Biodegradable Molybdenum/Polybutylene Adipate Terephthalate Conductive Paste for Flexible and Stretchable Transient Electronics. Issue 2 (12th March 2021)

• Record Type: Journal Article
• Authors: Kim, Kyung‐Sub; Yoo, Jaeyoung; Shim, Jun‐Seok; Ryu, Young‐In; Choi, Suyeon; Lee, Ju‐Yong; Lee, Hyuck Mo; Koo, Jahyun; Kang, Seung‐Kyun
• Is Part Of: Advanced materials technologies. Volume 7:Issue 2(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-03-12
• Subjects: biodegradable conductive paste -- green electronics -- lubricant -- stretchable electronics -- transient electronics; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202001297
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Biodegradable or eco‐degradable electronics is an emerging field of technology capable of reducing the excessively increasing electronic waste originating from the rapid development of personalized and bio‐integrated devices and skin adhesive patches. Through an advantageous solution process, biodegradable conductive pastes can be employed in various applications of soft and flexible devices. Herein a biodegradable conductive paste composed of molybdenum (Mo) microparticles and polybutylene adipate terephthalate (PBAT) exhibiting excellent mechanical flexibility and stretchability is reported, while also demonstrating substantially superior mechanical and conductive properties compared with previously reported biodegradable polymer matrices such as poly butanedithiol 1, 3, 5‐triallyl‐1, 3, 5‐triazine‐2, 4, 6‐(1H, 3H, 5H)‐trione pentenoic anhydride (PBTPA) and Candelilla wax (CW) owing to the significant elongation of PBAT. Moderate dissolution in phosphate buffer saline (PBS) accomplishes its full biodegradability and programmable lifecycle. Tetraglycol (TG) enhances elongation and conductivity performance by acting as a lubricant and improving the dispersion of microparticles. The practical implications of the Mo/PBAT pastes are demonstrated in numerous biodegradable electronic applications such as electrodes, strain and temperature sensors, joule heaters, interconnectors, and freestanding radiofrequency (RF) coils. Abstract : Fully biodegradable molybdenum/polybutylene adipate terephthalate (Mo/PBAT) conductive paste shows significant elongation (≈36%) and reasonable electrical conductivity (1200 S m –1 ) that can be enhanced by addition of tetraglycol (TG) lubricant. Serpentine‐structured Mo/PBAT interconnecting wire retains electrical performance up to 245% strain, as shown in the top image. Molybdenum microparticles in the paste can dissolve fully within 8 days.