WO2019148469A1 - 一种涂布机烘箱、二氧化硅复合绝热材料及其制备方法 - Google Patents

一种涂布机烘箱、二氧化硅复合绝热材料及其制备方法 Download PDF

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WO2019148469A1
WO2019148469A1 PCT/CN2018/075172 CN2018075172W WO2019148469A1 WO 2019148469 A1 WO2019148469 A1 WO 2019148469A1 CN 2018075172 W CN2018075172 W CN 2018075172W WO 2019148469 A1 WO2019148469 A1 WO 2019148469A1
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silica
thermal insulation
layer
binder
heat insulating
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PCT/CN2018/075172
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English (en)
French (fr)
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余玉英
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深圳前海优容科技有限公司
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Publication of WO2019148469A1 publication Critical patent/WO2019148469A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/06—Coating with compositions not containing macromolecular substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances

Definitions

  • the invention relates to the field of thermal insulation materials, in particular to a coater oven, a silica composite thermal insulation material and a preparation method thereof.
  • Silica is widely used as an insulating material in industrial production. However, due to the brittle texture of silica itself, it is easy to crack or fall off during use. In the prior art, silica insulating sheets made of silica are also used. It is brittle, the overall strength is poor, and it is easy to break during use, which seriously affects the reliability of the adiabatic process. Moreover, for the irregular shape structure, it is necessary to separately manufacture the mold to produce the heat insulating sheet, and the production cost is high.
  • the invention provides a coater oven, a silica composite heat insulating material and a preparation method thereof, which can solve the problem that the silicon dioxide heat insulating material is easy to be transmitted and fractured, the heat insulation reliability is poor, and the application object is not flexible enough.
  • a technical solution adopted by the present invention is: a method for preparing a silica composite thermal insulation material.
  • the method includes,
  • the silica thermal insulation layer slurry comprises porous Silica, binder and water.
  • a technical solution adopted by the present invention is: a method for preparing a silica composite thermal insulation material.
  • the method includes:
  • the silicon dioxide film is peeled off from the metal substrate and composited on the soft substrate layer with a binder to obtain the silica composite heat insulating material.
  • one technical solution adopted by the present invention is: a silica composite thermal insulation material.
  • thermoelectric material comprises
  • a technical solution adopted by the present invention is: a method for preparing a silica composite thermal insulation material.
  • the first soft base layer and the second soft base layer are respectively combined on both sides of the silica dry powder sheet to obtain the silica heat insulating material.
  • one technical solution adopted by the present invention is: a silica composite thermal insulation material.
  • thermoelectric material comprises
  • the first soft substrate layer and the second soft substrate layer are respectively laminated on both sides of the silica dry powder sheet layer.
  • one technical solution adopted by the present invention is: a coater oven.
  • the heat insulating layer of the coater oven is prepared by using any of the silica composite heat insulating materials.
  • the present invention coats the silica having the heat insulating effect on the soft base layer, and removes the binder between the porous silica particles and the porous silica pores in the silica heat insulating layer slurry.
  • the pores in the pores of the porous silica itself and the pores between the porous silica particles are filled with air to have a good heat insulating effect; and the substrate carrying the silica insulating layer is a soft base layer, so that the prepared dioxide is oxidized.
  • the silicon composite insulation material is soft, which effectively reduces the risk of breakage during use and makes the adiabatic process more reliable.
  • the soft material can provide a heat insulation layer for different shapes of structures by winding, which is convenient and applicable. wide.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for preparing a silica composite thermal insulation material according to the present invention
  • FIG. 2 is a schematic flow chart of an embodiment of step S200 in FIG. 1;
  • FIG. 3 is a schematic flow chart of another embodiment of a method for preparing a silica composite thermal insulation material according to the present invention.
  • FIG. 4 is a schematic structural view of an embodiment of a silica composite thermal insulation material according to the present invention.
  • FIG. 5 is a schematic flow chart of another embodiment of a method for preparing a silica composite thermal insulation material according to the present invention.
  • FIG. 6 is a schematic structural view of another embodiment of a silica composite thermal insulation material according to the present invention.
  • Figure 7 is a schematic view showing the structure of an embodiment of a coater oven of the present invention.
  • a plurality is at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “comprises” and “comprising” and “comprising” are intended to cover a non-exclusive inclusion.
  • a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or alternatively Other steps or units inherent to these processes, methods, products or equipment.
  • references to "an embodiment” herein mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention.
  • the appearances of the phrases in various places in the specification are not necessarily referring to the same embodiments, and are not exclusive or alternative embodiments that are mutually exclusive. Those skilled in the art will understand and implicitly understand that the embodiments described herein can be combined with other embodiments.
  • FIG. 1 is a schematic flow chart of an embodiment of a method for preparing a silica composite thermal insulation material according to the present invention, the method comprising:
  • a soft base layer is provided as a base layer of the silica composite heat insulating material to support the coating layer coated thereon.
  • the soft base layer makes the obtained silica composite heat insulating material soft, and the prior art hard silica composite heat insulating material is converted into a flexible silicon composite heat insulating material, thereby effectively avoiding
  • the problem of brittle cracking of the prior art hard silica composite heat insulating sheet during use also facilitates providing a heat insulating layer for objects of different shapes to be processed by winding.
