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14. Electrothermal soft manipulator enabling safe transport and handling of thin cell/tissue sheets and bioelectronic devices

Author

Kim, Byoung Soo, primary, Kim, Min Ku, additional, Cho, Younghak, additional, Hamed, Eman E., additional, Gillette, Martha U., additional, Cha, Hyeongyun, additional, Miljkovic, Nenad, additional, Aakalu, Vinay K., additional, Kang, Kai, additional, Son, Kyung-No, additional, Schachtschneider, Kyle M., additional, Schook, Lawrence B., additional, Hu, Chenfei, additional, Popescu, Gabriel, additional, Park, Yeonsoo, additional, Ballance, William C., additional, Yu, Seunggun, additional, Im, Sung Gap, additional, Lee, Jonghwi, additional, Lee, Chi Hwan, additional, and Kong, Hyunjoon, additional

Published
2020
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17. Micro-Mechanical Deformation Mechanisms in the Fracture of Hybrid-Particulate Composites Based on Glass Beads, Rubber and Epoxies

Author

LEE, JONGHWI and YEE, ALBERT F.

Subjects
Rubber chemistry -- Research -- Thermal properties, Glass reinforced plastics -- Thermal properties -- Research, Deformations (Mechanics) -- Research -- Thermal properties, Polymers -- Thermal properties -- Research, Polymeric composites -- Research -- Thermal properties, Engineering and manufacturing industries, Science and technology, Thermal properties, Research
Abstract

JONGHWI LEE [1] ALBERT F. YEE [2] Two tougheners, glass beads and carboxyl terminated butadiene acrylonitrile copolymer (CTBN), are used to toughen and stiffen an epoxy thermoset. Rubber-encapsulated glass beads [...]

Published
2000

21. Effect of rubber interlayers on the fracture of glass bead/epoxy composites

Author

Macromolecular Science and Engineering Program, The University of Michigan, Ann Arbor, MI, 48109, USA, Ann Arbor, Lee, Jonghwi, Yee, Albert F., Macromolecular Science and Engineering Program, The University of Michigan, Ann Arbor, MI, 48109, USA, Ann Arbor, Lee, Jonghwi, and Yee, Albert F.

Abstract

The effectiveness of rubber interlayers between inorganic particles and polymer matrix for toughening has been a controversial subject. In this research, a series of rubber-encapsulated glass beads and its epoxy composites were prepared, and underlying mechanisms which can connect material parameters related with rubber interlayers with energy dissipation mechanisms, were investigated. The critical stress intensity factor (K IC) and critical strain energy release rate (G IC) of rubber-encapsulated glass bead filled epoxies were found to insignificantly depend on the existence and thickness of rubber interlayers. Microscopy studies on fracture process identified four different micro-mechanical deformations which can dissipate fracture energy: step formation, micro-shear banding, debonding of glass beads, and diffuse matrix shear yielding. It was found that the first two became less extensive and the others became more extensive as the thickness of rubber interlayers increases. This offsetting effect of micro-mechanical deformations seems to be the reason for the absence of significant toughening effect of rubber interlayers.

Published
2006

27. Electrothermal soft manipulator enabling safe transport and handling of thin cell/tissue sheets and bioelectronic devices.

Author

Byoung Soo Kim, Min Ku Kim, Younghak Cho, Hamed, Eman E., Gillette, Martha U., Hyeongyun Cha, Miljkovic, Nenad, Aakalu, Vinay K., Kai Kang, Kyung-No Son, Schachtschneider, Kyle M., Schook, Lawrence B., Chenfei Hu, Popescu, Gabriel, Park, Yeonsoo, Ballance, William C., Seunggun Yu, Sung Gap Im, Lee, Jonghwi, and Lee, Chi Hwan

Subjects
*CELL sheets (Biology), *WRINKLE patterns, *APPLIED sciences, *HYDROGELS, *ANISOTROPIC conductive films, *LEFT heart ventricle, *ARBITRARY waveform generators
Abstract

The article discusses the study of the electrothermal soft manipulator enabling safe transport and handling of thin cell/tissue sheets and bioelectronic devices. Topics discusses include this study presents a soft manipulator that can manipulate and transport cell/tissue sheets and ultrathin wearable biosensing devices seamlessly; and the soft manipulator consists of an ultrafast thermo-responsive, microchanneled hydrogel layer with tissue-like softness and an electric heater layer.

Published
2020
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