The Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Systems Biology Theme, Department of Biomedical Engineering, College of Life Science and Technology , Huazhong University of Science and Technology , Wuhan 430074 , China.
Langmuir. 2019 Aug 27;35(34):11123-11131. doi: 10.1021/acs.langmuir.9b01861. Epub 2019 Aug 15.
Three-dimensional porous material holds enormous potential in the field of life science and environmental protection. In this work, we proposed a facile route for the large-scale synthesis of porous poly(dimethylsiloxane) (PDMS) sponge via paraffin oil based emulsion technique. A stable emulsion could be formed by emulsifying water in the PDMS solution with the aid of paraffin oil. Moreover, the amount of emulsified water in 5 g of PDMS solution is as high as 35 g, and the skeleton of the prepared PDMS sponge is still in intact. This method is cost-effective, rapid, and easily scaled up. The water contact angle of the obtained PDMS sponge is 141.9 ± 1°, and the absorption capacities of the sponges are 13.5-33.3 g g for various organic solvents. The PDMS sponge only needed 0.069 MPa force to realize the compression ratio of 90%, which it still maintained after over 50 cycles of compression. In addition, the porous PDMS sponge exhibited an excellent oil absorption and an outstanding reusability, which were potentially useful in water purification.
三维多孔材料在生命科学和环境保护领域具有巨大的潜力。在这项工作中，我们提出了一种通过石蜡油基乳液技术大规模合成多孔聚二甲基硅氧烷（PDMS）海绵的简便方法。在石蜡油的帮助下，PDMS 溶液中的水可以乳化形成稳定的乳液。此外，在 5 g PDMS 溶液中乳化的水量高达 35 g，且制备的 PDMS 海绵的骨架仍然完整。该方法具有成本效益高、快速和易于放大等优点。所获得的 PDMS 海绵的水接触角为 141.9 ± 1°，对各种有机溶剂的吸收能力为 13.5-33.3 g g。PDMS 海绵仅需 0.069 MPa 的力即可实现 90%的压缩比，且在超过 50 次压缩循环后仍能保持。此外，多孔 PDMS 海绵表现出优异的吸油能力和出色的可重复使用性，在水净化方面具有潜在的应用价值。
