CN104479464A - Water-based bacterial cellulose paint for lithium battery diaphragms - Google Patents
Water-based bacterial cellulose paint for lithium battery diaphragms Download PDFInfo
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- CN104479464A CN104479464A CN201410734522.4A CN201410734522A CN104479464A CN 104479464 A CN104479464 A CN 104479464A CN 201410734522 A CN201410734522 A CN 201410734522A CN 104479464 A CN104479464 A CN 104479464A
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- water
- bacteria cellulose
- emulsion
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- 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
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/02—Cellulose; Modified cellulose
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- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Separators (AREA)
Abstract
The invention discloses a water-based bacterial cellulose paint for lithium battery diaphragms, which comprises the following components in percentage by weight: 50-65% of base material and 35-50% of water. The base material comprises the following components in parts by weight: 0.1-5 parts of high-polymer emulsion thickener, 0.1-5 parts of water-based dispersing agent, 0.1-5 parts of water-based wetting agent, 1-10 parts of water-based latex and 80-100 parts of bacterial cellulose. The water-based bacterial cellulose paint for lithium battery diaphragms has the advantages of stable system, favorable coatability and high solid content.
Description
Technical field
The present invention relates to lithium ion battery separator, especially relate to that a kind of stable system, coating performance are good, the water-based bacteria cellulose coating of the lithium battery diaphragm of high solids content.
Background technology
In lithium ion battery, the Main Function of barrier film is that the positive and negative electrode of battery is separated, and prevents the two poles of the earth from contacting and short circuit, is one of interior layer assembly of key.The performance of barrier film determines the interface structure, internal resistance etc. of battery, directly affects the characteristics such as the capacity of battery, circulation and safety performance, and the barrier film of excellent performance has important effect to the over-all properties improving lithium ion battery.
At present, the barrier film that lithium ion battery uses is generally Polyolefin-based porous film, because this Polyolefin-based porous film fusing point is lower than 200 DEG C, therefore there is following defect in them: when battery temperature raises because of inside or external factor, this barrier film can shrink or melting, makes the volume change of barrier film.The contraction of barrier film or melting can cause again the direct contact between positive pole and negative pole, cause battery short circuit, thus cause the generation of the mishaies such as cells burst blast.Therefore, in order to ensure the use safety of battery, a kind of barrier film that can not cause thermal contraction and heat fusing because of battery high-temperature must be provided.
In order to improve the thermostability of polyalkene diaphragm, strengthen the safety performance of lithium ion battery, a solution of industry is the organic or inorganic coating of single or double attachment at polyolefin film, forms organic/inorganic composite film.Because Inorganic Active has higher thermostability, therefore the thermal contraction of whole laminated film is suppressed greatly.
Summary of the invention
For overcoming above-mentioned shortcoming, the invention provides that a kind of stable system, coating performance are good, the water-based bacteria cellulose slurry of high solids content.
The object of the invention is to be realized by following technical measures, a kind of water-based bacteria cellulose coating of lithium battery diaphragm; Comprise the base-material 50-65% and water 35-50% that calculate according to weight percent; Wherein, described base-material comprise calculate according to weight quota macromolecule emulsion thickening material 0.1-5 part, aqueous dispersant 0.1-5 part, aqueous wetting agent 0.1-5 part, water based emulsion 1-10 part and bacteria cellulose 80-100 part.
As a kind of optimal way, described base-material comprise calculate according to weight quota caustic solubility macromolecule emulsion thickening material 0.5-3 part, aqueous dispersant 0.2-3 part, aqueous wetting agent 0.2-3 part, water based emulsion 2-8 part and bacteria cellulose 85-100 part.
As a kind of optimal way, described macromolecule emulsion thickening material is the composition of one or more in polyacrylate emulsion, polymethyl acrylic acid emulsion, poly-ethylacrylic acid emulsion, Polyacrylate Emulsion, polymethacrylate copolymer emulsion.
As a kind of optimal way, described aqueous dispersant is the composition of one or more in polyoxyethylene glycol (PEG), sodium polyacrylate (PAA-Na), polyacrylic acid potassium (PAA-K).
As a kind of optimal way, described aqueous wetting agent is the composition of one or more in alkylphenol polyoxyethylene, fatty alcohol-polyoxyethylene ether, aliphatic acid polyethenoxy ether, aliphatic amine polyoxyethylene ether.
As a kind of optimal way, described Aqueous Adhesives is the composition of one or more in polymethylmethacrylate, poly-n-butyl methacrylate, butadiene-styrene latex, styrene-acrylic latex, purified petroleum benzin latex, polyethyl acrylate, ethylene-vinyl acetate copolymer, polyvinyl acetate (PVA).Sizing agent preferred emulsion type sizing agent, if water soluble type, then after adding sizing agent, whole high solids content bacteria cellulose slurry system viscosity is excessive, and during coating, slurry flow leveling can decline.
As a kind of optimal way, described bacteria cellulose is the Mierocrystalline cellulose of acetobacter xylinum synthesis.
