Synthesis of AgCl Nanoparticles in W/O Microemulsion and Study of AgCl/Poly(GMA-co-MMA-co-AMPS) Copolymer Organic-Inorganic Hybrid Membranes

2013 ◽  
Vol 328 ◽  
pp. 719-723
Author(s):  
Ting Wang ◽  
Li Guang Wu ◽  
Zeng Jiang
Keyword(s):  
Glycidyl Methacrylate ◽  
Sulfonic Acid ◽  
Hybrid Membrane ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Microemulsion Polymerization ◽  
Good Separation ◽  
Inorganic Hybrid ◽  
Agcl Nanoparticles

AgCl Nanoparticles were synthesized in the W/O microemulsion using 2-acrylamido-2-methyl propane sulfonic acid as a surfactant, glycidyl methacrylate (GMA)/ methacrylate (MMA) mixtures as an oil phase. Then, AgCl/poly (GMA-MMA-AMPS) copolymer organic-inorganic hybrid membranes were prepared by in-situ microemulsion polymerization for separation of benzene/cyclohexane mixture. The effect of concentration of surfactant (CAMPS) and salt (NaCl and AgNO3) on the morphology of AgCl nanoparticles was studied by TEM. The results showed that the sizes of AgCl nanoparticles increased with salt concentration. AgCl nanoparticles maintained well dispersion in AgCl/poly (GMA-MMA-AMPS) copolymer organic-inorganic hybrid membranes. The hybrid membrane demonstrated good separation performance for benzene/cyclohexane mixtures.

Novel hybrid membranes by incorporating SiO2 nanoparticles using in situ microemulsion polymerization: preparation, characterization and enhancement in the performance for CO2/N2

RSC Advances ◽  
2015 ◽  
Vol 5 (80) ◽  
pp. 65084-65093 ◽  
Author(s):  
Ting Wang ◽  
Cheng Cheng ◽  
Jiang-nan Shen ◽  
Li-guang Wu ◽  
Bart van der Bruggen ◽  
...  
Keyword(s):  
Sio2 Nanoparticles ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Microemulsion Polymerization ◽  
High Separation

SiO2/PMMA membranes by in situ microemulsion polymerization showed high separation performance, due to the good distribution of small SiO2 in the polymer.

Preparation of SiO2/PMMA Organic-Inorganic Hybrid Membrane via Microemulsion Situ Polymerization Technology

2013 ◽  
Vol 750-752 ◽  
pp. 1897-1900 ◽  
Author(s):  
Man Lu ◽  
Yan Yan Zhou ◽  
Yi Chen Zhu ◽  
Jie Lian ◽  
Tong Hui Lin ◽  
...  
Keyword(s):  
Average Particle Size ◽  
Visible Spectrum ◽  
Hybrid Membrane ◽  
Average Particle ◽  
Hybrid Membranes ◽  
Inorganic Hybrid ◽  
Spherical Structure ◽  
Transmission Electron ◽  
Inverse Microemulsion ◽  
Teos Content

SiO2 nanoparticles was synthesized by F127/MMA/(NH3+H2O)/TEOS inverse microemulsion, the formation and morphology of nanoparticles were analyzed by Ultraviolet-visible spectrum and transmission electron microscopy, and scanning electron microscope. The results showed that SiO2 nanoparticles were spherical structure and its average particle size was about 25 nanometers. The number of SiO2 nanoparticles in the microemulsion and hybrid membrane was increased slightly with the increase of TEOS content. However, agglomeration of SiO2 nanoparticles appeared in the hybrid membranes at high TEOS content.

scholarly journals Highly Dual Antifouling and Antibacterial Ultrafiltration Membranes Modified with Silane Coupling Agent and Capsaicin-Mimic Moieties

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 412 ◽  
Author(s):  
Lili Zhang ◽  
Yuanyuan Tang ◽  
Xiaohui Jiang ◽  
Liangmin Yu ◽  
Changyun Wang
Keyword(s):  
In Situ Polymerization ◽  
Hybrid Membrane ◽  
Membrane Properties ◽  
Separation Performance ◽  
Hybrid Membranes ◽  
Cleaning Efficiency ◽  
Optimal Separation ◽  
Dual Functional ◽  
Microwave Assistance ◽  
Functional Membranes

