Antimicrobial materials based on poly(ethylene‐ co ‐vinyl alcohol) and silver acetate produced by reactive extrusion

2019 ◽  
Vol 136 (30) ◽  
pp. 47799 ◽  
Author(s):  
Pierrick Paillot ◽  
Wissam Farhat ◽  
Frédéric Becquart ◽  
Ruben Vera ◽  
Corinne Jegat ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Reactive Extrusion ◽  
Silver Acetate ◽  
Antimicrobial Materials ◽  
Poly Ethylene

Poly[ethylene-co-(vinyl alcohol)]-graft-Poly(ε-caprolactone) by Reactive Extrusion, 2 - Parameter Analysis

2009 ◽  
Vol 294 (10) ◽  
pp. 651-657 ◽  
Author(s):  
Yanchao Zhao ◽  
Frédéric Becquart ◽  
Yvan Chalamet ◽  
Jianding D. Chen ◽  
Mohamed Taha
Keyword(s):  
Vinyl Alcohol ◽  
Reactive Extrusion ◽  
Parameter Analysis ◽  
Poly Ethylene

Antimicrobial materials produced by incorporating copper acetate into ethylene-vinyl alcohol copolymer for its use in personal care and cosmetic packaging

2021 ◽  
pp. 088391152110224
Author(s):  
Pierrick Paillot ◽  
Wissam Farhat ◽  
Frédéric Becquart ◽  
Corinne Jegat ◽  
Mohamed Taha
Keyword(s):  
Antimicrobial Agent ◽  
Vinyl Alcohol ◽  
Release Kinetics ◽  
Copper Acetate ◽  
Functional Materials ◽  
Reactive Extrusion ◽  
Green Technology ◽  
Ethylene Vinyl Alcohol ◽  
Ethylene Vinyl Alcohol Copolymer ◽  
Antimicrobial Materials

Currently, there is a great demand for functional materials with effective pathogen-killing properties. In this research, we describe the use of green technology “reactive extrusion” for the synthesis of potent antimicrobial materials based on Ethylene-vinyl alcohol copolymer (EVOH). Herein, the antimicrobial agent, copper (II) acetate was used without pretreatment and introduced into the EVOH matrices at high temperatures. The thermal reaction of copper (II) acetate within the EVOH matrices and their effect on the thermal and thermomechanical properties of the polymer were investigated in regards to their concentration. The physicochemical, thermal, and rheological features, as well as, metal salt release kinetics were reported. The antimicrobial agent had significant effects on the properties of the matrix. Results showed a reduction in the glass transition temperatures and storage modulus of the materials in response to the incorporation of copper (II) acetate. Finally, the antimicrobial activity of the products was studied and demonstrated a possibility to create antimicrobial materials in a one-step, solvent-free extrusion process.

Poly[ethylene-co-(vinyl alcohol)]-graft-poly(ε-caprolactone) Synthesis by Reactive Extrusion, 1 - Structural and Kinetic Study

2009 ◽  
Vol 294 (10) ◽  
pp. 643-650 ◽  
Author(s):  
Frédéric Becquart ◽  
Yvan Chalamet ◽  
Jianding Chen ◽  
Yanchao Zhao ◽  
Mohamed Taha
Keyword(s):  
Kinetic Study ◽  
Vinyl Alcohol ◽  
Reactive Extrusion ◽  
Poly Ethylene

scholarly journals Thermal Properties, Isothermal Decomposition by Direct Analysis in Real-Time-Of-Flight Mass Spectrometry and Non Isothermal Crystallization Kinetics of Poly(Ethylene-Co-Vinyl Alcohol)/Poly(ε-Caprolactone) Blend

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 292
Author(s):  
Abdulaziz Ali Alghamdi ◽  
Hussain Alattas ◽  
Waseem Sharaf Saeed ◽  
Abdel-Basit Al-Odayni ◽  
Ahmed Yacine Badjah Hadj Ahmed ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Real Time ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Vinyl Alcohol ◽  
Time Of Flight ◽  
Direct Analysis ◽  
Isothermal Crystallization Kinetics ◽  
Flight Mass Spectrometry ◽  
Poly Ethylene

A series of poly(ethylene-co-vinyl alcohol)/poly(ε-caprolactone) blends with different compositions were prepared using solvent casting. The miscibility of this pair of polymers was investigated using differential scanning calorimetry (DSC), and proved by a negative Flory interaction parameter value calculated from the Nishi–Wang equation. The miscibility of this blend was also confirmed by scanning electronic microscopy (SEM). The thermal behaviors of the obtained materials were investigated by DSC, thermogravimetric analysis, and direct analysis in real-time–time-of-flight mass spectrometry and the results obtained were very relevant. Furthermore, the crystalline properties of the obtained materials were studied by DSC and X-ray diffraction where the Ozawa approach was adopted to investigate the non-isothermal crystallization kinetics. The results obtained revealed that this approach described the crystallization process well.

Effect of Cobalt Stearate and Vegetable Oil on Uv and Biodegradation of Linear Low-Density Poly(Ethylene)-Poly(Vinyl Alcohol) Blends

2011 ◽  
Vol 2 (4) ◽  
pp. 131-148 ◽  
Author(s):  
Francis Vidya ◽  
Subin S. Raghul ◽  
Sarita G Bhat ◽  
Eby Thomas Thachil
Keyword(s):  
Vegetable Oil ◽  
Vinyl Alcohol ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Low Density ◽  
Compression Moulding ◽  
Melt Mixing ◽  
Degradation Behaviour ◽  
Moulding Process ◽  
Poly Ethylene

The main objective of this study was to enhance the rate of UV and biodegradation of polyethylene by incorporating biodegradable materials and prooxidants. Prooxidants such as transition metal complexes are capable of initiating photooxidation and polymer chain cleavage, rendering the product more susceptible to biodegradation. In this work, the effect of (1) a metallic photoinitiator, cobalt stearate, and (2) different combinations of cobalt stearate and vegetable oil on the photooxidative degradation of linear low-density poly(ethylene)-poly(vinyl alcohol) (LLDPE/PVA) blend films has been investigated. For this, film-grade LLDPE was blended with different proportions of PVA. PVA is widely used in the industrial field, and recently it has attracted increasing attention as a water-soluble biodegradable polymer. Cobalt stearate and vegetable oil were added to the blends as prooxidants. The blends were prepared by melt mixing in a Thermo HAAKE Polylab system. Thin films containing these additives were prepared by a subsequent compression moulding process. The effect of UV exposure on LLDPE/PVA films in the presence as well as absence of these additives was investigated. Tensile properties, FTIR spectra, and scanning electron microscopy (SEM) were employed to investigate the degradation behaviour. It was found

Miscible blends of poly(ethylene oxide) with brush copolymers of poly(vinyl alcohol)-graft -poly(l -lactide)

2016 ◽  
Vol 54 (13) ◽  
pp. 1217-1226 ◽  
Author(s):  
Ainhoa Lejardi ◽  
Jose-Ramon Sarasua ◽  
Agustin Etxeberria ◽  
Emilio Meaurio
Keyword(s):  
Ethylene Oxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Miscible Blends ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Molecularly imprinted poly(ethylene-co-vinyl alcohol) membranes for the specific recognition of phospholipids

2008 ◽  
Vol 24 (4) ◽  
pp. 748-755 ◽  
Author(s):  
C. Pegoraro ◽  
D. Silvestri ◽  
G. Ciardelli ◽  
C. Cristallini ◽  
N. Barbani
Keyword(s):  
Vinyl Alcohol ◽  
Molecularly Imprinted ◽  
Specific Recognition ◽  
Poly Ethylene
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