Epoxidised soybean oil–Cu/Cu2O bio-nanocomposite material: synthesis and characterization with antibacterial activity

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 38906-38912 ◽  
Author(s):  
Machhindra S. Bhalerao ◽  
Anand V. Patwardhan ◽  
Manohar A. Bhosale ◽  
Vaishali M. Kulkarni ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Antibacterial Activity ◽  
Soybean Oil ◽  
Ultrasound Irradiation ◽  
Nanocomposite Material ◽  
Synthesis And Characterization ◽  
Material Synthesis

A facile approach for the synthesis of a novel epoxidised soybean oil–Cu/Cu2O (ESO–Cu/Cu2O) bio-nanocomposite material via ultrasound irradiation with antibacterial activity was investigated.

Synthesis and characterization of nanocrystalline CoWO4@silk fibers with antibacterial activity under ultrasound irradiation

2013 ◽  
Vol 14 (4) ◽  
pp. 687-692 ◽  
Author(s):  
Azadeh Azadbakht ◽  
Amir Reza Abbasi ◽  
Nourolah Noori ◽  
Ezzat Rafiee ◽  
Mojtaba Taran
Keyword(s):  
Antibacterial Activity ◽  
Ultrasound Irradiation ◽  
Synthesis And Characterization ◽  
Silk Fibers

scholarly journals Synthesis and characterization of different soybean oil-based polyols with fatty alcohol and aromatic alcohol

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 491-499
Author(s):  
Fukai Yang ◽  
Hao Yu ◽  
Yuyuan Deng ◽  
Xinyu Xu
Keyword(s):  
Molecular Weight ◽  
Soybean Oil ◽  
Retention Time ◽  
Ring Opening ◽  
Isoamyl Alcohol ◽  
Synthesis And Characterization ◽  
Intermolecular Force ◽  
H Nmr ◽  
Epoxy Groups

Abstract In this article, five kinds of soybean oil-based polyols (polyol-E, polyol-P, polyol-I, polyol-B, and polyol-M) were prepared by ring-opening the epoxy groups in epoxidized soybean oil (ESO) with ethyl alcohol, 1-pentanol, isoamyl alcohol, p-tert-butylphenol, and 4-methoxyphenol in the presence of tetrafluoroboric acid as the catalyst. The SOPs were characterized by FTIR, 1H NMR, GPC, viscosity, and hydroxyl numbers. Compared with ESO, the retention time of SOPs is shortened, indicating that the molecular weight of SOPs is increased. The structure of different monomers can significantly affect the hydroxyl numbers of SOPs. Due to the large steric hindrance of isoamyl alcohol, p-hydroxyanisole, and p-tert-butylphenol, SOPs prepared by these three monomers often undergo further dehydration to ether reactions, which consumes the hydroxyl of polyols, thus forming dimers and multimers; therefore, the hydroxyl numbers are much lower than polyol-E and polyol-P. The viscosity of polyol-E and polyol-P is much lower than that of polyol-I, polyol-B, and polyol-M. A longer distance between the molecules and the smaller intermolecular force makes the SOPs dehydrate to ether again. This generates dimer or polymers and makes the viscosity of these SOPs larger, and the molecular weight greatly increases.

Electrospun PU/MgO/Ag Nanofibers for Antibacterial Activity and Flame Retardency

2021 ◽  
pp. 0887302X2110094
Author(s):  
V. Mamtha ◽  
H. N. Narasimha Murthy ◽  
V. Pujith Raj ◽  
Prashantha Tejas ◽  
C. S. Puneet ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Melting Point ◽  
Protective Clothing ◽  
Electrospun Nanofibers ◽  
Synthesis And Characterization ◽  
Zone Of Inhibition ◽  
Solution Combustion ◽  
E Coli ◽  
Afterglow Time

Antibacterial activity and fire retardation are equally desired for protective clothing. For achieving this, AgNP and MgO are independently researched as nanofillers in Polyurethane based electrospun nanofibers and their synergistic effect is scarcely addressed. This article reports synthesis and characterization of MgO of 70.01 nm and AgNP of 51 to 76 nm by solution combustion and hydrothermal routes respectively and their incorporation in electrospinning of Polyurethane. Flow rate 1 ml/hr, applied voltage 13 kV, tip to collector distance 15 cm were adopted for the electrospinning. Nanofibers of 65 nm were obtained for PU/MgO (3 wt. %) and 106 nm for PU/MgO (3 wt. %)/Ag (1 wt. %). Addition of MgO increased the melting point, after flame time and afterglow time. Incorporation of AgNP improved antibacterial activity. PU/MgO/Ag (2 wt. %) exhibited zone of inhibition of 2.1 cm and 3 cm against E. Coli and S. Aureus, respectively.

Sign in / Sign up

Export Citation Format

Share Document