GB2372252A - Liquid crystal elastomer films and method of production thereof - Google Patents

Liquid crystal elastomer films and method of production thereof Download PDF

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Publication number
GB2372252A
GB2372252A GB0210613A GB0210613A GB2372252A GB 2372252 A GB2372252 A GB 2372252A GB 0210613 A GB0210613 A GB 0210613A GB 0210613 A GB0210613 A GB 0210613A GB 2372252 A GB2372252 A GB 2372252A
Authority
GB
United Kingdom
Prior art keywords
production
liquid crystal
crystal elastomer
elastomer films
devices
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.)
Granted
Application number
GB0210613A
Other versions
GB0210613D0 (en
GB2372252B (en
Inventor
Andrew Graham Biggs
Stuart Dailey
Keith Moray Blackwood
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.)
Qinetiq Ltd
Original Assignee
Qinetiq 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 Qinetiq Ltd filed Critical Qinetiq Ltd
Publication of GB0210613D0 publication Critical patent/GB0210613D0/en
Publication of GB2372252A publication Critical patent/GB2372252A/en
Application granted granted Critical
Publication of GB2372252B publication Critical patent/GB2372252B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/38—Polymers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N15/00—Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using the Nernst-Ettingshausen effect
    • H10N15/10—Thermoelectric devices using thermal change of the dielectric constant, e.g. working above and below the Curie point
    • H10N15/15—Selection of materials
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/857—Macromolecular compositions

Abstract

This invention relates to the production of free-standing liquid crystal elastomer films, in particular of large area for use in various devices. Example of devices include piezo and pyroelectric devices. The method of production involves the use of a silicon wafer which may be doped thus allowing for poling during production.

Description

AUK Patent Application, g,GB,2 372 252 HA {43} Date of Printing by UK
Office 21.08.2002 (21) Application No 0210613.6 (51) INTCL7 G02F 1/1333, CORK 19/38
(22) Date of Filing 20.11.2000 (52) UK CL (Edition T) (30) Priority Data C3P PKN PKQ (31) 9928062 (32) 29.11.1999 133) GB C3WW227
U1S S1387 S1421 S1532 51574 S2061 S2074
(86) International Application Data PCT/GB2000/004381 En 20.11.2000 (56) Documents Cited by ISA (87) International Publication Data WO2001/040850 En 07.06.2001 (58) Field of Search by ISA
INT CL7 C09K, G02F
EPO-lnternal (71) Applicant(s) Qinetiq Limited (Incorporated in the United Kingdom) (74) Agent and/or Address for Service 85 Buckingham Gate, LONDON, SW1E 6PD, A O Bowderv United Kingdom IP Formalities A4 Bldg, Cody Technology Park, Ively Road, FARNBOROUGH, Hants, GU14 OLX, (72) Inventor(s) United Kingdom Andrew Graham Biggs Stuart Dailey Keith Moray Blackwood (54) Abstract Title Liquid crystal elastomer films and method of production thereof {57} This invention relates to the production of free-standing liquid crystal elastomer films, in particular of large area for use in various devices. Example of devices include piezo and pyroelectric devices. The method of production involves the use of a silicon wafer which may be doped thus allowing for poling during production. R ,.. l 2 C)
W N an D
GB0210613A 1999-11-29 2000-11-20 Liquid crystal elastomer films and method of production thereof Expired - Fee Related GB2372252B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9928062A GB2356633A (en) 1999-11-29 1999-11-29 Free standing liquid crystal elastomer film fabrication
PCT/GB2000/004381 WO2001040850A1 (en) 1999-11-29 2000-11-20 Liquid crystal elastomer films and method of production thereof

Publications (3)

Publication Number Publication Date
GB0210613D0 GB0210613D0 (en) 2002-06-19
GB2372252A true GB2372252A (en) 2002-08-21
GB2372252B GB2372252B (en) 2003-09-03

Family

ID=10865263

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9928062A Withdrawn GB2356633A (en) 1999-11-29 1999-11-29 Free standing liquid crystal elastomer film fabrication
GB0210613A Expired - Fee Related GB2372252B (en) 1999-11-29 2000-11-20 Liquid crystal elastomer films and method of production thereof

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9928062A Withdrawn GB2356633A (en) 1999-11-29 1999-11-29 Free standing liquid crystal elastomer film fabrication

Country Status (5)

Country Link
EP (1) EP1244936A1 (en)
JP (1) JP2003515478A (en)
KR (1) KR20020069198A (en)
GB (2) GB2356633A (en)
WO (1) WO2001040850A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7601274B2 (en) 2004-03-31 2009-10-13 The University Of Connecticut Shape memory main-chain smectic-C elastomers
US7563388B2 (en) 2004-08-27 2009-07-21 The University Of Connecticut Crosslinked liquid crystalline polymer, method for the preparation thereof, and articles derived therefrom
EP2926005A1 (en) 2012-11-27 2015-10-07 CNR - Consiglio Nazionale Delle Ricerche Light driven liquid crystal elastomer actuator
WO2016102015A1 (en) 2014-12-23 2016-06-30 Consiglio Nazionale Delle Ricerche - Cnr Multiple alignment method in liquid crystalline medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997025649A1 (en) * 1996-01-04 1997-07-17 The Secretary Of State For Defence Liquid crystal elastomers
US5773179A (en) * 1995-12-22 1998-06-30 The Secretary Of State For Defence Defence Evaluation & Research Agency Liquid crystal polymers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5773179A (en) * 1995-12-22 1998-06-30 The Secretary Of State For Defence Defence Evaluation & Research Agency Liquid crystal polymers
WO1997025649A1 (en) * 1996-01-04 1997-07-17 The Secretary Of State For Defence Liquid crystal elastomers

Also Published As

Publication number Publication date
WO2001040850A1 (en) 2001-06-07
EP1244936A1 (en) 2002-10-02
GB9928062D0 (en) 2000-01-26
JP2003515478A (en) 2003-05-07
GB0210613D0 (en) 2002-06-19
GB2356633A (en) 2001-05-30
KR20020069198A (en) 2002-08-29
GB2372252B (en) 2003-09-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20091120