CN114939399A - Environment-friendly composite material for preventing toxic gas and preparation method thereof - Google Patents
Environment-friendly composite material for preventing toxic gas and preparation method thereof Download PDFInfo
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- CN114939399A CN114939399A CN202210631293.8A CN202210631293A CN114939399A CN 114939399 A CN114939399 A CN 114939399A CN 202210631293 A CN202210631293 A CN 202210631293A CN 114939399 A CN114939399 A CN 114939399A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C1/00—Building elements of block or other shape for the construction of parts of buildings
- E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention relates to the field of environment-friendly materials, in particular to an environment-friendly composite material for preventing toxic gas and a preparation method thereof, wherein the preparation method comprises the following steps: adding the recycled straws to an adding port of the device, and automatically dropping and adding the straws through downhill inclination; during the falling process, the straws are cut and crushed by crushing, and fall into the inner cylinder; uniformly adding activated carbon powder by an automatic reciprocating adder; after being crushed, the active carbon powder is automatically added, so that the carbon powder is uniformly scattered in the straw pile; the active carbon powder is uniformly inserted into the straw pile by inclining and automatically falling and being extruded by a hot drying jack; uniformly adding lignin by an automatic reciprocating adder; continuously falling to carry out hot-pressing extrusion forming on the straw pile with the lignin and the activated carbon powder; pushing the two formed straw blocks to fall and recover respectively through a separation propeller; the invention has the beneficial effect that the recycled straws are processed into the specified shape and used in the hollow bricks for carrying out toxic gas adsorption and batch use on the building environment.
Description
Technical Field
The invention relates to the field of environment-friendly materials, in particular to an environment-friendly composite material for preventing toxic gas and a preparation method thereof.
Background
The composite material formed by chemical compositions is more and more widely used, and the use requirement on special environment is higher and higher; the sub-patent No. CN201910543735.1 discloses an environment-friendly composite material for preventing toxic gases, wherein the outermost layer adopts an activated carbon layer, and an adsorption degradation fiber membrane is deposited on the inner side surface of the activated carbon layer by adopting an electrostatic spinning method to be used as an adsorption degradation layer; in the electrostatic spinning solution, modified nano TiO2 particles and acidified diatomite are adopted to modify polyethylene oxide to obtain composite fibers, and in the process of preparing modified nano TiO2, nano TiO2 is used as a raw material, ultrapure water is used as a main solvent, and N-methyl pyrrolidone is used as an N source and a secondary solvent, so that the photocatalytic capacity of nano TiO2 is improved; meanwhile, the surface of the nano TiO2 particle subjected to the hydrothermal modification process contains rich hydroxyl (-OH), so that the nano TiO2 particle can penetrate into the activated carbon cloth and has grafting and bonding effects with oxygen-containing groups on the activated carbon step fiber, and the adsorption fastness of the modified nano TiO2 is improved. But the composite material produced by the equipment does not have the capacity of being used for adsorption treatment in the toxic environment of buildings.
Disclosure of Invention
The invention aims to provide an environment-friendly composite material for preventing toxic gas and a preparation method thereof, and has the beneficial effects that the recycled straws are processed into a specified shape and used in hollow bricks to adsorb toxic gas in a building environment for batch use.
The purpose of the invention is realized by the following technical scheme: a preparation method of an environment-friendly composite material for preventing toxic gas comprises the following steps:
step one, adding the recycled straws to an adding port of the device, and automatically dropping and adding the straws through downhill inclination;
step two, cutting and crushing the straws through crushing in the falling process, and falling the straws into the inner cylinder;
step three, uniformly adding activated carbon powder by an automatic reciprocating adder; after being crushed, the active carbon powder is automatically added, so that the carbon powder is uniformly scattered in the straw pile;
step four, the activated carbon powder is uniformly inserted into the straw pile by automatically falling in an inclined manner and extruding through a hot drying jack;
step five, uniformly adding lignin by an automatic reciprocating adder; continuously falling to carry out hot-pressing extrusion forming on the straw pile with the lignin and the activated carbon powder; the two formed straw blocks are respectively pushed by a separating propeller to fall and be recovered, and the two formed straw blocks are filled into the hollow brick for gas-defense adsorption.
The straw cutting and crushing device comprises fixed supporting cylinders, rotating limiting cylinders and a processing rack, wherein the two fixed supporting cylinders are fixed in the processing rack, the rotating limiting cylinders are limited and rotated between the rotating limiting cylinders, fixed adding fins for adding shearing are fixed in the fixed supporting cylinder on one side, and rotating stirring fins for cutting and crushing straws are fixed in the rotating limiting cylinders; the inner end of the fixed supporting cylinder is fixed with a falling processing inner cylinder for falling addition.
