CN105428575A - Preparation method for plasma-induced grafting acrylic acid modified nickel-metal hydride battery diaphragm paper - Google Patents
Preparation method for plasma-induced grafting acrylic acid modified nickel-metal hydride battery diaphragm paper Download PDFInfo
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- CN105428575A CN105428575A CN201510877869.9A CN201510877869A CN105428575A CN 105428575 A CN105428575 A CN 105428575A CN 201510877869 A CN201510877869 A CN 201510877869A CN 105428575 A CN105428575 A CN 105428575A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a preparation method for a plasma-induced grafting acrylic acid modified nickel-metal hydride battery diaphragm paper. The preparation method comprises the steps of using high density polyethylene-polypropylene skin core layer fibers (HDPE/PP) and polypropylene fibers (PP) for matching, adopting a wet paper-making and forming method and a hot melting and grinding step to prepare the diaphragm paper base; and then prepparing the hydrophilic diaphragm paper from the diaphragm paper base and sub-atmospheric pressure glow discharge plasma-induced grafting acrylic acid monomer. The finished product diaphragm paper is excellent in water absorption and liquid retaining performance; the water absorption height is higher than 53mm, the alkali absorption height is higher than 60mm, the alkali absorption rate reaches more than 600% and the alkali loss is less than 1.0%; the preparation method for the diaphragm paper from the plasma-induced grafting acrylic acid is rapid in process, efficient, pollution-free, simple in operation, and resource-saving without modifying the excellent performance of the fiber base after treatment and without causing thermal decomposition and burn of the processed material; and meanwhile, the fibers are endowed with new characteristics.
Description
Technical field
The present invention relates to a kind of nickel-hydrogen battery separator forming method and modification technology, belong to battery diaphragm material and cell manufacturing techniques field.
Background technology
The kind of storage battery mainly contains lead acid accumulator, lithium battery and Ni-MH battery etc.Current, application prospect it is preferred that Ni-MH battery because it has, energy is large, specific power is high, high-multiplying power discharge, have extended cycle life, memory-less effect and the advantage such as pollution-free.Ni-MH battery, as a kind of high-tech product, is the substitute products of nickel-cadmium cell, and with its environmental protection, capacity is high, volume is little, cost is low and fail safe is good etc., and advantage enjoys consumers, requires also more and more higher to diaphragm paper properties of product simultaneously.Diaphragm paper is the requisite material of nickel-hydrogen secondary cell, after diaphragm paper Electolyte-absorptive, can prevent both positive and negative polarity in battery from directly contacting and produces electron conduction and form short circuit at inside battery.Therefore, diaphragm paper must have the double grading of the good conductor of ion and the insulator of electronics.The nineties in last century rises, domestic have the unit such as Tianjin papermaking research institute and Zhejiang Pu Rui scientific & technical corporation to begin one's study nickel-hydrogen battery separator paper, after 2000, there is Shilong Science-Technology Co., Ltd., Shanghai of the nickel-hydrogen battery separator paper of production plasma treatment, produce Changzhou Kang Jie battery material Co., Ltd of graft polypropylene nickel-hydrogen battery separator paper, produce the Suzhou Bei Ge new material Science and Technology Ltd. of modified polyolefin hydro carbons nickel-hydrogen battery separator paper, Henan Kegao Radiation Chemical Technology Co., Ltd. of production low-density ES nickel-hydrogen battery separator paper, and the enterprise such as Hangzhou group of Xinhua and Mudanjiang Hengfeng group.Through effort for many years, the exploitation of domestic nickel-hydrogen battery separator paper obtains remarkable breakthrough, and the performance of nickel-hydrogen battery separator paper is greatly improved.Freudenberg, Germany, Japanese Vilene company, Pall company of the U.S., Hollingsworth & Vose company and SCIMA company of the U.S. are the main raw manufacturers of nickel-hydrogen battery separator paper, in occupation of ni-mh diaphragm paper major part market, this few company relates to product sulfonated membrane paper, plasma treatment diaphragm paper, chemical method graft acrylic acid and radiation method grafting diaphragm paper etc.
Produce the raw material of Ni-MH battery and be mainly two large class chemical fibres: polyethylene (PE) and polypropylene (PP) or both composite fibre.But polyolefin fibrids itself does not have water absorption, need row hydrophilicity-imparting treatment, hydrophilic treatment method has sulfonation process, plasma treatment, fluorination treatment, grafting process, corona treatment and interpolation surfactant etc., and the membrane properties that various processing mode obtains is different.The hydrophilic modifying study hotspot of current nickel-hydrogen battery separator paper is plasma treatment and monomer graft modification conbined usage, radiation treatment and monomer graft modification conbined usage.The equipment requirement of sulfonation hydrophilic modifying to reaction is high, and spent acid is difficult.Fluorination treatment and corona treatment are eliminated gradually.
