Characterization of Porous Anodic Aluminium Oxide Film on Aluminium Templates Formed in Anodizing Process

A porous anodic aluminium oxide (AAO) films were successfully fabricated on aluminium templates by using anodizing technique. The anodizing process was done in the mixed acid solution of phosphoric acid and acetic acid. The growth, morphology and chemical composition of AAO film were investigated. During the anodizing process, the growth of the oxide pores was strictly influenced by the anodizing parameters. The anodizing was done by varying the voltage at 70 V to 130 V and temperature from 5 °C to 25 °C. The electrolyte concentration was remaining constant. In this study, all the samples were characterized using scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques. From this study, the optimum parameters to obtain porous AAO film with the mixture of phosphoric acid and acetic acid solution can be known.

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A Study on the Effect of Modified Electrolyte to the Formation of AAO Membrane in Anodising Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.795.223 ◽

2013 ◽

Vol 795 ◽

pp. 223-227

Author(s):

Juyana A. Wahab ◽

Muhamad Nur Misbah ◽

Nurul Diyana Jamil ◽

Mohd Nazree Derman

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Acetic Acid ◽

Phosphoric Acid ◽

Organic Acid ◽

Aluminium Oxide ◽

Mixed Electrolyte ◽

Anodic Aluminium Oxide ◽

Concentration Time ◽

Scanning Electron

The formation of anodic aluminium oxide (AAO) membrane in anodising process has been studied. The anodising process was done in two different type of electrolyte which are single phosphoric acid and a mixture of phosphoric acid and acetic acid. This study was done to determine the influence of this mixed electrolyte toward the formation of AAO membrane. The anodising voltage was control from 90V to 130V while concentration, time, and temperature were kept constant at 1M, 60 minute and 15°C respectively. The characterisation of the AAO membrane was done by using scanning electron microscopy (SEM). The results of this study confirm that the addition of organic acid in the acidic based electrolyte resulted to the larger pores size of AAO membrane.

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Development and Characterization of β- Tricalcium Phosphate Cements Containing Chitosan

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.309-311.845 ◽

2006 ◽

Vol 309-311 ◽

pp. 845-848 ◽

Cited By ~ 1

Author(s):

Marina S. Tonoli ◽

Claudinete V. Leal ◽

Cecília A.C. Zavaglia ◽

Marisa Masumi Beppu

Keyword(s):

Acetic Acid ◽

Calcium Phosphate ◽

Phosphoric Acid ◽

Acid Solution ◽

Acetic Acid Solution ◽

Chitosan Solution ◽

Phosphoric Acid Solution ◽

Mechanical Resistance ◽

Total Acid

Cements were prepared by mixing the calcium phosphate (β-TCP) with phosphoric acid solution (2.6M) and chitosan solution (2.5% in acetic acid solution) that was added in different proportions, ranging from 1 to 50% of total acid solution amount. Observations using SEM showed that the used of chitosan increased the interconnectivity of grains in the final cement, although the mechanical resistance to compression decreased from approximately 3 to 1 MPa. Probably the chitosan macromolecule is able to form a more interconnected net.

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Some Approaches to Viscometric Study of Chitosan in Acetic Acid Solution

Chemistry & Chemical Technology ◽

10.23939/chcht10.02.135 ◽

2016 ◽

Vol 10 (2) ◽

pp. 135-139 ◽

Cited By ~ 3

Author(s):

Valentina Chernova ◽

◽

Angela Shurshina ◽

Elena Kulish ◽

Gennady Zaikov ◽

...

Keyword(s):

Acetic Acid ◽

Acid Solution ◽

Intrinsic Viscosity ◽

Acetic Acid Solution ◽

Conformational State ◽

Macromolecular Coil ◽

Degree Of Swelling ◽

Current Value ◽

Viscometric Study

Some ways of estimating the values of the intrinsic viscosity of chitosan were analyzed. It was shown that the method of Irzhak and Baranov for estimating the current value of the intrinsic viscosity allows to adequately estimates the conformational state of the macromolecular coil and its degree of swelling.

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