  • the soft substrate layer is one or a composite of a polyethylene film, a polypropylene film, a polyterephthalic acid film, or a polymethyl methacrylate film. These films are corrosion resistant, have good strength, and are not susceptible to breakage or breakage during use, and are safe and reliable.
  • the soft base layer can be selected according to the characteristics of the heat insulating environment and the price of the soft base layer, thereby obtaining a more targeted and lower cost product.
  • FIG. 2 is a schematic flow chart of an embodiment of the step S200 of FIG. 1 , the method includes:
  • the porous silica and the binder are mixed with water, and stirred uniformly by mechanical stirring to obtain the silica heat insulating layer slurry.
  • the binder enters a void of the porous silica itself and a void between the porous silica, so that the prepared dioxide is
  • the silicon insulation layer paste has a viscosity and can be bonded to the soft substrate layer.
  • the porous silica may be porous silica having a large specific surface area such as fumed silica or ultrafine silica. On the one hand, the pores of the porous silica can accommodate more air to make raw materials. Silica itself has good thermal insulation properties.
  • a porous silica having a small particle size can increase the number of the porous silica particles accommodated in a unit space, and correspondingly, between the plurality of porous silica particles formed The gap is used to accommodate more air, further enhancing the thermal insulation properties of the prepared silica thermal insulation material.
  • pore increase its specific surface area increases, thus, in one embodiment, a specific surface area of the porous silica is 100-1000m 2 / g, such as 100m 2 / g, 300m 2 / g, 600 m 2 /g, 900 m 2 /g or 1000 m 2 /g.
  • the mass ratio of porous silica, binder to water is 1: (0.1-1): 3-10, and the amount of different binders is selected for the characteristics of different binders;
  • the agent is a low molecular weight binder, and the low molecular weight binder is one or more of methyl methacrylate, vinylidene fluoride or hexafluoropropylene. These low molecular weight binders are easily dissolved by an organic solvent, and are convenient. Removal and degradation.
  • the amount of water is determined according to the required thermal insulation properties of the silica thermal insulation material, and as the amount of water increases, the content of the porous silica in the silica insulating layer slurry of the same thickness is lowered, and the heat insulating property is lowered.
  • the silica thermal insulation layer slurry may be coated on the soft base layer or the metal substrate and stabilized for a period of time to obtain a silica adiabatic precoat layer.
  • the silica thermal insulation layer slurry is directly coated on the soft substrate layer and stabilized for 5-30 s, such as 10 s, 20 s, 30 s; due to the silica thermal insulation layer slurry Directly coated on the soft substrate layer, the recombination with the soft substrate is simultaneously completed during the coating process.
  • the coating thickness of the silica thermal insulation layer slurry has a great influence on the performance of the prepared silicon dioxide thermal insulation material, and the coating thickness of the silica thermal insulation layer slurry is too small, and is prepared.
  • the thermal insulation property of the silica thermal insulation material is poor, and the thickness of the silicon dioxide thermal insulation material to be wound is increased to achieve the same thermal insulation effect; and the coating thickness of the silica thermal insulation layer slurry is too large,
  • the prepared silicon dioxide thermal insulation material is peeled off during the process of bending and winding, and the product quality is unstable. Therefore, in one embodiment, the coating thickness of the silica thermal insulation layer is from 1 ⁇ m to 10 mm, such as 1 ⁇ m, 50 ⁇ m, 1 mm, 5 mm, 10 mm.
  • the silica thermal insulation layer slurry includes porous silica, binder and water.
  • the binder in the porous silica particles and the porous silica pores in the silica thermal insulation layer slurry is removed, and the porous silica in the silica thermal insulation layer slurry
  • the interparticle and porous silica channels contain air, and the silica composite thermal insulation material is obtained due to poor thermal conductivity of air.
  • a method of removing the binder between the porous silica particles and the porous silica pores in the silica heat insulating layer slurry includes a solvent method and a baking method.
  • the silica thermal insulation layer slurry is directly coated on the soft substrate layer, and then the solvent may be coated on the silica thermal insulation precoat layer to make the
  • the silica composite heat insulating material is obtained in such a manner that the binder in the porous silica particles and the porous silica pores are dissolved and volatilized in the silica heat insulating layer slurry.
  • the solvent is one or more of carbon tetrachloride, acetone, diethyl ether or toluene. These solvents have good solubility properties, especially for low molecular organic solvents such as methyl methacrylate, vinylidene fluoride or hexafluoropropylene.
  • a polar solvent is used for the polar binder to dissolve, and for a non-polar binder, a non-polar solvent is used for dissolution, a better dissolution effect can be obtained, and the second is quickly removed.
  • FIG. 3 is a schematic flow chart of another embodiment of a method for preparing a silica composite thermal insulation material according to the present invention, and the specific steps thereof include:
  • the silicon dioxide thermal insulation layer may be composited onto the soft base layer by a subsequent process;
  • the metal substrate may be a stainless steel substrate to facilitate stripping of the silicon dioxide heat insulating layer in a subsequent process.
  • the silica thermal insulation layer slurry is coated on the metal substrate by spraying, knife coating or roll coating.
