CN104740932A - Filter material sinter-formed by polyphenyl ether and activated carbon and preparation method of filter material - Google Patents
Filter material sinter-formed by polyphenyl ether and activated carbon and preparation method of filter material Download PDFInfo
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- CN104740932A CN104740932A CN201510186232.5A CN201510186232A CN104740932A CN 104740932 A CN104740932 A CN 104740932A CN 201510186232 A CN201510186232 A CN 201510186232A CN 104740932 A CN104740932 A CN 104740932A
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Abstract
The invention relates to a filter material sinter-formed by polyphenyl ether and activated carbon and a preparation method of the filter material. The filter material is prepared by sintering polyphenyl ether resin and optional activated carbon. The invention further relates to application of the filter material. The filter material has the remarkable advantages of heat resistance, wear resistance, corrosion resistance, difficulty in combustion, no toxicity, high rigidity and the like; the temperature of the filter material reaches up to 127 DEG C after the filter material is used for a long time and reaches up to 150 DEG C after the filter material is transiently used.
Description
Technical field
The invention belongs to gas dirt separating and filtering Material Field, be specifically related to filtering material of a kind of polyphenylene oxide and active carbon sinter molding and preparation method thereof.
Background technology
Thermal power plant, the ironmaking of iron and steel enterprise, steel-making, coking, the hot rolling of Metallurgical Enterprise, finish rolling, cold rolling, breaking down, the sealing wire of Steel Pipe Enterprise, cement industry, lime industry, tobacco business, glass industry, mine and military industry etc. discharge a large amount of dust in process of production.Such as, cold rolling acid regeneration workshop dust temperature arrives 127 DEG C, and containing a large amount of hydrochloric acid aerosols in dusty gas.Current major part adopts Bag filter.But the network structure of fibrous braid is easy to blocking, after blocking, the very poor needs of strainability are often changed and could be kept equipment efficiency of dust collection, and life cycle is short.
CN103146137A discloses a kind of preparation method of phenolic resin from adsorbing free formaldehyde and free-phenol, propane diols polyoxyethylene poly-oxygen propylene aether is added under being included in 80 DEG C of-200 DEG C of conditions, aniline ether, polyphenylene oxide, it is for subsequent use that the mixture of ethylene glycol and propane diols and polyvinylpyrrolidone reaction are prepared into mixture in 1-3 hour, phenol and base catalyst NaOH is added in reactor, cool the temperature to 40 DEG C-50 DEG C again, add cerium dioxide powder, absorbent charcoal powder body, diatom mineral powder and there is aluminium hydroxide powder and the pentaerythrite powder of fire-retardant fireproof effect, the viscosity recorded at 20 DEG C-25 DEG C is that 5000-10000Pa is finished product.According to this application, its resin has high tenacity, free formaldehyde and the feature that free-phenol is high from adsorption rate, burst size is few.
But this area still needs a kind of filtering material that can be used for above-mentioned commercial Application.
Summary of the invention
The invention provides a kind of filtering material.Filtering material of the present invention contains polyphenylene oxide resin and optional active carbon, or is made up of polyphenylene oxide resin and optional active carbon.Should understand, forming of filtering material is not defined as only containing polyphenylene oxide resin and optional active carbon by " being made up of polyphenylene oxide resin and optional active carbon " of the present invention, " sintered by polyphenylene oxide resin and optional active carbon and make " or similar description, its resinous principle meaning to use in filtering material is polyphenylene oxide resin (comprising the polyphenylene oxide resin of modification), other non-resin composition can be added, such as compatilizer etc.
In the particular embodiment, filtering material of the present invention is using polyphenylene oxide as matrix material, add a certain proportion of active carbon fine grained and be equipped with specific compatilizer, adding in mould as raw material after high-speed stirred mixes, in heating cabinet, sintering the goods of definite shape into.These goods have entirely through microcellular structure, pass through as holding gas during gas filtering material and block passing through of dust, thus play the effect of filtering dusty gas.
