WO2009107873A1

WO2009107873A1 - Method of gluing objects together

Info

Publication number: WO2009107873A1
Application number: PCT/JP2009/054233
Authority: WO
Inventors: 渋田匠; 江口裕規; 阪谷泰一
Original assignee: 住友化学株式会社
Priority date: 2008-02-29
Filing date: 2009-02-27
Publication date: 2009-09-03
Also published as: JP2009227986A; TW201000584A

Abstract

Disclosed is a method of adhering a first object, which has at least one point with a curvature radius of 1μm or smaller, to a second object by means of a nonvolatile liquid. The method has a process for placing the nonvolatile liquid between an area of the first object including at least one point with a curvature radius of 1μm or smaller and the second object.

Description

Technical field

The present invention relates to an object bonding method, and more particularly, to a method for bonding a first object having a radius of curvature of 1 μm or less and a second object with a non-volatile liquid. Background art

A special adhesive is usually used to bond objects to each other. A method of bonding by heating through a mixture having a double or triple bond reactive with polyolefin between plastic and metal, or between plastic and metal (Japanese Patent Laid-Open No. 5-4-3 8 3 3 5) And a method using a two-component reactive adhesive having photo-curing properties (see Japanese Patent Application Laid-Open No. 5-9-6 8 6 36).

There is a need for a method that can easily bond an object to each other and achieve high adhesion. Disclosure of the invention

The present invention provides a method for adhering an object and an object that can easily bond the object and the object and can achieve a high adhesive force.

The present invention is a method of bonding a first object having at least one point with a radius of curvature of 1 μm or less to a second object with a non-volatile liquid, wherein the first object has a curvature radius of 1 There is provided a method including a step of positioning the non-volatile liquid between a region including at least one point that is μm or less and the second object. BEST MODE FOR CARRYING OUT THE INVENTION

The present invention is a method of bonding a first object having at least one point with a radius of curvature of 1 μm or less to a second object with a non-volatile liquid, wherein the first object has a radius of curvature of 1 A method comprising the step of positioning the non-volatile liquid between a region including at least one point that is equal to or less than μ ΐη and the second object.

In one preferred embodiment, the first object is a particle having a particle size of 1 μm or less.

In another preferred embodiment, the method includes the step of preparing a dispersion by mixing the non-volatile liquid, a solvent, and a plurality of objects, each of which is the first object. Contacting the dispersion with the second object;

Removing the solvent from the dispersion in contact with the second object.

In this embodiment, preferably, the method further comprises a step of bringing the dispersion in contact with the second object or the dispersion to be in contact with the second object into contact with the third object. ,

The step of removing the solvent is a method that is performed in a state where the dispersion is in contact with the third object. According to this method, in addition to being able to bond a plurality of first objects to a second object, the plurality of first objects can also be bonded to a third object.

In another preferred embodiment, the method includes mixing the non-volatile liquid, a solvent, a plurality of objects each being the first object, and a plurality of objects each being a second object. And preparing a dispersion,

Removing the solvent from the dispersion;

It has further. According to this method, in addition to bonding the first object and the second object, the first objects are bonded together, and the second objects are bonded together.

In another preferred embodiment, the method includes: the non-volatile liquid; a solvent; a plurality of objects each being the first object; a plurality of objects each being a second object; Preparing a dispersion by mixing with a third object of

Removing the solvent from the dispersion;

It has further. According to this method, in addition to being able to bond the first object to the second object, the first object and the second object can also be bonded to the third object. Further, according to this method, the first objects are also bonded to each other, and the second objects are also bonded to each other. The third object is also glued together.

In the present invention, the non-volatile liquid is a liquid that does not substantially volatilize at the temperature and pressure of the atmosphere in the bonding process, and may be an inorganic substance (including metal) or an organic substance. If it meets the above, there is no particular limitation. Examples include liquefied aluminum, iron, zinc, copper, silver, gold, platinum, mercury, and tungsten.