  • the coating thickness of the silica thermal insulation layer slurry has a great influence on the performance of the prepared silicon dioxide thermal insulation material, and the coating thickness of the silica thermal insulation layer slurry is too small, and the prepared The silica thermal insulation material has poor thermal insulation performance, and the thickness of the silicon dioxide thermal insulation material to be wound is increased to achieve the same thermal insulation effect; and the coating thickness of the silica thermal insulation layer slurry is too large, which may cause The prepared silica thermal insulation material peels off during the process of bending and winding, and the product quality is unstable. Therefore, in one embodiment, the coating thickness of the silica thermal insulation layer is from 1 ⁇ m to 10 mm, such as 1 ⁇ m, 50 ⁇ m, 1 mm, 5 mm, 10 mm.
  • the low molecular binder is an organic binder, it can be converted into gaseous carbon oxides, gaseous nitrogen oxides or gaseous sulfur oxides by baking, and at the same time,
  • the porous silica has good heat resistance, and the structure of the porous silica can be prevented from being destroyed during the combustion of the organic solvent by controlling the calcination temperature.
  • the predetermined temperature is from 400 °C to 700 °C, such as 400 °C, 500 °C, 600 °C, or 700 °C.
  • the silicon dioxide film and the metal substrate after baking are brought to room temperature, and the silicon dioxide film is peeled off from the metal substrate.
  • the silicon dioxide film is a sheet material composed of the porous silica array, and the heat insulating effect is good because the pores of the porous silica particles and the pores of the porous silica contain a large amount of air.
  • the composite material of the silica composite thermal insulation material is also a flexible material, which can effectively avoid the use of the prior art hard silica composite thermal insulation board during use. The problem of brittleness in the middle also facilitates the provision of a heat insulating layer for structures of different shapes by winding.
  • FIG. 4 is a schematic structural diagram of an embodiment of a silicon dioxide composite thermal insulation material according to the present invention, wherein the thermal insulation material comprises:
  • a soft base layer 100 a soft base layer 100; a silica heat insulating layer 200 laminated on the base layer 100.
  • the soft substrate layer 100 serves as a base layer of the silica composite heat insulating material to support the coating layer coated thereon.
  • the soft base layer 100 makes the obtained silica composite heat insulating material soft, and converts the prior art hard silica composite heat insulating sheet into a flexible silica composite heat insulating material, which is effective.
  • the problem of brittle cracking of the prior art hard silica composite heat insulating sheet during use is avoided, and it is also convenient to provide a heat insulating layer for the structure of different shapes by winding.
  • the flexible substrate layer 100 is one or a composite of a polyethylene film, a polypropylene film, a polyterephthalic acid film, or a polymethyl methacrylate film. These films are corrosion-resistant, strong, and are not susceptible to breakage or breakage during use, and are safe and reliable.
  • the soft base layer 100 can be selected according to the characteristics of the heat insulating environment and the price of the soft base layer, thereby obtaining a more targeted and lower cost product.
  • the silica thermal insulation layer 200 composited on the base layer 100 includes a plurality of porous silica particles 210 each having a plurality of cells 211 in which air is contained, due to heat insulation of the air.
  • the properties of the porous silica particles 210 are also excellent.
  • a gap 220 is formed between the plurality of porous silica particles 210, and the gap 220 also accommodates air to function as a heat insulating. Therefore, the silicon dioxide heat insulating material has better heat insulating properties.
  • the silica is porous silica having a specific surface area greater than 500 m 2 /g. This is because as the particle size decreases, the number of pores increases and the specific surface area increases.
  • the porous silica having a large specific surface area can be selected on the one hand to accommodate more air in the pores of the porous silica, so that the porous silica itself has better heat insulating properties.
  • the porous silica having a small particle size can increase the number of the porous silica particles accommodated in a unit space, and accordingly, it is possible to obtain more different gaps of the porous silica particles. To accommodate more air, further improving the thermal insulation properties of the prepared silica thermal insulation material.
  • a specific surface area of the porous silica is 100-1000m 2 / g, such as 100m 2 / g, 300m 2 / g, 600m 2 / g, 900m 2 / g or 1000m 2 / g . .
  • the silica thermal insulation layer has a thickness of from 1 ⁇ m to 10 mm. This is because the thickness of the silica thermal insulation layer has a large influence on the performance of the silica thermal insulation material, the thickness of the silica thermal insulation layer is too small, and the thermal insulation property of the silica thermal insulation material is poor. Reaching the same thermal insulation effect requires an increase in the thickness of the entangled silica thermal insulation material; and the excessive thickness of the silica thermal insulation layer causes the silica thermal insulation material to fall off during the bending and winding process. The product quality is unstable. Thus, in one embodiment, the silica insulation layer has a thickness of from 1 ⁇ m to 10 mm, such as 1 ⁇ m, 50 ⁇ m, 1 mm, 5 mm, 10 mm.
  • FIG. 5 is a schematic flow chart of another embodiment of a method for preparing a silica composite thermal insulation material according to the present invention.
  • the silica dry powder flakes are prepared by pressurizing the dry silica powder into a predetermined size of the silica dry powder flakes by pressurization.
  • the preset size includes the length, width and thickness of the silica dry powder sheet set according to actual needs.
  • the first soft base layer and the second soft base layer are respectively combined on both sides of the silica dry powder sheet to obtain the silica heat insulating material.
