Shape memory meta-laminar jamming actuators fabricated by 4D printing

Lalegani Dezaki, M. ORCID: 0000-0001-5680-1550 and Bodaghi, M. ORCID: 0000-0002-0707-944X, 2023. Shape memory meta-laminar jamming actuators fabricated by 4D printing. Soft Matter, 19 (12), pp. 2186-2203. ISSN 1744-683X

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Laminar jamming (LJ) technology is a hot topic because it allows for the transition from conventionally quick, precise, and high-force rigid robots to flexible, agile, and secure soft robots. This article introduces a novel conceptual design of meta-laminar jamming (MLJ) actuators with a polyurethane shape memory polymer (SMP)-based meta-structure fabricated by 4D printing (4DP). The sustainable MLJ actuators behave as soft/hard robots via hot and cold programming accompanied by negative air pressure. The advantage of MLJ actuators over conventional LJ actuators is that a continuous negative air pressure is not required to stimulate the actuator. SMP meta-structures with circle, rectangle, diamond, and auxetic shapes are 4D printed. Mechanical properties of the structures are evaluated through three-point bending and compression tests. Shape memory effects (SMEs) and shape recovery of meta-structures and MLJ actuators are investigated via hot air programming. MLJ actuators with auxetic meta-structure cores show a better performance in terms of contraction and bending with 100% shape recovery after stimulation. The sustainable MLJ actuators have the capabilities of shape recovery and shape locking with zero input power while holding 200 g weight. The actuator can easily lift and hold objects of varying weights and shapes without requiring any power input. This actuator has demonstrated its versatility in potential applications, such as functioning as an end-effector and a gripper device.

Item Type: Journal article
Publication Title: Soft Matter
Creators: Lalegani Dezaki, M. and Bodaghi, M.
Publisher: Royal Society of Chemistry (RSC)
Date: 28 March 2023
Volume: 19
Number: 12
ISSN: 1744-683X
Rights: © The Royal Society of Chemistry 2023. This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License.
Divisions: Schools > School of Science and Technology
Record created by: Laura Ward
Date Added: 18 Apr 2023 09:43
Last Modified: 18 Apr 2023 09:43

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