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Process for preparing membranes

A group and composition technology, applied in the field of film making, can solve the problems of slow curing and energy consumption

Inactive Publication Date: 2011-06-15
FUJIFILM MFG EURO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Curing is slow and consumes significant energy

Method used

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  • Process for preparing membranes
  • Process for preparing membranes
  • Process for preparing membranes

Examples

Experimental program
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Effect test

example 1

[0159] A curable composition ("CC1") was prepared by mixing the ingredients shown in Table 1:

[0160] Table 1

[0161] Element

Content (wt%)

[0162] Ebecryl TM 3703

74.2

DMAPAM

24.8

Irgacure TM 500

1.0

[0163] Step (i) - Applying curable compound to the support

[0164] The curable compound CC1 was applied to a thickness of 150 microns on a support (paper extrusion coated with polyethylene layer).

[0165] In this example, reinforcement material (woven SEFAR) was coated on layer CC1 and flattened using a 150 micron rod / blade coater.

[0166] Step (ii) - Curing

[0167] Films were prepared by curing the product of step (i) at a speed of 15 m / min (single pass) using a LightHammer LH6 from Fusion UV Systems equipped with a D lamp operating at 100% intensity. The curing time was 0.8 seconds.

[0168] The resulting membrane was removed from the support and kept in 0.5M NaCl solution (buffered to pH ...

example 9

[0183] The film produced in Example 9 disintegrated upon drying. The decomposition on drying of the membrane produced in Example 9 and the low permselectivity of the membrane produced in Example 10 indicated that the compositions containing methacrylate could not cure as fast as the other examples without methacrylate.

[0184] Examples 12 to 14

[0185] Other curable compositions CC12 to CC14 were prepared according to the formulations shown in Table 4:

[0186] Table 4

[0187] Element

CC12wt%

CC13wt%

CC14wt%

DMAPAM

33.1

33.1

49.4

Ebecryl TM 3703

49.2

49.2

49.2

Irgacure TM 500

1.4

1.4

1.4

SR238

16.3

SR349

16.3

[0188] Films were prepared from curable compositions CC12 to CC14 using the method described in Example 1 above, except Novatexx 2473 was used in place of the woven Sefar and excess curable composition was removed using a 4 m...

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Abstract

Disclosed are membranes and processes for preparing membranes having weakly acidic or weakly basic groups comprising the steps of: (i)applying a curable composition to a support; (ii)curing the composition for less than 30 seconds to form a membrane; and (iii)optionally removing the membrane from the support; wherein the curable composition comprises a crosslinking agent having at least two acrylic groups. The membranes are particularly useful for producing electricity by reverse electrodialysis.

Description

technical field [0001] The present invention relates to membranes, processes for the preparation of these membranes and the use of these membranes, eg in reverse dialysis. Background technique [0002] Global warming and high prices of fossil fuels have increased interest in renewable energy. The most common renewable energy sources are wind and solar. Harvesting wind energy using turbines is becoming more and more common, although many consider turbines unsightly and that they are ineffective in low winds and very windy days. Solar energy is also weather dependent and is not particularly effective in countries far from the hemisphere. [0003] In 1954, R. Plattle first described in Nature the principle of using reverse electrodialysis (RED) to generate energy from seawater and freshwater. Experimental results were obtained in the United States and Israel in the 1970s. US Patent No. 4,171,409 is an early example of innovation in this field. KEMA in the Netherlands resta...

Claims

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Application Information

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IPC IPC(8): C08J5/22B01D61/42B01D61/46B01D67/00B01D69/12B01D71/40
CPCB01D67/0006H01M2300/0082C08J5/2231B01D2323/30H01M8/1072B01D61/44H01M8/1067H01M8/227B01D71/82C08J2333/26Y02E60/521Y02E60/50Y02P70/50
Inventor 威廉·约翰尼斯·范·巴克约翰尼斯·阿德里亚努斯·威廉默斯·范·恩格伦戴纳·曼纽拉·斯泰雷斯科
Owner FUJIFILM MFG EURO
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