Dual antifouling and antibacterial polysulfone(PSf)/polyethersulfone(PES) hybrid membranes were developed by the synergy of capsaicin-mimic N-(5-methyl acrylamide-2,3,4 hydroxy benzyl) acrylamide (AMTHBA) and vinyl triethylene (b-methoxy ethoxy) silane (VTMES). First, AMTHBA as a natural antimicrobial agent was incorporated into a casting solution via “microwave-assistance (MWA) in situ polymerization-blending” process to construct a hydroxyl-rich environment. Then, VTMES crosslinked to a hydroxyl-rich polymer matrix via hydrolytic condensation, and the influence of VTMES content on the hybrid membrane properties was systematically investigated. When the VTMES added amount was 1.0 wt %, the hybrid membrane achieved an optimal separation performance including a steady-state humic acid (HA) (5 mg/L) permeation flux of 326 L·m−2·h−1 and a rejection percentage of 97%. The antibacterial tests revealed that the hybrid membranes exhibited sustained bactericidal activity and effective inhibition of bacterial adhesion. Besides, the dual-functional membranes were clean as new after two-cycles filtration (with a cleaning efficiency of ~90%), indicating that the network silicone film on the surface benefits the foulant repellence. Hopefully, the dual-functional membranes constructed in this study can be applicable to the pretreatment stage of water treatment.

scholarly journals Organic-Inorganic Artificial Ion Channel Polyvinylidene Fluoride Membranes for Controllable Selectivity Transport of Alkali Metal Cations

Membranes ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 174
Author(s):  
Ye Tian ◽  
Shaohua Jin ◽  
Xinxin Zhang ◽  
Lihua Wang ◽  
Yakai Lin ◽  
...  
Keyword(s):  
Ion Transport ◽  
Polyvinylidene Fluoride ◽  
Cation Transport ◽  
Sodium Cation ◽  
Hybrid Membrane ◽  
Hybrid Membranes ◽  
Mass Ratio ◽  
Alkali Metal Cations ◽  
Divalent Ions ◽  
Inorganic Hybrid

In this article, organic–inorganic hybrid materials with different functional groups were used to form organic–inorganic hybrid dense membranes for selective separation of mono/divalent ions by blending these materials and polyvinylidene fluoride (PVDF) in dimethylacetamide with HCl as the catalyst. The membranes prepared by 3-(ureido benzene) propyltriethoxysilane (H1), 3-(ureido-4-methoxyphenyl) propyltriethoxysilane (H2), 3-(ureido-3-chloro-4-methoxyphenyl) propyltriethoxysilane (H3), 3-(ureidoindazolyl) propyltrieth-oxysilane (H4), or 3-(ureidopentanol) propyltriethoxysilane (H5) were labeled as HM1–HM5, respectively. The transport properties of different chlorides were tested. The effects of different anions on sodium cation transport were also tested. The results showed that HM1–HM4 could transport monovalent Li+, Na+, and K+ except Ca2+ and Mg2+, and the permeability of Li+, Na+, and K+ through the hybrid membranes followed the order of PNa+ > PK+ > PLi+. Moreover, membranes with different H2 content were also prepared due to HM2 having the best ion transport performance. The ion transport performance increased accordingly with the mass ratio of H2 to PVDF, and the permeability of Na+ was twice that of Li+ and K+ when the mass ratio was 15/10. Under this condition, it was also proved that NH4+ could not transport through the hybrid membrane with various selectivity for different anions as Cl− > NO3− > HCO3− > SO42−.