Plasma is made up of the gaseous conductor ionized, comprising six kinds of typical particles, i.e. and the atom of the atom of electronics, cation, anion, excitation state or molecule, ground state or molecule and photon.Low temperature plasma can be obtained by modes such as glow discharge, corona discharge and radio frequency discharges in laboratory.There is in low temperature plasma enough high-octane active particle make reactant molecule free radical, oxidation, etching, cracking, be cross-linked, there is unique superiority in macromolecule material surface modification.Lower temperature plasma technology has achieved the Study and appliance in textile industry, special fibre material and paper pulp papermaking field, and demonstrates its advantage gradually.Sub-atmospheric pressure glow discharge technique is ripe and be applied to, in industrialized production, can processing various material, and cost time atmosphere content that is short, that add various gas that is low, process is high, power density is large, treatment effeciency is high.
The plasma treatment that NKK company of Japan and Mitsubishi Zhi Ye Co., Ltd. produce has very large advantage with acrylic acid-grafted nickel-hydrogen battery separator paper.Although domestic Laizhou Lianyoujinhao Novel Material Co., Ltd. sells the nickel-hydrogen battery separator paper of plasma treatment, plasma treatment technique remains Japanese.Suzhou Bei Ge new material Science and Technology Ltd. develops the vanguard technology of the vacuum plasma process of grafting sulfonic groups group, the diaphragm paper performance produced is better than pure sulfonated membrane paper, existing high-performance nickel-hydrogen battery separator paper BG5512, BG5815, BG6018 and BG7022 series.
Summary of the invention
The object of this invention is to provide the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft, the diaphragm paper that the method is produced has protects the features such as fluidity is high, electric charge conservation rate is high, dimensionally stable, alkali loss are little.
To achieve these goals, the present invention causes diaphragm paper primary surface by plasma and produces free radical, and the method that grafting contains acrylic monomer improves barrier film paper substrate hydrophilicity and water retainability, mainly comprises following two large steps:
One, be the preparation of barrier film paper substrate: the raw material that diaphragm paper is selected is that 40 ~ 80%(is in mass fraction) high density polyethylene (HDPE)-polypropylene fibre (HDPE/PP) and 20 ~ 60%PP fiber.Fibrous raw material dilution after mixing, to discongest and slurry is made in dispersion, to manufacture paper with pulp shapings through wet method, then roll and make diaphragm paper through dehydration, heated-air drying, hot melt with pressure-sizing modification.
The fiber number of the HDPE/PP fiber described in is 0.8 ~ 1.2dtex, and length is 4 ~ 8mm; The fiber number of PP fiber is 0.6 ~ 1.0dtex, and length is 4 ~ 8mm.
The hot melt condition of rolling of the paper substrate of barrier film described in is temperature 120 ~ 133 DEG C, surface pressure 1.0kg/cm
2~ 3.0kg/cm
2.
The paper substrate of barrier film described in is quantitatively 50g/cm
2, thickness is 110 ~ 130 μm, and air permeability is 40 ~ 45mm/s, and tensile strength is 2.0 ~ 2.2kN/m, and percentage elongation is 12 ~ 15%.
Two, plasma Inducing Graft acrylic acid diaphragm paper, comprises following two kinds of modes:
Mode one, first, barrier film paper substrate processes in sub-atmospheric pressure glow discharge plasma device, and condition is processing power 500 ~ 600W, vacuum degree 1400 ~ 1600kPa, processing time 3-8min, air atmosphere.Then barrier film paper substrate is put into rapidly graft copolymer solution grafting 1 ~ 2h, after taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 50 ~ 80 DEG C.
Mode two, barrier film paper substrate first put into graft copolymer solution grafting 1 ~ 2h, put into again in sub-atmospheric pressure glow discharge plasma device and carry out the copolyreaction of free radical initiation grafting, treatment conditions: processing power 500 ~ 600W, vacuum degree is 1400 ~ 1600kPa, processing time 3-8min, air atmosphere.After taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 50 ~ 80 DEG C.
Graft copolymer solution described in mode one and two is acrylic acid-ethanolic solution, and volume fraction is 30 ~ 60%.