Therefore, in one embodiment, filtering material of the present invention contains polyphenylene oxide, polystyrene, hydrogenated styrene-butadiene-styrene (SEBS) and optional active carbon, or is made up of these materials.
In one embodiment, 260 DEG C, 5.0kgf is less than 5g/10min according to the melt index of the polyphenylene oxide that ASTM D 1238 records, and is preferably less than 3g/10min.
In one embodiment, the consumption proportion of polyphenylene oxide, polystyrene and hydrogenated styrene-butadiene-styrene is: 100 weight portions: 5-30 weight portion: 1-10 weight portion.
In one embodiment, the consumption proportion of polyphenylene oxide, polystyrene and hydrogenated styrene-butadiene-styrene is: 100 weight portions: 10-20 weight portion: 3-6 weight portion.
In one embodiment, the consumption proportion of polyphenylene oxide, polystyrene, hydrogenated styrene-butadiene-styrene and active carbon is: 100 weight portions: 5-30 weight portion: 1-10 weight portion: 3-20 weight portion.
In one embodiment, the consumption proportion of polyphenylene oxide, polystyrene, hydrogenated styrene-butadiene-styrene and active carbon is: 100 weight portions: 10-20 weight portion: 3-6 weight portion: 5-15 weight portion.
In one embodiment, the granular size of polyphenylene oxide is more than 20 orders.
In one embodiment, in polyphenylene oxide particles, the granular size (d) of 20%-50% is 20-60 order (20 orders≤d < 60 order), 30%-80% is 60-100 order (60 order < d≤100 order), and 0%-30% is more than 100 orders (d>100 orders).The percentage sum of the particle of each scope equals 100%.
In one embodiment, polyphenylene oxide particles contains the particle of the 20-60 order (20 orders≤d < 60 order) of 30%-40%, the particle of more than particle of 60-100 order (60 order < d≤100 order) of 40%-70% and 100 orders of 0%-20% (d > 100 order), wherein, the percentage sum of the particle in each magnitude range equals 100%.
In one embodiment, activated carbon granule is 10-200 order, preferred 60-100 order.
In one embodiment, the serviceability temperature of described filtering material is more than 120 DEG C.
In one embodiment, filtering material inside has the network-like through hole of 2-10 μm of size, and wherein, described network-like through hole is isotropic three-D space structure.
In one embodiment, the thickness of filtering material is generally 4mm.
Second aspect present invention provides a kind of preparation method of filtering material, the method comprises: the mixture of the polyphenylene oxide particles stirred, polystyrene, hydrogenated styrene-butadiene-styrene and optional active carbon is placed in mould, sinter under not higher than the crystallization temperature of polyphenylene oxide, after cooling, obtain described filtering material.
In one embodiment, carry out at being stirred in 100-130 DEG C, preferred 110-120 DEG C.
In one embodiment, lasting 1-4 hour, usual 2-3 hour is stirred.
In one embodiment, stir with 800-1300rpm/min.
In one embodiment, sinter and carry out in inert gas.
In one embodiment, inert gas is nitrogen.
In one embodiment, sinter and carry out at 220-290 DEG C.
In one embodiment, sintering time is 2-8 hour, is generally 3-6 hour.
In one embodiment, in polyphenylene oxide particles, the granular size (d) of 20%-50% is 20-60 order (20 orders≤d < 60 order), 30%-80% is 60-100 order (60 order < d≤100 order), and 0%-30% is more than 100 orders (d>100 orders).The percentage sum of the particle of each scope equals 100%.
In one embodiment, polyphenylene oxide particles contains the particle of the 20-60 order (20 orders≤d < 60 order) of 30%-40%, the particle of more than particle of 60-100 order (60 order < d≤100 order) of 40%-70% and 100 orders of 0%-20% (d > 100 order), wherein, the percentage sum of the particle in each magnitude range equals 100%.
In one embodiment, activated carbon granule is 10-200 order, preferred 60-100 order.
Third aspect present invention relates to the filtering material adopting the inventive method to prepare.
