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Ince JC, Duffy AR, Salim NV. Silver Coated Multifunctional Liquid Crystalline Elastomer Polymeric Composites as Electro-Responsive and Piezo-Resistive Artificial Muscles. Macromol Rapid Commun 2024; 45:e2400370. [PMID: 38873978 DOI: 10.1002/marc.202400370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Indexed: 06/15/2024]
Abstract
Liquid crystalline elastomers (LCEs) are a class of shape-changing polymers with exceptional mechanical properties and potential as artificial muscles/polymer actuators. In this study, multifunctional LCE actuators with strain sensing and joule heating responsivity are developed. LCEs are successfully synthesized using the thiol-ene two-staged michael addition polymerization (TMAP) method. The LCE films are further functionalized via sequential polydopamine (PDA) and silver electroless coating. It is found that the PDA coating enabled the anchoring of the Ag particles to the LCE, thereby enabling the electrical conductivity of the Ag-LCEs (<0.1 Ω cm-1). The studies confirm that the Ag/PDA coated LCEs can sense up to ≈30% strain, sense their own actuation strokes, and actuate at a rate of 1.83% s-1 while lifting a weight ≈50 times its mass in response to a 12 V 2A DC current.
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Affiliation(s)
- Joshua C Ince
- Department of Mechanical Engineering and Product Design Engineering, Swinburne University of Technology, Hawthorn, Melbourne, VIC, 3122, Australia
| | - Alan R Duffy
- Centre for Astronomy and Supercomputing, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Nisa V Salim
- Department of Mechanical Engineering and Product Design Engineering, Swinburne University of Technology, Hawthorn, Melbourne, VIC, 3122, Australia
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Wu T, Ren S, Akram W, Li T, Zhu X, Li X, Niu L, Fan H, Sun Z, Fang J. High-Performance Wearable Joule Heater Derived from Sea-Island Microfiber Nonwoven Fabric. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51565-51574. [PMID: 39276071 DOI: 10.1021/acsami.4c13386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/16/2024]
Abstract
A three-dimensional (3D) hierarchical microfiber bundle-based scaffold integrated with silver nanowires (AgNWs) and porous polyurethane (PU) was designed for the Joule heater via a facile dip-coating method. The interconnected micrometer-sized voids and unique hierarchical structure benefit uniform AgNWs anchored and the formation of a high-efficiency 3D conductive network. As expected, this composite exhibits a superior electrical conductivity of 1586.4 S/m and the best electrothermal conversion performance of 118.6 °C at 2.0 V compared to reported wearable Joule heaters to date. Moreover, the durable microfiber bundle-PU network provides strong mechanical properties, allowing for the stable and durable electrothermal performance of such a composite to resist twisting, bending, abrasion, and washing. Application studies show that this kind of Joule heater is suitable for a wide range of applications, such as seat heating, a heating jacket, personal thermal management, etc.
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Affiliation(s)
- Tong Wu
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Song Ren
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Wasim Akram
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Tingshan Li
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Xiangyu Zhu
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Xinran Li
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Li Niu
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Haojun Fan
- College of Biomass Science and Engineering, Sichuan University, Chengdu, Sichuan 610065, People's Republic of China
| | - Zhe Sun
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Jian Fang
- College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
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Flexible and electrically robust graphene-based nanocomposite paper with hierarchical microstructures for multifunctional wearable devices. NANO MATERIALS SCIENCE 2021. [DOI: 10.1016/j.nanoms.2021.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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