Percolation induced gel-gel phase separation in a dilute polymer network
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arXiv
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| Format: | Preprint |
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2022
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| author | Ishikawa, Shohei Iwanaga, Yasuhide Uneyama, Takashi Li, Xiang Hojo, Hironori Fujinaga, Ikuo Katashima, Takuya Saito, Taku Chung, Ungil Sakumichi, Naoyuki Sakai, Takamasa |
| author_facet | Ishikawa, Shohei Iwanaga, Yasuhide Uneyama, Takashi Li, Xiang Hojo, Hironori Fujinaga, Ikuo Katashima, Takuya Saito, Taku Chung, Ungil Sakumichi, Naoyuki Sakai, Takamasa |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2202_09754 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Percolation induced gel-gel phase separation in a dilute polymer network Ishikawa, Shohei Iwanaga, Yasuhide Uneyama, Takashi Li, Xiang Hojo, Hironori Fujinaga, Ikuo Katashima, Takuya Saito, Taku Chung, Ungil Sakumichi, Naoyuki Sakai, Takamasa Soft Condensed Matter Materials Science 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. |
| title | Percolation induced gel-gel phase separation in a dilute polymer network |
| topic | Soft Condensed Matter Materials Science |
| url | https://arxiv.org/abs/2202.09754 |