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Title: Strong, Ultrastretchable Hydrogel-Based Multilayered Soft Actuator Composites Enhancing Biologically Inspired Pumping Systems
Authors: Banerjee, Hritwick 
Manivannan Sivaperuman Kalairaj 
Ren, Hongliang 
Jusufi, Ardian
Keywords: composite materials
dielectric elastomers
fluid pumps
soft active materials
soft actuators
Issue Date: 16-Aug-2021
Publisher: John Wiley and Sons Inc
Citation: Banerjee, Hritwick, Manivannan Sivaperuman Kalairaj, Ren, Hongliang, Jusufi, Ardian (2021-08-16). Strong, Ultrastretchable Hydrogel-Based Multilayered Soft Actuator Composites Enhancing Biologically Inspired Pumping Systems. Advanced Engineering Materials 23 (10) : 2100121. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Diverse solutions for active fluid movement are known in nature and in human-made devices. However, commercial peristaltic pumps are mostly rigid, noncompliant, and tough to integrate into biocompatible materials. This work aims to approximate actuator-like behavior concerning nonhemolytic pumping action and higher energy density to develop biorobotic physical models and biomedical assistive devices with life-like motion profiles. To achieve this, dielectric elastomers (DEs) offer themselves. DE connected via very high bonding (VHB) tape's pumping performance is tested and compared to a novel configuration. Comparative analysis of the VHB-based DE pump vis-a-vis the novel design solution involving composite layering of hydrogel and electroactive polymer (HEAP) with interfacial toughness of ?1522 ± 188 J m?2 exhibits increases in pressure change of up to 68 mmHg at measured flow rates of 16.8 mL s?1 with low viscoelastic losses ((Formula presented.) % at biaxial prestretch of 3 × 3, 10% stretch rate, and 20 cycles postoperation). The HEAP-sandwiched layer embracing hydrogel-based ionotronics presents 2,205% ultimate strain and sustains compressive stress of 632 kPa. This pilot thus demonstrates the advantages of greater incorporation of hydrogel-based biocompatible polymers in conjunction with soft active materials and proposes performance characterization for cardiovascular trials and related biofluid pumping applications. © 2021 The Authors. Advanced Engineering Materials published by Wiley-VCH GmbH
Source Title: Advanced Engineering Materials
ISSN: 1438-1656
DOI: 10.1002/adem.202100121
Rights: Attribution 4.0 International
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