Antibacterial cellulose composite membranes prepared in ionic liquid via phase inversion method

2017 ◽  
Vol 33 (4) ◽  
pp. 678-683 ◽  
Author(s):  
Shenghan Gao ◽  
Ruichang Gao
Keyword(s):  
Ionic Liquid ◽  
Phase Inversion ◽  
Composite Membranes ◽  
Inversion Method ◽  
Phase Inversion Method ◽  
Cellulose Composite

Preparation of Uniform Microcapsules Containing Ionic Liquid for Caprolactam Extraction

2012 ◽  
Vol 557-559 ◽  
pp. 619-623 ◽  
Author(s):  
Dong Xuan Chen ◽  
Xiao Kun OuYang ◽  
Yang Guang Wang ◽  
Li Ye Yang ◽  
Di Yu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Ionic Liquid ◽  
Phase Inversion ◽  
Extraction Process ◽  
Inversion Method ◽  
Nitrogen Gas ◽  
Thermogravimetric Analyzer ◽  
Particle Size Analyzer ◽  
Phase Inversion Method

Microencapsulating ionic liquid is an effective way to overcome the loss of ionic liquid in the extraction process. A phase inversion method was used to form microcapsules containing 1-butyl-3-methylimidazolium hexafluorophosphate [BMIM] [PF6]. The oil phase, composed of [BMIM][PF6], polysulfone and dichloromethane, was dropped into the 0.2 wt% gelatin aqueous solution using nitrogen gas pressure to form droplets. As dichloromethane evaporated completely, polysulfone microcapsules containing [BMIM] [PF6] were obtained. The microcapsules were characterized using a polarizing microscope, a laser particle size analyzer and a thermogravimetric analyzer. Moreover the microcapsules were performed some effect on caprolactam extraction from water.

scholarly journals Preparation and properties of cellulose membranes with graphene oxide addition

2017 ◽  
Vol 19 (4) ◽  
pp. 41-49 ◽  
Author(s):  
Beata Fryczkowska ◽  
Kamil Wiechniak
Keyword(s):  
Graphene Oxide ◽  
Phase Inversion ◽  
Chemical Properties ◽  
Composite Membranes ◽  
Inversion Method ◽  
Permeate Flux ◽  
Oxide Addition ◽  
Physico Chemical ◽  
Cellulose Membranes ◽  
Phase Inversion Method

Abstract The paper presents results of research on the preparation of cellulose membranes with graphite oxide addition (GO/CEL). Initially, a cellulose (CEL) solution in 1-ethyl-3-methylimidazole acetate (EMIMAc) was obtained, to which graphene oxide (GO) dispersed in N,N-dimethylformamide (DMF) was added. From this solution, composite membranes were formed using phase inversion method. It was observed that the GO addition influences the physico-chemical properties of GO/CEL composite membranes, resulting in an increase in their mass per unit area, thickness and density, and a decrease in sorption properties. In addition, the study of transport properties has shown that GO/CEL membranes do not absorb BSA particles on their surface, which prevents the unfavorable phenomenon of fouling. An important feature of the obtained membranes is the specific permeate flux which reaches high values (~124 L/m2×h) at 3.8% of the GO addition to the cellulose matrix.

scholarly journals Properties and Structure of Cellulosic Membranes Obtained from Solutions in Ionic Liquids Coagulated in Primary Alcohols

2018 ◽  
Vol 18 (3) ◽  
pp. 232-242
Author(s):  
Beata Fryczkowska ◽  
Małgorzata Kowalska ◽  
Dorota Biniaś ◽  
Czesław Ślusarczyk ◽  
Jarosław Janicki ◽  
...  
Keyword(s):  
Cross Sections ◽  
Phase Inversion ◽  
Composite Membranes ◽  
Skin Layer ◽  
The Other ◽  
Inversion Method ◽  
Primary Alcohols ◽  
Membrane Surfaces ◽  
Phase Inversion Method ◽  
Scanning Electron

Abstract This paper presents the results of studies on the preparation of cellulosic membranes, from a solution in 1-ethyl-3- methylimidazolium acetate (EMIMAc), using the phase inversion method. Initially, the membranes were obtained by coagulation of the polymer film in water and primary alcohols (methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol), 1-hexanol, 1-octanol) resulting in membranes with significantly differing morphologies. Subsequently, composite membranes were produced, with the support layer being a membrane with the largest pores, and the skin layer a membrane with smaller pores. The resulting membranes were tested for physicochemical and transport properties. The morphology of the membrane surfaces and their cross-sections were investigated by using a scanning electron microscope (SEM). The structure of the membranes, on the other hand, was investigated by FTIR spectroscopy and WAXS structural analysis.

scholarly journals Modifications of polyethersulfone membrane by doping sulfated-TiO2 nanoparticles for improving anti-fouling property in wastewater treatment

RSC Advances ◽  
2017 ◽  
Vol 7 (54) ◽  
pp. 33822-33828 ◽  
Author(s):  
Jing Guo ◽  
Jeonghwan Kim
Keyword(s):  
Wastewater Treatment ◽  
Tio2 Nanoparticles ◽  
Phase Inversion ◽  
Composite Membranes ◽  
Inversion Method ◽  
Polyethersulfone Membrane ◽  
Sulfated Tio2 ◽  
Phase Inversion Method

Polyethersulfone (PES) composite membranes mixed with sulfated-TiO2 nanoparticles were fabricated using a non-solvent induced phase inversion method.

scholarly journals Use of Silica Gel from Volcanic Ash as Chitosan Composite Membrane’s Filler

2019 ◽  
Vol 31 (10) ◽  
pp. 2303-2305
Author(s):  
Maulida Lubis ◽  
Lilis Sukeksi ◽  
Mara Bangun Harahap ◽  
Melva Ginting ◽  
Herlinawati Wici ◽  
...  
Keyword(s):  
Water Absorption ◽  
Silica Gel ◽  
Composite Membrane ◽  
Phase Inversion ◽  
Volcanic Ash ◽  
Composite Membranes ◽  
Inversion Method ◽  
Stirring Time ◽  
Phase Inversion Method ◽  
Chitosan Composite

This study aims to determine the process of making composite membranes of chitosan and silica fillers from volcanic ash of Sinabung mountain and determine the physical properties of chitosan composite membranes viz. degree of water absorption, functional groups. In this study, composite membranes were made using phase inversion method with the composition of chitosan and silica used were 2 g of chitosan and variations in dosage of fillers 0.6, 0.9 and 1.2 g of silica, while the stirring time was 8, 12 and 16 h. Based on the results , the best membrane conditions were obtained from composite membrane analysis with the best conditions of composite membranes at water absorption is 44.58 %. From the results of FTIR analysis, indicated the presence of OH bonds and Si-O-Si bonds on composite membranes caused by silica gel characteristics of composite membranes also supported by EDX analysis showed composite membrane contained carbon 55.17 %, oxygen 20.36 % and silicon 10.42 %.

A straight, open and macro-porous fuel electrode-supported protonic ceramic electrochemical cell

2021 ◽  
Author(s):  
Yuxin Pan ◽  
Kai Pei ◽  
Yucun Zhou ◽  
Tong Liu ◽  
Meilin Liu ◽  
...  
Keyword(s):  
Phase Inversion ◽  
Electrochemical Cell ◽  
Inversion Method ◽  
Phase Inversion Method

A straight, open and macro-porous Ni–BaZr0.1Ce0.7Y0.1Yb0.1O3 fuel electrode-supported protonic ceramic electrochemical cell has been fabricated by a modified phase-inversion method.

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