CN114771077B - Gel felt surface treatment equipment and modification method - Google Patents

Gel felt surface treatment equipment and modification method Download PDF

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Publication number
CN114771077B
CN114771077B CN202210465099.7A CN202210465099A CN114771077B CN 114771077 B CN114771077 B CN 114771077B CN 202210465099 A CN202210465099 A CN 202210465099A CN 114771077 B CN114771077 B CN 114771077B
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CN
China
Prior art keywords
film
roller
gel felt
felt
conveyor belt
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CN202210465099.7A
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Chinese (zh)
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CN114771077A (en
Inventor
潘广镇
张继承
张东生
张蔓蔓
陈帅
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Gongyi Van Research Yihui Composite Material Co Ltd
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Gongyi Van Research Yihui Composite Material Co Ltd
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Priority to CN202210465099.7A priority Critical patent/CN114771077B/en
Publication of CN114771077A publication Critical patent/CN114771077A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0038—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving application of liquid to the layers prior to lamination, e.g. wet laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
    • D06B1/02—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by spraying or projecting
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/77—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof
    • D06M11/79—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with silicon or compounds thereof with silicon dioxide, silicic acids or their salts

Abstract

The invention relates to gel felt surface treatment equipment, wherein a spraying mechanism comprises an atomizing nozzle which is arranged on the upper surface and the lower surface of a hydrophobic gel felt and is used for spraying a hydrophilic modification reagent on the upper surface and the lower surface of the hydrophobic gel felt; the first conveying mechanism comprises a first conveying belt for conveying the hydrophobic gel felt; the frame body is arranged above the first conveyor belt; the first film covering mechanism is fixed on the frame body; the second film coating mechanism is arranged on the frame body and is spaced from the first film coating mechanism; the annular film is circularly transmitted between the first film covering mechanism and the second film covering mechanism; the first film covering mechanism and the second film covering mechanism respectively press and attach the annular film on the upper surface of the hydrophobic gel felt, and the lower surface of the hydrophobic gel felt is attached to the upper surface of the first conveyor belt; the hydrophilic treatment on the surface of the hydrophobic gel felt is homogenized, and the uniform coating and adhesion of the water-based paint are realized.

Description

Gel felt surface treatment equipment and modification method
Technical Field
The invention belongs to the field of heat insulation materials, and particularly relates to gel felt surface treatment equipment and a modification method.
Background
The gel felt is a flexible heat-insulating felt which is formed by compounding nanometer or metal aerogel serving as a main material with carbon fiber or ceramic glass fiber cotton or pre-oxidized fiber felt through a special process. It features low heat conductivity coefficient, certain tensile and compressive strength, and belongs to a new heat insulating material. The existing preparation technology of the gel felt generally adopts a silicon source, a solvent and a catalyst to prepare wet gel to be dried through hydrolysis, gel, aging and hydrophobization treatment, and then the wet gel is dried to obtain aerogel.
Along with the wide demands and the application of heat preservation and energy conservation in various fields, the application range of the gel felt is continuously enlarged, and the quality requirement of the aerogel felt is also continuously improved. In the using process of the existing gel felt, the powder falling is a problem that the gel fiber felt cannot be overcome in the production process, the gel fiber felt is difficult to degrade after being inhaled into a human body, and the powder falling gel felt can be normally used only by plastic packaging or coating paint when in use.
The water-based paint plastic package gel felt not only can realize the purpose of reducing cost, but also can realize green production which is harmless to human bodies and does not pollute the environment. However, when the water-based paint is coated on the gel felt, the water-based paint is difficult to coat and degum due to the hydrophobic property of the gel felt.
Disclosure of Invention
In view of the above, the present invention aims to provide a gel felt surface treatment device, so as to solve the technical problem that in the prior art, a water-based paint is not easy to coat on the surface of a hydrophobic gel felt; meanwhile, a gel felt surface modification method is also provided.
In order to achieve the above purpose, the technical scheme adopted by the gel felt surface treatment equipment of the invention is as follows:
a gel felt surface treatment apparatus comprising:
spraying mechanism: the spray nozzle is arranged at the upper side and the lower side of the hydrophobic gel felt and is used for spraying hydrophilic modification reagents on the upper surface and the lower surface of the hydrophobic gel felt;
a first conveying mechanism: comprises a first conveyor belt for conveying a hydrophobic gel felt;
frame body: is arranged above the first conveyor belt;
first tectorial membrane mechanism: is fixed on the frame body;
and a second film covering mechanism: the first film covering mechanism is arranged on the frame body at intervals;
annular membrane: the circulating transmission is arranged between the first film covering mechanism and the second film covering mechanism;
the first film covering mechanism and the second film covering mechanism respectively press and attach the annular film on the upper surface of the hydrophobic gel felt, and the lower surface of the hydrophobic gel felt is attached to the surface of the first conveyor belt.
