Structural Study of Very Thin Anodic Alumina Films on Silicon by Anodization in Citric Acid Aqueous Solution

2005 ◽  
Vol 5 (3) ◽  
pp. 454-495 ◽  
Author(s):  
M. Kokonou ◽  
A.G. Nassiopoulou ◽  
K.P. Giannakopoulos ◽  
N. Boukos ◽  
A. Travlos
Keyword(s):  
Aqueous Solution ◽  
Citric Acid ◽  
Structural Study ◽  
Anodic Alumina ◽  
Alumina Films ◽  
Acid Aqueous Solution

Green Electrospinning and Crosslinking of Polyvinyl Alcohol/Citric Acid

2015 ◽  
Vol 32 ◽  
pp. 32-42 ◽  
Author(s):  
Jing Jing Shi ◽  
En Long Yang
Keyword(s):  
Heat Treatment ◽  
Aqueous Solution ◽  
Citric Acid ◽  
Polyvinyl Alcohol ◽  
X Ray Diffraction ◽  
Heat Treated ◽  
Acid Aqueous Solution ◽  
Ft Ir ◽  
Citric Acid Content ◽  
Nanofiber Membranes

The present study reports green electrospinning of polyvinyl alcohol (PVA) / citric acid nanofiber membranes, and the membranes were then crosslinked by heat treatment. The electric conductivity of the PVA aqueous solution increases rapidly and the growth slows down along with the increase of citric acid content. The viscosity of 13 wt% PVA aqueous solutions with citric acid had a small increase and remained stable in one week, which was suitable for electrospinning fibers. Porous, interconnected nonwoven nanofiber membranes were electrospun from a thoroughly mixing of PVA/ citric acid aqueous solution. The membranes were then heat treated at 140 °C for 2 h. The postelectrospinning crosslinked nanofiber membranes were insoluble in water, while the non-crosslinked electrospun nanofiber membranes dissolved instantaneously. FT-IR spectrum, X-ray diffraction, and DSC thermograms reveal that crosslinking of PVA nanofiber membranes occurred through esterfication reaction during heat treatment.

Citric acid modified waste cigarette filters for adsorptive removal of methylene blue dye from aqueous solution

2021 ◽  
pp. 50655
Author(s):  
Aafia Tehrim ◽  
Min Dai ◽  
Xiange Wu ◽  
Malik Muhammad Umair ◽  
Imran Ali ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Citric Acid ◽  
Blue Dye ◽  
Methylene Blue Dye ◽  
Adsorptive Removal

scholarly journals Double-Cross-Linked Networks Based on Methacryloyl Mucin

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1706
Author(s):  
Elena Olăreț ◽  
Brîndușa Bălănucă ◽  
Andra Mihaela Onaș ◽  
Jana Ghițman ◽  
Horia Iovu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aqueous Solution ◽  
Chemical Modification ◽  
Structural Modification ◽  
Aqueous Media ◽  
Cross Linking ◽  
Ph Values ◽  
Acid Aqueous Solution ◽  
Reaction Media ◽  
Double Cross

Mucin is a glycoprotein with proven potential in the biomaterials field, but its use is still underexploited for such applications. The present work aims to produce a synthesis of methacryloyl mucin single-network (SN) hydrogels and their double-cross-linked-network (DCN) counterparts. Following the synthesis of the mucin methacryloyl derivative, various SN hydrogels are prepared through the photopolymerization of methacrylate bonds, using reaction media with different pH values. The SN hydrogels are converted into DCN systems via supplementary cross-linking in tannic acid aqueous solution. The chemical modification of mucin is described, and the obtained product is characterized; the structural modification of mucin is assessed through FTIR spectroscopy, and the circular dichroism and the isoelectric point of methacryloyl mucin is evaluated. The affinity for aqueous media of both SN and DCN hydrogels is estimated, and the mechanical properties of the systems are assessed, both at macroscale through uniaxial compression and rheology tests and also at microscale through nanoindentation tests.

Spectroscopic Investigations of Porous and Sealed Anodic Alumina Films

1989 ◽  
Vol 136 (11) ◽  
pp. 3518-3525 ◽  
Author(s):  
O. J. Murphy ◽  
J. S. Wainright ◽  
J. J. Lenczewski ◽  
J. H. Gibson ◽  
M. W. Santana
Keyword(s):  
Anodic Alumina ◽  
Alumina Films ◽  
Spectroscopic Investigations

Mechanical properties of barrier-type anodic alumina films using nanoindentation

2003 ◽  
Vol 173 (2-3) ◽  
pp. 293-298 ◽  
Author(s):  
G. Alcalá ◽  
S. Mato ◽  
P. Skeldon ◽  
G.E. Thompson ◽  
A.B. Mann ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Anodic Alumina ◽  
Alumina Films ◽  
Barrier Type

Fabrication and Structural Characteristics of Ordered TiO2−Ru(−RuO2) Nanorods in Porous Anodic Alumina Films on ITO/Glass Substrate

2003 ◽  
Vol 107 (37) ◽  
pp. 10180-10184 ◽  
Author(s):  
Song-Zhu Chu ◽  
Kenji Wada ◽  
Satoru Inoue ◽  
Shun-ichi Hishita ◽  
Keiji Kurashima
Keyword(s):  
Glass Substrate ◽  
Structural Characteristics ◽  
Anodic Alumina ◽  
Porous Anodic Alumina ◽  
Alumina Films ◽  
Ito Glass
Sign in / Sign up

Export Citation Format

Share Document