  • the first soft substrate layer is one or a composite of a polyethylene film, a polypropylene film, a polyphthalic acid film or a polymethyl methacrylate film;
  • the second soft The base layer is one or a composite of a polyethylene film, a polypropylene film, a polyphthalic acid film or a polymethyl methacrylate film.
  • the first soft substrate layer and the second soft substrate layer are composited on both sides of the silica dry powder sheet by an adhesive.
  • the binder is a low molecular binder, and the low molecular binder is one or more of methyl methacrylate, vinylidene fluoride or hexafluoropropylene.
  • FIG. 6 is a schematic structural view of another embodiment of a silica composite thermal insulation material according to the present invention.
  • the heat insulating material comprises a silica dry powder flake layer 30; the silica dry powder flake layer 30 is formed by extruding silica particles 31.
  • the first soft base layer 10 and the second soft base layer 20 are respectively laminated on both sides of the silica dry powder sheet 30.
  • the silica dry powder sheet 30 has a thickness of from 1 ⁇ m to 10 mm.
  • the present invention also discloses a coater oven, please refer to FIG. 7, wherein the heat insulating layer of the coater oven 1 adopts the silica composite heat insulating material mentioned in the foregoing embodiments. preparation.
  • the silica composite thermal insulation material can be wound around a structure that needs to be insulated, such as a duct, an oven wall, and the like, especially for an irregular shape structure, which is not only safe and reliable, but also easy to operate.
  • the present invention provides a coater oven, a silica composite thermal insulation material, and a preparation method thereof, the method comprising: providing a soft base layer; and coating the pre-formed silica thermal insulation slurry On the soft substrate layer, a silica adiabatic precoat layer is obtained; and the binder in the porous silica particles and the porous silica pores in the silica heat insulating layer slurry is removed to obtain the second Silicon oxide composite insulation material.
  • the present invention enables the porous silica itself to be in the pores and the porous silica particles by removing the binder between the porous silica particles and the porous silica pores in the silica heat insulating layer slurry.
  • the interstitial space is filled with air for better thermal insulation; and the substrate carrying the silica thermal insulation layer is a soft base layer, which makes the prepared silica composite thermal insulation material softer and effectively reduces the breakage during use. The risk makes the adiabatic process more reliable.
