INS4-0181
Multifunctional Coatings Derived from Hydrogels and Organogels Based on a Biomimetic Approach
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Sep 30, 2026
15:50 - 16:15
Room 106
Session Chairs
Moon Jong HAN
Presenter(s)
ATSUSHI HOZUMI (AIST)
Co-Author(s)
Abstract
In this talk, we highlight recent advances in gel-based biomimetic coatings that exhibit exceptional dynamic surface functionalities. As a first example, we present organogel-based transparent coatings, termed Self-Lubricating Gels (SLUG), inspired by the remarkable anti-adhesive and antifouling properties of slug integuments¹⁻⁴. SLUG are typically fabricated via platinum-catalyzed crosslinking of PDMS precursors in the presence of an organic guest liquid, such as silicone oil. When the affinity between the guest liquid and the PDMS network falls below a critical threshold, the liquid gradually migrates toward the PDMS surface. By exploiting this syneresis-driven liquid secretion phenomenon, we have succeeded in achieving various new surface functionalities, such as self-healing superhydrophobicity and highly effective anti-icing/-snow properties. As a second example, we introduce hydrogel-based transparent coatings that derive multiple functionalities from their inherent superhydrophilicity. These coatings can be readily prepared from nanoscale clay particles, polyvinylpyrrolidone, and aqueous amino-silane precursors⁵⁻⁷. Upon exposure to high humid conditions, surface scratches with widths of up to 30 μm are completely repaired within one hour. Furthermore, the coatings exhibit a broad spectrum of advanced functionalities, including long-lasting antifogging performance, underwater superoleophobicity, and antimicrobial activity. Our gel-based coatings represent a promising platform for the development of next-generation biomimetic coatings.
Acknowledgement: This study was partially supported by “Carbon Neutral Technology Research and Development Program” (Ministry of the Environment, Japan).
References : 1) J. Mater. Chem. A, 3, 12626 (2015), 2) Langmuir, 33, 9972 (2017), 3) Adv. Mater. Interfaces, 6, 1801358 (2019), 4) Langmuir, 38, 11362 (2022), 5) ACS Appl. Mater. Interfaces, 8, 4318 (2016), 6) Langmuir, 36, 7439 (2020), 7) Langmuir, 38, 9874 (2022).
Acknowledgement: This study was partially supported by “Carbon Neutral Technology Research and Development Program” (Ministry of the Environment, Japan).
References : 1) J. Mater. Chem. A, 3, 12626 (2015), 2) Langmuir, 33, 9972 (2017), 3) Adv. Mater. Interfaces, 6, 1801358 (2019), 4) Langmuir, 38, 11362 (2022), 5) ACS Appl. Mater. Interfaces, 8, 4318 (2016), 6) Langmuir, 36, 7439 (2020), 7) Langmuir, 38, 9874 (2022).
