10~30 min are mixed in infusion;
    (6) step (5) acquired solution is poured into drainage mold, opens Vacuum filtration device, filtered 3~10min, drainage is filled The pedestal equipped with material is set carefully to remove;
    (7) material after step (6) drainage being placed on molding machine, placement is smooth, and it is then placed in microwave and heats, middle height Fire screen position, 10~20min;The power of the middle high fire screen position is 700W-760W;
    (8) molding foamed material is taken out, 30~70 DEG C of baking ovens, dry 2~6h are put into;
    (9) sound absorption testing experiment finally is carried out on standing wave tube sound absorption tester.
  5. 5. a kind of drainage mold and molding dress in a kind of foaming sound-absorbing material of environment protection plant fibre described in claim 4 It sets, which is characterized in that the water treatment plant includes material volumetric cylinder (2), and material volumetric cylinder (2) is up and down by bottom cover (1) and water strainer (4) It is connected, is provided with drainage screen cloth (3) on the water strainer (4);It is connected with below the water strainer (4) and filters container (5);Institute It states to filter to be provided on container (5) and filters pore (6), the suction filtration pore (6) connect with vacuum evacuation device;The bottom cover (1), Volumetric cylinder (2), filters the connection that connecting hole (7) is designed on container (5) each part to be used to reinforce each section at water strainer (4);
    The molding machine includes that material volumetric cylinder (2) and bottom cover (1) form pedestal, by center fixing bolt (8), screw rod (9), is consolidated Fixed board (10), upper fixing end nut (12), lower fixed end nut (13), fixing threaded hole (14) form fixed device;The center Fixing bolt (8) passes through fixed plate (10) and is connected to pressure column (11);The both ends of the fixed plate (10) are connected with screw rod (9); The screw rod (9) passes through the fixing threaded hole (14) being opened on volumetric cylinder (2), and passes through upper fixing end nut (12) and lower fixing end Nut (13) comes fixation pressure column (11).
  6. 6. a kind of drainage and molding machine for the foaming of plant fiber microwave according to claim 4, which is characterized in that filter In water installations, the pedestal of the material volumetric cylinder (2) and the bottom cover (1) as the molding machine, with the molding machine Fixed device and pressure column (11) can exactly match.
  7. 7. the drainage and molding machine for the foaming of plant fiber microwave according to claim 4, which is characterized in that the bottom Lid (1), material volumetric cylinder (2), water strainer (4), suction filtration container (5), pressure column (11) are by the made cylinder of polytetrafluoroethylene (PTFE) Component.
  8. 8. a kind of drainage and molding machine for the foaming of plant fiber microwave according to claim 4, which is characterized in that institute Stating drainage screen cloth (3) is 40 ~ 80 mesh filter clothes or strainer.
  9. 9. a kind of drainage and molding machine for the foaming of plant fiber microwave according to claim 4, which is characterized in that institute Stating all is the connection type for using seam allowance between a component of water treatment plant.
  10. 10. a kind of drainage to foam for plant fiber microwave and molding according to claim 1 according to claim 4 Device, which is characterized in that in molding machine, the screw rod (9) is slided up and down;The pressure column (11) is solid cylinder.
CN201810991627.6A 2018-08-29 2018-08-29 A kind of environment protection plant fibre foaming sound-absorbing material and preparation method thereof and drainage mold and molding machine Pending CN109111754A (en)

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