The beneficial effects are that: the invention relates to a gel felt surface treatment device, which comprises a spraying mechanism for spraying hydrophilic modifier on the upper surface and the lower surface of a hydrophobic gel felt, wherein after the spraying mechanism sprays the hydrophilic modifier, a first conveying mechanism conveys the hydrophobic gel felt, in the conveying process of the hydrophobic gel felt, an annular membrane is circularly arranged between the first film-coating mechanism and the second film-coating mechanism through the first film-coating mechanism and the second film-coating mechanism, and is tightly attached to the upper surface of the hydrophobic gel felt under the action of the top pressure of the first film-coating mechanism and the second film-coating mechanism, and the lower surface of the hydrophobic gel felt is tightly attached to the upper surface of the first conveying belt, so that the hydrophobic gel felt sprayed with the hydrophilic modifier is in a non-wetting state on the upper surface and the lower surface of the hydrophobic gel felt, and after the annular membrane is conveyed by the first film-coating mechanism and the second film-coating mechanism, the annular membrane is tightly attached to the upper surface of the hydrophobic gel felt, and the first conveying belt is tightly attached to the lower surface of the hydrophobic gel felt, thereby the annular membrane is tightly attached to the upper surface of the first conveying belt, the hydrophilic modifier on the upper surface and the lower surface of the hydrophobic gel felt can be uniformly spread, and the hydrophilic modifier is uniformly spread on the hydrophilic gel coating, and the hydrophilic coating is uniformly spread on the surface of the hydrophilic coating.
Further, the first tectorial membrane mechanism is including fixing the support frame at the support body, rotates on the support frame and is equipped with first compression roller and the membrane synchronizing roll of being connected with first compression roller transmission, be connected through the hold-in range transmission between first compression roller and the membrane synchronizing roll, first compression roller is including the membrane synchronizing roller that is located both ends around and be located the membrane roller between two membrane synchronizing rollers, membrane synchronizing roller and the synchronous gyro wheel synchronous rotation of first conveyer belt drive membrane of messenger, the diameter of membrane roller is less than the diameter of membrane synchronizing roller to the gap confession hydrophobic gel felt and annular membrane between membrane roller and the first conveyer belt pass through when membrane synchronizing roller and the contact of first conveyer belt.
The beneficial effects are that: setting of a first press roller: firstly, the power of the first conveyor belt can be transmitted to the first film covering mechanism, so that the driving force of the first film covering mechanism is saved; secondly, the rotation speed of the first conveyor belt is guaranteed to be the same, so that the transmission speeds of the annular membrane and the hydrophobic gel felt are guaranteed to be the same, and abrasion of the annular membrane or abrasion of the hydrophobic gel felt caused by different transmission speeds of the annular membrane and the hydrophobic gel felt are avoided; and thirdly, film synchronous rollers are arranged at the front end and the rear end of the first press roller, a film pressing roller is arranged between the two film synchronous rollers, and the diameter of the film pressing roller is smaller than that of the film synchronous rollers so that a gap between the film pressing roller and the first conveyor belt is used for a hydrophobic gel felt and an annular film to pass through when the film synchronous rollers are contacted with the first conveyor belt.
Further, a second press roller is arranged above the film synchronizing roller, and the second press roller and the film synchronizing roller clamp the annular film together.
The beneficial effects are that: the friction force between the annular film and the film synchronous roller can be increased by the arrangement of the second press roller, and the annular film and the film synchronous roller are prevented from sliding relatively.
Further, the support frame comprises a fixed plate fixed on the frame body and a support connecting plate obliquely arranged relative to the fixed plate, a compaction adjusting structure for adjusting the inclination angle of the support connecting plate is arranged between the support connecting plate and the fixed plate, and the second compression roller is rotatably supported on the support connecting plate; the first compression roller is arranged below the side of the film synchronous roller, a tensioning wheel is arranged on the supporting connecting plate in an adjustable mode, and the tensioning wheel is arranged on the inner ring of the synchronous belt.
The beneficial effects are that: the pressing adjusting structure can adjust the pressure of the first press roller to the first conveyor belt by adjusting the inclination angle of the supporting connecting plate, so that friction force is generated between the first conveyor belt and the first press roller, and the first conveyor belt drives the first press roller to rotate; the setting of take-up pulley can guarantee the hold-in range tensioning between first compression roller and membrane synchronizing roll to avoid the hold-in range to skid between first compression roller and membrane synchronizing roll.
Further, compress tightly adjusting structure including fixing connecting rod and adjusting screw on the fixed plate, the one end of keeping away from the fixed plate of connecting rod is provided with the round hole that supplies adjusting screw to pass, and both sides are provided with the nut with adjusting screw thread adaptation about the round hole, and adjusting screw's lower extreme is articulated with the support connecting plate and is connected.
The beneficial effects are that: the compression adjusting structure is simple in arrangement, and the inclination angle of the support connecting plate can be conveniently adjusted through the distance between the connecting position of the adjusting screw and the connecting rod and the hinging position of the adjusting screw and the support connecting plate, so that the compression degree between the first compression roller and the first conveyor belt is adjusted.
The second film covering mechanism comprises a sliding seat, a film tensioning roller and a film tensioning guide shaft, wherein the sliding seat is arranged in a guiding sliding manner relative to the frame body, the film tensioning roller and the film tensioning guide shaft are rotatably arranged on the sliding seat, and the film tensioning roller and the film tensioning guide shaft are arranged at intervals up and down.
The beneficial effects are that: the second tectorial membrane mechanism structure can be for the whole slip of support body, sets up simply, easy dismounting.
Further, the support body is including controlling first stull and the second stull that the interval set up, second tectorial membrane mechanism sets up between first stull and second stull, fixedly on the slide be provided with the slide bar, the slide bar passes first stull with one end direction, wears to be equipped with tensioning spring on the slide bar, and tensioning spring is located between membrane tensioning roller and the first stull, and the one end of slide bar towards the second stull is fixed with the buffer block.
