CN110077079B - Composite structure of aerogel and PET (polyethylene terephthalate) base material and preparation process thereof - Google Patents

Composite structure of aerogel and PET (polyethylene terephthalate) base material and preparation process thereof Download PDF

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CN110077079B
CN110077079B CN201910453921.6A CN201910453921A CN110077079B CN 110077079 B CN110077079 B CN 110077079B CN 201910453921 A CN201910453921 A CN 201910453921A CN 110077079 B CN110077079 B CN 110077079B
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aerogel
composite structure
pet
base material
coated
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CN110077079A (en
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周作成
刘付胜聪
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Yuqi Material Technology Changzhou Co.,Ltd.
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Zhejiang Kangting Electronic Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/04—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by at least one layer folded at the edge, e.g. over another layer ; characterised by at least one layer enveloping or enclosing a material
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/157—After-treatment of gels
    • C01B33/158—Purification; Drying; Dehydrating
    • C01B33/1585—Dehydration into aerogels

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Abstract

The invention relates to a composite structure of aerogel and a PET (polyethylene terephthalate) substrate and a preparation process thereof, and the composite structure comprises a substrate film, wherein the surface of the substrate film is provided with a plurality of grooves which are sunken downwards, aerogel particles are filled in the grooves, the cross section of each groove is in an inverted triangle shape, a trapezoid shape, a rectangle shape or a semicircular shape, and the surface of one side of the substrate film, provided with the grooves, is bonded with a protective layer. The invention provides a composite structure of aerogel and a PET (polyethylene terephthalate) base material and a preparation process thereof, which can effectively prevent the aerogel from falling off.

Description

Composite structure of aerogel and PET (polyethylene terephthalate) base material and preparation process thereof
Technical Field
The invention relates to the technical field of aerogel, in particular to a composite structure of aerogel and a PET (polyethylene terephthalate) base material and a preparation process thereof.
Background
The aerogel is a novel light nano porous amorphous solid material, is a solid with the minimum density in the world, and the density can be as low as 0.002g/cm3And has extremely high porosity. Meanwhile, the aerogel is a solid material with the minimum thermal conductivity in the world at present, and the room-temperature vacuum thermal conductivity can reach 0.001W/m.K. The aerogel high porosity makes it have unlimited pore wall, and these pore walls can effectual separation radiation heat conduction, and the diameter of hole is minimum, can restrain the convection heat conduction of the inside gaseous that contains of hole to effectively reduce coefficient of heat conductivity, therefore the aerogel is prepared favoured in the thermal insulation material field.
Chinese patent No. CN 103723995a provides a method for mixing glass wool felt and silica aerogel to make felt, which comprises preparing glass wool by centrifugal blowing process, spraying resin binder, and spraying silica aerogel slurry on the surface of the glass wool felt to form a composite material in which the glass wool felt and the aerogel are stacked, thereby preparing the composite material with excellent mechanical properties and good thermal insulation properties.
In the above-mentioned prior art scheme production and use, the aerogel of mixing in the glass cotton felt drops easily, appears falling the whitewashed phenomenon, falls the powder and can pollute production and service environment on the one hand, endangers producer and user's health, and on the other hand falls the thermal-insulated effect that keeps warm of whitewashed meeting greatly reduced material.
Disclosure of Invention
The invention aims to provide a composite structure of aerogel and a PET (polyethylene terephthalate) base material, which can effectively slow down the shedding of the aerogel.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a composite structure of aerogel and PET substrate, includes the substrate membrane, a plurality of undercut's recess has been seted up on substrate membrane surface, the recess intussuseption is filled with the aerogel granule.
Through adopting above-mentioned technical scheme, pack the aerogel granule in a plurality of recesses on substrate membrane surface, can play the protection effect to the aerogel granule, play better bearing effect to the aerogel granule, promote the linkage effect between aerogel granule and the substrate membrane, effectively slow down the possibility that the aerogel granule dropped in the use to also can avoid influencing the normal operating of equipment because of the aerogel granule drops when playing good thermal-insulated effect.
The invention is further provided with: each groove is parallel to each other, and the cross section of each groove is in an inverted triangle shape, a trapezoid shape, a rectangle shape or a semicircular shape.
Through adopting above-mentioned technical scheme, the recess of different cross-sections plays better bearing effect to the aerogel granule, makes in the recess can be arranged in steadily to the aerogel granule, effectively avoids the aerogel granule to fall out from the recess.