  • the soft material can provide a thermal insulation layer for different shapes of structures by winding, which is not only easy to operate but also has a wide application range.

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Abstract

一种二氧化硅复合绝热材料的制备方法，包括：提供软性基底层(S100)；将预制的二氧化硅绝热层浆料涂覆在软性基底层上，得到二氧化硅绝热预涂层(S200)；除去二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到二氧化硅复合绝热材料；二氧化硅绝热层浆料包括多孔二氧化硅、粘结剂与水(S300)。一种二氧化硅复合绝热材料，包括:软性基底层；复合在软性基底层上的二氧化硅绝热层。一种涂布机烘箱，该涂布机烘箱的保温层采用该二氧化硅复合绝热材料制备。

Description

一种涂布机烘箱、二氧化硅复合绝热材料及其制备方法 【技术领域】
本发明涉及绝热材料领域，尤其涉及一种涂布机烘箱、二氧化硅复合绝热材料及其制备方法。
【背景技术】
二氧化硅作为绝热材料广泛应用在工业生产中，但因二氧化硅本身质地较脆，容易在使用过程中发生破裂或脱落，而现有技术中由二氧化硅制造的二氧化硅绝热板材也较脆，整体强度较差，在使用过程中容易发生断裂，严重影响绝热过程的可靠性；且对形状不规则的结构需要单独制造模具生产绝热板材，生产成本高。
【发明内容】
本发明提供一种涂布机烘箱、二氧化硅复合绝热材料及其制备方法，能够解决现有技术中二氧化硅绝热材料容易发送断裂，绝热可靠性差，且应用对象不够灵活的问题。
为解决上述技术方案，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料的制备方法。
所述方法包括，
提供软性基底层；
将预制的二氧化硅绝热层浆料涂覆在所述软性基底层上，得到二氧化硅绝热预涂层；
除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到所述二氧化硅复合绝热材料；所述二氧化硅绝热层浆料包括多孔二氧化硅、粘结剂与水。
为解决上述技术方案，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料的制备方法。
所述方法包括：
提供金属基板；
将预制的二氧化硅绝热层浆料涂覆在所述金属基板上，得到二氧化硅绝热预涂层；
去除所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到二氧化硅膜片；
将所述二氧化硅膜片从所述金属基板上剥离，并用粘结剂复合在所述软性基底层上，得到所述二氧化硅复合绝热材料。
为解决上述技术方案，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料。
其中，所述绝热材料包括，
软性基底层；
复合在所述基底层上的二氧化硅绝热层。
为解决上述技术方案，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料的制备方法。
提供挤压成型的二氧化硅干粉薄片；
在所述二氧化硅干粉薄片两侧分别复合第一软性基底层和第二软性基底层，得到所述二氧化硅绝热材料。
为解决上述技术方案，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料。
其中，所述绝热材料包括，
二氧化硅干粉薄片层；
第一软性基底层和第二软性基底层，分别复合在所述二氧化硅干粉薄片层两侧。
为解决上述技术方案，本发明采用的一种技术方案是：一种涂布机烘箱。
其中，所述涂布机烘箱的保温层采用任一所述的二氧化硅复合绝热材料制 备。
有益效果：本发明将具有绝热作用的二氧化硅涂覆在软性基底层上，并除去二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂能够使多孔二氧化硅自身的孔道内及多孔二氧化硅颗粒之间的空隙中充满空气起到较好的绝热效果；而承载二氧化硅绝热层的基底为软性基底层，使制备的二氧化硅复合绝热材料较为柔软，有效降低了在使用过程中断裂的风险，使绝热过程更加可靠；同时，软性材料能能够通过缠绕的方式给不同形状的结构提供绝热层，不仅操作方便且应用范围广。
【附图说明】
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明一种二氧化硅复合绝热材料的制备方法一实施例的流程示意图；
图2是图1中所述步骤S200一实施例的流程示意图；
图3是本发明一种二氧化硅复合绝热材料的制备方法另一实施例的流程示意图；
图4是本发明一种二氧化硅复合绝热材料一实施例的结构示意图；
图5是本发明一种二氧化硅复合绝热材料的制备方法另一实施例的流程示意图；
图6是本发明一种二氧化硅复合绝热材料另一实施例的结构示意图；
图7是本发明一种涂布机烘箱一实施例的结构示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本发明的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
下面结合实施例对本发明进行详细的说明。
请参考图1，图1是本发明一种二氧化硅复合绝热材料的制备方法一实施例的流程示意图，所述方法包括：
S100、提供软性基底层；
在所述步骤S100中，提供软性基底层作为所述二氧化硅复合绝热材料的基底层，对涂覆在其上的涂层起到支撑作用。同时，所述软性基底层使得到的所述二氧化硅复合绝热材料也是软性的，将现有技术中的硬质二氧化硅复合绝热板材转变为柔性二氧化硅复合绝热材料，有效避免了现有技术中的硬质二氧化硅复合绝热板材在使用过程中的脆裂问题，也便于通过缠绕的方式为不同形状的待处理对象提供绝热层。