The beneficial effects are that: the tensioning spring is arranged to move the second film covering mechanism towards a direction away from the first film covering mechanism, but under the action of the annular film, the second film covering mechanism and the first film covering mechanism act together to tightly support and press the annular film on the first conveyor belt.
The gel felt surface treatment modification method adopts the following technical scheme:
s1: the spraying mechanism sprays hydrophilic modifying reagent on the upper surface and the lower surface of the hydrophobic gel felt respectively;
s2: the hydrophobic gel felt sprayed with the hydrophilic modification reagent is conveyed by a first conveyor belt and is coated between a first coating mechanism and a second coating mechanism.
The beneficial effects are that: according to the surface treatment modification method of the gel felt, hydrophilic modifier is sprayed on the upper side and the lower side of the hydrophobic gel felt through the spraying mechanism, after the hydrophilic modifier is sprayed on the upper side and the lower side of the hydrophobic gel felt through the spraying mechanism, the first conveying mechanism conveys the hydrophobic gel felt, in the conveying process of the hydrophobic gel felt, the annular membrane is circularly arranged between the first film covering mechanism and the second film covering mechanism through the first film covering mechanism and the second film covering mechanism, the annular membrane is tightly attached to the upper surface of the hydrophobic gel felt under the action of the top pressure of the first film covering mechanism and the second film covering mechanism, the lower surface of the hydrophobic gel felt is tightly attached to the upper surface of the hydrophobic gel felt, and in this way, the hydrophilic modifier is sprayed on the upper surface and the lower surface of the hydrophobic gel felt to form non-wetting liquid drops, after the annular membrane is conveyed through the first film covering mechanism and the second film covering mechanism, the annular membrane is tightly attached to the upper surface of the hydrophobic gel felt, the annular membrane is tightly attached to the lower surface of the hydrophobic gel felt, and therefore the annular membrane is tightly attached to the upper surface and the lower surface of the first film covering mechanism, the hydrophilic modifier is enabled to be uniformly spread on the upper surface of the hydrophobic gel felt, and the hydrophilic modifier is uniformly spread on the surface of the hydrophilic gel, or the hydrophilic coating is uniformly spread, and the hydrophilic coating is conveniently coated on the surface.
Further, the preparation step of the hydrophilic modification reagent comprises the following steps: adding a surface modifier and an inorganic acid solution into the precursor solution, uniformly mixing, and then adding an alkali solution; the mol ratio of the precursor solution to the surface modifier is 1:0.1-1:0.5; the concentration of the inorganic acid solution is 0.2-1 mol/L, and the addition amount of the inorganic acid solution is 4-5 when the pH value of the solution is reached; the concentration of the alkali solution is 0.5-2 mol/L, and the addition amount of the alkali solution is to adjust the pH value of the solution to 8.0-9.0.
The beneficial effects are that: the preparation process of the hydrophilic modification reagent ensures that the prepared hydrophilic modification reagent has higher quality.
Further, the precursor solution includes an orthosilicate; the inorganic acid solution comprises one of hydrochloric acid, sulfuric acid and oxalic acid; the alkali solution comprises one of sodium hydroxide solution and ammonia water; the surface modifier is R-trialkoxysilane, and R is a hydrophilic group.
The beneficial effects are that: the hydrophilic modification reagent has various choices and is convenient to mix.
Drawings
FIG. 1 is a schematic view of the structure of a gel felt surface treatment apparatus of the present invention;
FIG. 2 is a schematic structural view of a first film coating mechanism of the gel felt surface treatment apparatus of FIG. 1;
FIG. 3 is an enlarged view of a portion of the first film coating mechanism of FIG. 2 at A;
FIG. 4 is a schematic structural view of a second film coating mechanism of the gel felt surface treatment apparatus of FIG. 1;
fig. 5 is another view angle structure schematic diagram of the second film covering mechanism in fig. 4.
Reference numerals: 1-unreeling rollers; 2-a second transfer mechanism; 3-a holding tank; 4-atomizing nozzles; 5-a first conveyor belt; 6, a frame body; 7-a first film covering mechanism; 8-a second film covering mechanism; 9-a fixing plate; 10-supporting a connecting plate; 11-connecting rods; 12-adjusting the screw; 13-a first press roll; 14-film synchronous roller; 15-film pressing rollers; 16-synchronous belt; 17-tensioning wheel; 18-film synchronizing rolls; 19-a second press roll; a 20-U-shaped groove; 21-a nut; 22-a first connecting rod; 23-a second connecting rod; 24-a first cross brace; 25-a second cross brace; 26-film tensioning roller; 27-film tensioning guide shaft; 28-slide bar; 29-tensioning a spring; 30-buffer blocks.
Detailed Description
The gel felt surface treatment apparatus of the present invention is described in further detail below with reference to the attached drawings and detailed description:
as shown in fig. 1, the gel felt surface treatment device of the present invention comprises a spraying mechanism, a first conveying mechanism, a frame 6, a first film coating mechanism 7, a second film coating mechanism 8 and an annular film. Specifically, spray mechanism includes the atomizing nozzle 4 that sets up in the upper and lower both sides of hydrophobicity gel felt, and spray mechanism still includes the holding tank 3 that sets up with atomizing nozzle 4 intercommunication, is provided with the ooff valve of control atomizing nozzle 4 switch between holding tank 3 and the atomizing nozzle 4, holds hydrophilic modification reagent in the holding tank 3. In this embodiment, the switching valve and the atomizing nozzle 4 are both of the prior art, and will not be described herein. The spraying mechanism is used for spraying a hydrophilic modification reagent on the upper surface and the lower surface of the hydrophobic gel felt.
