Percolation induced gel-gel phase separation in a dilute polymer network
| Autor: | Ishikawa, Shohei, Iwanaga, Yasuhide, Uneyama, Takashi, Li, Xiang, Hojo, Hironori, Fujinaga, Ikuo, Katashima, Takuya, Saito, Taku, Chung, Ungil, Sakumichi, Naoyuki, Sakai, Takamasa |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Nature Materials 22, 1564 (2023) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41563-023-01712-z |
| Popis: | Cosmic large-scale structures, animal flocks, and living tissues are non-equilibrium organized systems created by dissipative processes. Despite the uniqueness, the realization of dissipative structures is still difficult. Herein, we report that a network formation process in a dilute system is a dissipative process, leading to percolation induced gel-gel phase separation (GGPS) in a prominent miscible polymer-water system. The dilute system, which forms a monophase structure at the percolation threshold, eventually separates into two gel phases in a longer time scale as the network formation progresses. The dilute hydrogel with GGPS exhibits an unexpected mesoscale co-continuous structure and induces adipose growth in subcutaneous. The formation mechanism of GGPS and a cosmic large-scale structure is analogous, in terms of attractive interactions in a diluted system driving phase separation. This unique phenomenon unveils the possibility of dissipative structures enabling advanced functionalities and will stimulate research fields related to dissipative structures. Comment: 23+5 pages, 4+4 figures |
| Databáze: | arXiv |
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