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Crosslinking polyolefin microporous membrane and preparation method thereof

A polyolefin microporous membrane, cross-linked technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of poor tolerance to strong alkali and chlorine-oxygen compounds, etc., and achieve outstanding mechanical strength , Improve mechanical strength and prolong service life

Active Publication Date: 2011-07-27
HANGZHOU FUMO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyolefin materials have good resistance to general chemicals, but moderate to poor resistance to strong alkalis and oxychlorides

Method used

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  • Crosslinking polyolefin microporous membrane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In embodiment 1, used polyolefin is high-density polyethylene, latent solvent is naphtha, peroxygen compound is peroxygen compound Luperox 101, and silane is trimethoxyvinyl silane, and superfine filler is nanometer calcium carbonate, average The particle size is 0.05 microns. The raw material formula of embodiment 1 is as follows (by weight percentage):

[0052] HDPE 42.9%

[0053] Naphtha 30%

[0054] Peroxide compound Luperox 101 2%

[0055] Trimethoxyvinylsilane 5%

[0056] Antioxidant AO168 0.1%

[0057] Nano Calcium Carbonate 20%

Embodiment 2

[0058] In Example 2, the polyolefin used is long-chain branched polyethylene, the latent solvent is dioctyl adipate, the peroxide compound is peroxide compound Luperox TBEC, and the silane is trimethoxymethacrylate propyl silane, ultrafine The filler is ultrafine calcium carbonate with an average particle size of 0.1 microns. The raw material formula of embodiment 2 is as follows (by weight percentage):

[0059] Long chain branched polyethylene 35.9%

[0060] Dioctyl Adipate 40%

[0061] Luperox TBEC 1%

[0062] Trimethoxypropyl methacrylate 3%

[0063] Antioxidant AO168 0.1%

[0064] Superfine Calcium Carbonate 20%

Embodiment 3

[0065] In Example 3, the polyolefin used is a combination of high-density polyethylene and ultra-high molecular weight polyethylene, the latent solvent is liquid paraffin, the peroxide compound is peroxide compound Luperox 130, and the silane is triisopropoxysilane. The filler is ultrafine calcium carbonate with an average particle size of 1 micron. The raw material formula of embodiment 3 is as follows (by weight percentage):

[0066] HDPE 14.4%

[0067] UHMWPE 14.4%

[0068] Liquid Paraffin 50%

[0069] Peroxy compound Luperox 130 0.1%

[0070] Triisopropoxysilane 1%

[0071] Antioxidant AO168 0.1%

[0072] Superfine Calcium Carbonate 20%

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Abstract

The invention discloses a crosslinking polyolefin microporous membrane and a preparation method thereof. Materials for making the membrane mainly comprise 28.8 to 48.8 parts by weight of polyolefin, 30 to 50 parts by weight of cosolvent, 0.1 to 2 parts by weight of peralcohol, 1 to 5 parts by weight of silane, and 0.1 part by weight of antioxygen, and further comprise 0 to 20 parts by weight of ultrafine filler. By the crosslinking of polyolefin, the mechanical strength, the thermal resistance and the tolerance to strong base and chlorine-oxygen compound and other severe chemical environmentsof the polyolefin microporous membrane can be improved, and in practical application, such as an isolating membrane of a lithium ion battery or a filtering membrane in a membrane bioreactor, the service life of the polyolefin microporous membrane can be greatly prolonged.

Description

technical field [0001] The invention relates to a cross-linked polyolefin microporous membrane and a preparation method thereof. Background technique [0002] Polymer microporous membrane refers to a special polymer film that can form through micropores in the thickness direction of the film. Depending on the preparation method, the through-through of the micropores can be straight; but in most cases, the pores have a certain degree of tortuousness. According to different pore sizes, polymer microporous membranes can be divided into microfiltration membranes, ultrafiltration membranes and nanofiltration membranes. The pore size of the microfiltration membrane generally exceeds 0.1um, while the pore size of the nanofiltration membrane generally needs to be below 10nm, and the pore size of the ultrafiltration membrane is in between. Separation membranes such as reverse osmosis membranes, ion exchange membranes, and proton exchange membranes can also be regarded as microporou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08K5/14C08K5/5425C08J9/28C08J9/26C08J3/24H01M2/16B01D63/02B29B7/28B29C55/28
CPCY02E60/12Y02E60/10
Inventor 顾方明郑泓
Owner HANGZHOU FUMO NEW MATERIAL TECH
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