The invention is further configured to: each groove is arranged on the surface of the substrate film in a hexagonal arrangement, a tetragonal arrangement or a random arrangement, and the concave shape of each groove is a pyramid shape, a trapezoid shape, a cuboid shape or a semicircle.
Through adopting above-mentioned technical scheme, the recess of different cross-sections plays better bearing effect to the aerogel granule, makes in the recess can be arranged in steadily to the aerogel granule, effectively avoids the aerogel granule to fall out from the recess.
The invention is further configured to: and a protective layer is bonded on the surface of one side of the substrate film, which is provided with the groove.
Through adopting above-mentioned technical scheme, utilize the protective layer can play the protection effect to the aerogel granule in the recess, can further promote the stability of aerogel granule in the recess, avoid causing the aerogel granule to take place to drop because of external force in the use.
The invention is further configured to: the aerogel particles are silica aerogel particles.
By adopting the technical scheme, the thin nano network structure of the silica aerogel effectively limits the propagation of local thermal excitation, and the solid thermal conductivity of the silica aerogel is 2 to 3 orders of magnitude lower than that of a corresponding glass state material, so that a better heat insulation effect can be achieved.
The invention is further configured to: the aerogel particles are coated with a glue layer.
Through adopting above-mentioned technical scheme, utilize the glue film can promote the connection fastness between the adjacent aerogel granule, make the aerogel granule in every recess bond together more stably to can reduce the gap between the adjacent aerogel granule, make the aerogel granule denser, thereby reach better thermal-insulated effect.
The invention is further provided with: the adhesive layer is made of a high polymer material, the high polymer material is formed by polymerizing a soft monomer and a hard monomer, the soft monomer is at least one of butyl acrylate, ethyl acrylate and isooctyl acrylate, and the hard monomer is at least one of styrene, acrylonitrile, acrylamide and methyl acrylate.
By adopting the technical scheme, the soft monomer can provide the softness and the adhesiveness of the high polymer material, and the hard monomer can provide the moderate strength and hardness of the high polymer material.
Another objective of the present invention is to provide a preparation process of a composite structure of aerogel and PET substrate, which can effectively slow down the shedding of aerogel particles.
In order to achieve the purpose, the technical scheme of the invention is as follows: preparation of a composite structure of aerogel and PET substrate, comprising the following steps:
step A: adding deionized water, an emulsifier, acrylate, styrene and silicon dioxide aerogel particles into a reaction kettle, uniformly stirring, controlling the stirring speed at 500-600 rpm/min, and stirring for 15-30 min;
and B: raising the temperature of the reaction kettle to 65-85 ℃, slowly dripping an initiator, controlling the initiator to be completely dripped within 30-60 min, continuously reacting for 2-3 h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid to obtain silicon dioxide aerogel particle microspheres coated with high polymer materials on the surfaces;
and C: coating the silica aerogel particle microspheres coated with the polymer materials on the surface of the substrate film in the grooves, drying, forming a silica aerogel particle microsphere coating coated with the polymer materials on the substrate film, and finally adhering a protective layer on the surface of the silica aerogel particle microspheres coated with the polymer materials on the surface.
By adopting the technical scheme, firstly, deionized water, an emulsifier, acrylic ester, styrene and SiO2Mixing and uniformly stirring the aerogel so as to ensure that all materials in the reaction kettle are fully contacted; the temperature of the reaction kettle is increased to 65-85 ℃, the temperature is the polymerization temperature of styrene and acrylic ester, sudden polymerization is easy to cause if the temperature is too high, the reaction is slow due to too low temperature, the reaction period is long, and incomplete reaction can be caused; then, dropwise adding an initiator to initiate polymerization reaction of acrylate and styrene, after the reaction is finished, separating solid and liquid in the reaction kettle in a filtering mode, and drying the solid to obtain silica aerogel particle microspheres with surfaces coated with high polymer materials, wherein the microsphere structure can prevent the silica aerogel particles from falling; then coating the silica aerogel particle microspheres coated with the high polymer material on the substrate film with the grooves uniformly distributed on the surface by adopting a coating mode, so that a silica aerogel particle microsphere coating coated with the high polymer material on the surface is formed on the substrate film, and the composite material integrating the advantages of the substrate film and the silica aerogel particle microspheres is prepared; and finally, the protective layer is bonded, the aerogel coating coated by the high polymer material is better fixed on the base material film, and the silicon dioxide aerogel particles of the base material film can be prevented from falling, so that the powder falling phenomenon is prevented.
