Electric double-layer synthesis of a spongelike, lightweight reticular membrane.
Saved in:
| Title: | Electric double-layer synthesis of a spongelike, lightweight reticular membrane. |
|---|---|
| Authors: | Itoh, Yoshimitsu, Fu, Tengfei, Champagne, Pier-Luc, Yokoyama, Yudai, Numabe, Kunita, Hong, You-lee, Nishiyama, Yusuke, Wang, Hsiao-Fang, Kumagai, Akemi, Jinnai, Hiroshi, Watanabe, Hirohmi, Shibata-Seki, Teiko, Nagao, Asuteka, Suzuki, Tsutomu, Saito, Yukie, Wakabayashi, Keigo, Yoshii, Takeharu, Izumi, Atsushi, Hagita, Katsumi, Furukawa, Junichi |
| Source: | Science. 7/3/2025, Vol. 389 Issue 6755, p73-77. 5p. |
| Subjects: | Electric double layer, Polymeric membranes, Electropolymerization, Carbonization, Resorcinol |
| Abstract: | Electrochemical polymer synthesis usually forms dense films bound to the electrode. We report a single-step synthesis of large-area, ultrathin (~70-nanometer) polymeric membranes with a luffa-like, reticular cross-linked network with low density (0.5 grams per cubic centimeter). This particular membrane forms within an electric double layer in water constructed by voltage application without supporting electrolytes—in which deprotonated resorcinol and an aldehyde react three-dimensionally with a self-termination mechanism—and is spontaneously released when the voltage bias is removed. Initially rigid with a Young's modulus of 8.9 gigapascals, this membrane reversibly regains flexibility (0.5 gigapascals) upon wetting and can be used as a large-area membrane for separations. Its shape-persistent carbonization made it possible to yield ultrathin (~22-nanometer) nanoporous carbon membranes. Editor's summary: Electropolymerization normally creates dense films. By contrast, Itoh et al. found that electropolymerization of deprotonated resorcinol and aldehydes in the absence of supporting electrolytes formed low-density, "loofah-like" ultrathin films. The reaction self-limits such that the monomers react only in the electrical double layer and the membrane releases when the bias is removed. Large-area membranes could be used for separations, and the films could be annealed to form carbon membranes. —Phil Szuromi [ABSTRACT FROM AUTHOR] |
| Copyright of Science is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | Electrochemical polymer synthesis usually forms dense films bound to the electrode. We report a single-step synthesis of large-area, ultrathin (~70-nanometer) polymeric membranes with a luffa-like, reticular cross-linked network with low density (0.5 grams per cubic centimeter). This particular membrane forms within an electric double layer in water constructed by voltage application without supporting electrolytes—in which deprotonated resorcinol and an aldehyde react three-dimensionally with a self-termination mechanism—and is spontaneously released when the voltage bias is removed. Initially rigid with a Young's modulus of 8.9 gigapascals, this membrane reversibly regains flexibility (0.5 gigapascals) upon wetting and can be used as a large-area membrane for separations. Its shape-persistent carbonization made it possible to yield ultrathin (~22-nanometer) nanoporous carbon membranes. Editor's summary: Electropolymerization normally creates dense films. By contrast, Itoh et al. found that electropolymerization of deprotonated resorcinol and aldehydes in the absence of supporting electrolytes formed low-density, "loofah-like" ultrathin films. The reaction self-limits such that the monomers react only in the electrical double layer and the membrane releases when the bias is removed. Large-area membranes could be used for separations, and the films could be annealed to form carbon membranes. —Phil Szuromi [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 00368075 |
| DOI: | 10.1126/science.adq0782 |