The right side at spraying mechanism is provided with first transport mechanism, and first transport mechanism includes first conveyer belt 5 and drives first conveyer belt 5 driven drive structure, and in this embodiment, drive structure is prior art, as long as can realize first conveyer belt 5's transmission can, specific structure is not repeated here. The first conveyor belt 5 is used to transport the hydrophobic gel felt from left to right.
The frame body 6 is arranged above the first conveyor belt 5, the frame body 6 is supported on the ground, a stand column of the frame body 6 and two first connecting rods 22 and second connecting rods 23 which are fixed at the upper ends of the stand column and extend in the left-right direction are arranged at intervals in the front-back direction, a first transverse strut 24 and a second transverse strut 25 are fixedly arranged between the first connecting rods 22 and the second connecting rods 23, and the left-right intervals of the first transverse strut 24 and the second transverse strut 25 are arranged.
The frame 6 is provided with a first film-coating mechanism 7 and a second film-coating mechanism 8, and the first film-coating mechanism 7 and the second film-coating mechanism 8 are arranged at right and left intervals, in this embodiment, the first film-coating mechanism 7 is arranged on the right side of the second film-coating mechanism 8. Annular films are circularly arranged between the first film covering mechanism 7 and the second film covering mechanism 8, the annular films are respectively pressed and attached to the upper surface of the hydrophobic gel felt by the first film covering mechanism 7 and the second film covering mechanism 8, and the lower surface of the hydrophobic gel felt is attached to the upper surface of the first conveyor belt 5. In the embodiment, the annular membrane is a membrane material with a complete closed loop shape formed by connecting the head and the tail; the annular membrane can be made of one of polyimide film, polyester film, polyurethane film, polypropylene film, polyethylene film or coating cloth. In addition, in the embodiment, the annular membrane is adopted, so that the operation complexity is reduced, the labor capacity and the labor intensity of workers are reduced, the step of frequent membrane replacement is omitted, and the occupied space of membrane materials is reduced.
In this embodiment, the first film coating mechanism 7 is fixed between the first connecting rod 22 and the second connecting rod 23 of the frame body 6 in the front-back direction, specifically, as shown in fig. 2, the first film coating mechanism 7 includes a support frame fixed on the frame body 6, the support frame includes a fixing plate 9 fixed on the frame body 6 and a support connecting plate 10 obliquely arranged relative to the fixing plate 9, a compression adjusting structure for adjusting the inclination angle of the support connecting plate 10 is arranged between the support connecting plate 10 and the fixing plate 9, in this embodiment, as shown in fig. 3, the compression adjusting structure includes a connecting rod 11 and an adjusting screw 12, the connecting rod 11 is fixed on the fixing plate 9, one end of the connecting rod 11 far away from the fixing plate 9 is provided with a round hole for the passing of the adjusting screw 12, the upper side and the lower side of the round hole are provided with nuts 21 in threaded fit with the adjusting screw 12, and the lower end of the adjusting screw 12 is hinged with the support connecting plate 10.
The support frame is rotationally provided with a first press roller 13 and a film synchronizing roller 18 in transmission connection with the first press roller 13, specifically, the first press roller 13 is arranged below the film synchronizing roller 18, the first press roller 13 is rotationally arranged between the front support connecting plate 10 and the rear support connecting plate 10, the film synchronizing roller 18 is rotationally arranged between the front fixing plate 9 and the rear fixing plate 9, the first press roller 13 comprises a film synchronizing roller 14 positioned at the front end and the rear end and a film pressing roller 15 positioned between the two film synchronizing rollers 14, the film synchronizing roller 14 and the film pressing roller 15 are coaxially arranged, the film synchronizing roller 14 is in frictional contact with the first conveyor belt 5 so that the first conveyor belt 5 drives the film synchronizing roller 14 to synchronously rotate, the diameter of the film pressing roller 15 is smaller than that of the film synchronizing roller 14, and a gap between the film pressing roller 15 and the first conveyor belt 5 is used for passing through a hydrophobic gel felt and an annular film when the film synchronizing roller 14 is in contact with the first conveyor belt 5.
The first press roller 13 is in transmission connection with the film synchronous roller 18 through the synchronous belt 16, in order to ensure the tensioning effect of the synchronous belt 16, a tensioning wheel 17 is adjustably arranged on the support connecting plate 10, the tensioning wheel 17 is arranged on the inner ring of the synchronous belt 16, in the embodiment, an adjusting plate is arranged on the support connecting plate 10, an adjusting long hole is formed in the adjusting plate, and the tensioning wheel 17 is adjustably fixed in the adjusting long hole.
In this embodiment, the pressure of the film synchronizing roller 14 against the first conveyor belt 5 is adjusted by adjusting the length of the adjusting screw 12 in the pressing adjusting structure, so that the driving force will be provided for the first film laminating mechanism 7.
The first press roller 13 is provided with: firstly, the power of the first conveyor belt 5 can be transmitted to the first film covering mechanism 7, so that the driving structure of the first film covering mechanism 7 is saved, and compared with the driving mode of an electric appliance for driving the first film covering mechanism 7, the driving mode of the first film covering mechanism 7 in the embodiment has faster speed response and more stable synchronism; secondly, the rotation speed of the first conveyor belt 5 is guaranteed to be the same as that of the first compression roller 13, so that the transmission speeds of the annular membrane and the hydrophobic gel felt are guaranteed to be the same, and abrasion of the annular membrane or abrasion of the hydrophobic gel felt caused by different transmission speeds of the annular membrane and the hydrophobic gel felt are avoided; third, film synchronizing rollers 14 are disposed at front and rear ends of the first press roller 13, a film pressing roller 15 is disposed between the two film synchronizing rollers 14, and a diameter of the film pressing roller 15 is smaller than that of the film synchronizing rollers 14, so that when the film synchronizing rollers 14 are in contact with the first conveyor belt 5, a gap between the film pressing roller 15 and the first conveyor belt 5 is used for the passage of the hydrophobic gel felt and the annular film.
A second press roller 19 is arranged above the film synchronizing roller 18, the second press roller 19 and the film synchronizing roller 18 clamp the annular film together, the second press roller 19 is rotatably supported on the support connecting plate 10, and in the embodiment, a U-shaped groove 20 for rotatably supporting the second press roller 19 is formed in the support connecting plate 10. The provision of the second press roller 19 can increase the friction between the annular film and the film synchronizing roller 18, preventing the annular film and the film synchronizing roller 18 from sliding relatively.
As shown in fig. 4 and 5, the second film laminating mechanism 8 includes a slide seat slidably guided with respect to the first connecting rod 22 and the second connecting rod 23 of the frame body 6, a film tension roller 26 and a film tension guide shaft 27 rotatably provided on the slide seat, and the film tension roller 26 and the film tension guide shaft 27 are disposed at an upper and lower interval. The second film laminating mechanism 8 is disposed between the first cross brace 24 and the second cross brace 25, in this embodiment, the first cross brace 24 is disposed on the right side of the second cross brace 25, a slide bar 28 is fixedly disposed on the slide base, one end of the slide bar 28 is located on the left side of the slide base, the other end of the slide bar 28 is located on the right side of the slide base, a guide hole through which the slide bar 28 passes is formed in the first cross brace 24, the right end of the slide bar 28 passes through the guide hole in the first cross brace 24 in a guiding manner, a tensioning spring 29 is arranged in the slide bar 28 in a penetrating manner, the tensioning spring 29 is disposed between the film tensioning roller 26 and the first cross brace 24, and the tensioning spring 29 tensions the annular film leftwards, so that the annular film is tensioned between the first film laminating mechanism 7 and the second film laminating mechanism 8. The one end towards second stull 25 of slide bar 28 is fixed with buffer block 30, and second stull 25 carries out spacingly to the left movement of second tectorial membrane mechanism 8, and if the annular membrane breaks suddenly, second stull 25's setting carries out spacingly to second tectorial membrane mechanism 8 left movement position, and buffer block 30's setting can cushion the impact when second tectorial membrane mechanism 8 strikes on the second horizontal pole.
In this embodiment, the annular film sequentially bypasses the gap between the first press roller 13, the second press roller 19 and the film synchronizing roller 18, the film tensioning roller 26 and the film tensioning guide shaft 27, and presses the annular film to the first conveyor belt 5 through the first press roller 13 and the film tensioning guide shaft 27, so that the annular film is pressed and attached to the upper surface of the hydrophobic gel felt on the first conveyor belt 5.
In this example, the gel refers to a wet gel or an aerogel obtained by replacing the liquid phase in the wet gel with a gas by a certain drying method.
The gel felt refers to a fiber felt which is composited with gel (comprising wet gel or aerogel obtained by replacing liquid phase in the wet gel with gas in a certain drying mode), and the gel felt comprises an alumina gel felt, a silica gel felt and a titanium oxide gel felt.
The fibrous mat is a sheet-like article made of fibers that are unoriented by chemical bonding or mechanical action, in this embodiment a continuous mat.
The surface treatment modification method of the gel felt comprises the following steps:
s1: the spraying mechanism sprays hydrophilic modifying reagent on the upper surface and the lower surface of the hydrophobic gel felt respectively;
s2: the hydrophobic gel felt sprayed with the hydrophilic modification agent is conveyed by the first conveyor belt 5, and is coated between the first coating mechanism 7 and the second coating mechanism 8, specifically, the coating is an annular film.
The hydrophilic modification reagent is a reagent comprising a surface modifier, and the hydrophilic modification reagent is prepared by the following steps: weighing tetraethoxysilane as a precursor solution, adding a surface modifier and an inorganic acid solution into tetraethoxysilane, uniformly stirring for a period of time, then adding an alkali solution, uniformly stirring for 1-5 min, and adding the tetraethoxysilane and the surface modifier in a molar ratio of 1:0.1-1:0.5; the inorganic acid solution is a strong acid or weak acid solution such as hydrochloric acid, sulfuric acid, oxalic acid and the like, the concentration of the inorganic acid solution is 0.2-1 mol/L, the adding amount of the inorganic acid solution is 4-5 of the pH value of the solution, and the inorganic acid solution is added for hydrolysis and stirring for 30-60 min. The alkali solution is sodium hydroxide solution, ammonia water and the like, the concentration of the alkali solution is 0.5-2 mol/L, the adding amount of the alkali solution is used for adjusting the pH value of the solution to 8.0-9.0, and the pH stirring time is 5-15 min after the alkali solution is added.
The surface modifier is R-trialkoxysilane, and R is a hydrophilic group. May be R-trimethoxysilane, R-triethoxysilane or other trialkoxy hydrophilic surface modifiers. R comprises one or more of aminopropyl, chloropropyl, mercaptopropyl and aminoethyl.
Specifically, the surface modifier may be N- (beta-aminoethyl) -gamma-aminopropyl-triethoxysilane, N- (beta-aminoethyl) -gamma-methyl-aminopropyl-triethoxysilane, gamma-chloropropyl-triethoxysilane, gamma-mercaptopropyl-triethoxysilane, gamma-aminopropyl-triethoxysilane, 3-chloropropyl trichlorosilane, N-beta-aminoethyl-gamma-aminopropyl methyldimethoxysilane, N- (beta-aminoethyl) -gamma-aminopropyl-trimethoxysilane, N- (beta-aminoethyl) -gamma-methyl-aminopropyl-trimethoxysilane, gamma-chloropropyl-triethylmethylsilane, gamma-mercaptopropyl-trimethoxysilane, gamma-aminopropyl-trimethoxysilane, or the like.
In one specific example of the preparation of the hydrophilic modification reagent, 400ml of tetraethoxysilane and 100ml of gamma-aminopropyl-trimethoxysilane are added into a water tank, 60ml of deionized water and 500ml of ethanol are added, the pH is adjusted to 4 by using an HCl solution with the concentration of 0.5mol/L for hydrolysis, the mixture is stirred for 20min, the pH is adjusted to 9 by using an NaOH solution with the concentration of 1mol/L, and the mixture is stirred for 5min, so that the hydrophilic surface modification solution is obtained.
The preparation of the hydrophobic gel felt comprises the steps of dipping the felt body into wet gel felt and then carrying out hydrophobic treatment.
The preparation method of the wet gel felt comprises the following two preparation methods:
the method comprises the following steps: directly mixing an organosilicon source, an alcohol solvent, an acid catalyst, an alkali catalyst and water, and then putting the mixture into a fiber felt to obtain a wet gel felt;
the second method is as follows: mixing an organic silicon source, an alcohol solvent, an acid catalyst and water, and fully hydrolyzing for 1-24 hours to obtain a silicon source hydrolysate; and adding an alkali catalyst into the silicon source hydrolysate, then adding a fiber felt, standing for gelation, and obtaining the wet gel felt.
The gel temperature is 55-70 ℃. The aging solvent is ethanol or methanol solution, the aging temperature is 55-70 ℃, and the aging time is 6-12 h.
The preparation of the hydrophobic gel felt comprises the steps of drying the wet gel felt to obtain the aerogel felt, and then carrying out hydrophobic treatment. The drying method comprises normal pressure drying, and CO 2 Supercritical drying, ethanol supercritical drying, etc.
The organic silicon source is one or more of ethyl orthosilicate, methyl orthosilicate, butyl orthosilicate, isopropyl orthosilicate and alkyl alkoxy silane; the alkyl alkoxy silane comprises one or more of methyl trimethoxy silane, dimethyl dimethoxy silane, methyl triethoxy silane, dimethyl diethoxy silane, vinyl triethoxy silane, propyl trimethoxy silane and propyl triethoxy silane.
The acid catalyst comprises an inorganic acid and/or an organic acid; the inorganic acid preferably comprises one or more of hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, hydrofluoric acid, hypochlorous acid, sulfurous acid and nitrous acid; the organic acid preferably comprises one or more of oxalic acid, acetic acid, oxalic acid, lactic acid, benzoic acid, methanesulfonic acid, acrylic acid and oleic acid.
The base catalyst preferably comprises an inorganic base and/or an organic base. The inorganic base preferably comprises one or more of sodium hydroxide, potassium hydroxide, ammonia water, ammonium fluoride, ammonium bicarbonate, sodium carbonate and sodium bicarbonate; the organic base preferably comprises one or more of ethanolamine, diethanolamine, methylamine, dimethylamine, ethylamine, diethylamine, propylamine, dipropylamine, isopropanolamine, aniline, o-phenylenediamine, m-phenylenediamine, p-phenylenediamine.
The alcohol solvent is one or more of methanol, ethanol, propanol, isopropanol, ethylene glycol, propylene glycol and glycerol.
The gel felt is rendered hydrophobic by means of dipping or spraying (hydrophobizing agent in gas or liquid phase).
The hydrophobizing agent is methyltrimethoxysilane, dimethyldimethoxysilane, trimethylmethoxysilane, tetraethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, trimethylethoxysilane, ethyltrimethoxysilane, diethyldimethoxysilane, triethylmethoxysilane, triethylethoxysilane, diethyldiethoxysilane, ethyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, methylvinyldimethoxysilane, vinyltrichlorosilane, hexamethyldisiloxane, hexamethyldisilazane, heptamethyldisiloxane, heptamethyldisilazane, chloropropyltriethoxysilane, chloropropylmethyldimethoxysilane, dimethoxybis (2-methylpropyl) silane, bistrimethylsiloxymethylsilane, bis (1, 2-methyldichlorosilyl) ethane, bis (1, 2-trichlorosilyl) ethane, bis (1, 2-methyldimethoxysilyl) ethane, bis (1, 2-methyldiethoxysilane), bis (1, 2-trimethoxy) ethane, bis (1, 2-triethoxysilane), trimethylethoxysilane, trichlorosilane, dichlorosilane.