Plasma device used in the present invention is sub-atmospheric pressure glow discharge plasma, because its portability and fail safe are widely used in laboratory research and application, but for the present invention, other plasma device as: as long as the low-temperature plasma device of atmospheric plasma, corona discharge and radio frequency discharge its can produce low temperature plasma all can as plasma producing apparatus of the present invention.
Nickel-hydrogen battery separator paper prepared by the present invention has excellent water absorption and water retainability, and suction head is higher than 53mm, and inhale alkali height higher than 60mm, alkali absorbing rate reaches more than 600%, and alkali loss is less than 1.0%.
The present invention, compared with nickel-hydrogen battery separator preparation method, has following advantage:
(1) process of sub-atmospheric pressure glow discharge plasma is that one is completely dry, gas-solid coherent method processing mode, fast, efficient, pollution-free, the simple to operate and saving energy, the premium properties of fibrous matrix is not changed after process, the materials pyrolysis of process can not be made and burn, giving fiber new characteristic simultaneously.
(2) plasma grafting treatment technology can improve wetting property, the reduction surface resistance that nickel-hydrogen battery separator paper changes, and does not damage diaphragm paper intensity simultaneously.
Embodiment
In order to understand the present invention better, illustrate content of the present invention further below in conjunction with embodiment, but the scope of protection of present invention is not limited thereto.
Embodiment 1:
A preparation method for the acrylic acid modified nickel-hydrogen battery separator paper of plasma Inducing Graft, its step is as follows:
(1) selection of raw material: 80%HDPE/PP fiber, fiber number 1.0dtex, length 5mm; 20%PP fiber, fiber number 1.0dtex, length 5mm.
(2) barrier film paper substrate wet method is hot-forming: will dilute after the mixing of two kinds of slurries in (1), discongest and slurry is made in dispersion, to manufacture paper with pulp shapings, then roll and make barrier film paper substrate through dehydration, heated-air drying, hot melt with pressure-sizing modification through paper machine.Wherein the hot melt condition of rolling is temperature 125 DEG C, surface pressure 3.0kg/cm
2.Barrier film paper substrate is quantitatively 50g/cm
2, thickness is 113 μm, and air permeability is 45mm/s, and tensile strength is 2.0kN/m, and percentage elongation is 12%.
(3) plasma Inducing Graft acrylic acid diaphragm paper: first by the barrier film paper substrate in (2) in sub-atmospheric pressure glow discharge plasma processing unit, treatment conditions: power 500W, vacuum degree 1400kPa, processing time 3min, air atmosphere.Then barrier film paper substrate is put into rapidly acrylic acid-ethanolic solution grafting 1.5h that volume fraction is 30%, after taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 80 DEG C.
Embodiment 2:
A preparation method for the acrylic acid modified nickel-hydrogen battery separator paper of plasma Inducing Graft, its step is as follows:
(1) selection of raw material: 60%HDPE/PP fiber, fiber number 1.0dtex, length 5mm; 40%PP fiber, fiber number 1.0dtex, length 5mm.
(2) barrier film paper substrate wet method is hot-forming: will dilute after the mixing of two kinds of slurries in (1), discongest and slurry is made in dispersion, manufacture paper with pulp into net, then roll and make barrier film paper substrate through dehydration, heated-air drying, hot melt with pressure-sizing modification through paper machine.Wherein the hot melt condition of rolling is temperature 130 DEG C, surface pressure 2.0kg/cm
2.Barrier film paper substrate is quantitatively 50g/cm
2, thickness is 110 μm, and air permeability is 43mm/s, and tensile strength is 2.1kN/m, and percentage elongation is 13%.
(3) plasma Inducing Graft acrylic acid diaphragm paper: first by the barrier film paper substrate in (2) in sub-atmospheric pressure glow discharge plasma processing unit, treatment conditions: power 600W, vacuum degree 1500kPa, processing time 5min, air atmosphere.Then barrier film paper substrate being put into rapidly volume fraction is 40% acrylic acid-ethanolic solution grafting 1h, and after taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 70 DEG C.
Embodiment 3:
A preparation method for the acrylic acid modified nickel-hydrogen battery separator paper of plasma Inducing Graft, its step is as follows:
(1) selection of raw material: 50%HDPE/PP fiber, fiber number 1.0dtex, length 5mm; 50%PP fiber, fiber number 1.0dtex, length 5mm.
(2) barrier film paper substrate wet method is hot-forming: will dilute after the mixing of two kinds of slurries in (1), discongest and slurry is made in dispersion, to manufacture paper with pulp shapings, then roll and make barrier film paper substrate through dehydration, heated-air drying, hot melt with pressure-sizing modification through wet method paper machine.Wherein the hot melt condition of rolling is temperature 133 DEG C, surface pressure 1.0kg/cm
2.Barrier film paper substrate is quantitatively 50g/cm
2, thickness is 115 μm, and air permeability is 40mm/s, and tensile strength is 2.2kN/m, and percentage elongation is 15%.