To sum up, utilize a plurality of recesses on substrate membrane surface to play the effect of effectively placing to the aerogel granule to rely on the protective layer to play good protection effect to the aerogel granule on substrate membrane surface, thereby avoid leading to the aerogel granule on substrate membrane surface to take place to drop in the use.
Drawings
FIG. 1 is a side view of the first embodiment;
FIG. 2 is a schematic side view of the second embodiment;
FIG. 3 is a schematic side view of the third embodiment;
fig. 4 is a side view schematically illustrating a fourth embodiment of the present invention.
In the figure, 1, a substrate film; 2. a groove; 3. aerogel particles; 4. a protective layer; 5. an adhesive layer; 6. a contact surface; 7. and (6) coating the edges.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The first embodiment is as follows:
the utility model provides a composite construction of aerogel and PET substrate, refers to fig. 1 and shows, includes substrate membrane 1, and it has aerogel layer to fill to inlay at substrate membrane 1 surface, and aerogel layer includes a plurality of aerogel particles 3 of densely arranging, and silica aerogel particle is chooseed for use to aerogel particle 3.
In order to promote aerogel granule 3 and substrate membrane 1's connection fastness, substrate membrane 1 can select for use PET, a plurality of undercut's recess 2 has been seted up on substrate membrane 1's surface, every recess 2 is the strip and is parallel to each other, every recess 2's cross-section is down triangle-shaped or trapezoidal or rectangle or semi-circular, utilize recess 2 can be used for bearing aerogel granule 3, thereby promote the stability of aerogel granule 3 on substrate membrane 1 surface, effectively reduce dropping of aerogel granule 3 in the use.
In order to further promote the stability of being connected between aerogel granule 3 and the substrate membrane 1, it has protective layer 4 to set up one side surface bonding of recess 2 at substrate membrane 1, the PET membrane can be chooseed for use to protective layer 4, also can choose the film that can shield the electromagnetism made by ferromagnetic alloy for use, protective layer 4 has viscidity adhesive linkage 5 towards one side coating of substrate membrane 1, adhesive linkage 5 compounds in substrate membrane 1 surface, and in order to promote the joint strength between protective layer 4 and the substrate membrane 1, leave certain interval between adjacent recess 2, thereby form and be parallel contact surface 6 with substrate membrane 1 bottom surface, and make protective layer 4 can paste smoothly and cover in contact surface 6, and play the guard action to aerogel granule 3 in the recess 2.
Example two:
the utility model provides a composite construction of aerogel and PET substrate, the difference with embodiment one lies in, as shown in figure 2, in order to avoid aerogel granule 3 to drop from the side, outwards extend the edge of protective layer 4 has cladding limit 7, cladding limit 7 surrounds in the lateral wall of substrate membrane 1 and bonds in the bottom surface that substrate membrane 1 deviates from recess 2 one side to can play good cladding protection effect to inside aerogel granule 3, then can effectively reduce dropping of aerogel granule 3.
Example three:
the difference between the composite structure of aerogel and PET substrate and the first embodiment is that, as shown in fig. 3, the cross section of the groove 2 is trapezoidal, and the width of the upper side of the trapezoidal cross section is smaller than the width of the lower side of the trapezoidal cross section, so that the aerogel particles 3 in the groove 2 are more stable.
Example four:
a composite structure of aerogel and a PET substrate is different from the first embodiment in that, referring to fig. 4, a plurality of grooves 2 are arranged on the surface of a substrate film 1 in a hexagonal arrangement, a tetragonal arrangement or a random arrangement, and the cross section of each groove 2 is in an inverted triangle shape, a trapezoid shape, a rectangle shape or a semicircle shape.
Example five:
the utility model provides a composite construction of aerogel and PET substrate, the difference with embodiment one lies in, all coats at the outer wall of aerogel granule 3 and has the glue film (not marked in the figure), utilizes the glue film to make adjacent aerogel granule 3 hug closely mutually to make aerogel granule 3 can stably place in recess 2, and make aerogel granule 3 bond each other. The adhesive layer is made of a high polymer material, the high polymer material is formed by polymerizing a soft monomer and a hard monomer, the soft monomer is at least one of butyl acrylate, ethyl acrylate and isooctyl acrylate, and the hard monomer is at least one of styrene, acrylonitrile, acrylamide and methyl acrylate.