Fourth aspect present invention relates to filtering material of the present invention at steel industry, cement industry, lime industry, tobacco business, glass industry, the purposes in mine and military industry in Chalk-dust filtering.
Fifth aspect present invention also comprises polyphenylene oxide resin and is preparing the application in filtering material as main filtration composition.
Filtering material of the present invention has heat-resisting, wear-resisting, corrosion-resistant, difficult combustion, nontoxic, and rigidity is large waits remarkable advantage.The similar filtering material used in the market uses ultra-high molecular weight polyethylene as matrix material usually, thus serviceability temperature can only reach about 80 DEG C, and filtering material Long-Time Service temperature of the present invention is 127 DEG C, of short duration serviceability temperature more can up to 150 DEG C.Thus expand the scope of application and application scenario.
Accompanying drawing explanation
Fig. 1 shows three balls and becomes pore model.
The measurement mechanism of Fig. 2 show sample filter efficiency performance test.1, blower fan; 2, high efficiency particle air filter; 3, straight length; 4, aerosol entrance; 5, stable section; 6, static pressure rings before filtering; 7, sampling section pipe before filtering; 8, tested filter; 9, static pressure rings after filtering; 10, reducer pipe; 11, straight length; 12, flowmeter; 13, filter post-sampling pipe; 14, valve; 15, diluter; 16, particle sampling systems; 17, differential manometer; 18, thermometer; 19, hygrometer.
Detailed description of the invention
Polyphenylene oxide chemical name is poly-2,6-dimethyl-Isosorbide-5-Nitrae-phenylate, is called for short PPO or PPE, has following structural formula:
Polyphenylene oxide is the very high and more unmanageable engineering plastics of a kind of melt index.This is difficult to form the liquid phase needed for the melt-processed technique of common thermoplastic polymers's use after higher than its crystalline melt temperature owing to polyphenylene oxide.Polyphenylene oxide can change viscoelastic state into after higher than its crystalline melt temperature, and original polyphenylene ether particles can soften gradually and expand causes the particle of its melt surface can mutually extruding and the adhesion that formed between particle and particle.This temperature long period need be kept and give the goods that appropriate pressure can obtain shaping.The present invention also make use of the characteristic of this sinter molding of polyphenylene oxide just, makes the product with micro porous filtration function.Sintering characteristic described here may be summarized to be: polymer powder before sintering, after giving formative memory with mould, suitable time and not higher than the state of its crystallization temperature under make it be down to room temperature again after bonding fully, finally obtain the moulded products with certain mechanical performance.This becomes pore model very similar with three balls about metal sintering poromerics in metal powder metallurgy.
Fig. 1 shows three balls of the present invention and becomes pore model.In figure, three large balls represent polyphenylene oxide particles or activated carbon granule.In the ideal situation, intergranular contact is point cantact, and three large balls are tangent to each other, and the prototype in the middle bead all tangent with three large balls hole exactly, the diameter of bead just represents pore size.Connect A, B, C 3 point, just obtain the equilateral triangle △ ABC that a center of gravity is O point.So we easily obtain the computing formula of pore radius ideally, wherein: r
ofor the radius (μm) in hole; R is powder granule radius (μm).But, in actual process, the melting of polyphenylene ether powder particle surface, the contact caused between polyphenylene oxide particles is become face by original point cantact and contacts by this, polyphenylene oxide particles that is that the gap formed between particle can be softened or melting filled, the hole formed will be subject to certain compression, and activated carbon surface can't melting thus serve part and suppress the reducing of hole.Whole sintering system, by the control of polyphenylene ether toner particle diameter, can form the network-like through hole of 2-10um in the inside of filtering material.Its network-like through hole is isotropic three-D space structure, and the mode by Physical entrapment blocks passing through thus reaching filter effect of bulky grain solid.Not only possess physics to make material and block the function of filtering and also having chemisorbed, in sintering system, introducing active carbon as filling also is the important step promoting material body strainability.