(3) plasma Inducing Graft acrylic acid diaphragm paper: be first grafting 2h in 50% acrylic acid-ethanolic solution by the barrier film paper substrate in (2) in volume fraction, put into again and process in sub-atmospheric pressure glow discharge plasma device, treatment conditions: processing power 550W, vacuum degree 1600kPa, processing time 8min, air atmosphere.After taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 60 DEG C.
The sample of embodiment 1,2,3 and sulfonate graft process diaphragm paper, chemical graft process diaphragm paper, radiation grafting process diaphragm paper are carried out performance comparison, specifically in table 1.
The performance of table 1 nickel-hydrogen battery separator paper
The data explanation of table 1, when diaphragm paper is quantitatively close, the tensile strength of the diaphragm paper of embodiment 1,2,3 is close to the tensile strength of sulfonate graft process diaphragm paper, chemical graft process diaphragm paper and radiation grafting process diaphragm paper, and the tensile strength of sample can meet Ni-MH battery manufacturing technique requirent.
The alkali absorbing rate of the diaphragm paper of embodiment 1,2,3, inhale alkali height and ion exchange capacity higher than sulfonate graft process diaphragm paper, chemical graft process diaphragm paper and radiation grafting process diaphragm paper, the size of alkali absorbing rate embodies the ability of diaphragm paper carrying electrolyte, higher alkali absorbing rate can introduce enough ionic conduction electrolyte between the positive/negative plate of battery, ensures the normal work running of battery.Inhale alkali height and embody battery separator paper Electolyte-absorptive speed speed, the page with higher suction alkali height is the precondition of carrying out high speed battery production.The size of ion exchange capacity embodies the passage that ion exchanges fast, to form circulation circuit in battery.
The alkali loss rate of the diaphragm paper of embodiment 1,2,3 and air permeability are lower than sulfonate graft process diaphragm paper, chemical graft process diaphragm paper and radiation grafting process diaphragm paper.The alkali loss rate conference of nickel-hydrogen battery separator paper affects air permeability and the strength character of diaphragm paper, finally causes the series of problems such as the attenuating of battery short circuit, discharge voltage and reduction in useful life.
Diaphragm paper excellent performance prepared by embodiment 1,2,3 can be found out.
Above-described embodiment, only in order to the present invention to be described but to be not limited thereto, should be appreciated that the method that can also have a lot of accommodation and replacement in the scope not departing from invention.
Claims (8)
1. a preparation method for the acrylic acid modified nickel-hydrogen battery separator paper of plasma Inducing Graft, is characterized in that, comprise the steps:
(1) fibrous raw material: in mass fraction, uses the high density polyethylene (HDPE)-polypropylene fibre (HDPE/PP) of 40 ~ 80% and the polypropylene fibre (PP) of 20 ~ 60% to carry out proportioning;
(2) wet method is hot-forming: fibrous raw material is diluted, to be discongested and slurry is made in dispersion, to manufacture paper with pulp shapings, then roll and make barrier film paper substrate through dehydration, heated-air drying, hot melt with pressure-sizing modification through wet method;
(3) plasma Inducing Graft is acrylic acid modified: mode one: after barrier film paper substrate processes in sub-atmospheric pressure glow discharge plasma device, place it in grafting 1 ~ 2h in graft copolymer solution, after taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 50 ~ 80 DEG C; Or mode two: barrier film paper substrate is grafting 1 ~ 2h in graft copolymer solution first, then put in sub-atmospheric pressure glow discharge plasma device and carry out the copolyreaction of free radical initiation grafting; After taking out, clear water is cleaned, and dries, make hydrophilic diaphragm paper at 50 ~ 80 DEG C; Wherein, the treatment conditions of plasma device: power 500 ~ 600W, air pressure 1400 ~ 1600kPa, time 3 ~ 8min, air atmosphere.
2. the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to claim 1, it is characterized in that described step (1) medium high density polyethylene-polypropylene fibre is core-skin layer core sheath fiber, cortex is high density polyethylene (HDPE) (HDPE), sandwich layer is polypropylene (PP), fiber number 0.8 ~ 1.2dtex, length 4 ~ 8mm, cortex fusing point 130 DEG C, sandwich layer fusing point 164 DEG C.
