Murase Masakazu, Ohta Riichiro, Iseki Takashi
Toyota Central R&D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan.
Langmuir. 2020 Mar 10;36(9):2247-2254. doi: 10.1021/acs.langmuir.9b03808. Epub 2020 Feb 28.
On the basis of Hansen solubility parameters (HSP), we investigated octamethylsilsesquioxane (OMS), a siloxane compound with a cage-like structure and methyl side chains, as an omniphobic substance. The HSP of OMS were determined through dissolution tests to be similar to those of polytetrafluoroethylene (PTFE), leading to the prediction that films comprising OMS should possess liquid-repellency comparable to films comprising PTFE. Indeed, an electroless-plated Ni-P film composite with OMS particles (Ni-P/OMS film) exhibited liquid-repellency comparable to or higher than that of the Ni-P film composite with PTFE particles, except toward 1-bromonaphthalene, which has a low surface free energy. Moreover, the hydrophilic influence of the Ni-P matrix was eliminated by the use of polydimethylsiloxane (PDMS) as the matrix instead of Ni-P, resulting in enhanced liquid-repellency and water-sliding behavior of the solution-sprayed PDMS film composite with the OMS particles (PDMS/OMS film). These films comprising OMS particles are promising candidates for nonfluorinated liquid-repellent films.
基于 Hansen 溶解度参数（HSP），我们研究了八甲基倍半硅氧烷（OMS），一种具有笼状结构和甲基侧链的硅氧烷化合物，作为一种超疏水物质。通过溶解试验确定 OMS 的 HSP 与聚四氟乙烯（PTFE）的相似，从而预测包含 OMS 的薄膜应具有与包含 PTFE 的薄膜相当的拒液性。事实上，含有 OMS 颗粒的化学镀 Ni-P 薄膜复合材料（Ni-P/OMS 薄膜）表现出与含有 PTFE 颗粒的 Ni-P 薄膜复合材料相当或更高的拒液性，但对表面自由能较低的 1-溴萘除外。此外，通过使用聚二甲基硅氧烷（PDMS）代替 Ni-P 作为基质，消除了 Ni-P 基质的亲水性影响，从而增强了含有 OMS 颗粒的溶液喷涂 PDMS 薄膜复合材料（PDMS/OMS 薄膜）的拒液性和水滑行为。这些包含 OMS 颗粒的薄膜是无氟拒液薄膜的有前途的候选材料。