The inorganic substance is not particularly limited as long as it takes a liquefied state and satisfies the above conditions, and examples thereof include various salts such as oxides, hydroxides and sulfides. Liquefied low-melting glass, low-melting salt, etc. are preferably used. The organic substance is not particularly limited as long as it takes a liquefied state and satisfies the above conditions, and various organic compounds can be mentioned. An ion liquid which is a salt of an organic compound having a charge is preferably used.

In the present invention, the ionic liquid is a liquid consisting only of ions composed of a combination of an organic cation and an anion. Examples thereof include imidazolium salts, pyridinium salts, pyrrolidinium salts, phosphonium salts, ammonium salts, guanidinium salts. Salts that are liquid at room temperature, such as salt, isoronium salt, isothiol-um salt, and the like.

(Imidazolium salt)

1,3_Dimethylimidazole trifluoromethanesulfonate, 1-ethyl 1-methylimidazolium bis [oxalate (2 _)] borate, 1-ethyl 1-methylimidazole tetrafluoro Loborate, 1-Ethyl-1-methylimidazole Promide, 1-Ethyl-1-3-Methylimidazolium Chloride, 1_Ethyl-1-3-Methylimidazole Hexafluorophosphate, 1 1-Ethyl 1-Methyl imidazolium trifluoromethanesulfonate, 1-Ethyl 3-methyl imidazole trifluoroacetate, 1 —Ethyl _ 3-methylimidazole methyl sulfate, 1— 1—Meth Norley Midazolium p—Torolenos Norephone, 1—Ethnolay 3'—Metino Rei Midori Zhiorum Thion 1_Butyl-3-methylimidazole trifluoromethanesulfonate, 1_Butyl_3-methylimidazole Tetrafluoroborate, 1-Butinole 1-Methylimidazole Hexafluororeophosphato 1-Butyl_3-methylimidazolium methylsulfate, 1-Butyl-3-methylimidazolium chloride, 1-Butyl-3-methylimidazolium bromide, 1-butyl-1-methylimidazolium Trifluoroloacetate, 1-Butyl-1-3-Methylimidazolium sulfate, 1 —Hexyl _ 3-Methylenoremidazolium bis (Trifnoroleolomethinosulphonyl) imide, 1 —Hexyl 1—3 Methyl imidazolium chloride, 1_hexyl 1-methyl imidazole tetrafluorobore 1-hexyl 3-methyl hexazolium hexafnoroleolophosphate, 1-hexylol 3-trimethylimidazole tris (pentafluoroethyl) trifluorophosphate, 3-methyl 1-octylimidazole hexafluorophosphate, 3-methyl-1 1-octylimidazolium chloride, 3-methyl-1- 1-octylimidazolium tetrafluoroborate, 3-methyl-1 1-octylimidazolium bis (trifluoromethylsulfonyl) imidazole, 3_methyl mono 1— Octylimidazole sulfate Octylsulfate, 3-methyl-1-tetradecyl imidazole tetrafluoroborate, 1_hexadecyl-1-3-methylimidazolium chloride, 3-methyl-1-octadecylimidazole Li © beam to key support fluorophosphate Fay DOO, ₃ _ methyl _ 1 O Kuta decyl imidazolinium © beam bi scan (triflate Ruo b methylsulfonyl) imide, 3-methyl-one 1 Okutadeshirui Midazori © beam tri (Pentafuruo Loetyl) trifluorophosphate, 1-ethyl-2-, 3-dimethylimidazolium bromide, 1-ethyl-2-, 3-dimethylimidazole tetrafluoroborate, 1_ethyl-1,2,3-dimethyl Tilididium hexafluorophosphate, 1-ethyl-1,2-dimethylimidazolium chloride, 1 1-Ethyl 1, 3-Dimethylimidazole p-Toluenesulfonate, 1_Butyl1-2,3-Dimethylimidazole Tetrafluoroborate, 1_Butyl-2,3-Dimethylimidazole Chloride, 1_Butyl-1,3-dimethylimidazole hexafluorophosphate, 1_Butyl-1,3-dimethylimidazole sulfate, 1-Hexyl_2,3-Dimethyl Imidazol chloride, 1-hexadecyl-1,3-dimethylimidazole chloride