Example six:
a composite structure of aerogel and PET substrate comprises an aerogel layer, a PET substrate film 1 and a protective layer 4.
The aerogel layer is silica aerogel particle 3, and the silica aerogel particle 3 is wrapped up by the glue film, the glue film is the high molecular material, the high molecular material is polymerized by soft monomer butyl acrylate and hard monomer styrene and got, the preparation process of this composite construction includes the following steps:
step A: adding 5 parts by mass of deionized water, 58 parts by mass of butyl acrylate, 46 parts by mass of styrene, 3 parts by mass of sodium dodecyl sulfate serving as an emulsifier and 80 parts by mass of silicon dioxide aerogel particles into a reaction kettle, uniformly stirring, controlling the stirring speed at 500rpm/min, and stirring for 15 min;
and B: raising the temperature of the reaction kettle to 80 ℃, slowly dropwise adding 0.5 part by mass of 30% potassium persulfate serving as an initiator, controlling the initiator potassium persulfate to be completely dropwise added within 30min, continuously reacting for 2h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid in an oven at 80 ℃ to obtain the silica aerogel particle microspheres with the surfaces coated with the high polymer material;
and C: coating the silica aerogel particle microspheres coated with the polymer material on the surface of a PET (polyethylene terephthalate) substrate film 1 uniformly provided with rectangular grooves by adopting a roller coating method, controlling the coating temperature to be 65 ℃, controlling the coating speed to be 6m/min, naturally drying, forming a silica aerogel particle microsphere coating coated with the polymer material on the surface of the PET substrate film 1, and finally adhering a protective layer 4 on the surface of the silica aerogel particle microsphere coating coated with the polymer material on the surface, wherein the protective layer 4 is made of single-sided adhesive.
The resulting composite structure of the aerogel layer and the PET substrate film 1 was subjected to a hot pressThe thermal conductivity coefficient, the bending resistance and the friction resistance are detected, and the thermal conductivity coefficient of the composite structure is 0.024 W.m-1·K-1The obtained product is bent at 90 ℃, the composite structure is intact and has no damage trace, and the negative pressure is 400N/m2The mass loss is 0.43 percent after 1000 times of friction.
Example seven:
a composite structure of aerogel and PET substrate comprises an aerogel layer, a PET substrate film 1 and a protective layer 4.
The aerogel layer is silica aerogel particle 3, and the silica aerogel particle 3 is wrapped up by the glue film, the glue film is the high molecular material, the high molecular material is polymerized by soft monomer butyl acrylate and hard monomer styrene and got, the preparation process of this composite construction includes the following steps:
step A: deionized water 4 parts by mass, butyl acrylate 40 parts by mass, styrene 52 parts by mass, emulsifier 2.5 parts by mass and SiO 90 parts by mass2Adding the aerogel into the reaction kettle, uniformly stirring, controlling the stirring speed at 600rpm/min, and stirring for 20 min;
and B: raising the temperature of the reaction kettle to 75 ℃, slowly dropwise adding a mixture of 30% ammonium persulfate and azobisisobutyronitrile in parts by mass as an initiator, controlling the initiator to be completely dropwise added within 60min, continuously reacting for 2.5h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid in an oven at 60 ℃ to obtain silica aerogel particle microspheres coated with the high polymer material on the surface;
and C: coating the silica aerogel particle microspheres coated with the polymer material on the surface of a PET (polyethylene terephthalate) substrate film 1 uniformly provided with rectangular grooves by adopting a roller coating method, controlling the coating temperature to be 70 ℃, controlling the coating speed to be 5m/min, naturally drying, forming a silica aerogel particle microsphere coating coated with the polymer material on the surface of the PET substrate film 1, and finally adhering a protective layer 4 on the surface of the silica aerogel particle microsphere coating coated with the polymer material on the surface, wherein the protective layer 4 is made of single-sided adhesive.
Subjecting the obtained aerogel to PET baseThe composite structure of the material is tested for normal temperature heat conductivity coefficient, bending resistance and friction resistance, and the heat conductivity coefficient of the composite structure is 0.021 W.m-1·K-1The obtained product is bent at 90 ℃, the composite structure is intact and has no damage trace, and the negative pressure is 400N/m2The mass loss is 0.41 percent after 1000 times of friction.
