Preparation and Characterization of AlOOH/Polyimide Nanocomposite Membrane

2011 ◽  
Vol 412 ◽  
pp. 406-409
Author(s):  
Hai Da Liao ◽  
Wei Ping Zhang ◽  
Xiao Ming Sun ◽  
Fang Fang Wang ◽  
Xin Si Lan
Keyword(s):  
Particle Size ◽  
Raw Material ◽  
Nanocomposite Membrane ◽  
Transmission Property ◽  
Hydrothermal Crystallization ◽  
Nanocomposite Membranes ◽  
Charge Process ◽  
Polyimide Nanocomposite ◽  
Polyimide Matrix

Using metallurgical grade aluminum hydroxide as the raw material self-dispersed g-AlOOH nanopowders were made by sol-hydrothermal crystallization and the charge process. The AlOOH/polyimide nanocomposite membrane was prepared by compounding soluble polyamide with AlOOH using sol dispersed quasi-homogeneous blending and compounding method. TEM, XRD, IR and other techniques were employed to characterize AlOOH nanopowders and AlOOH/polyimide nanocomposite membranes, respectively. The results showed that: the particle size of AlOOH crystal was about 70nm, with good self-dispersion in water and some organic solvents; in the polyimide matrix, the AlOOH was dispersed at nanoscale, without agglomeration; when its content in composite membrane reached 15 %, it still had a good dispersion and transmission property.

scholarly journals Utilization and Characterization of Oyster Shell as Chitosan and Nanochitosan

2018 ◽  
Vol 21 (4) ◽  
pp. 224-231
Author(s):  
Lia Handayani ◽  
Faisal Syahputra ◽  
Yayuk Astuti
Keyword(s):  
Particle Size ◽  
Morphological Analysis ◽  
Oyster Shell ◽  
Tween 80 ◽  
Raw Material ◽  
Initial Weight ◽  
Deacetylation Degree ◽  
Chitosan Particle

Oyster is one of bivalve groups widely consumed by human, thus, it results in producing huge waste shells affecting the environment. One way to increase the value of oyster shells is to process them into chitosan. This study aims to isolate chitin then synthesize it into chitosan and convert chitosan into nano-sized chitosan and analyze the characteristics. The steps to produce chitosan from waste shells included demineralization using HCl 1 N and deproteinization using NaOH 3%. The next step was to convert chitin into chitosan through a deacetylation process using NaOH 50%. After chitosan was formed, it was continued to convert chitosan into nano chitosan particles using ion gelation method with the addition of surfactant (tween 80) and crosslinker (TPP 0.1% and 0.5%). The results showed that yield of transformation chitin into chitosan was 61.1%. Meanwhile, the yield calculated from initial weight of raw material was 18.33% with deacetylation degree value equal to 89.14%. Based on morphological analysis using SEM, the size of chitosan particles was not distributed homogeneously that was in the range of 892 nm-1.54 μm, while the nano chitosan particle size obtained was uniformly formed in the range of 679 nm-910 nm.

Production of Foundry Filters Using Al2O3 from the Al-Anodizing Process

2010 ◽  
Vol 62 ◽  
pp. 119-124 ◽  
Author(s):  
Graziela G. de Moraes ◽  
Bianca G. Oliveira ◽  
Cristina Siligardi ◽  
Murilo Daniel de Mello Innocentini ◽  
Amir A.M. Oliveira Jr. ◽  
...  
Keyword(s):  
Particle Size ◽  
Raw Materials ◽  
Raw Material ◽  
Industrial Processes ◽  
High Alumina ◽  
Secondary Products ◽  
Ceramic Filters ◽  
Application Potential ◽  
Aluminum Anodizing

The manufacturing and materials transformation industries generate residues, which do not always have an adequate ecological destination. In many cases, however, these secondary products can be directly re-used as raw materials in other industrial processes. In this context, this article presents the characterization of the sludge generated in the aluminum anodizing process and emphasizes the application potential of this residue as a raw material for the production of industrial ceramic filters. Results show that the high alumina contents (89-96 wt%) and composition constancy, as well as the low particle size (~1 m) after calcination and milling, render this residue a suitable raw material to produce alumina filters with optimized properties for casting engineering metal components with better performance.

