GB9922198D0 - Porous filter element and method of fabrication thereof - Google Patents

Porous filter element and method of fabrication thereof

Info

Publication number
GB9922198D0
GB9922198D0 GBGB9922198.8A GB9922198A GB9922198D0 GB 9922198 D0 GB9922198 D0 GB 9922198D0 GB 9922198 A GB9922198 A GB 9922198A GB 9922198 D0 GB9922198 D0 GB 9922198D0
Authority
GB
United Kingdom
Prior art keywords
filter element
filter
pattern
fabrication
porous filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
GBGB9922198.8A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oxford University Innovation Ltd
Original Assignee
Oxford University Innovation Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oxford University Innovation Ltd filed Critical Oxford University Innovation Ltd
Priority to GBGB9922198.8A priority Critical patent/GB9922198D0/en
Publication of GB9922198D0 publication Critical patent/GB9922198D0/en
Priority to PCT/GB2000/003602 priority patent/WO2001021285A1/en
Priority to EP00960858A priority patent/EP1214135A1/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/0032—Organic membrane manufacture by inducing porosity into non porous precursor membranes by elimination of segments of the precursor, e.g. nucleation-track membranes, lithography or laser methods
    • B01D67/0034—Organic membrane manufacture by inducing porosity into non porous precursor membranes by elimination of segments of the precursor, e.g. nucleation-track membranes, lithography or laser methods by micromachining techniques, e.g. using masking and etching steps, photolithography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1692—Other shaped material, e.g. perforated or porous sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2093—Ceramic foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0039—Inorganic membrane manufacture
    • B01D67/0053—Inorganic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/0058—Inorganic membrane manufacture by inducing porosity into non porous precursor membranes by selective elimination of components, e.g. by leaching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/46—Epoxy resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/30—Cross-linking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/34—Use of radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/02—Details relating to pores or porosity of the membranes
    • B01D2325/022—Asymmetric membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/08—Patterned membranes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)

Abstract

A method of making a porous filter element by defining in a body of photosensitive material a pattern of varying intensity e.m. radiation (e.g. light), by creating an interference pattern in the material. After exposure to the e.m. radiation, regions of the material are selectively removed (e.g. dissolved away) in dependence upon the exposure to which they were subjected. This results in a porous element which can be used directly as a filter element, or which can be used as a lost mould to create a filter element from a different material. In that usage the voids in the resin material are filled with the material from which it is desired to make the filter, and then the resin is removed. Varying the intensity and the pattern varies the size, shape and disposition of the regions which are removed, and thus of the pores in the filter.
GBGB9922198.8A 1999-09-20 1999-09-20 Porous filter element and method of fabrication thereof Ceased GB9922198D0 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GBGB9922198.8A GB9922198D0 (en) 1999-09-20 1999-09-20 Porous filter element and method of fabrication thereof
PCT/GB2000/003602 WO2001021285A1 (en) 1999-09-20 2000-09-20 Porous filter element and method of fabrication thereof
EP00960858A EP1214135A1 (en) 1999-09-20 2000-09-20 Porous filter element and method of fabrication thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9922198.8A GB9922198D0 (en) 1999-09-20 1999-09-20 Porous filter element and method of fabrication thereof

Publications (1)

Publication Number Publication Date
GB9922198D0 true GB9922198D0 (en) 1999-11-17

Family

ID=10861238

Family Applications (1)

Application Number Title Priority Date Filing Date
GBGB9922198.8A Ceased GB9922198D0 (en) 1999-09-20 1999-09-20 Porous filter element and method of fabrication thereof

Country Status (3)

Country Link
EP (1) EP1214135A1 (en)
GB (1) GB9922198D0 (en)
WO (1) WO2001021285A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002950855A0 (en) * 2002-08-19 2002-09-12 Swinburne University Of Technology Materials
FR2894157B1 (en) * 2005-12-06 2008-01-18 Commissariat Energie Atomique PERMEABLE MEMBRANE PUSHING ONE OR MORE LIQUIDS
WO2013049936A1 (en) * 2011-10-04 2013-04-11 The University Of Western Ontario Fabrication of free standing membranes and use thereof for synthesis of nanoparticle patterns
JP7146606B2 (en) * 2018-12-10 2022-10-04 株式会社Soken Exhaust gas purification filter
CN116224710A (en) * 2023-02-17 2023-06-06 清华大学 Porous film prepared based on mask lithography technology, preparation method and application

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652412A (en) * 1985-06-14 1987-03-24 Polaroid Corporation Method for forming microporous filter
CH671709A5 (en) * 1986-07-23 1989-09-29 Sulzer Ag
DE3742770A1 (en) * 1987-12-17 1989-06-29 Akzo Gmbh MICRO / ULTRAFILTRATION MEMBRANES WITH DEFINED PORO SIZE BY IRRADIATION WITH PULSE LASERS AND METHOD FOR THE PRODUCTION THEREOF
US5256360A (en) * 1992-03-25 1993-10-26 Panasonic Technologies, Inc. Method of manufacturing a precision micro-filter

Also Published As

Publication number Publication date
WO2001021285A9 (en) 2002-09-06
WO2001021285A1 (en) 2001-03-29
EP1214135A1 (en) 2002-06-19

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)