The gel felt surface treatment equipment comprises a spraying mechanism for spraying hydrophilic modifier on the upper surface and the lower surface of a hydrophobic gel felt, wherein after the spraying mechanism sprays the hydrophilic modifier, the first conveying mechanism conveys the hydrophobic gel felt, in the conveying process of the hydrophobic gel felt, an annular film is circularly arranged between the first film coating mechanism 7 and the second film coating mechanism 8 through the first film coating mechanism 7 and the second film coating mechanism 8, the annular film is tightly attached to the upper surface of the hydrophobic gel felt under the action of the top pressure of the first film coating mechanism 7 and the second film coating mechanism 8, the lower surface of the hydrophobic gel felt is tightly attached to the upper surface of the first conveying belt 5, in this way, the hydrophobic gel felt sprayed with the hydrophilic modifier is in non-wetting liquid drops on the upper surface and the lower surface of the hydrophobic gel felt, after the annular membrane is transmitted by the first membrane covering mechanism 7 and the second membrane covering mechanism 8, the annular membrane is tightly attached to the upper surface of the hydrophobic gel felt, and the first conveyor belt 5 is tightly attached to the lower surface of the hydrophobic gel felt, so that the annular membrane and the first conveyor belt 5 can be spread with hydrophilic modifier in a dripping state on the upper surface and the lower surface of the hydrophobic gel felt, homogenization of hydrophilic treatment on the surface of the hydrophobic gel felt is realized, that is, the hydrophilic modifier is ensured to be uniformly spread on the surface of the hydrophobic gel felt, and in addition, the annular membrane is arranged, heat preservation can be carried out after the hydrophilic modifier is sprayed on the surface of the hydrophobic gel felt, so that the hydrophilic modification treatment effect of the surface of the hydrophobic gel felt is ensured, and the problem of powder dropping of the hydrophobic gel felt is avoided.
In the above embodiment, the first film laminating mechanism includes a support frame fixed on the frame body, a first press roller and a film synchronization roller in transmission connection with the first press roller are rotatably arranged on the support frame, the first press roller is arranged at the lower left of the film synchronization roller, the first press roller includes film synchronization rollers positioned at the front end and the rear end and a film pressing roller positioned between the two film synchronization rollers, the film synchronization rollers are in friction contact with the first conveyor belt so that the first conveyor belt drives the film synchronization rollers to rotate synchronously, the diameter of the film pressing roller is smaller than that of the film synchronization rollers, and when the film synchronization rollers are in contact with the first conveyor belt, a gap between the film pressing roller and the first conveyor belt allows the hydrophobic gel felt and the annular film to pass through; in other embodiments, the first film laminating mechanism may further be provided with a driving device separately, where it is required to ensure that the transmission speed of the first film laminating mechanism to the annular film is equal to the transmission speed of the first conveyor belt to the hydrophobic gel felt.
In the above embodiment, a second press roller is arranged above the film synchronization roller, and the second press roller and the film synchronization roller clamp the annular film together; in other embodiments, the second press roll may not be provided.
In the above embodiment, the support frame includes a fixing plate fixed on the frame body and a support connecting plate obliquely arranged relative to the fixing plate, the first press roller is rotatably arranged on the support connecting plate, a compression adjusting structure for adjusting the inclination angle of the support connecting plate is arranged between the support connecting plate and the fixing plate, and the second press roller is rotatably supported on the support connecting plate; in other embodiments, the pressing adjustment structure may not be provided, and an adjustment hole needs to be provided on the support connection board, so that the height of the first pressing roller is adjustable.
In the above embodiment, the first pressing roller is in transmission connection with the film synchronizing roller through a synchronous belt, and the supporting connection plate is adjustably provided with a tensioning wheel which is arranged at an inner ring of the synchronous belt; in other embodiments, the tensioning wheel may not be provided, or the tensioning wheel may be provided on the outer ring of the timing belt.
In the above embodiment, the frame body includes a first cross brace and a second cross brace that are arranged at a left-right interval, the second film covering mechanism is arranged between the first cross brace and the second cross brace, a slide bar is fixedly arranged on the slide seat, one end of the slide bar is guided to pass through the first cross brace, a tensioning spring is arranged on the slide bar in a penetrating way, the tensioning spring is positioned between the film tensioning roller and the first cross brace, and a buffer block is fixed at one end of the slide bar facing the second cross brace; in other embodiments, the sliding rod can be fixed between the first transverse support and the second transverse support, the second film covering mechanism is in guiding sliding fit with the sliding rod, and a tensioning spring is sleeved on the sliding rod between the second film covering mechanism and the first transverse support; alternatively, the buffer block may not be provided.