Research on New Technology to Prepare Magnesium Hydroxide from Magnesium Sulphate

2014 ◽  
Vol 900 ◽  
pp. 181-186
Author(s):  
Long You ◽  
Qian Qiao
Keyword(s):  
Particle Size ◽  
Magnesium Hydroxide ◽  
New Technology ◽  
Raw Material ◽  
Synthesis Process ◽  
Optimum Temperature ◽  
Particle Size Analyzer ◽  
One Step ◽  
Temperature Water

This work took Magnesium Sulfate (MgSO4) as raw material to research the influence of different surfactants and the concentration of the same surfactants on the final morphology of Magnesium Hydroxide (Mg(OH)2) in one-step synthesis process. And the analysis and characterization of the products by particle size analyzer and etc were also conducted. The research demonstrated that the polyethylene glycol would be the best surfactant, the optimum value for surfactant would be 3% of the obtained Mg(OH)2, and the optimum temperature water bath would be 50°C. With the above optimized condition parameters, the nanoscale Mg(OH)2procucts with flake morphology, high pure and well dispersion were obtained.

Physical Characterization of Ukpor and Ahoko Clay Deposits for use as Industrial Raw Material

2007 ◽  
Vol 18-19 ◽  
pp. 241-247
Author(s):  
E.J. Eterigho ◽  
M.A. Olutoye
Keyword(s):  
Particle Size ◽  
Specific Gravity ◽  
Particle Size Distribution ◽  
Physical Properties ◽  
Size Distribution ◽  
Drying Shrinkage ◽  
Industrial Applications ◽  
Raw Material ◽  
Clay Deposits

The physical properties of some Nigerian clays were studied in order to determine their suitability for a variety of industrial applications. From the analysis, the specific gravity of Ukpor and Ahoko clays were 1.89 and 2.26 respectively and the Plasticity Index 26.05% and 22.45%, drying shrinkage was 18.90% and 8.2% and particle size distribution showed that the samples are clays. The results show that the physical properties of the clays are within the specifications for kaolin clays and are suitable for industrial uses.

Characterization of Heat-Resistant Geocement Based on Potassium Silica Solution

2013 ◽  
Vol 378 ◽  
pp. 230-234
Author(s):  
Tomáš Kovářík ◽  
Jaroslav Kadlec ◽  
Michal Pola ◽  
Pavel Novotný ◽  
Stanislava Podmanická ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Particle Size ◽  
Thermal Properties ◽  
Raw Material ◽  
Mechanical And Thermal Properties ◽  
Accurate Identification ◽  
Heat Resistant ◽  
Silica Solution ◽  
Temperature Rate

The aim of this paper is detailed description of synthesis geocement composite material based on K2O-Al2O3-SiO2 system and characterization its thermal properties. The series of analytic tools were used (XRF, XRD, SEM, BET, particle-size distribution) for accurate identification of chemical and physical properties of raw material. Optimum technological prescription was determined and geocement specimens were tested for identification of mechanical and thermal properties. Three series of specimens were heated up to 1000, 1100 and 1230°C and flexural strength was determined. The thermal analysis TMA and DMA were used for characterization of heat-resistant properties. The maximum shrinkage in the range 30-1000°C was for the first run in temperature rate 20°C/min. only 3%. The heating exposure at slower rate (3°C/min.) caused reduction of shrinkage up to 1.5% at 1000°C. Geocement represents attractive thermal properties.

scholarly journals Green Synthesis Nanopartikel Perak (Agnps) Terkonjugasi Etil Parametoksi Sinamat (Epms) sebagai Bahan Tabir Surya

