In this study, flat sheet asymmetric polyphenylsulfone (PPSU) ultrafiltration membranes with enhanced antifouling properties were prepared with a non-solvent induced phase separation (NIPS) method through compound additives containing a polymeric pore-forming agent, a small molecular non-solvent and a surfactant. The formation processes of the porous asymmetric membranes with different kinds of...

The regenerative H₂/Br₂-HBr fuel cell, utilizing an oxidant solution of Br₂ in aqueous HBr, shows a number of benefits for grid-scale electricity storage. The membrane-electrode assembly, a key component of a fuel cell, contains a proton-conducting membrane, typically based on the perfluorosulfonic acid (PFSA) ionomer. Unfortunately, the high cost of PFSA membranes and their relatively high bro...

Introduction Nanosecond pulse laser sources with extended wavelength diversity are of great interest for numerous applications. The use of fiber lasers for second harmonic generation allows combining efficient wavelength conversion with the possibility to keep all-fiber format. Second-order nonlinear optical processes can be implemented in all-fiber configurations by using a periodically poled ...

In this study, polyphenylsulfone (PPSU) hollow fiber membrane was fabricated via a wet spinning method with the addition of ethylene glycol (EG) in the range of 0-10 wt% as the additive. The EG was added to improve the membrane pore formation and interconnectivity for better membrane contactor performance in extracting and removing the free fatty acid (FFA) from crude palm oil (CPO). Four diffe...

Five methods for representing pupil plane aberrations are discussed. The reference axis and reference surface can strongly affect the representation. The line of sight (an axis normal to wavefront) may not be optimal. Alternative Representations of Aberrations of the Eye Stanley A. Klein*, Daniel D. Garcia#, University of California, Berkeley, CA 94720-2020 *School of Optometry, #Computer Scien...