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Description:

Octaphenyl POSS (OPOSS), which has phenyl groups as organic functional groups, is a promising ionic conductor nanomaterial. Sulfonation can be performed on the eight phenyl groups. SPOSS has been studied as an ionic conductor and a conductivity-enhancing additive. Most published studies have focused on qualita-tive evaluations of SPOSS, with few quantita-tive evaluations. To my knowledge, no quantitative analysis of SPOSS with eight sulfonate groups on eight phenyl groups has been performed. Conventional sulfonation methods (ClSO3H, oleum acid, H2SO4) can introduce four sulfonic acid groups to the octaphenyl groups. However, the POSS structure is prone to hydrolysis during the sulfonation process and the subsequent acid removal process, making the synthesis of SPOSS with all POSS structures challenging. In this study, I introduced two to four sulfonic acid groups into OPOSS using ClSO3H and H2SO4. It was found that the introduction of sulfonic acid groups not only depends on the type of sulfuric acid, temperature, and time, but also on the process of removing the remaining acid so that POSS does not break down.

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Keyword: Octaphenyl polyhedral oligomeric silsesquioxanes (POSS), Sulfonated POSS (SPOSS), Nano particles, Sulfonation, Organic-inorganic materials, Proton conductor

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Publisher: National Institute for Materials Science

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Conference: Nanotech 2026 (The int. nanotech & nanoscience con. & ex.) (2026-06-17 - 2026-06-19)

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Manuscript type: Not a journal article

MDR DOI: https://doi.org/10.48505/nims.6361

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Updated at: 2026-06-23 16:25:08 +0900

Published on MDR: 2026-06-23 18:28:43 +0900