(Pyridinium salt)

N-ethylpyridinium chloride, N-ethylpyridinium bromide, N-butylpyridinium chloride, N_butylpyridinium tetrafluoroborate, N-butyl Pyridinium hexafluorophosphate, N-butylpyridine trifluoromethanesulfonate, N-hexylpyridinium tetrafluoroborate, N-hexylpyridinium hexafluorophosphate N-Hexylpyridinium bis (trimethylmethylsulfonyl) imide, N-Hexylpyridinium trifluoromethanesulfonate, N-octylpyridinium chloride, 4-methyl-1-N-butylpyridini Um chloride, 4-methyl-1-N-butylpyridinium tetrafluoroborate, 4-methyl-1-N-butylpyridinium hexafluoro Phosphate, 3_Methyl-1-N-butylpyridinium chloride, 4-Methyl-1-N-butylpyridinium bromide, 3,4-Dimethyl-1-N-butylpyridinium chloride, 3, 5_Dimethyl-N —Butylpyridinium chloride

(Pyrrolidinium salt)

1-Butyl-1 Monomethylpyrrolidinium chloride, 1-Butyl_ 1-Methylpyrrolidinium trifluoromethanesulphonate, 1-Butyl-1-methylpyrrolidinium bis (trifluoromethylsulphonyl) imide, 1— Butyl 1 Methylpyrrolidinium Tetrafluoroborate, 1-Butyl_ 1-Methylpyrrolidinium Hexafluorophosphate, 1-Butyl 1-Methylpyrrolidinium Tris (pentafu / leorochinole) Trifnoreo oral phosphate, 1-Butyl _ 1-Methylpyrrolidinium trifluoroacetate, 1-Hexiloux 1-Methylpyrrolidinium chloride, 1-Methylpyrrolidinyl chloride 1'-Methylpyrrolidinium chloride '

(Phosphonium salt)

Trihexyl (tetradecyl) phosphonium chloride, Trihexyl (Tetradecis / Le) Phosphonium tris (Pentafnorolechetinore) Trifnoreo oral phosphate, Trihexyl (Tetradecyl) Phosphonium tetrafluoroborate , Trihexyl (tetradecyl) phospho-umbis (trifluoromethylsulfonyl) imido, trihexyl (tetradecyl) phosphonium hexafluor oral phosphate, trihexyl (tetradecyl) phosphonium bis [oxalate (2 —)] Boreto I

(Ammonium salt)

Methyltrioctylammonium trifluoroacetate, Methyltrioctylammonium trifluoromethanesulfonate, Methyltrioctylammonium bis (trifnoroleolomethinolesulfonyl) imide

(Guanidinium salt)

N "—Etyl I N, N, Ν ', Ν'-Tetramethinoreguanidinium Tris Pentafu / Leoloche; ^ Le) Trifnoreo mouth phosphate, Guanidinium Tris (pentafluoroeutil) trifluorophosphate, Guanidinium trifluoromethanesulfonate, Ν "—Ethyl Ν, Ν, ', N' — Tetramethylguanidinium trifluoromethanesulfonate

(Isolonium salt)

○ _Ethyl 1 ^, Ν, Ν ', Ν' Tetramethylisouronium trifluoromethanesulfonate, Ο—Ethyl Ν, Ν, Ν ', N' — Tetramethylisolone Tri Leorotil) Trifluorophosphate

(Isochoronium salt)

S—Ethyl Ν, Ν, Ν ', N' — Tetramethylisothoronium trifluoromethanesulfonate, S—Ethyl Ν, Ν, Ν ', N' — Tetramethylisosotronum Tris (Pentafnorolero Chile) Trifuno Leo mouth phosphate

From the viewpoint of easy availability and handling, the ionic liquid is imidazolium. A salt is preferred, and 1-ethyl-1-methylimidazole tetrafluoroborate is particularly preferred.

