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Photoexpansion: Bio-based polyesters hard film


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IMAGE: The UV-induced deformation of the polycinnamate was analyzed by time-resolved IR spectroscopy, and it was confirmed that photoexpansion occurred based on the trans-to-cis isomerization of main chain cinnamate units..
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Credit: Image courtesy: Tatsuo Kaneko and Kenji Takada from Japan Advanced Institute of Science and Technology.
A phenomenon of photoexpansion in hard plastic films with a high glass transition temperature in the dry state was established, which was essentially different from very soft actuators, such as elastomers or gels. The photoexpanding hard actuators were expected to apply in the wide fields because they do not contain vaporable matters such as solvents and were much more thermoresistant than conventional ones. ....

Kosuke Okeyoshi , Hideyuki Murata , Tatsuo Kaneko , Gottfried Wagener , Timothy Deming , Kenji Takada , National Meeting , Research Assistant Professor Amit Kumar , Japan Advanced Institute Of Science , Chemical Society Of Japan , Hokkaido University , Japan Advanced Institute , Professor Tatsuo Kaneko , Assistant Professor Kenji Takada , Professor Hideyuki Murata , Associate Professor Kosuke Okeyoshi , Research Assistant Professor Amit , Biobased Polyesters , Mechanism Analysis , Time Resolved Measurements , Amorphous Polycinnamate Hard , Tokyo Tech , Polymer Chemistry , Assis Prof , Hokkaido Univ , Kagoshima Univ ,

Built to last: New copolymer binder to extend the life of lithium ion batteries


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IMAGE: The BP copolymer offers several advantages that put it miles ahead of the conventional PVDF binder in terms of stability and durability
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Credit: Noriyoshi Matsumi from JAIST
Anyone who has owned a smartphone for over a year is most likely aware that its built-in lithium (Li)-ion battery does not hold as much charge as when the device was new. The degradation of Li-ion batteries is a serious issue that greatly limits the useful life of portable electronic devices, indirectly causing huge amounts of pollution and economic losses. In addition to this, the fact that Li-ion batteries are not very durable is a massive roadblock for the market of electric vehicles and renewable energy harvesting. Considering the severity of these issues, it is no surprise that researchers have been actively seeking ways to improve upon the state-of-the-art designs of Li-ion batteries. ....

Tatsuo Kaneko , Noriyoshi Matsumi , Agman Gupta , Matsumi Lab , Kyoto University , Energy Materials , School Of Materials Science , Society Of Polymer Science , Japan Advanced Institute Of Science , Chemical Society Of Japan , Japan Advanced Institute , Professor Noriyoshi Matsumi , Professor Tatsuo Kaneko , Senior Lecturer Rajashekar Badam , Polymer Science , Chemical Society , Chemistry Physics Materials Sciences , Energy Fuel Non Petroleum , Polymer Chemistry , ததிசுோ காநெக்கோ , கியோட்டோ பல்கலைக்கழகம் , ஆற்றல் பொருட்கள் , பள்ளி ஆஃப் பொருட்கள் அறிவியல் , சமூகம் ஆஃப் பாலிமர் அறிவியல் , இரசாயன சமூகம் ஆஃப் ஜப்பான் , ப்ரொஃபெஸர் ததிசுோ காநெக்கோ ,