The inner end of the processing rack is fixed with a fixed driving table for supporting driving, a combined driver is fixed in the fixed driving table, the combined driver is connected with a driving shaft through a coupler and rotates in the fixed driving table, and the driving shaft is driven by a gear to be meshed with a hot-pressing mixer and a hot-pressing former and rotates in the processing rack.
The active carbon powder feeder and the lignin feeder for adding active carbon powder and lignin are fixed at the side end of the processing rack, and the separation propeller for separating and recovering is fixed at the tail end of the processing rack.
The environment-friendly straw board comprises straw powder, lignin and activated carbon powder.
Through in the straw insertion device with agricultural recovery, add through the automatic whereabouts of inclination, smash earlier, form the tiny graininess of straw, add activated carbon powder afterwards, dry by the fire through the hot pressing and insert, make the straw keep dry, and mix activated carbon powder in the straw, through the automatic even interpolation of lignin, make the straw granule have lignin and receive hot briquetting's extrusion, and form appointed different shapes, whereabouts after accomplishing machine-shaping, straw board recycle after the solidification of different patterns, insert in the fixed hollow brick of building support, carry out the absorption of large tracts of land contact to the toxic gas in the building, accomplish the use, it can to take out the processing, when the guarantee inhales toxic gas, the installation of guarantee building is used, simultaneously, the recycle's of waste material is effectively ensured to use through the straw of retrieving.
Drawings
FIG. 1 is a schematic flow diagram of the material preparation of the present invention;
FIG. 2 is a schematic view of the crushing apparatus according to the present invention;
FIG. 3 is a schematic structural view of a drop processing drum of the present invention;
FIG. 4 is a schematic diagram of the combined drive of the present invention;
FIG. 5 is a first schematic diagram of the hot-press mixer of the present invention;
FIG. 6 is a second schematic structural view of the hot-press mixer of the present invention;
FIG. 7 is a schematic structural view of a hot press former of the present invention;
FIG. 8 is a schematic structural view of the activated carbon powder adder according to the present invention;
FIG. 9 is a first schematic view of the construction of the processing rack of the present invention;
FIG. 10 is a second schematic view of the construction of the processing rack of the present invention;
FIG. 11 is a schematic structural view of the entirety of the present invention;
FIG. 12 is a schematic structural view of the entirety of the present invention;
FIG. 13 is a schematic view of the configuration of the partitioned impeller of the present invention; .
In the figure: a fixed support cylinder 1; rotating the limiting cylinder 2; fixing the adding fin 3; rotating the stirring fin 4; dropping the processing inner cylinder 5; an activated carbon powder adder 6; a lignin adder 7; a hot-press mixer 8; a hot press former 9; a combination driver 10; a drive shaft 11; a stationary drive table 12; co-extruding the boss 13; a hybrid spring shaft 14; a lower hot-pressed mixing plate 15; an upper heat press insertion plate 16; carrying out hot press molding on the boss 17; compression molding the spring shaft 18; a forming frame 19; hot-pressing the molded plate 20; an addition driver 21; an additive drive slide 22; adding a threaded cylinder 23; a processing frame 24; a partition pusher 25; a partition driver 26; the partition drive slide plate 27; a spring separating plate 28.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in the embodiments illustrated herein,
through in the straw insertion device with agricultural recovery, add through the automatic whereabouts of inclination, smash earlier, form the tiny graininess of straw, add activated carbon powder afterwards, dry by the fire through the hot pressing and insert, make the straw keep dry, and mix activated carbon powder in the straw, through the automatic even interpolation of lignin, make the straw granule have lignin and receive hot briquetting's extrusion, and form appointed different shapes, whereabouts after accomplishing machine-shaping, straw board recycle after the solidification of different patterns, insert in the fixed hollow brick of building support, carry out the absorption of large tracts of land contact to the toxic gas in the building, accomplish the use, it can to take out the processing, when the guarantee inhales toxic gas, the installation of guarantee building is used, simultaneously, the recycle's of waste material is effectively ensured to use through the straw of retrieving.
Further optimization in conjunction with the above examples:
further, the working process of the preparation method of the environment-friendly composite material for preventing toxic gas shown in fig. 2, 3, 11 and 12 is as follows:
the recycled straws are inserted into the fixed adding fins 3 of the fixed supporting cylinder 1 through the opening of the processing frame 24 and fall, the driving shaft 11 is driven to rotate in an engaged manner through the driving of the combined driver 10, so that the rotating limiting cylinder 2 rotates and drives the rotating stirring fins 4 to rotate, the straws are cut continuously through the shearing force which is attached to the fixed adding fins 3, the straws are crushed, and the crushed straws fall and are added into the falling processing inner cylinder 5.