In the present invention, the first object, the second object, and the third object are each independently an object made of a solid material such as a metal, a resin, an inorganic material, or a carbide. Examples of the metal include platinum, gold, silver, copper, aluminum, nickel, tantalum, and tungsten. Silver is preferable. Examples of resins include acrylic resins, styrene resins, polyethylene resins, PAN resins, nylon resins, polyurethane resins, phenolic resins, silicone resins, benzoguanamine resins, and melamine resins. Examples thereof include resin and fluorine resin, and styrene resin is preferable. Examples of inorganic substances include silicon oxide (silica), titanium oxide, aluminum oxide, zirconium oxide, zinc oxide, tin oxide, ITO, calcium carbonate, barium sulfate, talc, kaolin, barium titanate, aluminum nitride, Examples thereof include silicon nitride, boron nitride, silicon carbide, and zeolite. Preferred are silicon oxide (silica) and aluminum oxide. Examples of the carbide include activated carbon, carbon black, acetylene black, ketjen black, graphite, bonbon nanotube, bonbon nanofiber, carbon nanosphere, fullerene, and diamond, and activated carbon and carbon black are preferable. .

The material of the first object and the material of the second object may be the same or different, and the material of the first object and the material of the third object may be the same or different, and the material of the second object And the material of the third object may be the same or different.

In addition, the first object, the second object, and the third object may be electrode materials independently of each other.

The electrode material is an active material such as a positive electrode active material, a negative electrode active material, or a capacitor active material. An active material is a substance that emits and takes up electrons by a chemical reaction with an electrolyte. Therefore, an electrode formed using the electrode material can be suitably used for an electricity storage device including an electric double layer capacitor, a chemical battery such as a primary battery, a secondary battery, and a fuel cell.

The shape of the first object, the shape of the second object, and the shape of the third object are each independently arbitrary, such as a spherical shape, a needle shape, a flake shape, a fiber shape, a plate shape, etc. Let ’s go. From the viewpoint of the adhesive strength achieved, the first object has a radius of curvature of 1 / x rn or less, preferably 0.1 im or less, more preferably 0.05 / m or less, and even more preferably 0 An object having at least one point, preferably two or more points, of less than 0.1 Xm, most preferably less than 0.05 m. If an object that does not have a point with a radius of curvature of 1 ^ _m or less is used instead of such a first object, the capillary force is strong. Since it does not appear, sufficiently strong adhesion may not be developed between the adherends (first object, second object, and third object). The second object and the third object may or may not have points with a radius of curvature of 1 μm or less. Note that the radius of curvature of an object can be obtained using images observed with a scanning electron microscope (SEM), a transmission electron microscope (TEM), an atomic force microscope (AFM), and the like. In the present invention, an object having a diameter of about 10 μm or less is referred to as “particle”. If the object is a spherical particle, the half value of the particle diameter (particle size) is the radius of curvature at every point on the surface of the particle. In the present invention, the particle diameter of an object refers to an average particle diameter measured by a dynamic light scattering method, a Sears method, or a laser-diffraction scattering method, or a sphere equivalent diameter calculated from a BET specific surface area. From the viewpoint of the adhesive strength achieved, the particle size of the particles as the first object, the second object, or the third object is preferably l / zm or less, more preferably 0.1 / Xm or less, 0.05 jum or less is more preferred, 0.01 μm or less is more preferred, and 0.005 μm or less is more preferred. The first object is preferably a spherical particle, an acicular particle, or a chain particle. A chain particle is a particle having a structure in which a plurality of spherical particles are connected. Examples of spherical particles include SNOWTEX ST—XS (trade name) and SNOWTEX ST—XL (trade name) manufactured by Nissan Chemical Industries, Ltd. Examples of chain particles include Nissan Chemical Industries, Ltd. Examples include Snowtex PS-S and Snowtex PS-SO (trade name). “Snowtex” is a registered trademark in Japan.

Each of the second object and the third object may independently be a particle, a film, a sheet, a fiber, a molded body, or the like.