Active carbon is a kind of nonpolar adsorbent, has hydrophobicity and the organic character of parent.It can adsorb multiple organic gas, and such as: benzene class, phenolic, alcohols, hydro carbons, namely has excellent adsorption capacity to some polar substances and some larger molecular organicses.And to sulfur dioxide, nitrogen oxide, the removal of the pernicious gases such as chloride also has purposes widely.The adsorption capacity of active carbon derives from itself great surface area and porosity.The hole of active carbon inside is between the basic crystallite of amorphous carbon, remove various carbon compound and unordered charcoal (sometimes also remove portion charcoal from the graphite linings of basic crystallite) hole produced afterwards in preparation process.The shape in its hole is varied, the entrance having some holes to have to reduce, and some is the capillary that both ends open or one end are closed, and also some is the slit V-shape hole, bellmouth etc. more or less in regular shape between two planes.The pore effective radius of active carbon is generally 1-10000nm, and aperture radius is at below 2nm, and transitional pore radius is generally 2-100nm.In most cases, the pore structure of active carbon mainly arranges in the following manner: macropore directly leads to the outer surface of active carbon, and transitional pore is the branch of macropore, and micropore is again the branch of transitional pore.The suction-operated of micropore is based on the transitional function of the channeling of macropore and mesopore.The essential element of active carbon is carbon, the oxygen introduced in the process of activation, and the elements such as hydrogen make its surface removing acidic functionality, neutral functionalities and the outer most Dou Shi oxygen functional group of functional group of basic functionality.This exactly has good adhesion with the oxygen key of polyphenylene oxide.In the three-dimensional structure of the network-like through hole of script, add the activated carbon granule that hole is rich in inside, microstructure is presented as some polyphenylene oxide particles are wrapped in an activated carbon granule.Such structure makes the percent of pass of gas greatly promote, and blocks outside filter efficiency at lifting physics, makes filtering material have more chemical adsorptivity.Physical adsorption way is not optionally, and is chemisorbed in adsorption process and there is electro transfer and share, and along with the generation of new chemical bond and the fracture of old chemical bond.When containing enough steam and oxygen in gas, the activation energy of active carbon increases, and can not only accomplish physical absorption and can accomplish chemisorbed to nitrogen oxide, heavy metal, bioxin etc.Thus relative to some other gas filtering material, filtering material of the present invention has obvious advantage in the integrated treatment of gas.
The introducing of active carbon can not only increase the adsorptivity of filtering material, also greatly can increase the network-like through hole of material internal and suppress a polyphenylene ether powder melting to cause reducing of internal void, improve the filter efficiency of material.But also need to add suitable compatilizer in order to strengthen the bulk strength of whole sintering system in the introducing process of active carbon.
The molecular weight of polyphenylene oxide resin is large, and molecular structure symmetry is high, causes to carry out to it adhesion that modification could improve itself and active carbon filler.Method of modifying comprises physics (blended, fill, strengthen and fretting map etc.) modification and chemistry (copolymerization, block, grafting and networking etc.) modification two kinds.
The physical modification of polyphenylene oxide comprises: (1) utilizes the polyblend of the compatibility of PPO and PS in broad compositing range and various band styrene units to prepare PPO/PS type alloy; (2) by with other engineering plastics, high performance PPO alloy such as preparation as blended in PA, PET, PBT, PPS etc.In addition, by the compatibility between component, polyphenylene oxide alloy can be divided into: (1) compatible system, is mainly PPO/PS; (2) non-conforming system, comprises PPO/PA, PPO/PBT, PPO/PET, PPO/PTPE, PPO/ polyolefin (PO) etc.; (3) partially compatible system, comprises PPO/PC, PPO/PPS, PPO/SBS, PPO/ABS, PPO/PMMA, PPO/SAN etc.
Chemical modification mainly comprises, and (1) carries out modification to the structure of PPO, as improved dissolubility and the gas permeability of PPO by bromination, Phosphation, sulfonylation, carboxylated etc.; (2) main chain of PPO or the Small molecular of end group and band functional group react, and give the certain polarity of PPO or reactivity; (3) PPO and other macromolecule or Small molecular obtain new material by grafting or block copolymerization; Etc..
