Controlled actuated membranes and methods of making same

Details Controlled actuated membranes and methods of making same Controlled actuated membranes and methods of making same

2006-10-26

2009-12-08

Visconti, Geraldina (Department: 1795)

Compositions

Liquid crystal compositions

C252S299600, C428S001100, C430S020000, C430S270100

Reexamination Certificate

active

07628935

ABSTRACT:
The invention describes shape changing membranes that can be precisely controlled using the unique approach of smectic liquid-crystalline elastomers (LCEs) with patterned electrodes and a process of preparing and creating the elastomers. The methods to create the shape changing membranes is based on the electroclinic effect of smectic layers in a polymer network and provides a novel material for actuators.

REFERENCES:
patent: 6030668 (2000-02-01), Hall et al.
patent: 6294109 (2001-09-01), Ratna et al.
patent: 7122229 (2006-10-01), Camacho-Lopez et al.
patent: 2006/0041061 (2006-02-01), Naciri et al.
Lehmann, W., et al., Giant lateral electrostriction in ferroelectric liquid-crystalline elastomers, Nature 410, 447, 2001.
D.L. Thomsen, III, P. Keller, J. Naciri et al., Liquid crystal elastomers with mechanical properties of a muscle.Macromolecules34 (2001), pp. 5868-5875.
Garoff et al, Reply to “Behavior of electric susceptibility and electroclinic coefficient near the chiral smecticA-C* transition” R.B. Physical Review A 18, 2739, 1978.
Kohler et al., Electroclinic effect in free-standing smectic elastomer films, . Appl. Phys. A- Mater. Sci. & Proc. 80, 381, 2005.
Naciri et al, Room Temperature Ferroelectric Terpolymers with Large Spontaneous Polarization, Macromolecules, 1995, 28, 5274-5279.
Naciri, et al, Fast switching ferroelectric side-chain liquid-crystalline polymer and copolymer, Liq. Cryst. 1991, 10 (4), 585.
Lee and Patel, Nonlinear behavior of the field-induced molecular tilt near the smecticA-C* transition, App. Phys. Lett., 54, 1653, 1989.
Camacho-Lopez, et al., Fast liquid-crystal elastomer swims into the dark, Nature, vol. 3, p. 307, May 2004.
Nishikawa, Smectic-Aliquid single crystal elastomers—strain induced break-down of smectic layers,Macromol. Chem. Phys.200, 312-322 (1999).
Hamelinck, et al., Homeotropic alignment on surface-initiated liquid crystalline polymer brushes, J. Mater. Chem., 2005, 15, 381-385.
P. E. Cladis, Liquid Crystalline Elastomers as Artificial Muscles, Dynamic Control Systems Proceedings, Processes, Arde Guran (ed) (2000).
Yoseph Bar-Cohen, Electroactive Polymers as Arti. cial Muscles: A Review, Journal of Spacecraft and Rockets vol. 39, No. 6, Nov.-Dec. 2002.
Nishikawa,et al., Smectic A liquid single crystal elastomers showing macroscopic in-plane fluidity, Macromol. Rapid Commun. 18,65-71 (1997).

Affiliated with

Also associated with

Rating

Controlled actuated membranes and methods of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Controlled actuated membranes and methods of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controlled actuated membranes and methods of making same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4117223