A flexible thermoelectric film based on Bi2Te2 for wearable applications was written by Liu, Changxin;Zhao, Kaiyuan;Fan, Yuhang;Gao, Yu;Zhou, Zhenghui;Li, Mengze;Gao, Yunfei;Han, Zhitao;Xu, Minyi;Pan, Xinxiang. And the article was included in Functional Materials Letters in 2022.Safety of 4,4′-Methylenediphenol The following contents are mentioned in the article:
In recent years, with the development of the Internet of Things (IoT) and wearable technol., the research and exploration of thermoelec. materials have been greatly promoted. However, traditional thermoelec. materials are rigid and brittle. Thermoelec. devices made of these materials usually cannot be closely attached to the heat and cold sources that provide temperature differences, thus limiting the application of thermoelec. materials. Therefore, manufacturing new high-performance flexible thermoelec. devices is still a huge challenge. In this work, polyimide/copper (PI/Cu) substrate was deposited by electron deposition technol. The flexible thermoelec. thin film device was fabricated by bonding N-type and P-type bismuth telluride (Bi2Te2) slurries onto the PI/Cu substrate. Then, the PDMS film was coated on the device to make the device waterproof and oxidation resistant. The output voltage and maximum power of this device, at the temperature of 80 K, reach 97.5 mV and 60 uW, resp. After 200 cycles of cyclic bending experiments, 90% high conductivity retention can be maintained. It demonstrates that the new flexible thermoelec. thin film has good flexibility and excellent stability. This work provides a simple method for the preparation of flexible thermoelec. thin films and opens up a new way for its application in the sensing equipment and wearable device of the IoT. This study involved multiple reactions and reactants, such as 4,4′-Methylenediphenol (cas: 620-92-8Safety of 4,4′-Methylenediphenol).
4,4′-Methylenediphenol (cas: 620-92-8) belongs to alcohols. Alcohols are among the most common organic compounds. They are used as sweeteners and in making perfumes, are valuable intermediates in the synthesis of other compounds, and are among the most abundantly produced organic chemicals in industry. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.Safety of 4,4′-Methylenediphenol
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts