Influence of a blend of guar gum and poly(vinyl alcohol) on long term stability, and antibacterial and antioxidant efficacies of silver nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (67) ◽  
pp. 54059-54069 ◽  
Author(s):  
Tamalika Das ◽  
Sabina Yeasmin ◽  
Somanjana Khatua ◽  
Krishnendu Acharya ◽  
Abhijit Bandyopadhyay
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Guar Gum ◽  
Antioxidant Properties ◽  
Poly Vinyl Alcohol ◽  
Term Stability ◽  
Long Term Stability

A blend of guar gum and poly(vinyl alcohol) reduced and stabilized incipient silver nanoparticles which could be stored for 60 days. Silver nanoparticles also exhibited good antibacterial and antioxidant properties.

Improvements in the long-term stability of a LiCl dew-point sensor using cross-linked porous poly(vinyl alcohol) film

2004 ◽  
Vol 97 (1) ◽  
pp. 74-80 ◽  
Author(s):  
Masanobu Matsuguchi ◽  
Toshiyuki Uno ◽  
Ayumi Yamanaka ◽  
Takaaki Kuroiwa ◽  
Tsutomu Ogura ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Dew Point ◽  
Poly Vinyl Alcohol ◽  
Term Stability ◽  
Long Term Stability ◽  
Porous Poly

scholarly journals Long-term stabilization of hydrogen peroxide by poly(vinyl alcohol) on paper-based analytical devices

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Tuchpongpuch Boonpoempoon ◽  
Wanida Wonsawat ◽  
Takashi Kaneta
Keyword(s):  
Hydrogen Peroxide ◽  
Vinyl Alcohol ◽  
Point Of Care ◽  
Enzymatic Reaction ◽  
Poly Vinyl Alcohol ◽  
Paper Substrate ◽  
Long Term Stability ◽  
Colorimetric Measurements ◽  
The Stability

Abstract Stabilizing reagents that can be deposited onto paper is an important issue for researchers who depend on paper-based analytical devices (PADs), because long-term stability of the devices is essential in point-of-care testing. Here, we found that poly(vinyl alcohol) (PVA) would stabilize hydrogen peroxide placed on a paper substrate following exposure to air. Horseradish peroxidase was employed as a sample in colorimetric measurements of PADs after hydrogen peroxide and 3,3′,5,5′-tetramethylbenzidine were deposited as substrates in an enzymatic reaction. The addition of PVA to hydrogen peroxide significantly suppressed its degradation. Concentrations of PVA that ranged from 0.5 to 2%, increased the duration of the stability of hydrogen peroxide, and the results for a PVA concentration of 1% approximated those of 2% PVA. Storage of the PADs at 4 °C in a refrigerator extended the stability of the hydrogen peroxide containing 2% PVA by as much as 30 days. The stability of hydrogen peroxide without PVA was degraded after one day under room temperature.

scholarly journals Functionalized-AgNPs for Long-Term Stability and Its Applicability in the Detection of Manganese Ions

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Van-Tuan Hoang ◽  
Mai Mai ◽  
Le Thi Tam ◽  
Ngoc Phan Vu ◽  
Nguyen Tien Khi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Aqueous Dispersion ◽  
Tween 80 ◽  
Strong Interactions ◽  
Electrostatic Repulsion ◽  
Practical Applications ◽  
Term Stability ◽  
Long Term Stability ◽  
Long Time

In this study, silver nanoparticles (AgNPs) were functionalized by various molecules, including sodium borohydride (NaBH4), polyhexamethylene biguanide hydrochloride (PHMB), and Tween 80 to investigate the long-term stabilization of AgNPs in an aqueous dispersion. PHMB-functionalized silver nanoparticles (AgNPs/PHMB) exhibited better stability than others and could be stored at ambient temperature for at least 180 days. In addition to creating stabilization based on the electrostatic repulsion, the use of PHMB helped to increase the degree of stability of the colloidal AgNPs for a long time owing to strong interactions between Ag atoms on AgNPs with nitrogen (N) positions in PHMB molecules. The formed bond led to improving maintenance ability of the electrostatic repulsion layer among independent nanoparticles. The applicability of the as-prepared AgNPs/PHMB was also examined for Mn2+ detection via a colorimetric approach. The calibration curve was found to be linear over the range of 0–100 mM with a correlation coefficient of 0.97. The amine groups of PHMB brought out a cooperative effect to form of ion-templated chelation with Mn2+, which caused the aggregation of AgNPs/PHMB. This suggested that the AgNPs/PHMB could be used as a potential probe in the detection of Mn2+ ions. More importantly, the long-term stability of AgNPs/PHMB paved a great promising path to provide many further solutions for the producer in practical applications.

scholarly journals Influence of Disinfectants on Natural Textile Fibres

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Klára Drábková ◽  
Jan Krejčí ◽  
Markéta Škrdlantová ◽  
Michal Ďurovič ◽  
Bronislava Bacílková
Keyword(s):  
Silver Nanoparticles ◽  
Tensile Strength ◽  
Ethylene Oxide ◽  
Artificial Ageing ◽  
Colour Difference ◽  
Term Stability ◽  
Long Term Stability ◽  
Dry Heat ◽  
Textile Fibres

Abstract Textiles are frequently used in bookbinding or for attaching pendent seals and thus they are an integral part of archival and library items. Any part of these items can be contaminated by various microorganisms. Consequently, it is often necessary to include disinfection procedures in the initial stages of the conservation process. Primarily, the agents employed in conservation must not harm the treated material. This work was concerned with monitoring the effect of selected disinfectant agents (ethylene oxide, Septonex®, glutaraldehyde, Bacillol® AF, butanol vapours, Acticide® MV, silver nanoparticles, Chiroseptol®) on the properties and long-term stability of natural textile fibres (cotton and silk). The disinfected textiles were subjected to three kinds of artificial ageing (dry heat, moist heat, and light) and their properties were determined by means of the total colour difference, thread tensile strength and the limiting viscosity number.

Synthesis, stabilization, growth behavior, and catalytic activity of highly concentrated silver nanoparticles using a multifunctional polymer in an aqueous-phase

RSC Advances ◽  
2015 ◽  
Vol 5 (36) ◽  
pp. 28652-28661 ◽  
Author(s):  
Aasim Shahzad ◽  
Woo-Sik Kim ◽  
Taekyung Yu
Keyword(s):  
Silver Nanoparticles ◽  
Catalytic Activity ◽  
Aqueous Phase ◽  
Ag Nanoparticles ◽  
Growth Behavior ◽  
Term Stability ◽  
Long Term Stability

Highly concentrated Ag nanoparticles (above 20 g L−1) synthesized by the reaction AgNO3 with BPEI exhibited long-term stability over more than 40 days.

Shape control of silver nanoparticles and their stability on Al2O3

2020 ◽  
Vol 8 (31) ◽  
pp. 10755-10760 ◽  
Author(s):  
Graham C. Beaton ◽  
Adam J. Bottomley ◽  
Daniel Prezgot ◽  
Anatoli Ianoul ◽  
Kevin G. Stamplecoskie
Keyword(s):  
Silver Nanoparticles ◽  
Aluminum Oxide ◽  
Shape Control ◽  
Colloidal Suspensions ◽  
Term Stability ◽  
Long Term Stability

Colloidal suspensions and films of aluminum oxide afford long-term stability to silver nanoparticles and play an important role in their light driven shape conversion.

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