Further optimization in conjunction with the above examples:
further, the working process of the preparation method of the environment-friendly composite material for preventing toxic gas according to the embodiment shown in fig. 3, 4, 11 and 12 is as follows:
through the combined driving of the combined driver 10, the rotating driving shaft 11 is further driven to crush through meshing driving, and the hot-press mixing of the hot-press mixer 8 and the hot-press forming of the hot-press former 9 are further driven to form an integral driving, so that a driving guarantee is formed for the forming of the final product of the straw.
Further optimization in conjunction with the above examples:
further, the working process of the preparation method of the environment-friendly composite material for preventing toxic gas according to the embodiment shown in fig. 3, 4, 11 and 12 is as follows:
through the drive of active carbon powder adder 6 and lignin adder 7 on the processing frame 24, and then constantly down add active carbon and lignin in the processing inner tube 5 that falls, active carbon powder adds after smashing the straw, and lignin adds after accomplishing the stoving coextrusion, carries out reciprocal stable interpolation through active carbon powder adder 6 and lignin adder 7, and the guarantee adds dispersion effect.
Further optimization in conjunction with the above examples:
further be provided with in the drive meshing hot pressing blender 8 and rotate the spacing section of thick bamboo 2 of rotation between two fixed stay section of thick bamboo 1, evenly be fixed with in the spacing section of thick bamboo 2 and be used for extrudeing driven co-extrusion boss 13, co-extrusion boss 13 laminating drive hybrid spring axle 14 extrudees in the whereabouts processing inner tube 5, the inner of two hybrid spring axles 14 is fixed with hot pressing hybrid board 15 down and goes up hot pressing insert plate 16 respectively, peg graft each other between hot pressing hybrid board 15 and the last hot pressing insert plate 16 down.
The working process of the part according to an example of the preparation method of the environment-friendly composite material for preventing toxic gas shown in fig. 4, 5, 6 and 11 is as follows:
the straw and the added active carbon fall into a hot-pressing mixer 8 through a falling processing inner cylinder 5, a driving mixed spring shaft 14 is extruded through a mixed extrusion boss 13 on a rotating limiting cylinder 2 rotating in the hot-pressing mixer 8, a spring on the driving mixed spring shaft 14 is sleeved between the falling processing inner cylinder 5 and a support table, the intermittent driving processing is ensured to be completed through driving, the two driving mixed spring shafts 14 are simultaneously and symmetrically extruded inwards, a lower hot-pressing mixed plate 15 and an upper hot-pressing insertion plate 16 are electrified to generate heat through an electrothermal resistance wire, so that the lower hot-pressing mixed plate 15 and the upper hot-pressing insertion plate 16 carry out hot pressing on the straw with the active carbon powder, and the straw pile is continuously mixed and inserted with the active carbon powder through a plurality of block splicing between the lower hot-pressing mixed plate 15 and the upper hot-pressing insertion plate 16 to realize the effects of drying, mixing and use, after completion, the inner tube 5 is dropped by the drop processing to form the continuous processing.
Further optimization in conjunction with the above examples:
further be provided with the rotation spacing section of thick bamboo 2 of rotating between two fixed stay section of thick bamboo 1 in the hot briquetting ware 9, evenly be fixed with the thermoforming boss 17 that is used for the extrusion in the rotation spacing section of thick bamboo 2, the thermoforming boss 17 laminating drive compression shaping spring shaft 18 extrudees in the processing inner tube 5 of whereabouts, two compression shaping spring shafts 18 are fixed with interior forming frame 19 and hot briquetting board 20 respectively, and interior forming frame 19 grafting shaping is at hot briquetting board 20.
The working process of the part according to an example of the preparation method of the environment-friendly composite material for preventing toxic gas shown in fig. 3, 4, 7 and 11 is as follows:
straw after mixing is piled through the stoving takes the lignin to fall into in the hot briquetting ware 9, evenly set up a plurality of hot briquetting bosss 17 extrude pressurized forming spring shaft 18 on the spacing section of thick bamboo 2 of rotation through the hot briquetting ware 9 internal rotation, the spring housing on the drive pressurized forming spring shaft 18 is between whereabouts processing inner tube 5 and brace table, the guarantee accomplishes intermittent drive's processing through the drive, the pressurized forming spring shaft 18 of symmetry is inwards symmetrical extrusion simultaneously, become frame 19 and hot briquetting board 20 circular telegram and generate heat through the electric heat resistance wire, and then make the straw that frame 19 will have the lignin pile add to hot briquetting board 20 in the extrusion of being heated and melt lignin postcure shaping, fashioned straw piece whereabouts of fashioned straw piece after resetting is separated through separating propeller 25 propulsion and is separated and is discharged.