Advantage of the present invention and beneficial effect have: reduce energy consumption, and because solid content improves, moisture content reduces, and unit fine fungin coating barrier film drying cost reduces 10-20%; Improve efficiency, because the fusing point of polyolefin film own is low, when therefore adopting water-based bacteria cellulose slurry to be coated with, oven temperature can not be too high, for ensureing that moisture is dried restricted to surface covered, and higher surface covered when adopting high solids content bacteria cellulose slurry to be coated with, under same drying conditions, can be run, improve unit time coating barrier film production efficiency.
Embodiment
Below the present invention is described in further detail.
Below in conjunction with specific embodiment, content of the present invention is further illustrated, but invention protection domain of the present invention is not limited only to the content described by embodiment.
Embodiment 1
A kind of lithium ion battery high solid content water bacteria cellulose coating: comprise the composition 65% and water 50% that calculate according to weight percent; Wherein, described composition comprises the polyacrylate emulsion thickening material 5 parts, aqueous dispersant polyoxyethylene glycol 5 parts, aqueous wetting agent alkylphenol polyoxyethylene 5 parts, water based emulsion polymethylmethacrylate 10 parts and the D that calculate according to weight quota
50for 4um, the Mierocrystalline cellulose 80 parts of acetobacter xylinum synthesis.
The method of the high solid content water bacteria cellulose slurry described in preparation; Comprise following preparation process:
(1), by the deionized water of described amount first join in pre-stirred pot, regulate pH value 8-9, add the macromolecule emulsion thickening material polyacrylate emulsion of described amount, aqueous dispersant polyoxyethylene glycol, be stirred to and dissolve completely, obtain mixture I;
(2), add in said mixture I described amount acetobacter xylinum synthesis Mierocrystalline cellulose, stir and disperse after 30-60 minute, be dispersed in high speed dispersor and carry out, rotating speed 30m/min, obtain mixture II;
(3), in said mixture II, add water based emulsion polymethylmethacrylate, the aqueous wetting agent alkylphenol polyoxyethylene of described amount, low rate mixing evenly after, filter to obtain high solid content water bacteria cellulose slurry with 300 eye mesh screens;
Embodiment 2
A kind of lithium ion battery high solid content water bacteria cellulose coating: comprise the composition 55% and water 45% that calculate according to weight percent; Wherein, described composition comprises the polymethyl acrylic acid emulsion thickener 3 parts, aqueous dispersant sodium polyacrylate 0.2 part, aqueous wetting agent fatty alcohol-polyoxyethylene ether 0.2 part, water based emulsion poly-n-butyl methacrylate 2 parts and the D that calculate according to weight percent
50for 0.8um, the Mierocrystalline cellulose 100 parts of acetobacter xylinum synthesis.
Prepare the method for high solid content water bacteria cellulose slurry as embodiment 1, vicissitudinous is disperse rotating speed to be 60m/min.
Embodiment 3
A kind of lithium ion battery high solid content water bacteria cellulose coating: comprise the composition 60% and water 40% that calculate according to weight percent; Wherein, described composition comprises the Polyacrylate Emulsion thickening material 0.5 part, aqueous dispersant polyacrylic acid potassium 3 parts, aqueous wetting agent aliphatic acid polyethenoxy ether 1 part, water based emulsion polyethyl acrylate 8 parts and the D that calculate according to weight percent
50for 0.6um, the Mierocrystalline cellulose 85 parts of acetobacter xylinum synthesis.
Prepare the method for high solid content water bacteria cellulose slurry as embodiment 1, vicissitudinous is disperse rotating speed to be 40m/min.
Embodiment 4
A kind of lithium ion battery high solid content water bacteria cellulose coating: comprise the composition 50% and water 35% that calculate according to weight percent; Wherein, described composition comprises the polymethacrylate copolymer emulsion thickening material 1 part, aqueous dispersant sodium polyacrylate 2 parts, aqueous wetting agent aliphatic amine polyoxyethylene ether 3 parts, water based emulsion ethylene-vinyl acetate copolymer 5 parts and the D that calculate according to weight percent
50for 0.2um, the Mierocrystalline cellulose 90 parts of acetobacter xylinum synthesis.
Prepare the method for high solid content water bacteria cellulose slurry as embodiment 1, vicissitudinous is disperse rotating speed to be 50m/min.
Embodiment 5
A kind of lithium ion battery high solid content water bacteria cellulose coating: comprise the composition 62% and water 38% that calculate according to weight percent; Wherein, described composition comprises the Polyacrylate Emulsion thickening material 2 parts, aqueous dispersant polyacrylic acid potassium 0.5 part, aqueous wetting agent fatty alcohol-polyoxyethylene ether 2 parts, water based emulsion polyvinyl acetate (PVA) 6 parts and the D that calculate according to weight percent
50for 1um, the Mierocrystalline cellulose 95 parts of acetobacter xylinum synthesis.
