Lee Wai Hin, Haddleton David
Department of Chemistry, University of Warwick, Coventry CV4 7AL, U.K.
ACS Omega. 2024 Nov 29;9(50):49463-49469. doi: 10.1021/acsomega.4c07193. eCollection 2024 Dec 17.
Hydrophobic materials have been fabricated by DLP vat photopolymerization of isobornyl acrylate-based resins with chemical modification and/or surface geometry engineering. Fluorinated and polydimethylsiloxane (PDMS)-based acrylic monomers are used for chemical modification and are incorporated into the printed materials. The water wettability was significantly reduced and plateaued with as low as 5% (w/w) of the auxillary hydrophobic monomer. Regarding surface geometry, meshes with different pore sizes are 3D printed, and the surface hydrophobicity increased with the pore size. We compare the oil-water separation efficiency of the 3D-printed meshes hydrophobized by these three approaches. It was found that the isobornyl acrylate-based resin already demonstrated separation at the optimum pore size. Modification with PDMS showed a further improvement in separation efficiency, whereas no significant increase was observed by use of the fluorinated monomer. This highlights that careful design of surface geometry should be considered to avoid the use of environmentally unfriendly and potentially toxic chemicals when making hydrophobic materials.
通过对基于异冰片基丙烯酸酯的树脂进行化学改性和/或表面几何工程的数字光处理（DLP）光聚合制备了疏水材料。基于氟化物和聚二甲基硅氧烷（PDMS）的丙烯酸单体用于化学改性，并被纳入印刷材料中。随着辅助疏水单体含量低至5%（w/w），水的润湿性显著降低并趋于平稳。关于表面几何形状，3D打印了不同孔径的网格，表面疏水性随孔径增加。我们比较了通过这三种方法疏水化的3D打印网格的油水分离效率。结果发现，基于异冰片基丙烯酸酯的树脂在最佳孔径下已经表现出分离效果。用PDMS改性显示分离效率进一步提高，而使用含氟单体未观察到显著增加。这突出表明，在制造疏水材料时，应考虑仔细设计表面几何形状，以避免使用对环境不友好且可能有毒的化学物质。
