Biodegradability Improvement and Structural Conversion of Polyvinyl Alcohol (PVA) by Sub- and Supercritical Water Reaction

2004 ◽  
Vol 37 (6) ◽  
pp. 744-750 ◽  
Author(s):  
Kyoungrean Kim ◽  
Masafumi Fujita ◽  
Hiroyuki Daimon ◽  
Koichi Fujie
Keyword(s):  
Polyvinyl Alcohol ◽  
Supercritical Water ◽  
Structural Conversion ◽  
Biodegradability Improvement

Co-Oxidation Effects of Methanol on Reactive Orange 7 and Polyvinyl Alcohol in Supercritical Water

2013 ◽  
Vol 788 ◽  
pp. 258-262
Author(s):  
Jie Zhang ◽  
Shu Zhong Wang ◽  
Yan Meng Gong ◽  
Yan Hui Li ◽  
Jia Ming Lu
Keyword(s):  
Organic Carbon ◽  
Polyvinyl Alcohol ◽  
Total Organic Carbon ◽  
Co Oxidation ◽  
Supercritical Water ◽  
Water Oxidation ◽  
Supercritical Water Oxidation ◽  
Negative Effects ◽  
Reactive Orange ◽  
Inhibition Reaction

Methanol acting as co-oxidation component was introduced in supercritical water oxidation experiments of Reactive Orange 7 and polyvinyl alcohol. Experiments were performed at 673K and 25MPa. The concentrations of Reactive Orange 7 and polyvinyl alcohol were constant at 5wt% and 1wt%, respectively, with increasing methanol concentrations. For the binary mixture of methanol/ Reactive Orange 7, the experiment results showed that the total nitrogen and total organic carbon removals in the mixture were higher than that in the absence of methanol, and as methanol concentration increased, the accelerating effect was more notable. For methanol/polyvinyl alcohol mixture experiment, at the oxidation coefficient of 2.0, the presence of methanol (0.2-1.5 wt%) accelerated the decomposition rates of polyvinyl alcohol and total organic carbon, while methanol addition showed negative effects at the oxidation coefficient of 1.05. The inhibition reaction was attributed to the increment in induction time of polyvinyl alcohol oxidation in the presence of methanol.

Cryogels based on composition chitosan–polyvinyl alcohol: synthesis and properties

2019 ◽  
Vol 5 (4) ◽  
pp. 56-63
Author(s):  
E.V. Dikhtiaruk ◽  
◽  
V.V. Paientko ◽  
A.K. Matkovsky ◽  
Yu.N. Nichiporuk ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Alcohol Synthesis

Synthesis and Characterisation of Polyaniline-Polyvinyl Alcohol-NiO Nanocomposite Film

2011 ◽  
Vol 3 (8) ◽  
pp. 91-93 ◽  
Author(s):  
Sindhu Honmute ◽  
◽  
Arunkumar Lagashetty ◽  
A. Venkataraman A. Venkataraman
Keyword(s):  
Polyvinyl Alcohol ◽  
Nanocomposite Film

Degradable properties of compositions based on polyethylene and plasticized polyvinyl alcohol

2019 ◽  
Vol 41 (4) ◽  
pp. 246-252
Author(s):  
T.V. Dmytriieva ◽  
◽  
S.K. Krymovska ◽  
V.I. Bortnytskyi ◽  
S.M. Kobylinskyi ◽  
...  
Keyword(s):  
Polyvinyl Alcohol
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