3. the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to claim 1, is characterized in that polypropylene fibre (PP) fiber number 0.6 ~ 1.0dtex, length 4 ~ 8mm in described step (1), fusing point 164 DEG C.
4. the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to claim 1, it is characterized in that described step (2) the hot melt condition of rolling is temperature 120 ~ 133 DEG C, surface pressure is 1.0kg/cm2 ~ 3.0kg/cm2.
5. the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to claim 1, is characterized in that the barrier film paper substrate prepared in described step (2) is quantitatively 50g/cm
2, thickness is 110 ~ 130 μm, and air permeability is 40 ~ 45mm/s, and tensile strength is 2.0 ~ 2.2kN/m, and percentage elongation is 12 ~ 15%.
6. the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to claim 1, it is characterized in that the graft copolymer solution in described step (3) is acrylic acid-ethanolic solution, volume fraction is 30 ~ 60%.
7. the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to any one of claim 1 ~ 6, it is characterized in that the nickel-hydrogen battery separator paper prepared has excellent water absorption and water retainability, suction head is higher than 53mm, inhale alkali height higher than 60mm, alkali absorbing rate reaches more than 600%, and alkali loss is less than 1.0%.
8. the nickel-hydrogen battery separator paper that the preparation method of the acrylic acid modified nickel-hydrogen battery separator paper of a kind of plasma Inducing Graft according to any one of claim 1 ~ 7 prepares.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106229450A (en) * | 2016-09-29 | 2016-12-14 | 河南科高辐射化工科技有限公司 | A kind of high-capacity nickel-hydrogen battery barrier film |
| CN106784553A (en) * | 2016-12-27 | 2017-05-31 | 深圳中兴创新材料技术有限公司 | The preparation method of ceramic coating MIcroporous polyolefin film, MIcroporous polyolefin film and application |
| CN107988654A (en) * | 2017-12-19 | 2018-05-04 | 广东蒙泰高新纤维股份有限公司 | A kind of high intensity PE-PP two-components skin-core structure bicomponent filament yarn and preparation method thereof |
| CN109709000A (en) * | 2018-12-28 | 2019-05-03 | 河北金力新能源科技股份有限公司 | Diaphragm infiltrates system safety testing device and method |
| CN114892400A (en) * | 2021-11-01 | 2022-08-12 | 中国电力科学研究院有限公司 | Material surface treatment device and method |
| CN115241598A (en) * | 2021-04-23 | 2022-10-25 | 四川大学 | Coating composite diaphragm and preparation method thereof |
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| CN105098128A (en) * | 2015-09-18 | 2015-11-25 | 河南科高辐射化工科技有限公司 | Composite membrane for secondary nickel-zinc cell and preparation method of composite membrane |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106229450A (en) * | 2016-09-29 | 2016-12-14 | 河南科高辐射化工科技有限公司 | A kind of high-capacity nickel-hydrogen battery barrier film |
| CN106229450B (en) * | 2016-09-29 | 2020-04-10 | 河南科高辐射化工科技有限公司 | Diaphragm suitable for sealed high-power nickel-metal hydride battery |
| CN106784553A (en) * | 2016-12-27 | 2017-05-31 | 深圳中兴创新材料技术有限公司 | The preparation method of ceramic coating MIcroporous polyolefin film, MIcroporous polyolefin film and application |
| CN106784553B (en) * | 2016-12-27 | 2020-01-21 | 深圳中兴新材技术股份有限公司 | Preparation method of polyolefin microporous membrane with ceramic coating, polyolefin microporous membrane and application |
| CN107988654A (en) * | 2017-12-19 | 2018-05-04 | 广东蒙泰高新纤维股份有限公司 | A kind of high intensity PE-PP two-components skin-core structure bicomponent filament yarn and preparation method thereof |
| CN107988654B (en) * | 2017-12-19 | 2020-08-04 | 广东蒙泰高新纤维股份有限公司 | High-strength PE-PP double-component sheath-core structure composite filament and preparation method thereof |
| CN109709000A (en) * | 2018-12-28 | 2019-05-03 | 河北金力新能源科技股份有限公司 | Diaphragm infiltrates system safety testing device and method |
| CN115241598A (en) * | 2021-04-23 | 2022-10-25 | 四川大学 | Coating composite diaphragm and preparation method thereof |
| CN114892400A (en) * | 2021-11-01 | 2022-08-12 | 中国电力科学研究院有限公司 | Material surface treatment device and method |
| CN114892400B (en) * | 2021-11-01 | 2023-12-26 | 中国电力科学研究院有限公司 | Material surface treatment device and method |
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