The present invention preferably uses modification, especially the polyphenylene oxide resin of physical modification.In the polyphenylene oxide resin of physical modification, the present invention preferably introduces polystyrene (PS) resin being both amorphous polymer in polyphenylene oxide resin.Pure PPO/PS toughness is poor, therefore, usually add rubber-like macromolecule to put forward heavy alloyed impact property, the impact modifying agent added mainly contains the polymer of styrene units, as SBR, SBS, SEBS, ABS, SAN, MBS, MAS, EPDM-g-PS, HIPS, PS-g-MA etc.
In a preferred embodiment of the invention, the present invention introduces polystyrene (PS) resin that is both amorphous polymer and is equipped with appropriate hydrogenated styrene-butadiene-styrene (SEBS), blending and modifying in polyphenylene oxide resin.The modified processing fluidity of powder in sintering system that makes obtains certain increasing, and overall toughness and impact strength improve, thus the mechanical strength that body is adding the last entirety of activated carbon powder can not be reduced.
Usually, the consumption proportion of polyphenylene oxide, polystyrene and hydrogenated styrene-butadiene-styrene is: 100 weight portions: 5-30 weight portion: 1-10 weight portion.In one embodiment, the consumption proportion of polyphenylene oxide, polystyrene and hydrogenated styrene-butadiene-styrene is: 100 weight portions: 10-20 weight portion: 3-6 weight portion.
The present invention uses the polyphenylene oxide that melt index is low, molecular weight is higher usually, at utmost to ensure to show residual adhesion between particle, is unlikely to the forfeiture that closed pore causes permeability.
Therefore, in one embodiment, the present invention uses melt index to be less than the polyphenylene oxide of 5g/10min, is preferably less than the polyphenylene oxide of 3g/10min.In the present invention, melt index adopt ASTM D 1238 260 DEG C, record under 5.0kgf condition.
In one embodiment, the present invention use number-average molecular weight higher than 500,000 polyphenylene oxide, the such as polyphenylene oxide of 800,000-100 ten thousand molecular weight.
Usually, by polyphenylene oxide feed particles through freezing (such as using liquid nitrogen frozen), after making body embrittlement, use pulverizer broken.With multilayer screen cloth, gained powder is sieved through row and classifies as 20-60 order (20 orders≤d < 60 order) subsequently, 60-100 order (60 order < d≤100 order), more than 100 orders (d>100 order) three classes use for proportioning.
In one embodiment, in polyphenylene oxide particles, 20%-50% is 20-60 order, and 30%-80% is 60-100 order, and 0%-30% is more than 100 orders.100% is equaled after the percentage of the particle of each scope.
In one embodiment, polyphenylene oxide particles contains the particle of the 20-60 order (20 orders≤d < 60 order) of 30%-40%, the particle of more than particle of 60-100 order (60 order < d≤100 order) of 40%-70% and 100 orders of 0%-20% (d > 100 order), wherein, the percentage sum of the particle in each magnitude range equals 100%.
To active carbon powder through row screening, select 10-200 order, preferably 60-100 object active carbon powder.With the ratio of the active carbon powder of every 100 parts by weight of polyphenyleneoxide particle 3-20 weight portions, polyphenylene oxide and active carbon powder are dropped in mixer.That drops into also can comprise polystyrene and hydrogenated styrene-butadiene-styrene simultaneously.Usually, every 100 parts by weight of polyphenyleneoxide particles drop into the polystyrene of 5-30 weight portion, preferably 10-20 weight portion and the hydrogenated styrene-butadiene-styrene of 1-10 weight portion, preferably 3-6 weight portion.
Stir and usually carry out under 800-1300rpm/min.Whipping process need make raw material be warming up to 100-130 DEG C, preferably carry out between 110-120 DEG C, and maintain 1-4 hour, preferred 2-3 hour.