The first object has a radius of curvature of 1 / im or less, preferably 0.1 / m or less, and more preferably 0.05 m or less. Is done. Further, the first object is a third non-volatile liquid at a point of curvature radius l / m or less, preferably 0. l jn m or less, more preferably 0.0 5 μm or less and at or around Z. It can also be glued to objects.

For example, when an ionic liquid is used as the non-volatile liquid, even if it is heated to a high temperature of about 400 ° C., it remains between the objects, and the capillary force works so that the objects are strongly drawn together, thereby solidifying the objects. It is considered that the effect of densifying and as a result, densifying the object assembly resulting from the adhesion is manifested.

The amount of the object having a radius of curvature of 1 _μm or less is preferably 3 to 100 parts by weight, more preferably 10 to 100 parts by weight with respect to 1 part by weight of the non-volatile liquid. More preferably, it is 10 to 200 parts by weight. If the amount is less than 3 parts by weight, the objects tend to maintain fluidity and do not exhibit adhesiveness. When the amount is larger than the amount, the capillary force does not sufficiently act on the non-volatile liquid, and there is a tendency that the adhesiveness is not exhibited.

In order for the capillary force to sufficiently act on the non-volatile liquid between the objects, it is preferable to reduce the distance between these objects, and the distance between these objects is preferably 1 zm or less. More preferably, it is 1 μm or less, more preferably 0.001 l / zm or less, and most preferably 0.02 m or less. However, since the non-volatile liquid is difficult to be inserted between the objects if the objects are too close to each other, the distance between the objects is preferably larger than the molecular size of the non-volatile liquid. Examples of the method of adhering the first object of the present invention to the second object or the method of adhering the first object to the second object and the third object include the following methods (1) to (4): Is mentioned.

(1) A non-volatile liquid is injected into the contact point after the point of curvature radius 1 / χ ΐη or less of the first object is brought into contact with the second object.

(2) A point with a radius of curvature of 1 / zm or less of the first object is in contact with the second object, and the radius of curvature of the first object other than the point where it is bonded to the second object is 1 // m or less After the point is in contact with a third object, a non-volatile liquid is injected into each contact.

(3) After the point of curvature radius of 1 m or less of the first object is brought into contact with the second object, a non-volatile liquid diluted with a solvent is injected into the interface, and then the solvent is evaporated and removed.

(4) A point with a radius of curvature of 1 / zm or less other than the point where the first object has a radius of curvature of 1 m or less in contact with the second object and the first object is bonded to the second object Is brought into contact with a third object, and then a non-volatile liquid diluted with a solvent is injected into both contacts, and then the solvent is evaporated and removed.

A method using a composition containing a solvent is preferred because it is preferable that the objects have fluidity and the objects are closer to each other at the time of drying in order to more strongly express the adhesive force due to the capillary force of the non-volatile liquid.

In order to achieve high adhesive strength, in the method of adhering the first object of the present invention to the second object, or the method of adhering the first object to the second object and the third object, It is preferable to use a plurality of first objects. In addition, when the second object and the third object also have points having a radius of curvature of 1 μm or less, it is more preferable to use a plurality of second objects and a plurality of third objects. Preferred embodiments include, for example, the following methods (5) to (8).

(5) After preparing a dispersion by mixing a plurality of first objects, a non-volatile liquid and a solvent, the dispersion is brought into contact with the second object, and the dispersion in contact with the second object Remove solvent from solution. (6) After preparing a dispersion by mixing a plurality of first objects, a non-volatile liquid and a solvent, the dispersion is brought into contact with the second object and the third object, and the second object and the second object 3. Remove the solvent from the dispersion in contact with the object.

(7) A plurality of first objects, a plurality of second objects, a non-volatile liquid, and a solvent are mixed to prepare a dispersion, and then the solvent is removed.

(8) After mixing a plurality of first objects, a plurality of second objects, a plurality of third objects, a non-volatile liquid, and a solvent to prepare a dispersion, the solvent is removed.