在一个实施例中，所述软性基底层为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中一种或复合。这些薄膜耐腐蚀、强度好， 在使用过程中不易发生断裂或破损，安全可靠。当然，所述软性基底层可以根据绝热环境的特点及所述软性基底层的价格进行选择，获得针对性更强、成本更低的产品。
S200、将预制的二氧化硅绝热层浆料涂覆在所述软性基底层上，得到二氧化硅绝热预涂层；
在所述步骤S200中，将预制的二氧化硅绝热层浆料涂覆在所述软性基底层上，得到二氧化硅绝热预涂层，所述氧化硅绝热预涂层为制备所述二氧化硅绝热材料的中间体，具体的，请参考图2，图2是图1中所述步骤S200一实施例的流程示意图，所述方法包括：
S210、将多孔二氧化硅、粘结剂与水混合均匀制备二氧化硅绝热层浆料。
在所述步骤S210中，将多孔二氧化硅、粘结剂与水混合，采用机械搅拌的方式搅拌均匀，得到所述二氧化硅绝热层浆料。在多孔二氧化硅、粘结剂与水混合的过程中，所述粘结剂进入所述多孔二氧化硅自身的空隙及所述多孔二氧化硅之间的空隙，使制备的所述二氧化硅绝热层浆料具有粘性，可以粘接在所述软性基底层上。所述多孔二氧化硅可以为气相二氧化硅或超细二氧化硅等比表面积较大的多孔二氧化硅，一方面，所述多孔二氧化硅的孔道中可以容纳更多的空气，使原料二氧化硅自身具有较好的绝热性能。另一方面，选择颗粒尺寸较小的多孔二氧化硅能够增大单位空间容纳的所述多孔二氧化硅颗粒的个数，相应的，形成的更多个所述多孔二氧化硅颗粒之间的间隙用来容纳更多的空气，进一步提高制备的所述二氧化硅绝热材料的绝热性能。随着颗粒尺寸的减小，孔道的增多，其比表面积增大，因此，在一个实施例中，所述多孔二氧化硅的比表面积为100-1000m 2/g，如100m 2/g、300m 2/g、600m 2/g、900m 2/g或1000m 2/g。此外，多孔二氧化硅、粘结剂与水的质量比为1：(0.1-1)：3-10，针对不同的粘结剂的特点，选择不同的粘结剂的用量；所述粘结剂为低分子粘结剂，所述低分子粘结剂为甲基丙烯酸甲酯，偏氟乙烯或六氟丙烯中的一种或多种，这些低分子粘结剂易被有机溶剂溶解，便于去除及降解。根据需要的二氧 化硅绝热材料的绝热性能确定水的用量，且随着水量增加，相同厚度的所述二氧化硅绝热层浆料中所述多孔二氧化硅的含量降低，绝热性能降低。
S220、将所述二氧化硅绝热层浆料涂覆在所述软性基底层上并稳定预设时长，得到二氧化硅绝热预涂层。
在所述步骤S220中，可以将所述二氧化硅绝热层浆料涂覆在所述软性基底层或金属基板上并稳定一段时间，得到二氧化硅绝热预涂层。在一个实施例中，将所述二氧化硅绝热层浆料直接涂覆在所述软性基底层上并稳定5-30s，如10s、20s、30s；由于所述二氧化硅绝热层浆料直接涂覆在所述软性基底层上，在涂覆的过程中同时完成了与所述软性基层的复合。进一步的，所述二氧化硅绝热层浆料的涂覆厚度对制备的所述二氧化硅绝热材料的性能有较大影响，所述二氧化硅绝热层浆料的涂覆厚度过小，制备的所述二氧化硅绝热材料的绝热性能差，达到相同的绝热效果需要缠绕的所述二氧化硅绝热材料的厚度增加；而所述二氧化硅绝热层浆料的涂覆厚度过大，会使制备的所述二氧化硅绝热材料在弯折缠绕的过程中发生脱落，产品质量不稳定。因此，在一个实施例中，所述二氧化硅绝热层浆料的涂覆厚度为1μm-10mm，如1μm、50μm、1mm、5mm、10mm。
S300、除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到所述二氧化硅复合绝热材料；所述二氧化硅绝热层浆料包括多孔二氧化硅、粘结剂与水。
在所述步骤S300中，除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内容纳空气，由于空气的导热性能差，就得到所述二氧化硅复合绝热材料。具体的，除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间的及多孔二氧化硅孔道内的粘结剂的方法包括溶剂法和焙烧法。在一个实施例中，所述二氧化硅绝热层浆料直接涂覆在所述软性基底层上，则可以通过将溶剂涂覆在所述二氧化硅绝热预涂层上，以使所述二氧化硅绝热层浆料中 多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂溶解并挥发的方式得到所述二氧化硅复合绝热材料。进一步的，所述溶剂为四氯化碳，丙酮，乙醚或甲苯中的一种或多种。这些溶剂的溶解性能较好，尤其是对于甲基丙烯酸甲酯，偏氟乙烯或六氟丙烯等低分子有机溶剂的溶解性能更好。当然，根据相似相容原理，对于极性粘结剂采用极性溶剂进行溶解，对于非极性粘结剂，采用非极性溶剂进行溶解，能够获得更好的溶解效果，快速除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂。
在另一个示例中，请参考图3，图3是本发明一种二氧化硅复合绝热材料的制备方法另一实施例的流程示意图，其具体步骤包括：
S10、提供金属基板；
S20、将预制的二氧化硅绝热层浆料涂覆在所述金属基板上，得到二氧化硅绝热预涂层；
在所述步骤S20中，由于所述二氧化硅绝热层浆料涂覆在金属基板上，可以通过后续工艺将所述二氧化硅绝热层复合到所述软性基底层上；具体的，所述金属基板可以是不锈钢基板，便于在后续工艺中将所述二氧化硅绝热层剥离。进一步的，采用喷涂、刮涂或辊涂的方式将所述二氧化硅绝热层浆料涂布在所述金属基板上。显然，所述二氧化硅绝热层浆料的涂覆厚度对制备的所述二氧化硅绝热材料的性能有较大影响，所述二氧化硅绝热层浆料的涂覆厚度过小，制备的所述二氧化硅绝热材料的绝热性能差，达到相同的绝热效果需要缠绕的所述二氧化硅绝热材料的厚度增加；而所述二氧化硅绝热层浆料的涂覆厚度过大，会使制备的所述二氧化硅绝热材料在弯折缠绕的过程中发生脱落，产品质量不稳定。因此，在一个实施例中，所述二氧化硅绝热层浆料的涂覆厚度为1μm-10mm，如1μm、50μm、1mm、5mm、10mm。