Usually the mixture be stirred is added in mould.Mould can have various required configuration.Usually, to dies cavity through row wiping, until any surface finish, clean, evenly apply one deck releasing agent then to mold cavity surfaces.Inject from charge door the polyphenylene oxide and active carbon mixed material shutoff charge door that prepare after assembling mould.Mould is put into sintering furnace, and is filled with inert gas (as nitrogen).Then sinter.Sintering temperature is generally 220-290 DEG C, and sintering time is generally 3-6 hour.
After sintering, take out mould with the mode of hardening or air natural cooling mode to mould through row cooling down until room temperature.Then dismantle mould, take out goods.These are all the technological means of this area routine.
The polyphenylene oxide resin powder that the present invention is distributed by assembly different-grain diameter, even aperture distribution is obtained by sintering process, the polyphenylene oxide micropore filter material that porosity is high and controlled while at introducing active carbon and by polystyrene, hydrogenated styrene-butadiene-styrene blending and modifying.The present invention can make up many deficiencies of existing more than 100 DEG C fire resistant filter material manufacture methods, product size shape is unrestricted, product microstructure is controlled, can 100% be reached to the filter efficiency of more than 10 μm dust, can more than 99% be reached to the filter efficiency of dust between 5-10 μm, also can show very high filter efficiency for the dust of 2.5-5 μm.
The scope that the deduster that filtering material of the present invention is made relates to application in prevention and control of air pollution is: thermal power plant, the ironmaking of iron and steel enterprise, steel-making, coking, the hot rolling of Metallurgical Enterprise, finish rolling, cold rolling, breaking down, the sealing wire of Steel Pipe Enterprise, cement industry, lime industry, tobacco business, glass industry, mine and military industry etc.The wherein comparatively typically dedusting application of filtering material of the present invention in cold rolling acid regeneration workshop.Workshop dust temperature arrives 127 DEG C, and containing a large amount of hydrochloric acid aerosols in dusty gas, to instead of service life short, in the fiber bag precipitator situation that discharge precision is low, substantially increase the efficiency of online production, optimize the consecutive production of the operation of rolling, ensure that the recycling of regenerated acid, improve the product quality that plate is rolled in cold rolling acid.As can be seen here, the filtering material of polyphenylene oxide and active carbon sinter molding is a gas dirt separating and filtering material with quite large industrial production potentiality.
Certainly, existing or commercially available Noryl also can be adopted to implement the present invention.Preferably, these Noryls are the polyphenylene oxide of physical modification, are more preferably PS Noryl, the polyphenylene oxide of further preferably PS/SEBS modification.When using existing or commercially available Noryl to implement of the present invention, as mentioned before, first this Noryl is ground into the particle of above-mentioned particle size range, and then will mixes with active carbon by these particles according to the above ratio.All the other preparation conditions are identical.
Other aspects of the present invention, due to disclosure herein, are apparent to those skilled in the art.
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, measures according to national standard usually.If there is no corresponding national standard, then according to general international standard, normal condition or carry out according to the condition that manufacturer advises.Unless otherwise indicated, otherwise all numbers are weight portion, and all percentage is weight percentage, and described polymer molecular weight is number-average molecular weight.
As no specific instructions, various raw material of the present invention all can be obtained by commercially available; Or prepare according to the conventional method of this area.
Unless otherwise defined or described herein, all specialties used herein and scientific words and those skilled in the art the meaning be familiar with identical.In addition any method similar or impartial to described content and material all can be applicable in the inventive method.
Preparation example
Embodiment 1
Get the polyphenylene ether powder raw material screened, take following raw materials according by ratio of weight and the number of copies: polyphenylene oxide (20-60 order) 70 parts, polyphenylene oxide (60-100 order) 30 parts, polystyrene 10 parts, hydrogenated styrene-butadiene-styrene 3 parts.The powder stock taken is injected in ready mould after high-speed stirred fully mixes, subsequently mould is put into the sintering furnace being full of nitrogen, be warming up to 220 DEG C and keep 5h.Goods are taken out after finally taking out mould Temperature fall to room temperature.