Fabrication of antifouling polymer–inorganic hybrid membranes through the synergy of biomimetic mineralization and nonsolvent induced phase separation

2015 ◽  
Vol 3 (14) ◽  
pp. 7287-7295 ◽  
Author(s):  
Xueting Zhao ◽  
Yanlei Su ◽  
Jialin Cao ◽  
Yafei Li ◽  
Runnan Zhang ◽  
...  
Keyword(s):  
Phase Separation ◽  
Defense Mechanisms ◽  
Hybrid Membranes ◽  
Biomimetic Mineralization ◽  
Inorganic Hybrid ◽  
Membrane Surfaces ◽  
Collaborative Defense

Antifouling hybrid membranes were prepared through the synergy of in situ biomimetic mineralization and nonsolvent induced phase separation, which endows membrane surfaces with collaborative defense mechanisms.

scholarly journals Dimethylimidazolium-Functionalized Polybenzimidazole and Its Organic–Inorganic Hybrid Membranes for Anion Exchange Membrane Fuel Cells

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2864
Author(s):  
Li-Cheng Jheng ◽  
Cheng-Wei Cheng ◽  
Ko-Shan Ho ◽  
Steve Lien-Chung Hsu ◽  
Chung-Yen Hsu ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hybrid Membrane ◽  
Side Chain ◽  
Hybrid Membranes ◽  
Inorganic Hybrid ◽  
Fuel Cell Performance ◽  
Crosslinking Process ◽  
Membrane Morphology ◽  
Exchange Membrane ◽  
Power Densities

A quaternized polybenzimidazole (PBI) membrane was synthesized by grafting a dimethylimidazolium end-capped side chain onto PBI. The organic–inorganic hybrid membrane of the quaternized PBI was prepared via a silane-induced crosslinking process with triethoxysilylpropyl dimethylimidazolium chloride. The chemical structure and membrane morphology were characterized using NMR, FTIR, TGA, SEM, EDX, AFM, SAXS, and XPS techniques. Compared with the pristine membrane of dimethylimidazolium-functionalized PBI, its hybrid membrane exhibited a lower swelling ratio, higher mechanical strength, and better oxidative stability. However, the morphology of hydrophilic/hydrophobic phase separation, which facilitates the ion transport along hydrophilic channels, only successfully developed in the pristine membrane. As a result, the hydroxide conductivity of the pristine membrane (5.02 × 10−2 S cm−1 at 80 °C) was measured higher than that of the hybrid membrane (2.22 × 10−2 S cm−1 at 80 °C). The hydroxide conductivity and tensile results suggested that both membranes had good alkaline stability in 2M KOH solution at 80 °C. Furthermore, the maximum power densities of the pristine and hybrid membranes of dimethylimidazolium-functionalized PBI reached 241 mW cm−2 and 152 mW cm−2 at 60 °C, respectively. The fuel cell performance result demonstrates that these two membranes are promising as AEMs for fuel cell applications.

Electron Microscopy of Mycoplasma Pneumoniae

1971 ◽  
Vol 29 ◽  
pp. 258-259 ◽  
Author(s):  
E. S. Boatman ◽  
G. E. Kenny
Keyword(s):  
Electron Microscopy ◽  
Light Microscopy ◽  
Growth Phase ◽  
Hela Cells ◽  
Sulfonic Acid ◽  
Gamma Globulin ◽  
Horse Serum ◽  
Morphological Aspects ◽  
The Family

Information concerning the morphology and replication of organism of the family Mycoplasmataceae remains, despite over 70 years of study, highly controversial. Due to their small size observations by light microscopy have not been rewarding. Furthermore, not only are these organisms extremely pleomorphic but their morphology also changes according to growth phase. This study deals with the morphological aspects of M. pneumoniae strain 3546 in relation to growth, interaction with HeLa cells and possible mechanisms of replication.The organisms were grown aerobically at 37°C in a soy peptone yeast dialysate medium supplemented with 12% gamma-globulin free horse serum. The medium was buffered at pH 7.3 with TES [N-tris (hyroxymethyl) methyl-2-aminoethane sulfonic acid] at 10mM concentration. The inoculum, an actively growing culture, was filtered through a 0.5 μm polycarbonate “nuclepore” filter to prevent transfer of all but the smallest aggregates. Growth was assessed at specific periods by colony counts and 800 ml samples of organisms were fixed in situ with 2.5% glutaraldehyde for 3 hrs. at 4°C. Washed cells for sectioning were post-fixed in 0.8% OSO4 in veronal-acetate buffer pH 6.1 for 1 hr. at 21°C. HeLa cells were infected with a filtered inoculum of M. pneumoniae and incubated for 9 days in Leighton tubes with coverslips. The cells were then removed and processed for electron microscopy.

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