Further optimization in conjunction with the above examples:
further, the forming frame 19 is matched with the hot-press forming plate 20 for forming and combining.
The working process of the part according to an example of the preparation method of the environment-friendly composite material for preventing toxic gas shown in figures 3, 4, 7 and 11 is as follows:
select supporting shaping frame 19 and the combination of hot pressing profiled sheeting 20 through the inside shape of the hollow brick that combines the building to use needs, form and carry out the shaping extrusion to the solid form straw piece of different pattern specifications, insert the fashioned straw piece in the hollow brick, through the building environment who uses, toxic gas in the building environment carries out the absorption of large tracts of land contact, and then realize building toxic gas's absorption, prevent to leak, accomplish a absorption back, it can to take out the straw piece and handle, effectively reduce the cost of detoxication gas.
Further optimization in conjunction with the above examples:
an adding driver 21 for reciprocating drive control is fixed in the activated carbon powder adding device 6, the adding driver 21 is connected with an adding drive sliding seat 22 through a threaded cylinder and a bolt in a threaded matching manner, the adding drive sliding seat 22 is limited to transversely slide at the upper end of the falling processing inner cylinder 5, and an adding threaded cylinder 23 is connected to the adding drive sliding seat 22 through a threaded matching manner; the lignin feeder 7 has the same structure and connection mode as the activated carbon powder feeder 6, and activated carbon powder or lignin is added into the addition threaded cylinder 23.
The working process of the part according to an example of the preparation method of the environment-friendly composite material for preventing toxic gas shown in fig. 4, 8, 11 and 12 is as follows:
the positive and negative rotation of the adding driver 21 is driven through frequency conversion control, and the adding driving slide 22 is driven to reciprocate in the falling processing inner cylinder 5 through the thread matching of the thread cylinder and the bolt, so that the active carbon powder or lignin on the adding thread cylinder 23 is uniformly added in a left-right reciprocating motion; different raw materials are added through position rotation, and the processing of products is promoted by effectively combining the device while the dispersing and adding are guaranteed.
Further optimization in conjunction with the above examples:
further, the inner wall of the falling processing inner cylinder 5 is inclined downwards from left to right.
The working process of the part according to an example of the preparation method of the environment-friendly composite material for preventing toxic gas shown in fig. 3, 4, 11 and 12 is as follows:
through the downward sloping setting from left to right, through the whereabouts of the automatic interpolation of the effective guarantee raw material straw of slope whereabouts, effectively smash, hot pressing stoving and hot briquetting, avoid the falling speed too fast to influence the processing effect, also avoid the whereabouts too slowly simultaneously, influence the processing of product.
The fixed connection in the device can be fixed by welding, insert block combination and fixation, casting integral forming and fixation, thread fixation and the like, and the adaptive selection is carried out by combining the mounting and dismounting modes; the rotary connection can mean that the bearing is arranged on a shaft in a drying way, a spring retainer ring groove or an inter-shaft baffle is arranged on the shaft or a shaft hole, the axial fixation of the bearing is realized by clamping an elastic retainer ring in the spring retainer ring groove or the inter-shaft baffle, and the rotation is realized by the relative sliding of the bearing; the limit sliding is a sliding mode which limits the sliding track, the sliding direction and the position by the fit and matching sliding of a sliding block with a ball body or a bearing and the like for reducing the resistance and a sliding groove and limits the position by the limit; different connection modes are used for further distinguishing and using in combination with different using environments.
Claims (10)
1. A preparation method of an environment-friendly composite material for preventing toxic gas is characterized by comprising the following steps: the method comprises the following steps:
step one, adding the recycled straws to an adding port of the device, and automatically dropping and adding the straws through downhill inclination;
step two, cutting and crushing the straws through crushing in the falling process, and falling the straws into the inner cylinder;
step three, uniformly adding activated carbon powder by an automatic reciprocating adder; after being crushed, the active carbon powder is automatically added, so that the carbon powder is uniformly scattered in the straw pile;
step four, the activated carbon powder is uniformly inserted into the straw pile by automatically falling in an inclined manner and extruding through a hot drying jack;
step five, uniformly adding lignin by an automatic reciprocating adder; continuously falling to carry out hot-pressing extrusion forming on the straw pile with the lignin and the activated carbon powder; the two formed straw blocks are respectively pushed by a separating propeller to fall and be recovered, and the two formed straw blocks are filled into the hollow brick for gas-defense adsorption.