Embodiment 2
Get the polyphenylene ether powder raw material screened, take following raw materials according by ratio of weight and the number of copies: polyphenylene oxide (20-60 order) 70 parts, polyphenylene oxide (60-100 order) 30 parts, polystyrene 10 parts, hydrogenated styrene-butadiene-styrene 3 parts.The powder stock taken is injected in ready mould after high-speed stirred fully mixes, subsequently mould is put into sintering furnace, be warming up to 260 DEG C and keep 4h.Finally take out mould in the mode of hardening to mould through row cooling down until take out goods after room temperature.
Embodiment 3
Get the polyphenylene ether powder raw material screened, take following raw materials according by ratio of weight and the number of copies: polyphenylene oxide (20-60 order) 70 parts, polyphenylene oxide (60-100 order) 30 parts, polystyrene 20 parts, hydrogenated styrene-butadiene-styrene 5 parts, active carbon 5 parts.The powder stock taken is injected in ready mould after high-speed stirred fully mixes, subsequently mould is put into the sintering furnace being full of nitrogen, be warming up to 230 DEG C and keep 4h.Goods are taken out after finally taking out mould Temperature fall to room temperature.
Embodiment 4
Get the polyphenylene ether powder raw material screened, take following raw materials according by ratio of weight and the number of copies: polyphenylene oxide (20-60 order) 70 parts, polyphenylene oxide (60-100 order) 30 parts, polystyrene 20 parts, hydrogenated styrene-butadiene-styrene 5 parts, active carbon 10 parts.The powder stock taken is injected in ready mould after high-speed stirred fully mixes, subsequently mould is put into sintering furnace, be warming up to 280 DEG C and keep 3h.Finally take out mould in the mode of hardening to mould through row cooling down until take out goods after room temperature.
Test case
Shown in each embodiment table 1 composed as follows:
Table 1
Physics and the permeability test result of each embodiment are as shown in table 2 below:
Table 2
| Performance indications | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Hot strength | Mpa | 7.2 | 8 | 8.2 | 7.8 |
| Elongation at break | ％ | 32 | 34 | 30 | 32 |
| Bending strength | Mpa | 8 | 8.1 | 8.1 | 7.8 |
| Vicat softening temperature | ℃ | 155 | 155 | 155 | 155 |
| BET specific surface area | m 2/g | 2.112 | 2.008 | 2.215 | 2.258 |
Hot strength is according to GB/T 1040.2/1B-2006 test, and elongation at break is according to GB/T1040.2/1B-2006 test, and bending strength is according to GB/T 9341-2008 test.Universal testing machine is used to test.
Vicat softening temperature is according to GB/T 1633-2000 test, and test condition is 1kg, 50 DEG C/h, and instrument is thermal deformation dimension card temperature analyzer.
BET specific surface area adopts cryogenic nitrogen physical absorption (static capacity method) to test, and adopts full-automatic specific area and lacunarity analysis instrument to test.
Use optical particle counter (OPC) to test the sample filtering efficiency performance test of sample, optical particle counter (OPC) at least comprises 0.3 μm, 0.5 μm (0.1-10) μm particle size range planted agent, 1 μm, 2 μm, 5 μm, 10 μm at interior five grades.
Following table 3 shows the filter efficiency performance of embodiment 2 filtering material, and table 4 is the filter efficiency performance data of embodiment 3 filtering material.
Table 3
Table 4
2.83L hurdle represents that optical particle counter (OPC) one-period extracts number of particles contained in 2.83L gas, unit: individual.
1m
3hurdle represents contained 5 μm and 0.5 μm of number of particles in 1 cubic meter of gas, unit: individual.
The all documents mentioned in the present invention are quoted as a reference all in this application, are just quoted separately as a reference as each section of document.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read foregoing of the present invention, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (10)
1. a filtering material, is characterized in that, described filtering material is sintered by polyphenylene oxide resin and optional active carbon and makes.