2018 ◽  
Vol 4 (2) ◽  
pp. 98-105
Author(s):  
Agustina Agustina ◽  
Munawarah Munawarah ◽  
Stefanus Agustinus Lumi ◽  
Syamsu Nur
Keyword(s):  
Particle Size ◽  
Green Synthesis ◽  
Average Diameter ◽  
Raw Material ◽  
Uv Exposure ◽  
Wave Number ◽  
Ftir Analysis ◽  
Natural Materials ◽  
Kaempferia Galanga

Green Synthesis is a method to make silver nanoparticles (AgNPs) by utilizing natural materials as bioreductors. One of the natural materials that can reduce metal ions is Kaempferia galanga rhizome because it has a chemical component that can penetrate the metal. The compounds are ethyl paramethoxycinnamate (EPMC) which is used as sunscreen. This study aims to produce AgNPs conjugated with EPMC that can be used as raw material sunscreen. This study was conducted by extracting EPMS from the Kaempferia galanga rhizome and synthesizing the AgNPs conjugated with EPMC. The synthesis results were characterized by UV-Vis Spectrophotometry, FTIR, SEM, PSA and sunscreen activity. Extracted result was obtained crystalline is ethyl paramethoxycinnamate compound with yield 2,3%. The characterization of EPMC with UV-Vis spectrophotometer was obtained maximum wavelength of 308 nm and FTIR analysis result at wave number 1701,27 cm-1 indicated the presence of carbonyl group (C = O) and 1165,97 cm-1 presence of C-O and showed specific characteristic from EPMS. Characterization of AgNPs using Uv-Vis spectrophotometer was obtained maximum wavelength of 469 nm. Characterization of AgNPs using SEM are spherical and monodispers forms.  Then, particle size using PSA obtained an average diameter of 182 nm. AgNPs conjugated with EPMS has a sunscreen activity with sunblock category and successfully provide protection against UV exposure at low concentration (200 ppm) categorized as ultra protection with SPF value 36,4.

scholarly journals Mineralogical and Thermal Characterization of Kaolinitic Clays from Terra Alta (Catalonia, Spain)

Minerals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 142
Author(s):  
Maite Garcia-Valles ◽  
Pura Alfonso ◽  
Salvador Martínez ◽  
Núria Roca
Keyword(s):  
Particle Size ◽  
Chemical Composition ◽  
Particle Size Distribution ◽  
Construction Materials ◽  
Thermal Characterization ◽  
Refractory Clay ◽  
Raw Material ◽  
Plastic Clays ◽  
Fluxing Agent

This research characterizes the kaolinitic clays from Cretaceous–Paleocene lateritic deposits of Terra Alta (south Catalonia) to evaluate their possible applications. The outcrops and quarries belong to the Horta de Sant Joan and Pinell de Brai areas. The chemical composition, mineralogy, rheological behavior, particle size distribution and plasticity are determined. The Fe and Ti4+ contents prevent them from being directly used as raw material for white ceramics. The mineralogy consists of kaolinite with quartz, illite, hematite, and minor K-feldspar and calcite. Most of the area comprises medium plastic clays that are classified as fired clays and can be used as ceramic and construction materials. In Horta de Sant Joan, a kaolinitic-rich level, up to 75 wt % of kaolinite, is highly crystalline with low plasticity and can be classified as flint clay, useful as a refractory clay. The evaluated kaolinitic clays can also be used to obtain a triaxial ceramic when they are mixed with feldspar to act as a fluxing agent and chamotte.

Synthesis and characterization of sodalite–polyimide nanocomposite membranes

2009 ◽  
Vol 126 (1-2) ◽  
pp. 14-19 ◽  
Author(s):  
Dan Li ◽  
Huai Yong Zhu ◽  
Kyle R. Ratinac ◽  
Simon P. Ringer ◽  
Huanting Wang
Keyword(s):  
Synthesis And Characterization ◽  
Nanocomposite Membranes ◽  
Polyimide Nanocomposite
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