Example eight:
a composite structure of aerogel and PET substrate comprises an aerogel layer, a PET substrate film 1 and a protective layer 4.
The aerogel is silicon dioxide aerogel particle 3, and the silica dioxide aerogel particle 3 is wrapped up by the glue film, the glue film is the macromolecular material, the macromolecular material is polymerized by soft monomer ethyl acrylate, hard monomer styrene and methyl methacrylate and gets, the preparation process of this composite construction includes the following steps:
step A: adding 6 parts by mass of deionized water, 65 parts by mass of ethyl acrylate, 60 parts by mass of styrene, 10 parts by mass of methyl methacrylate, 4 parts by mass of emulsifier and 95 parts by mass of silicon dioxide aerogel particles into a reaction kettle, uniformly stirring, controlling the stirring speed at 600rpm/min, and stirring for 25 min;
and B: raising the temperature of the reaction kettle to 65 ℃, slowly dropwise adding a mixture of 30% potassium persulfate and azobisisobutyronitrile in parts by mass as an initiator, controlling the initiator to be completely dropwise added within 45min, continuously reacting for 2.5h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid in a 75 ℃ drying oven to obtain silica aerogel particle microspheres coated with the high polymer material on the surface;
and C: coating the silica aerogel particle microspheres coated with the polymer materials on the surface of a PET (polyethylene terephthalate) substrate film 1 uniformly provided with rectangular grooves on the surface by adopting a roller coating method, controlling the coating temperature to be 90 ℃, controlling the coating speed to be 7m/min, forming a silica aerogel particle microsphere coating coated with the polymer materials on the surface of the PET substrate film 1 after natural drying, and finally adhering a protective layer 4 on the surface of the silica aerogel particle microsphere coating coated with the polymer materials on the surface, wherein the protective layer 4 is made of single-sided adhesive.
The obtained aerogel and PET substrate composite structure is subjected to normal-temperature heat conductivity coefficient, bending resistance and friction resistance detection, and the heat conductivity coefficient of the composite structure is 0.020 W.m-1·K-1The obtained product is bent at 90 ℃, the composite structure is intact and has no damage trace, and the negative pressure is 400N/m2The mass loss is 0.37 percent after 1000 times of friction.
Example nine:
a composite structure of aerogel and PET substrate comprises an aerogel layer, a PET substrate film 1 and a protective layer 4.
The aerogel layer is silica aerogel particle 3, and the silica aerogel particle 3 is wrapped up by the glue film, the glue film is the macromolecular material, the macromolecular material is polymerized by soft monomer butyl acrylate and ethyl acrylate, hard monomer styrene and methyl methacrylate and gets, the preparation process of this composite construction includes the following steps:
step A: adding 5.5 parts by mass of deionized water, 25 parts by mass of ethyl acrylate, 25 parts by mass of butyl acrylate, 40 parts by mass of styrene, 20 parts by mass of methyl methacrylate, 4.5 parts by mass of emulsifier and 100 parts by mass of silicon dioxide aerogel particles into a reaction kettle, uniformly stirring, controlling the stirring speed at 600rpm/min, and stirring for 30 min;
and B: raising the temperature of the reaction kettle to 70 ℃, slowly dropwise adding 0.45 part by mass of 30% potassium persulfate serving as an initiator, controlling the initiator to be completely dropwise added within 50min, continuously reacting for 3h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid in a drying oven at 70 ℃ to obtain silica aerogel particle microspheres with surfaces coated with high polymer materials;
and C: coating the silica aerogel particle microspheres coated with the polymer material on the surface of a PET (polyethylene terephthalate) substrate film 1 uniformly provided with rectangular grooves by adopting a roller coating method, controlling the coating temperature to be 80 ℃, controlling the coating speed to be 8m/min, naturally drying, forming a silica aerogel particle microsphere coating coated with the polymer material on the surface of the PET substrate film 1, and finally adhering a layer of single-sided adhesive on the surface of the silica aerogel particle microsphere coating coated with the polymer material.
The obtained aerogel and PET base material composite structure is subjected to normal-temperature heat conductivity coefficient, bending resistance and friction resistance detection, and the heat conductivity coefficient of the composite structure is 0.018 W.m-1·K-1The obtained product is bent at 90 ℃, the composite structure is intact and has no damage trace, and the negative pressure is 400N/m2The mass loss is 0.39% after 1000 times of friction.
