Long-Range-Ordered Anodic Porous Alumina with Reduced Hole Interval Formed in Highly Concentrated Sulfuric Acid Solution

2006 ◽  
Vol 45 (No. 14) ◽  
pp. L406-L408 ◽  
Author(s):  
Hideki Masuda ◽  
Mitsutaka Nagae ◽  
Takuya Morikawa ◽  
Kazuyuki Nishio
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Long Range ◽  
Sulfuric Acid Solution ◽  
Porous Alumina ◽  
Anodic Porous Alumina ◽  
Concentrated Sulfuric Acid

scholarly journals Evaluation of Corrosion Resistant of Amorphous Fe-Ni-Cr-Ta Alloys in Hot Concentrated Sulfuric Acid Solution

2000 ◽  
Vol 64 (5) ◽  
pp. 367-370
Author(s):  
Hideyuki Ogishi ◽  
Takeshi Suemitsu ◽  
Akira Takashima ◽  
Hyoe Ono ◽  
Hidemi Ukai ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Corrosion Resistant ◽  
Concentrated Sulfuric Acid

Preparation of Porous Alumina by Anodization

2005 ◽  
Vol 23 ◽  
pp. 75-78 ◽  
Author(s):  
C.X. Xu ◽  
X.S. Zhang ◽  
X.W. Sun
Keyword(s):  
Sulfuric Acid ◽  
Oxalic Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Porous Alumina ◽  
Fabrication Process ◽  
Alumina Films ◽  
Anodization Process

The characteristics of porous alumina produced by anodization in both oxalic acid and sulfuric acid solution have been studied. The diameter of the pores for oxalic acid as electrolyte is about 60 nm and for sulfuric acid as electrolyte is about 30 nm. The morphologies of the pores have been improved by two-step anodization process. It has been observed that the temperature and operation voltage are two of the most important factors in the fabrication process of porous alumina films.

Electrically Conductive Composite of Polyaniline and Poly(p-Phenylene-Terephthalamide)

1989 ◽  
Vol 173 ◽  
Author(s):  
Xian-Tong Bi ◽  
C. Wang ◽  
J. S. Bao
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Liquid Crystalline ◽  
Conductive Polymer ◽  
Electrically Conductive ◽  
Electrical Conductivities ◽  
Concentrated Sulfuric Acid ◽  
Electrically Conductive Composite ◽  
Poly Aniline

ABSTRACTThe improvement of the processibility and mechanical properties of poly-aniline (PAn) by processing a concentrated sulfuric acid solution of the mixture of chemically prepared conductive PAn powders and poly(p-phenylene-terephthalamide) (PPTA) in different weight ratios are presented.The concentrated sulfuric acid solution of PAn and PPTA were processed to films and threads, they are liquid crystalline conductive polymer composites, the electrical conductivities of the composites are between 10−4 -10−1 s/cm.PAn enhanced the tensile strength of PPTA, but does not effect the elongation. The morphology of the PPTA/PAn composite surfaces are fiberlike texture.

The Phthalimidomethyl Rearrangement

1990 ◽  
Vol 43 (11) ◽  
pp. 1817 ◽  
Author(s):  
JFK Wilshire
Keyword(s):  
Sulfuric Acid ◽  
Nitrogen Atom ◽  
Carbon Atom ◽  
Acid Solution ◽  
Sulfuric Acid Solution ◽  
Hindered Rotation ◽  
Initial Location ◽  
Concentrated Sulfuric Acid ◽  
Derivatives Of

The discovery of a new acid-catalysed monodentate N → C aromatic rearrangement, namely the phthalimidomethyl rearrangement, is reported. In this rearrangement, discovered during the reaction of N-hydroxymethylphthalimide with certain alkyl N-(4-nitrophenyl)carbamates in concentrated sulfuric acid solution, the phthalimidomethyl group migrates from its initial location on the nitrogen atom of the carbamate function to a carbon atom of the nitrophenyl group. Evidence, provided by an appropriate 'crossover' experiment, indicates that the rearrangement is intermolecular. Hindered rotation about the N(carbamoyl)-aryl bond of the N-phthalimidomethyl derivatives of both ethyl and methyl N-(2,4-dinitrophenyl)carbamate is reported.

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