Showing papers by "Congjie Gao published in 2011"
TL;DR: In this article, the performance of asymmetric polysulfone membranes was evaluated in terms of pure water flux (PWF), protein rejection, porosity, contact angle, tensile strength, and elongation at break.
285 citations
TL;DR: In this article, the effect of SiO 2 nanoparticles on the membrane permeation properties, anti-fouling performances, and membrane morphologies and structures was examined and discussed, and the results showed that the membrane structure was not obviously affected by adding SiO2, and the membrane performances such as hydrophilicity and surface wettability of the membranes were enhanced by adding nano-SiO 2.
258 citations
TL;DR: In this article, the physical background, preparation and application aspects of polyelectrolyte complexes (PECs) in pervaporation, nanofiltration and fuel cells are discussed.
209 citations
TL;DR: In this article, the effectiveness of reverse osmosis (RO) and nanofiltration (NF) membranes in the treatment of biologically treated textile effluent in terms of COD removal, salinity reduction as well as permeate flux was evaluated.
145 citations
TL;DR: In this paper, a thin-film composite aromatic polyamide reverse osmosis membranes were modified by depositing N-isopropylacrylamide-co-acrylic acid copolymers on the membrane surface, and the modified membranes showed improved membrane properties.
103 citations
TL;DR: A thin-film composite polyamide nanofiltration membrane was prepared through interfacial polymerization of polymeric polyamine polyvinylamine (PVAm) with isophthaloyl chloride (IPC) on a polysulfone supporting film.
96 citations
TL;DR: In this paper, a novel type of positively charged copolymers, poly (2-methacryloyloxy ethyl trimethylammonium chloride-co-2-hydroxyethyl acrylate) (PDMCHEA) were synthesized via free-radical copolymerization.
88 citations
TL;DR: In this paper, the surface modification and the improved acid stability and chlorine resistance of the commercial thin-film composite polyamide reverse osmosis membranes coated with hydrophilic copolymers poly(N-isopropylacrylamide-co-acrylonitrile) (P(NIPAM-Co-Am)) surface layer were investigated.
82 citations
TL;DR: The polyamide/chitosan (PA/CS) composite membrane was shown to perform better than the original polyamide membrane in terms of rejection of divalent salts (99.8% for MgCl2 and 98.5% for Na2SO4) at the same concentration as discussed by the authors.
79 citations
TL;DR: In this article, an integrated membrane system (IMS) was used to evaluate the NF efficiency of seawater softening and showed that the high softening efficiency of NF membrane could be achieved using UF membrane with smaller MWCO (20kDa).
74 citations
TL;DR: In this paper, a thin-film composite (TFC) aromatic polyamide reverse osmosis membranes were modified by depositing a thermo-responsive polymer poly(N-isopropylacrylamide-co-acryamide) with low critical solution temperature (LCST) on membrane surface, and the modified membranes showed significantly improved antifouling properties and cleaning efficiency.
TL;DR: In this paper, a type of zeolites were surface modified with octadecyltrichlorosilane (OTS) and then added in polyamide layer of thin film composite (TFC) membranes to prepare surface-modified zeolite-polyamide thin film nanocomposite (TFN) membranes for desalination.
Abstract: NaA type zeolites were surface modified with octadecyltrichlorosilane (OTS) and then added in polyamide layer of thin film composite (TFC) membranes to prepare surface-modified zeolite-polyamide thin film nanocomposite (TFN) membranes for desalination. The zeolites were characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The properties of membranes were characterized by scanning electron microscopy (SEM), contact angle measurement, and the permeation experiment, respectively. The results showed that zeolites were successfully surface-modified with OTS without changing of its structure. The SEM images depicted that the membrane morphology was more homogeneous and the zeolites aggregation in membranes was ameliorated after the zeolites were surface modified. The results of contact angle measurement indicated that the hydrophilic property of membranes was not changed after the zeolites were modified with the long alkyl chain organosilane. The RO performance results v...
TL;DR: In this paper, three different kinds of systems including polysulfone (PSF)/N, N-Dimethylacetamide (DMAC)/poly(vinyl pyrrolidone) (PVP), PSF/DMAC/Ethanol ternary systems and a quaternary system were used as casting solutions.
TL;DR: In this paper, the surface charged and structural information of sulfonated polyethersulfone nanofiltration membrane are acquired through the analysis on the relevant electrochemical impedance spectroscopies (EIS) expressed in terms of dispersions of the impedance with frequency (1.KHz-1.MHz).
TL;DR: In this article, a resin-filling electrometathesis technology (EMT) is attempted to produce tartaric acid based on our previous work, and the cell voltage, current efficiency and energy consumption are investigated and compared during the tartarsic acid production by EMT before and after the filling of resin, respectively.
TL;DR: In this paper, a new composite membrane Ti/BDD, made by depositing CVD (chemical vapor deposition) boron-doped diamond film on titanium membrane to modify porous titanium surface, that can be cleaned electrochemically is proposed.