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Polyolefin-space mesh-shaped nano microporous membrane and preparation method thereof

A nano-micropore and polyolefin technology, which is applied in the direction of electrical components, circuits, battery components, etc., can solve problems that are difficult to meet high-end biochemical technology

Inactive Publication Date: 2012-05-02
XINXIANG ZHONGKE SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All kinds of microporous membranes that can be produced on a large scale in China are basically micron-level membranes. If the pore size is too large, it will be difficult to meet the needs of high-end biochemical technology. good base film material

Method used

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  • Polyolefin-space mesh-shaped nano microporous membrane and preparation method thereof
  • Polyolefin-space mesh-shaped nano microporous membrane and preparation method thereof
  • Polyolefin-space mesh-shaped nano microporous membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) Polypropylene and polyethylene resin are mixed in a weight ratio of 5:1 by polypropylene and polyethylene resin, and then poly-1-butene is mixed with 0.01% of the blend weight of polypropylene and polyethylene resin Add in the blended material; add N-methylol acrylamide into the blended material by 0.01% of the weight of the above-mentioned polypropylene and polyethylene resin blended material; by 1% by weight of the above-mentioned polypropylene and polyethylene resin blended material Add the mineral oil in the blended material; add 0.5% calcium oxide in the blended material according to the weight of the above-mentioned polypropylene and polyethylene resin blended material; Calcium dioxate is added to the mixture, mixed evenly with the above-mentioned blend, melted at 200°C, and pelletized through a twin-screw extruder, and then dried and dust-removed.

[0012] (2) Melt and extrude the above-mentioned pellets at 190-210°C, and the flat film extruded under a consta...

Embodiment 2

[0015] (1) Polypropylene and polyethylene resin are mixed in a weight ratio of 5:1 by polypropylene and polyethylene resin, and then poly-1-butene is mixed by 0.05% of the blend weight of polypropylene and polyethylene resin Add in the blended material; add N-methylolacrylamide in the blended material by 0.01% of the weight of the above-mentioned polypropylene and polyethylene resin blended material; press 0.6% by the weight of the above-mentioned polypropylene and polyethylene resin blended material Add the mineral oil in the blended material; add 0.5% silicon dioxide in the blended material according to the weight of the above-mentioned polypropylene and polyethylene resin blended material; Calcium adipate is added to the mixture, mixed evenly with the above blend, and then melted at 225°C to produce pellets through a twin-screw extruder, dried and dedusted.

[0016] (2) Melt and extrude the above-mentioned pellets at a temperature of 190 to 220°C, and the flat film extruded...

Embodiment 3

[0019] (1) Add poly-1-butene with a weight ratio of 0.05% to polypropylene; N-methylolacrylamide is added to the blend by 0.05% of the weight ratio of the above-mentioned polypropylene; Add 0.6% mineral oil to the blend; add 0.5% silicon dioxide to the blend according to the weight of the above polypropylene; add 0.01% calcium adipate to the blend according to the weight of the above polypropylene and mix evenly Melt at a temperature of 200°C to produce pellets through a twin-screw extruder, then dry and remove dust. After fully mixing, it is melted at 250°C and extruded by twin-screws to form pellets. The pellets should be dried and dust-removed.

[0020] (2) Melt and extrude the above-mentioned pellets at a temperature of 220 to 240°C, and the flat film extruded under a stable pressure is shaped with a casting roll at a certain temperature of 130°C, and the cooling time is 10 minutes to make the sheet fully oriented;

[0021] (3) The above-mentioned extruded flat film with...

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Abstract

The invention discloses a polyolefin-space mesh-shaped nano microporous membrane and a preparation method thereof. The polyolefin-space mesh-shaped nano microporous membrane contains polyolefin resin, a pore-type modifying agent, a lubricant, a toughing agent and a pore-space adjusting agent, wherein the pore diameter of the microporous membrane is 40-200nm; and nonlinear holes are arranged in pores. The preparation method comprises the following steps of: (1) uniformly mixing the polyolefin resin, the pore-type modifying agent, the lubricant, the toughing agent and the pore-space adjusting agent under the melting temperature; (2) carrying out hot-melting and extrusion on the mixed materials, and then cooling the mixed materials to prepare a flat membrane; and (3) carrying out longitudinal drawing and horizontal drawing on the flat membrane and then carrying out heat setting to prepare the polyolefin-space mesh-shaped nano microporous membrane. The polyolefin-space mesh-shaped nano microporous membrane is mainly used as a lithium battery diaphragm and can also be used as a filtering membrane for filtering.

Description

Technical field: [0001] The invention relates to a battery separator, in particular to a polyolefin space network nano-microporous membrane and a preparation method thereof. Background technique: [0002] With the development of society, there are more and more demands for various films, especially polyolefin microporous membranes with good acid and alkali resistance, among which polyolefin microporous membranes as a key component in lithium-ion batteries can play a role The role of isolating the positive and negative electrodes can also play an important role in ion conduction. Lithium-ion batteries have become a new generation of batteries widely used due to their advantages of high voltage, high specific energy, long cycle life and no pollution to the environment. In addition, due to the pollution of the environment and the development of biomedicine, the basement membrane filtration products with nano-microporous structure have also obtained a broad application space. ...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/06C08L23/20C08L27/16C08K3/22C08K5/20C08K5/098C08K3/36B29C69/02B29C47/00B29C47/92B29C55/14H01M2/18B29C48/92
CPCY02E60/12Y02E60/10
Inventor 庞景森荆正军
Owner XINXIANG ZHONGKE SCI&TECH