S30、去除所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到二氧化硅膜片；
在所述步骤S30中，由于所述低分子粘结剂为有机粘结剂，可以通过焙烧 的方式将其转化为气态碳氧化物、气态氮氧化物或气态硫氧化物等除去；同时，所述多孔二氧化硅的耐热性好，可以通过控制焙烧温度，使所述有机溶剂燃烧的过程中，所述多孔二氧化硅的结构不被破坏。在一个实施例中，所述预设温度为400℃-700℃，如400℃、500℃、600℃或700℃。采用焙烧的方式除去粘结剂避免了溶剂的使用，不仅安全环保，也有利于降低生产成本。
S40、将所述二氧化硅膜片从所述金属基板上剥离，并用粘结剂复合在所述软性基底层上，得到所述二氧化硅复合绝热材料。
在所述步骤S40中，将焙烧后的所述二氧化硅膜片和所述金属基板将至室温，并将所述二氧化硅膜片从所述金属基板上剥离。所述二氧化硅膜片是所述多孔二氧化硅排列组成的片层材料，由于多孔二氧化硅颗粒间隙及所述多孔二氧化硅的孔道内容纳了较多空气，绝热效果好，将其通过粘结剂复合在所述软性基底层上，相应得到所述二氧化硅复合绝热材料也为柔性材料，这样能够有效避免了现有技术中的硬质二氧化硅复合绝热板材在使用过程中的脆裂问题，也便于通过缠绕的方式为不同形状的结构体提供绝热层。
为解决上述问题，本发明还公开了一种二氧化硅复合绝热材料。具体的，请参考图4，图4是本发明一种二氧化硅复合绝热材料一实施例的结构示意图，其中，所述绝热材料包括:
软性基底层100；复合在所述基底层100上的二氧化硅绝热层200。
所述软性基底层100作为所述二氧化硅复合绝热材料的基底层，对涂覆在其上的涂层起到支撑作用。同时，所述软性基底层100使得到的所述二氧化硅复合绝热材料也是软性的，将现有技术中的硬质二氧化硅复合绝热板材转变为柔性二氧化硅复合绝热材料，有效避免了现有技术中的硬质二氧化硅复合绝热板材在使用过程中的脆裂问题，也便于通过缠绕的方式为不同形状的结构体提供绝热层。
在一个实施例中，所述软性基底层100为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合。这些薄膜耐腐蚀、强 度好，在使用过程中不易发生断裂或破损，安全可靠。当然，所述软性基底层100可以根据绝热环境的特点及所述软性基底层的价格进行选择，获得针对性更强、成本更低的产品。
复合在所述基底层100上的二氧化硅绝热层200包括多个多孔二氧化硅颗粒210，每个所述多孔二氧化硅颗粒210具有多个孔道211，其中容纳了空气，由于空气的绝热性好，使所述多孔二氧化硅颗粒210的绝热性也好。同时，多个所述多孔二氧化硅颗粒210之间形成了间隙220，所述间隙220也容纳了空气可以起到绝热的作用，因此，所述二氧化硅绝热材料的绝热性能较好。
在一个实施例中，所述二氧化硅为多孔二氧化硅，比表面积大于500m 2/g。这是因为，随着颗粒尺寸的减小，孔道的增多，其比表面积增大。选择比表面积大的所述多孔二氧化硅一方面能够在所述多孔二氧化硅的孔道中可以容纳更多的空气，使多孔二氧化硅自身具有较好的绝热性能。另一方面，颗粒尺寸较小的多孔二氧化硅能够增大单位空间容纳的所述多孔二氧化硅颗粒的个数，相应的，能够获得更多个不同的所述多孔二氧化硅颗粒间隙用来容纳更多的空气，进一步提高制备的所述二氧化硅绝热材料的绝热性能。因此，在一个实施例中，所述多孔二氧化硅的比表面积为100-1000m 2/g，如100m 2/g、300m 2/g、600m 2/g、900m 2/g或1000m 2/g。。
在一个实施例中，所述二氧化硅绝热层的厚度为1μm-10mm。这是因为，所述二氧化硅绝热层的厚度对所述二氧化硅绝热材料的性能有较大影响，所述二氧化硅绝热层厚度过小，所述二氧化硅绝热材料的绝热性能差，达到相同的绝热效果需要缠绕的所述二氧化硅绝热材料的厚度增加；而所述二氧化硅绝热层厚度过大，会使所述二氧化硅绝热材料在弯折缠绕的过程中发生脱落，产品质量不稳定。因此，在一个实施例中，所述二氧化硅绝热层厚度为1μm-10mm，如1μm、50μm、1mm、5mm、10mm。
为解决上述技术问题，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料的制备方法。请参考图5，图5是本发明一种二氧化硅复合绝热材料的 制备方法另一实施例的流程示意图；
S1、提供挤压成型的二氧化硅干粉薄片；
在所述步骤其S1中，所述二氧化硅干粉薄片的制备方法为，通过加压的方式将二氧化硅干粉挤压成预设尺寸的二氧化硅干粉薄片。所述预设尺寸包括根据实际需要设置的所述二氧化硅干粉薄片的长度、宽度和厚度。
S2、在所述二氧化硅干粉薄片两侧分别复合第一软性基底层和第二软性基底层，得到所述二氧化硅绝热材料。
在所述步骤S2中，所述第一软性基底层为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合；所述第二软性基底层为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合。在一个实施例中，通过粘结剂将所述第一软性基底层和所述第二软性基底层复合在所述二氧化硅干粉薄片两侧。进一步的，所述粘结剂为低分子粘结剂，所述低分子粘结剂为甲基丙烯酸甲酯，偏氟乙烯或六氟丙烯中的一种或多种。采用本实施的制备方法，减少了有机溶剂的用量，不仅降低了成本且更加安全环保。
为解决上述技术方案，本发明采用的一种技术方案是：一种二氧化硅复合绝热材料。请参考图6，图6是本发明一种二氧化硅复合绝热材料另一实施例的结构示意图。其中，所述绝热材料包括，二氧化硅干粉薄片层30；所述二氧化硅干粉薄片层30为二氧化硅颗粒31经挤压形成的。第一软性基底层10和第二软性基底层20，分别复合在所述二氧化硅干粉薄片30的两侧。在一个实施例中，所述二氧化硅干粉薄片30的厚度为1μm-10mm。
为解决上述技术问题，本发明还公开了一种涂布机烘箱，请参考图7，其中，所述涂布机烘箱1的保温层采用前文各实施例所提及的二氧化硅复合绝热材料制备。所述二氧化硅复合绝热材料可以缠绕在风管、烘箱壁等需要进行绝热的结构上，尤其是对于形状不规则的结构，不仅安全可靠且操作方便。