When a plurality of first objects having a radius of curvature of 1 _μm or less are particles having a width in the particle size distribution, or a particle having a radius of curvature of 1 m or less is a plurality of second objects. Or, when using as a plurality of third objects, if the particle size distribution of these particles is wide, it is considered that each object aggregates to reduce the points with a radius of curvature of 1 m or less.

Therefore, in order to develop a high adhesive force, the average particle size in the particle size distribution is preferably 1 μm or less. Further, the cumulative 10% diameter in the particle size distribution is preferably 1 μm or less.

The solvent used for the preparation of the dispersion used in the method of the present invention may be any solvent that is compatible with the non-volatile liquid, such as water, methanol, n-butanol, isopylpill alcohole, ethylene glycolate, n-Propyl cellosonolev, dimethinorea cetoamide, methyl ethyl ketone, methyl isobutyl ketone, xylene, propylene glycol monomono methino acetate, propylene glycol mono metholeate / layer can be used, preferably with water is there. The content of the solvent in the dispersion may be an amount that can flow the first object, the second object, and the third object, and the proportion of the solvent in the dispersion is usually 30% by weight. . /. ~ 99% by weight. The first object, the second object, and the third object may be subjected to surface treatment in order to improve the dispersibility in the solvent.

The dispersion containing the plurality of first objects, the non-volatile liquid, and the solvent in the present invention is dried to remove the solvent between the first object and the second object, and the first object and An adhesion function is developed between the third object and, in some cases, between the second object and the third object. In the method of the present invention, the solvent is usually removed from the dispersion by heating the dispersion and evaporating the solvent. When the solvent is removed by this method, the heating temperature may be a temperature at which the solvent evaporates.

The dispersion liquid of the present invention may be coated on a substrate to form a dispersion liquid film. The substrate can be the second object described above, or it can be the third object described above. To apply the dispersion onto the substrate, use a handy film applicator. A known coating apparatus such as a bar coater or a die coater can be used. As the base material, a known plastic film or sheet, glass, metal film or sheet having an appropriate mechanical rigidity in accordance with the application of the product can be used. Specific examples of plastic films or sheets include polyethylene terephthalate, polyethylene, polypropylene, cellophane, triacetyl cellulose, diacetyl / resenorelose, acetylenoresenorelose butyrate, poly (methyl methacrylate), etc. Or a sheet | seat can be mentioned. Specific examples of the metal film or sheet include aluminum foil and copper foil. The base material of the present invention can also be a film-like current collector formed of aluminum or the like used in an electric double layer capacitor.

The dispersion liquid of the present invention can be prepared as a paste, and after the paste is extruded into a thread or sheet, it is dried to remove the solvent, thereby forming a thread or sheet. According to the method of the present invention, a high-strength yarn or sheet can be formed. Example

Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples.

The main materials used are as follows.

[Non-volatile liquid]

An ionic liquid manufactured by Merck & Co., Inc. 1-Ethyl 1-methylimidazole

[First object]

(1) Silica particles (Colloidal silica "Snowtex P S-S" (trade name) manufactured by Nissan Chemical Industries, Ltd.); radius of curvature: 0.0 0 5 to 0.0 0 9 μ ηι; average particle size 0

. 0 1 0~ 0. 0 1 8 m; solid concentration of the colloidal silica: 2 0 Weight ^_0/0).

(2) Silica particles (colloidal silica “Snowtex ST-XS” (trade name) manufactured by Nissan Chemical Industries, Ltd.); radius of curvature 0.02 to 0.03 / m; average particle size 0.0 0 4 to 0.06 μm; solid content concentration of colloidal silica: 20 wt./.) Was used.

(3) Silica particles (Nippon Shokubai Co., Ltd. powdered silica “Seahoster KEP 100” (trade name); radius of curvature 0.4 8 5 to 0.6 1 5 μm; average particle size 0.95 ~ 1.2 5 μm)

[Second object] (1) Activated carbon manufactured by Kuraray Chemical Co., Ltd. RP-1 15 was pulverized in a ball mill for 24 hours using a Zircoyu ball. When the dispersion liquid prepared by dispersing activated carbon after pulverization in water was analyzed using a laser diffraction Z-scattering particle size distribution analyzer (HOR I BA LA 9 1 0), the activated carbon particle size was 5 / xm. Therefore, the radius of curvature was 2.5 / xm.

