Title :
Superhydrophobicity and UV stability of polydimethylsiloxane/polytetrafluoroethylene (PDMS/PTFE) coatings
Author :
Xiu, Yonghao ; Zhu, Lingbo ; Hess, Dennis ; Wong, C.P.
Author_Institution :
Sch. of Chem. & Biomolecular Eng., Georgia Inst. of Technol., Atlanta, GA
Abstract :
The incorporation of polytetrafluoroethylene (PTFE) nanoparticles in curable polydimethylsiloxane (PDMS) matrix allows the formulation of superhydrophobic films with contact angles of ~155-160deg. Evaluation of the effect of PTFE particle size on the superhydrophobicity was conducted by using a larger particle size (2-5 mum); the resulting film yielded a contact angle of 140deg. However, after UV irradiation, the surface gradually lost superhydrophobicity. Changes in surface chemistry resulting from these processes were investigated using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). Applications for this superhydrophobic film include the coating of microelectronic devices for self-cleaning and moisture protection
Keywords :
Fourier transform spectroscopy; X-ray photoelectron spectra; infrared spectroscopy; nanoparticles; particle size; polymer films; surface chemistry; 2 to 5 micron; Fourier transform infrared spectroscopy; PDMS/PTFE coatings; PTFE nanoparticles; PTFE particle size; UV irradiation; UV stability; X-ray photoelectron spectroscopy; contact angles; polydimethylsiloxane coatings; polytetrafluoroethylene coating; polytetrafluoroethylene nanoparticles; superhydrophobic films; superhydrophobicity; surface chemistry; Chemistry; Coatings; Conductive films; Fourier transforms; Infrared spectra; Microelectronics; Moisture; Nanoparticles; Spectroscopy; Stability;
Conference_Titel :
Advanced Packaging Materials: Processes, Properties and Interface, 200611th International Symposium on
Conference_Location :
Atlanta, GA
Print_ISBN :
1-4244-0260-3
DOI :
10.1109/ISAPM.2006.1666008
