Hydrophobicity control by a supercritical drying technique in a sol–gel process with hybrid materials》.pdfVIP

Materials Research Bulletin 70 (2015) 87–92 Contents lists available at ScienceDirect Materials Research Bulletin journal homepage: www.else vie /locat e/mat resbu Hydrophobicity control by a supercritical drying technique in a sol–gel process with hybrid materials Hongbo Ren, Zemin Qiao, Xiao Liu, Xudong Cui * Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, 621900 Mianyang, Sichuan, PR China A R T I C L E I N F O A B S T R A C T Article history: We successfully synthesized one type of cheap super-hydrophobic hybrid porous materials in a sol–gel Received 19 August 2014 process. In this route, hydrophilic polymers and TEOS-base sol are used as precursors, the ultraviolet ray- Received in revised form 10 April 2015 initiated polymerization and supercritical fluid drying techniques are combined together to fulfill this Accepted 12 April 2015 task. All fabricated samples exhibit lotus-leaf-like surface structures with super-hydrophobicity. The Available online 14 April 2015 underlying mechanisms are carefully investigated using a field-emission scanning electron microscopy (FESEM) and an X-ray photoelectron spectroscopy (XPS). We found that a well-controlled drying process Keywords: is crucial to the formation of such super-hydrophobic surfaces. As high as 90% production rate is obtained Composite materials