scholarly journals Influence of finish treatment on the durability of aramid fibers aged under an alkaline environment

2010 ◽  
Vol 117 (2) ◽  
pp. 888-898 ◽  
Author(s):  
Guillaume Derombise ◽  
Laëtitia Vouyovitch Van Schoors ◽  
Marie-Fleur Messou ◽  
Peter Davies
Keyword(s):  
Aramid Fibers ◽  
Alkaline Environment ◽  
Finish Treatment

Morphological and physical evolutions of aramid fibers aged in a moderately alkaline environment

2011 ◽  
Vol 123 (5) ◽  
pp. 3098-3105 ◽  
Author(s):  
G. Derombise ◽  
L. Vouyovitch van Schoors ◽  
A. Bourmaud ◽  
P. Davies
Keyword(s):  
Aramid Fibers ◽  
Alkaline Environment

Synthesis, Characterization and in-vitro drug release studies of a macromolecular prodrug of Didanosine.

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
Neeraj Agrawal ◽  
M.J. Chandrasekar ◽  
U.V. Sara ◽  
Rohini A.
Keyword(s):  
Drug Release ◽  
Drug Level ◽  
Drug Release Profile ◽  
Sustained Drug Release ◽  
In Vitro Drug Release ◽  
Alkaline Environment ◽  
Stomach Acid ◽  
Release Studies ◽  
Macromolecular Prodrug

A macromolecular prodrug of didanosine (ddI) for oral administration was synthesized and evaluated for in-vitro drug release profile. Didanosine was first coupled to 2-hydroxy ethyl methacrylate (HEMA) through a succinic spacer to form HEMA-Suc-ddI monomeric conjugate which was subsequently polymerized to yield Poly(HEMA-Suc-ddI) conjugate. The structures of the synthesized compounds were characterized by FT-IR, Mass and 1H-NMR spectroscopy. The prodrug was subjected for in-vitro drug release studies in buffers of pH 1.2 and 7.4 mimicking the upper and lower GIT. The results showed that the drug release from the polymeric backbone takes place in a sustained manner over a period of 24 h and the amount of drug released was comparatively higher at pH 7.4 indicating that the drug release takes place predominantly at the alkaline environment of the lower GIT rather than at the acidic environment of the upper GIT. This pH dependent sustained drug release behavior of the prodrug may be capable of reducing the dose limiting toxicities by maintaining the plasma drug level within the therapeutic range and increasing t1/2 of ddI. Moreover, the bioavailability of the drug should be improved as the prodrug releases ddI predominantly in the alkaline environment which will reduce the degradation of ddI in the stomach acid.

Promising Hybrid Fabrics Based on Carbon and Aramid Fibers as a Reinforcing Filler for Polymer Composites

2020 ◽  
Vol 11 (6) ◽  
pp. 1390-1396
Author(s):  
G. F. Zhelezina ◽  
V. G. Bova ◽  
S. I. Voinov ◽  
A. Ch. Kan
Keyword(s):  
Polymer Composites ◽  
Aramid Fibers ◽  
Reinforcing Filler

A novel mica-based composite with hybrid aramid fibers for electrical insulating applications: largely improved mechanical properties and moisture resistance

2017 ◽  
Vol 67 (2) ◽  
pp. 204-211 ◽  
Author(s):  
Yongsheng Zhao ◽  
Wanbin Dang ◽  
Zhaoqing Lu ◽  
Lamei Wang ◽  
Lianmeng Si ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Moisture Resistance ◽  
Aramid Fibers

Macro-structural Deformation of Kevlar® 40 Aramid Fibers

1987 ◽  
Vol 153 (1) ◽  
pp. 547-552 ◽  
Author(s):  
Eric J. Roche ◽  
S. R. Allen ◽  
C. R. Fincher ◽  
C. Paulson
Keyword(s):  
Structural Deformation ◽  
Aramid Fibers

Surface modification of aramid fibers via ammonia-plasma treatment

2013 ◽  
Vol 131 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Shuang Li ◽  
Keqing Han ◽  
Huaiping Rong ◽  
Xuanzhe Li ◽  
Muhuo Yu
Keyword(s):  
Surface Modification ◽  
Plasma Treatment ◽  
Aramid Fibers ◽  
Ammonia Plasma

Study on the Surface Metallization of Aramid Fibers

2012 ◽  
Vol 503-504 ◽  
pp. 1216-1219
Author(s):  
Long Li ◽  
Xue Yu Hu
Keyword(s):  
Surface Morphology ◽  
Fiber Surface ◽  
Electroless Nickel ◽  
Aramid Fiber ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Aramid Fibers ◽  
Surface Metallization

In this paper, aramid fiber surface metallization was investigated by electroless nickel plating technology. Acid nickel plating and alkaline nickel plating of aramid fiber was compared. Through experiment, it was shown that the temperature of alkaline nickel plating was lower compared with acid nickel plating, and resistance of metalized aramid fibers by alkaline nickel plating was 36.8Ω•cm, and the resistance by acid plating was 51.2Ω•cm. The surface morphology of fibers was observed using SEM

Facile synthesis of hexagonal α-Co(OH)2 nanosheets and their superior activity in selective reduction of nitrocompounds

2021 ◽  
Author(s):  
Jiahui Guo ◽  
Xueqing Feng ◽  
Songrui Wang ◽  
Qikang Wu ◽  
Shanshan Lv ◽  
...  
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Selective Reduction ◽  
Cobalt Hydroxide ◽  
Facile Synthesis ◽  
Alkaline Environment ◽  
Favorable Conditions

A novel hexagonal α-cobalt hydroxide nanosheets are synthesized through 2-methylimidazole induced hydrolysis strategy with cetyltrimethylammonium bromide (CTAB) as surfactant. The weak alkaline environment provides favorable conditions for the formation of...

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