2. filtering material as claimed in claim 1, is characterized in that, described filtering material is sintered by polyphenylene oxide resin and active carbon and makes, and wherein, the ratio of described polyphenylene oxide resin and active carbon is every 100 parts by weight of polyphenyleneoxide resin 3 ~ 20 parts by weight of activated carbon.
3. filtering material as claimed in claim 1 or 2, it is characterized in that, described polyphenylene oxide resin is physical modification polyphenylene oxide resin.
4. the filtering material according to any one of claim 1-3, is characterized in that, described filtering material has following one or more feature:
(1) 260 DEG C, 5.0kgf is less than 5g/10min according to the melt index of the polyphenylene oxide that ASTM D 1238 records;
(2) described filtering material is also containing polystyrene and hydrogenated styrene-butadiene-styrene, for implementing physical modification to described polyphenylene oxide;
(3) consumption proportion of polyphenylene oxide, polystyrene and hydrogenated styrene-butadiene-styrene is: 100 weight portions: 5-30 weight portion: 1-10 weight portion;
(4) consumption proportion of polyphenylene oxide, polystyrene, hydrogenated styrene-butadiene-styrene and active carbon is: 100 weight portions: 5-30 weight portion: 1-10 weight portion: 3-20 weight portion; With
(5) described filtering material inside has the network-like through hole of 2-10 μm of size, and wherein, described network-like through hole is isotropic three-D space structure.
5. prepare the method for filtering material for one kind, it is characterized in that, the method comprises: the mixture of polyphenylene oxide particles, polystyrene, hydrogenated styrene-butadiene-styrene and optional active carbon is placed in mould, sinter under not higher than the crystallization temperature of polyphenylene oxide, after cooling, obtain described filtering material.
6. method as claimed in claim 5, it is characterized in that, described method comprises following one or more feature:
(1) described mixture stirs in advance at 100-130 DEG C, preferably 110-120 DEG C;
(2) lasting 1-4 hour is stirred;
(3) speed of agitator is 800-1300rpm/min;
(4) sintering is at inert gas, as carried out in nitrogen;
(5) sintering carries out at 220-290 DEG C;
(6) sintering time is 2-8 hour;
(7) in polyphenylene oxide particles, the granular size d of 20%-50% is 20 orders≤d < 60 order, 30%-80% is 60 order < d≤100 orders, 0%-30% is d > 100 order, and the percentage sum of the particle of each scope equals 100%; With
(8) activated carbon granule is 10-200 order, preferred 60-100 order.
7. the method as described in claim 5 or 6, is characterized in that, described method has one or several feature following:
(a) 260 DEG C, 5.0kgf is less than 5g/10min according to the melt index of the polyphenylene oxide that ASTM D 1238 records;
B the consumption proportion of () polyphenylene oxide, polystyrene and hydrogenated styrene-butadiene-styrene is: 100 weight portions: 5-30 weight portion: 1-10 weight portion;
C the consumption proportion of () polyphenylene oxide, polystyrene, hydrogenated styrene-butadiene-styrene and active carbon is: 100 weight portions: 5-30 weight portion: 1-10 weight portion: 3-20 weight portion;
D, in () polyphenylene oxide particles, the granular size d of 30%-40% is 20-60 order, 40%-70% is 60-100 order and 0%-20% is more than 100 orders; Wherein, the percentage sum of the particle in each magnitude range equals 100%; With
E () described filtering material inside has the network-like through hole of 2-10 μm of size, wherein, described network-like through hole is isotropic three-D space structure.
8. adopt the filtering material that the method according to any one of claim 5-7 prepares.
9. the filtering material according to any one of claim 1-4 or filtering material according to claim 8 at steel industry, cement industry, lime industry, tobacco business, glass industry, the purposes in mine and military industry in Chalk-dust filtering.
10. polyphenylene oxide resin is preparing the application in filtering material as main filtration composition and optional active carbon.
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