2. The preparation method of the environment-friendly composite material for preventing toxic gases according to claim 1, wherein the environment-friendly composite material comprises fixed supporting cylinders (1), a rotating limiting cylinder (2) and a processing rack (24), the two fixed supporting cylinders (1) are fixed in the processing rack (24), the rotating limiting cylinder (2) is limited to rotate between the rotating limiting cylinders (2), a fixed adding fin (3) for adding shearing is fixed in the fixed supporting cylinder (1) on one side, and a rotating stirring fin (4) for rotatably shearing and crushing straws is fixed in the rotating limiting cylinder (2); the inner end of the fixed supporting cylinder (1) is fixed with a falling processing inner cylinder (5) for falling addition.
3. The method for preparing the environment-friendly composite material for preventing the toxic gas as claimed in claim 2, wherein a fixed driving platform (12) for supporting and driving is fixed at the inner end of the processing rack (24), a combined driver (10) is fixed in the fixed driving platform (12), the combined driver (10) is connected with a driving shaft (11) through a coupler and rotates in the fixed driving platform (12), and the driving shaft (11) is in driving engagement with the hot-pressing mixer (8) and the hot-pressing former (9) through gears and rotates in the processing rack (24).
4. The method for preparing the environment-friendly composite material for preventing toxic gases according to claim 2, wherein an activated carbon powder adder (6) and a lignin adder (7) for adding activated carbon powder and lignin are fixed at the side ends of the processing rack (24), and a separation propeller (25) for separating and recycling is fixed at the tail end of the processing rack (24).
5. The method for preparing the environment-friendly composite material for preventing toxic gases according to claim 3, wherein a rotation limiting cylinder (2) which rotates between two fixed supporting cylinders (1) is arranged in the driving meshing hot-pressing mixer (8), a mixed extrusion boss (13) for extrusion driving is uniformly fixed in the rotation limiting cylinder (2), the mixed extrusion boss (13) is attached to and drives a mixed spring shaft (14) to extrude in the falling processing inner cylinder (5), a lower hot-pressing mixing plate (15) and an upper hot-pressing insertion plate (16) are respectively fixed at the inner ends of the two mixed spring shafts (14), and the lower hot-pressing mixing plate (15) and the upper hot-pressing insertion plate (16) are mutually inserted and connected.
6. The preparation method of the environment-friendly composite material for preventing toxic gases according to claim 3, wherein a rotation limiting cylinder (2) which rotates between the two fixed supporting cylinders (1) is arranged in the hot press former (9), hot press forming bosses (17) for extrusion forming are uniformly fixed in the rotation limiting cylinder (2), the hot press forming bosses (17) are attached to drive compression forming spring shafts (18) to extrude in the falling processing inner cylinder (5), the two compression forming spring shafts (18) are respectively fixed with an inner forming frame (19) and a hot press forming plate (20), and the inner forming frame (19) is inserted and formed on the hot press forming plate (20).
7. The method for preparing environment-friendly composite material for preventing toxic gas according to claim 6, wherein the forming frame (19) is matched and formed with the hot-press forming plate (20).
8. The preparation method of the environment-friendly composite material for preventing toxic gases according to claim 4, wherein an adding driver (21) for reciprocating driving control is fixed in the activated carbon powder adding device (6), the adding driver (21) is in threaded fit connection with an adding driving sliding seat (22) through a threaded cylinder and a bolt, the adding driving sliding seat (22) is limited to transversely slide at the upper end of the falling processing inner cylinder (5), and the adding threaded cylinder (23) is in threaded fit connection with the adding driving sliding seat (22); the structure and the connection mode of the lignin adding device (7) are the same as those of the activated carbon powder adding device (6), and activated carbon powder or lignin is added into the adding threaded cylinder (23).
9. The method for preparing eco-friendly composite material for preventing toxic gas according to any one of claims 1 to 8, wherein the falling of the inner wall of the falling processing inner cylinder (5) is inclined downward from left to right.
10. The material prepared by the method for preparing the environment-friendly composite material for preventing toxic gases according to claim 1, wherein the material comprises straw powder, lignin and activated carbon powder.
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| CN202210631293.8A CN114939399A (en) | 2022-06-06 | 2022-06-06 | Environment-friendly composite material for preventing toxic gas and preparation method thereof |
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| CN202210631293.8A CN114939399A (en) | 2022-06-06 | 2022-06-06 | Environment-friendly composite material for preventing toxic gas and preparation method thereof |
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