Prepare the method for high solid content water bacteria cellulose slurry as embodiment 1, vicissitudinous is disperse rotating speed to be 55m/min.
Comparative example
A kind of lithium ion battery preparation method for coating: comprise the composition 50% and water 50% that calculate according to weight percent; Wherein, described composition comprises the cellulose thickener 3 parts, aqueous dispersant sodium polyacrylate 0.2 part, aqueous wetting agent fatty alcohol-polyoxyethylene ether 0.2 part, water based emulsion poly-n-butyl methacrylate 2 parts and the D that calculate according to weight percent
50for 0.8um, aluminium sesquioxide particle 100 parts.
Preparation method is as embodiment 1, and vicissitudinous is disperse rotating speed to be 60m/min.
Solid content, viscosity, coating performance, storage stability test are carried out to the bacteria cellulose slurry adopting embodiment 1-5 and comparative example to prepare, the results are shown in Table 1, not only solid content is high, viscosity is little for the lithium ion battery use bacteria cellulose slurry that test result shows to adopt Alkali-soluble acrylic thickening material to prepare, and coating performance is good, long quality-guarantee period.
Table 1
More than that the water-based bacteria cellulose coating of lithium battery diaphragm of the present invention is set forth; the present invention is understood for helping; but embodiments of the present invention are not restricted to the described embodiments; any do not deviate from the principle of the invention under do change, modification, substitute, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. a water-based bacteria cellulose coating for lithium battery diaphragm, is characterized in that: comprise the base-material 50-65% and water 35-50% that calculate according to weight percent; Wherein, described base-material comprise calculate according to weight quota macromolecule emulsion thickening material 0.1-5 part, aqueous dispersant 0.1-5 part, aqueous wetting agent 0.1-5 part, water based emulsion 1-10 part and bacteria cellulose 80-100 part.
2. water-based bacteria cellulose coating according to claim 1, is characterized in that: described base-material comprise calculate according to weight quota caustic solubility macromolecule emulsion thickening material 0.5-3 part, aqueous dispersant 0.2-3 part, aqueous wetting agent 0.2-3 part, water based emulsion 2-8 part and bacteria cellulose 85-100 part.
3. water-based bacteria cellulose coating according to claim 1 and 2, is characterized in that: described macromolecule emulsion thickening material is the combination of one or more in polyacrylate emulsion, polymethyl acrylic acid emulsion, poly-ethylacrylic acid emulsion, Polyacrylate Emulsion, polymethacrylate copolymer emulsion.
4. water-based bacteria cellulose coating according to claim 1 and 2, is characterized in that: described aqueous dispersant is the combination of one or more in polyoxyethylene glycol, sodium polyacrylate, polyacrylic acid potassium.
5. water-based bacteria cellulose coating according to claim 1 and 2, is characterized in that: described aqueous wetting agent is the combination of one or more in alkylphenol polyoxyethylene, fatty alcohol-polyoxyethylene ether, aliphatic acid polyethenoxy ether, aliphatic amine polyoxyethylene ether.
6. water-based bacteria cellulose coating according to claim 1 and 2, is characterized in that: described Aqueous Adhesives is the combination of one or more in polymethylmethacrylate, poly-n-butyl methacrylate, butadiene-styrene latex, styrene-acrylic latex, purified petroleum benzin latex, polyethyl acrylate, ethylene-vinyl acetate copolymer, polyvinyl acetate (PVA).
7. water-based bacteria cellulose coating according to claim 1 and 2, is characterized in that: described bacteria cellulose is the Mierocrystalline cellulose of acetobacter xylinum synthesis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734522.4A CN104479464A (en) | 2014-12-05 | 2014-12-05 | Water-based bacterial cellulose paint for lithium battery diaphragms |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410734522.4A CN104479464A (en) | 2014-12-05 | 2014-12-05 | Water-based bacterial cellulose paint for lithium battery diaphragms |
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| CN104479464A true CN104479464A (en) | 2015-04-01 |
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| CN201410734522.4A Pending CN104479464A (en) | 2014-12-05 | 2014-12-05 | Water-based bacterial cellulose paint for lithium battery diaphragms |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185939A (en) * | 2015-09-22 | 2015-12-23 | 武汉惠强新能源材料科技有限公司 | Lithium ion battery separator with low thermal shrinkage rate and preparation method therefor |
| CN106930140A (en) * | 2017-04-27 | 2017-07-07 | 北京观澜科技有限公司 | A kind of greaseproof and its production method |
-
2014
- 2014-12-05 CN CN201410734522.4A patent/CN104479464A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105185939A (en) * | 2015-09-22 | 2015-12-23 | 武汉惠强新能源材料科技有限公司 | Lithium ion battery separator with low thermal shrinkage rate and preparation method therefor |
| CN106930140A (en) * | 2017-04-27 | 2017-07-07 | 北京观澜科技有限公司 | A kind of greaseproof and its production method |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150401 |
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| WD01 | Invention patent application deemed withdrawn after publication |