Claims (5)

1. A gel felt surface treatment apparatus, comprising:
spraying mechanism: the spray nozzle is arranged at the upper side and the lower side of the hydrophobic gel felt and is used for spraying hydrophilic modification reagents on the upper surface and the lower surface of the hydrophobic gel felt;
a first conveying mechanism: comprises a first conveyor belt for conveying a hydrophobic gel felt;
frame body: is arranged above the first conveyor belt;
first tectorial membrane mechanism: is fixed on the frame body;
and a second film covering mechanism: the first film covering mechanism is arranged on the frame body at intervals;
annular membrane: the circulating transmission is arranged between the first film covering mechanism and the second film covering mechanism;
the first film covering mechanism and the second film covering mechanism respectively press and attach the annular film on the upper surface of the hydrophobic gel felt, and the lower surface of the hydrophobic gel felt is attached to the upper surface of the first conveyor belt;
the first film laminating mechanism comprises a support frame fixed on the frame body, a first press roller and a film synchronizing roller in transmission connection with the first press roller are rotationally arranged on the support frame, the first press roller is in transmission connection with the film synchronizing roller through a synchronous belt, the first press roller comprises film synchronizing rollers positioned at the front end and the rear end and a film pressing roller positioned between the two film synchronizing rollers, the film synchronizing rollers are in friction contact with a first conveyor belt so that the first conveyor belt drives the film synchronizing rollers to synchronously rotate, the diameter of the film pressing roller is smaller than that of the film synchronizing rollers, and a gap between the film pressing roller and the first conveyor belt is used for a hydrophobic gel felt and an annular film to pass through when the film synchronizing rollers are in contact with the first conveyor belt;
the second film covering mechanism comprises a sliding seat, a film tensioning roller and a film tensioning guide shaft, wherein the sliding seat is arranged in a guiding sliding manner relative to the frame body, the film tensioning roller and the film tensioning guide shaft are rotatably arranged on the sliding seat, and the film tensioning roller and the film tensioning guide shaft are arranged at intervals up and down;
the frame body comprises a first transverse support and a second transverse support which are arranged at intervals left and right, the second film covering mechanism is arranged between the first transverse support and the second transverse support, a sliding rod is fixedly arranged on the sliding seat, one end of the sliding rod penetrates through the first transverse support in a guiding manner, a tensioning spring is arranged on the sliding rod in a penetrating manner, the tensioning spring is positioned between a film tensioning roller and the first transverse support, and a buffer block is fixed at one end of the sliding rod facing the second transverse support;
a second press roll is arranged above the film synchronous roll, and the second press roll and the film synchronous roll clamp the annular film together;
the support frame comprises a fixed plate fixed on the frame body and a support connecting plate obliquely arranged relative to the fixed plate, the first press roller is rotatably arranged on the support connecting plate, a compaction adjusting structure for adjusting the inclination angle of the support connecting plate is arranged between the support connecting plate and the fixed plate, and the second press roller is rotatably supported on the support connecting plate; the first compression roller is arranged below the side of the film synchronous roller, a tensioning wheel is arranged on the supporting connecting plate in an adjustable mode, and the tensioning wheel is arranged on the inner ring of the synchronous belt.
2. The gel felt surface treatment device according to claim 1, wherein the compaction adjusting structure comprises a connecting rod and an adjusting screw rod which are fixed on the fixed plate, one end of the connecting rod, which is far away from the fixed plate, is provided with a round hole for the adjusting screw rod to pass through, the upper side and the lower side of the round hole are provided with nuts which are in threaded fit with the adjusting screw rod, and the lower end of the adjusting screw rod is hinged with the supporting connecting plate.
3. The method for modifying the surface treatment of a gel felt by a gel felt surface treatment device according to claim 1 or 2, comprising the steps of:
s1: the spraying mechanism sprays hydrophilic modifying reagent on the upper surface and the lower surface of the hydrophobic gel felt respectively;
s2: the hydrophobic gel felt sprayed with the hydrophilic modification reagent is conveyed by a first conveyor belt and is coated between a first coating mechanism and a second coating mechanism.
4. The method for modifying a surface of a gel-mat according to claim 3, wherein the step of preparing a hydrophilic modifying agent comprises: adding a surface modifier and an inorganic acid solution into the precursor solution, uniformly mixing, and then adding an alkali solution; the mol ratio of the precursor solution to the surface modifier is 1:0.1-1:0.5; the concentration of the inorganic acid solution is 0.2-1 mol/L, and the addition amount of the inorganic acid solution is 4-5 when the pH value of the solution is reached; the concentration of the alkali solution is 0.5-2 mol/L, and the addition amount of the alkali solution is to adjust the pH value of the solution to 8.0-9.0.
5. The method of modifying a surface of a gel-mat of claim 4, wherein the precursor solution comprises an orthosilicate; the inorganic acid solution comprises one of hydrochloric acid, sulfuric acid and oxalic acid; the alkali solution comprises one of sodium hydroxide solution and ammonia water; the surface modifier is R-trialkoxysilane, and R is a hydrophilic group.
CN202210465099.7A 2022-04-29 2022-04-29 Gel felt surface treatment equipment and modification method Active CN114771077B (en)

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CN106747265A (en) * 2016-12-27 2017-05-31 广州大学 A kind of aerogel composite and its preparation method based on self assembly opacifier fiber
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CN111535019A (en) * 2020-04-21 2020-08-14 浙江岩谷科技有限公司 Preparation method of hydrophobic glass fiber felt-silica aerogel heat insulation composite material

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Publication number Priority date Publication date Assignee Title
CN106747265A (en) * 2016-12-27 2017-05-31 广州大学 A kind of aerogel composite and its preparation method based on self assembly opacifier fiber
CN107639846A (en) * 2017-09-25 2018-01-30 北京华夏特材科技发展有限公司 A kind of aerogel material surface coating equipment
CN108187965A (en) * 2018-02-11 2018-06-22 刘希文 A kind of conveyer belt type surface pressure overlay film coating process and device
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