(2) Lithium cobalt oxide “CELLSEED C-5H” (trade name) manufactured by Nippon Chemical Co., Ltd. (average particle diameter D a: 6.6 X m).

[Third object]

Acetylene black particles (curvature radius: 0.018 / im; average particle size 0.03 6 μm; 50% pressed product) manufactured by Denki Kagaku Kogyo Co., Ltd. were used.

[Measurement of film density]

The film obtained by using activated carbon was cut into a size of 1.5 cm x 2. O cm in a state of being laminated with a current collector, and the weight and film thickness of the cut piece were measured. The weight and film thickness of the film were determined by subtracting the weight and film thickness of the current collector from the weight and film thickness of the cut piece, respectively. Using this result, the density of the film was determined. For the film obtained using lithium cobaltate, the density of the film was determined in the same manner as described above except that the size of the cut piece was changed to 3.0 cm x 3. O cm. Example 1

Activated carbon (second object) 1 6. O g of acetylene black (third object) 2. 0 _g colloidal silica (the first object; Snowtex PS- S) of 4 0. O g was added pressure, A non-volatile liquid (0.6 g) was added, and pure water was further added to prepare a slurry having a solid concentration of 30% by weight. The slurry consists of activated carbon (second object) 1 6. O g, acetylene black (third object) 2.0 g, silica (first object) 8.0 g, non-volatile liquid 0.6 g Contained. That is, the amount of the first object per 1 part by weight of the non-volatile liquid was 13.3 parts by weight. The composition of the slurry is shown in Table 1. The slurry was applied on a 20 μm thick aluminum foil (current collector) using a handy film applicator to form a dispersion film. Thereafter, the aluminum foil with the dispersion film was heated at 60 ° C. for 1 hour and further at 240 ° C. for 6 hours to remove water, thereby obtaining a laminate in which the film was laminated on the aluminum foil. The density of the obtained film was measured, and the results are shown in Table 2. Example 2

Dispersion as in Example 1 except that the amount of non-volatile liquid was changed to 0.4 g. Was prepared. The composition of the dispersion is shown in Table 1. Next, a laminate was prepared in the same manner as in Example 1, the film density was measured, and the results are shown in Table 2. Example 3

A dispersion was prepared in the same manner as in Example 1 except that the amount of the nonvolatile liquid was changed to 0.2 g. The composition of the dispersion is shown in Table 1. Next, a laminate was prepared in the same manner as in Example 1, the film density was measured, and the results are shown in Table 2. Example 4

A dispersion was prepared in the same manner as in Example 1 except that the amount of the nonvolatile liquid was changed to 0.1 g. The composition of the dispersion is shown in Table 1. Next, a laminate was prepared in the same manner as in Example 1, the film density was measured, and the results are shown in Table 2. Comparative Example 1

Table 1 shows the composition of the used dispersion prepared by preparing a dispersion in the same manner as in Example 1 except that the non-volatile liquid was not added. Next, a laminate was prepared in the same manner as in Example 1, the density of the film was measured, and the results are shown in Table 2. Example 5

Lithium cobaltate (second object) 9. O g and acetylene black (third object) 0.7 g powdered silica (first object) Add lg, add pure water, solid content 50 wt. A / ₀ slurry was prepared. The slurry consists of lithium cobaltate (second object) 9.0 g, acetylene black (third object) 0.7 g, silica (first object) 0.6 g, non-volatile liquid Contained 0.1 g. That is, the amount of the first object per 1 part by weight of the nonvolatile liquid was 90 parts by weight. The composition of the slurry is shown in Table 3. The slurry was applied onto an aluminum foil (current collector) having a thickness of 2 Ομιη using a handy film applicator to form a dispersion film. Thereafter, the aluminum foil with the dispersion film is heated at 60 ° C. for 1 hour and further at 150 ° C. for 6 hours to remove water, whereby a laminate in which the film is laminated on the aluminum foil is obtained. Obtained. The density of the obtained film was measured, and the results are shown in Table 4. Example 6