Example ten:
a composite structure of aerogel and PET substrate comprises an aerogel layer, a PET substrate film 1 and a protective layer 4.
The aerogel layer is silica aerogel particle 3, and the silica aerogel particle 3 is wrapped up by the glue film, the glue film is the macromolecular material, the macromolecular material is polymerized by soft monomer butyl acrylate and hard monomer styrene and gets, the preparation process of this composite construction includes the following steps:
step A: adding 4.5 parts by mass of deionized water, 45 parts by mass of ethyl acrylate, 60 parts by mass of styrene, 3.5 parts by mass of emulsifier and 85 parts by mass of silica aerogel particles into a reaction kettle, uniformly stirring, controlling the stirring speed at 600rpm/min, and stirring for 30 min;
and B: raising the temperature of the reaction kettle to 85 ℃, slowly dropwise adding 0.45 part by mass of 30% potassium persulfate serving as an initiator, controlling the initiator to be completely dropwise added within 40min, continuously reacting for 3h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid in a 65 ℃ drying oven to obtain silica aerogel particle microspheres with the surfaces coated with the high polymer material;
and C: coating the silica aerogel particle microspheres coated with the high polymer material on the surface of a PET (polyethylene terephthalate) base material film 1 uniformly provided with saw-toothed grooves by adopting a roll coating method, controlling the coating temperature to be 85 ℃, controlling the coating speed to be 4m/min, naturally drying, forming a silica aerogel particle microsphere coating coated with the high polymer material on the surface of the PET base material film 1, and finally adhering a protective layer on the surface of the silica aerogel particle microsphere coating coated with the high polymer material, wherein the protective layer is made of single-sided adhesive;
the obtained composite structure of the aerogel and the PET base material film is subjected to normal-temperature heat conductivity coefficient, bending resistance and friction resistance detection, and the heat conductivity coefficient of the composite structure is 0.022 W.m-1·K-1The obtained product is bent at 90 ℃, the composite structure is intact and has no damage trace, and the negative pressure is 400N/m2The mass loss is 0.42 percent after 1000 times of friction.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims (3)

1. The utility model provides a composite construction of aerogel and PET substrate which characterized in that: the aerogel composite membrane comprises a base material membrane (1), wherein a plurality of grooves (2) which are sunken downwards are formed in the surface of the base material membrane (1), and aerogel particles (3) are filled in the grooves (2); each groove (2) is randomly arranged on the surface of the base material film (1), and the concave shape of each groove (2) is pyramid, trapezoid, cuboid or semicircular; a protective layer (4) is bonded on the surface of one side of the base material film (1) provided with the groove (2); a glue layer is coated outside the aerogel particles (3); the adhesive layer is made of a high polymer material, the high polymer material is formed by polymerizing a soft monomer and a hard monomer, the soft monomer is at least one of butyl acrylate, ethyl acrylate and isooctyl acrylate, and the hard monomer is at least one of styrene, acrylonitrile, acrylamide and methyl acrylate.
2. The aerogel and PET substrate composite structure of claim 1, wherein: the aerogel particles (3) are silica aerogel particles.
3. A process for preparing a composite structure of aerogel and PET substrate as claimed in claim 1, characterized in that: the method comprises the following steps:
step A: adding deionized water, an emulsifier, butyl acrylate, styrene and silicon dioxide aerogel particles into a reaction kettle, uniformly stirring, controlling the stirring speed at 500-600 rpm/min, and stirring for 15-30 min;
and B: raising the temperature of the reaction kettle to 65-85 ℃, slowly dripping an initiator, controlling the initiator to be completely dripped within 30-60 min, continuously reacting for 2-3 h, separating solid and liquid in the reaction kettle by adopting a filtering method, and drying the solid to obtain silicon dioxide aerogel particle microspheres coated with high polymer materials on the surfaces;
and C: coating the silica aerogel particle microspheres coated with the polymer materials on the surface of the substrate film (1) on the grooves (2), drying, forming a silica aerogel particle microsphere coating coated with the polymer materials on the substrate film (1), and finally adhering a protective layer (4) on the surface of the silica aerogel particle microsphere coating coated with the polymer materials on the surface.
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