综上所述，本发明提供一种涂布机烘箱、二氧化硅复合绝热材料及其制备 方法，所述方法包括：提供软性基底层；将预制的二氧化硅绝热层浆料涂覆在所述软性基底层上，得到二氧化硅绝热预涂层；除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到所述二氧化硅复合绝热材料。通过上述方式，本发明通过除去二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂能够使多孔二氧化硅自身的孔道内及多孔二氧化硅颗粒之间的空隙中充满空气起到较好的绝热效果；而承载二氧化硅绝热层的基底为软性基底层，使制备的二氧化硅复合绝热材料较为柔软，有效降低了在使用过程中断裂的风险，使绝热过程更加可靠；同时，软性材料能能够通过缠绕的方式给不同形状的结构提供绝热层，不仅操作方便且应用范围广。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (20)

  1. 一种二氧化硅复合绝热材料的制备方法，所述方法包括：
    提供软性基底层；
    将预制的二氧化硅绝热层浆料涂覆在所述软性基底层上，得到二氧化硅绝热预涂层；
    去除所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到所述二氧化硅复合绝热材料；所述二氧化硅绝热层浆料包括多孔二氧化硅、粘结剂与水。
  2. 如权利要求1所述的方法，其特征在于，所述软性基底层为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合。
  3. 如权利要求1所述的方法，其特征在于，在所述将预制的二氧化硅绝热层浆料涂覆在所述软性基底层之前，所述方法还包括：
    将多孔二氧化硅、粘结剂与水混合均匀制备二氧化硅绝热层浆料。
  4. 如权利要求1所述的方法，其特征在于，所述除去所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到所述二氧化硅复合绝热材料的方法包括：
    将溶剂涂覆在所述二氧化硅绝热预涂层上，以使所述二氧化硅绝热预涂层中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂溶解并挥发，得到所述二氧化硅复合绝热材料。
  5. 如权利要求3所述的方法，其特征在于，所述粘结剂为低分子粘结剂，所述低分子粘结剂为甲基丙烯酸甲酯，偏氟乙烯或六氟丙烯中的一种或多种。
  6. 如权利要求4所述的方法，其特征在于，所述溶剂为四氯化碳，丙酮，乙醚或甲苯中的一种或多种。
  7. 如权利要求1所述的方法，其特征在于，所述二氧化硅绝热层的厚度为1μm-10mm。
  8. 一种二氧化硅复合绝热材料的制备方法，所述方法包括：
    提供金属基板；
    将预制的二氧化硅绝热层浆料涂覆在所述金属基板上，得到二氧化硅绝热预涂层；
    去除所述二氧化硅绝热层浆料中多孔二氧化硅颗粒间及多孔二氧化硅孔道内的粘结剂，得到二氧化硅膜片；
    将所述二氧化硅膜片从所述金属基板上剥离，并用粘结剂复合在所述软性基底层上，得到所述二氧化硅复合绝热材料。
  9. 一种二氧化硅复合绝热材料，其特征在于，所述二氧化硅复合绝热材料包括:
    软性基底层；
    复合在所述软性基底层上的二氧化硅绝热层。
  10. 如权利要求9所述的绝热材料，其特征在于，所述软性基底层包括聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合。
  11. 如权利要求9所述的绝热材料，其特征在于，所述二氧化硅为多孔二氧化硅，比表面积为100-1000m 2/g。
  12. 如权利要求9所述的绝热材料，其特征在于，所述二氧化硅绝热层的厚度为1μm-10mm。
  13. 一种二氧化硅复合绝热材料的制备方法，所述方法包括：
    提供挤压成型的二氧化硅干粉薄片；
    在所述二氧化硅干粉薄片两侧分别复合第一软性基底层和第二软性基底层，得到所述二氧化硅绝热材料。
  14. 如权利要求13所述的方法，其特征在于，所述第一软性基底层为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合；所述第二软性基底层为聚乙烯薄膜、聚丙烯薄膜、聚对苯二甲酸薄膜或聚甲基丙烯酸甲酯薄膜中的一种或复合。
  15. 如权利要求13所述的方法，其特征在于，所述二氧化硅干粉薄片的制备方法为，通过加压的方式将多孔二氧化硅干粉挤压成预设尺寸的二氧化硅干粉薄片。
  16. 如权利要求13所述的方法，其特征在于，通过粘结剂将所述第一软性基底层和所述第二软性基底层复合在所述二氧化硅干粉薄片两侧。
  17. 如权利要求16所述的方法，其特征在于，所述粘结剂为低分子粘结剂，所述低分子粘结剂为甲基丙烯酸甲酯，偏氟乙烯或六氟丙烯中的一种或多种。
  18. 一种二氧化硅复合绝热材料，其特征在于，所述二氧化硅复合绝热材料包括；
    二氧化硅干粉薄片层；
    第一软性基底层和第二软性基底层，分别复合在所述二氧化硅干粉薄片层两侧。
  19. 如权利要求18所述的绝热材料，其特征在于，所述二氧化硅干粉薄片的厚度为1μm-10mm。
  20. 一种涂布机烘箱，其特征在于，所述涂布机烘箱的保温层采用权利要求9或权利要求18任一项所述的二氧化硅复合绝热材料制备。
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CN103011745A (zh) * 2012-11-27 2013-04-03 天津大学 二氧化硅气凝胶隔热复合材料及制备方法
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CN108422722A (zh) * 2018-02-02 2018-08-21 深圳前海优容科技有限公司 一种涂布机烘箱、二氧化硅复合绝热材料及其制备方法

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