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Gregory R. Guillen
Researcher at University of California, Los Angeles
Publications - 9
Citations - 1752
Gregory R. Guillen is an academic researcher from University of California, Los Angeles. The author has contributed to research in topics: Membrane & Polyaniline. The author has an hindex of 7, co-authored 9 publications receiving 1395 citations. Previous affiliations of Gregory R. Guillen include University of California.
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Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase Separation: A Review
TL;DR: A review of nonsolvent induced phase separation membrane preparation and characterization for many commonly used membrane polymers is presented in this article, which includes membrane porosity and pore size distribution characterization, membrane physical and chemical properties characterization, and thermodynamic and kinetic evaluation of phase inversion process.
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Probing polyamide membrane surface charge, zeta potential, wettability, and hydrophilicity with contact angle measurements
TL;DR: In this article, contact angles of polar and apolar nonaqueous liquids were combined with aqueous contact angle titrations to quantify the influence of electrolyte pH, ionic strength, and ionic composition on surface acid-base functionality, wettability, and hydrophilicity.
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Direct microscopic observation of membrane formation by nonsolvent induced phase separation
TL;DR: In this article, the authors observed the formation of finger-like macrovoids by convective flow of nonsolvent into the polymer-solvent solution, which arose from interfacial energy gradients at the polymer solution-nonsolvent interface.
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Pore-structure, hydrophilicity, and particle filtration characteristics of polyaniline–polysulfone ultrafiltration membranes
TL;DR: In this paper, a highly processable form of polyaniline was synthesized and used to synthesize and form pure poly-anilines and poly-poly-polysulfone ultrafiltration membranes by nonsolvent induced phase inversion.
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Highly dispersible polypyrrole nanospheres for advanced nanocomposite ultrafiltration membranes
Yaozu Liao,Yaozu Liao,Thomas P. Farrell,Gregory R. Guillen,Minghua Li,James A. T. Temple,Xin-Gui Li,Eric M.V. Hoek,Eric M.V. Hoek,Richard B. Kaner +9 more
TL;DR: In this article, high dispersible polypyrrole (PPy) nanospheres were synthesized and used to produce polysulfone (PSf) nanocomposite ultrafiltration membranes by a non-solvent induced phase separation (NIPS) process.