Powdered silica (first object) instead of 0.6 g colloidal silica (first A slurry was prepared in the same manner as in Example 5 except that 6.0 g of Snowtex p S—S) was used. The slurry consists of lithium cobaltate (second body) 9. O g, acetylene black (third body) 0.7 g, silica (first body) 0.6 g, non-volatile liquid 0. lg Contained. That is, the amount of the first object per 1 part by weight of the non-volatile liquid was 90 parts by weight. The composition of the slurry is shown in Table 3. Further, after obtaining a laminate in the same manner as in Example 5, the density of the obtained film was measured, and the results are shown in Table 4. Example 7

Powdered silica (first object) Prepare slurry in the same manner as Example 5 except that 6.0 g was used instead of colloidal silica (first object; Snowtex ST-XS). did. The slurry consists of lithium cobaltate (second object) 9.0 g, acetylene black (third object) 0.7 g, silica (first object) 0.6 g, non-volatile liquid 0.1 g Contained. That is, the amount of the first object per 1 part by weight of the non-volatile liquid was 90 parts by weight. The composition of the slurry is shown in Table 3. Also, after obtaining a laminate in the same manner as in Example 5, the density of the obtained film was measured, and the results are shown in Table 4. Comparative Example 2

Lithium cobaltate (second object) 3 6. O g and acetylene black (third object) 2. Add 8 g of colloidal silica (first object; SNOWTEX PS-S) 2 4. O g Furthermore, pure water is added, and the solid content concentration is 50 wt. A / ₀ slurry was prepared. A non-volatile liquid was not used. The slurry contained 36.0 g of lithium cobaltate (second body), 2.8 g of acetylene black (third body), and 2.4 g of silica (first body). The composition of the slurry is shown in Table 3. The slurry was applied onto an aluminum foil (current collector) having a thickness of 20 / m using a handy film applicator to form a dispersion film. Thereafter, the aluminum foil with the dispersion film is heated at 60 ° C. for 1 hour, and further at 150 ° C. for 6 hours to remove water, whereby the dispersion film is laminated on the aluminum foil. Got the body. The density of the obtained film was measured, and the results are shown in Table 4. [table 1 ]

[Table 2]

[Table 3]

[Table 4]

Industrial applicability

According to the method of the present invention, an object can be bonded with high adhesive force with excellent operability. Furthermore, high cohesive force acts between the bonded objects. The bonded objects can be brought closer to each other, and as a result, the packing density of the object assembly can be improved.

Claims

The scope of the claims

[1] A method of bonding a first object having at least one point having a radius of curvature of 1 μm or less to a second object with a non-volatile liquid, wherein the radius of curvature of the first object is 1 positioning the non-volatile liquid between a region containing at least one point that is less than or equal to μm and the second object.

[2] The method according to item 1, wherein the first object is a particle having a particle size of 1 / Z m or less.

[3] A step of preparing a dispersion by mixing the non-volatile liquid, a solvent, and a plurality of objects each of which is the first object;

Contacting the dispersion with the second object;

The method according to claim 2, further comprising: removing the solvent from the dispersion in contact with the second object.

[4] The method further includes the step of bringing the dispersion in contact with the second object or the dispersion to be in contact with the second object into contact with the third object, and removing the solvent. The method according to claim 3, wherein the step is performed in a state where the dispersion is also in contact with the third object.

[5] A step of preparing a dispersion by mixing the non-volatile liquid, a solvent, a plurality of objects each of which is the first object, and a plurality of objects each of which is a second object; Removing the solvent from the dispersion;

The method of claim 2 comprising:

[6] The non-volatile liquid, the solvent, a plurality of objects each of which is the first object, a plurality of objects each of which is a second object, and another plurality of objects are mixed. A step of preparing a dispersion;

Removing the solvent from the dispersion;

The method of claim 2 comprising: