scholarly journals Effects of Immobilized Ionic Liquid on Properties of Biodegradable Polycaprolactone/LDH Nanocomposites Prepared by In Situ Polymerization and Melt-Blending Techniques

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 969
Author(s):  
Sonia Bujok ◽  
Jiří Hodan ◽  
Hynek Beneš
Keyword(s):  
Ionic Liquid ◽  
Water Vapor ◽  
Ring Opening ◽  
In Situ Polymerization ◽  
High Capacity ◽  
Barrier Properties ◽  
Melt Blending ◽  
Water Vapor Barrier ◽  
Double Hydroxides

The high capacity of calcinated layered double hydroxides (LDH) to immobilize various active molecules together with their inherent gas/vapor impermeability make these nanoparticles highly promising to be applied as nanofillers for biodegradable polyester packaging. Herein, trihexyl(tetradecyl)phosphonium decanoate ionic liquid (IL) was immobilized on the surface of calcinated LDH. Thus, the synthesized nanoparticles were used for the preparation of polycaprolactone (PCL)/LDH nanocomposites. Two different methods of nanocomposite preparation were used and compared: microwave-assisted in situ ring opening polymerization (ROP) of ε-caprolactone (εCL) and melt-blending. The in situ ROP of εCL in the presence of LDH nanoparticles with the immobilized IL led to homogenous nanofiller dispersion in the PCL matrix promoting formation of large PCL crystallites, which resulted in the improved mechanical, thermal and gas/water vapor barrier properties of the final nanocomposite. The surface-bonded IL thus acted as nanofiller surfactant, compatibilizer, as well as thermal stabilizer of the PCL/LDH nanocomposites. Contrary to that, the melt-blending caused a partial degradation of the immobilized IL and led to the production of PCL nanocomposites with a heterogenous nanofiller dispersion having inferior mechanical and gas/water vapor barrier properties.

Poly(vinyl alcohol)/graphene oxide nanocomposites prepared by in situ polymerization with enhanced mechanical properties and water vapor barrier properties

RSC Advances ◽  
2016 ◽  
Vol 6 (55) ◽  
pp. 49448-49458 ◽  
Author(s):  
Jiaojiao Ma ◽  
Ying Li ◽  
Xiande Yin ◽  
Yu Xu ◽  
Jia Yue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
In Situ Polymerization ◽  
Barrier Properties ◽  
Poly Vinyl Alcohol ◽  
Water Vapor Barrier ◽  
One Step ◽  
Polymerization Method

A novel and one-stepin situpolymerization method for preparing the poly(vinyl alcohol) (PVA)/graphene oxide (GO) nanocomposites.

Preparation and properties of poly (vinyl alcohol)/sodium caseinate blend films crosslinked with glutaraldehyde and glyoxal

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Bedriye Ucpinar Durmaz ◽  
Ayse Aytac
Keyword(s):  
Water Vapor ◽  
Vinyl Alcohol ◽  
Sodium Caseinate ◽  
Barrier Properties ◽  
Poly Vinyl Alcohol ◽  
Infrared Analysis ◽  
Crosslinking Reaction ◽  
Water Contact ◽  
Casting Technique ◽  
Water Vapor Barrier

Abstract Bio-based films containing poly (vinyl alcohol)/casein have poor mechanical and water vapor barrier properties that limit their use in packaging application. Some properties such as water resistance and tensile strength can be increased by the cross-linking process. For this reason, poly(vinyl alcohol)/sodium caseinate (PVA/SC) blends were crosslinked by adding glutaraldehyde (GLA) and glyoxal (GL) at different ratios in this work. The films were prepared by solution casting technique. Fourier transform infrared analysis (FTIR) confirmed the crosslinking reaction between the components. As a result of the crosslinking, the thicknesses, water vapor barrier properties and water contact angle values of the films have increased. The total soluble matters (TSM) of PVA/SC film decreased with increasing amounts of crosslinkers and GLA crosslinked films exhibited lower TSM. The addition of GLA and GL resulted in more strengthened films as verified by the tensile test. On the other hand, GLA crosslinked films were more flexible than un-crosslinked and GL crosslinked PVA/SC films. The hydrophilic PVA/SC film became more hydrophobic with the increasing amounts of crosslinkers. With the crosslinking, the PVA/SC film became more thermally stable. In conclusion, the crosslinked PVA/SC films were obtained with suitable properties for packaging applications.

scholarly journals Hybrid films with excellent oxygen and water vapor barrier properties as efficient anticorrosive coatings

RSC Advances ◽  
2018 ◽  
Vol 8 (38) ◽  
pp. 21651-21657 ◽  
Author(s):  
Jiajie Wang ◽  
Ting Pan ◽  
Jian Zhang ◽  
Xiaozhi Xu ◽  
Qing Yin ◽  
...  
Keyword(s):  
Water Vapor ◽  
Layered Double Hydroxide ◽  
Corrosion Behavior ◽  
Spin Coating ◽  
Tween 80 ◽  
Barrier Properties ◽  
Hybrid Films ◽  
Water Vapor Barrier ◽  
Anticorrosive Coatings ◽  
Double Hydroxide

A hydrophobic film is fabricated by spin-coating of Tween 80 modified layered double hydroxide and polydimethylsiloxane alternately, which displays enhanced oxygen/water vapor barrier properties and anti-corrosion behavior toward metal substrates.

Improved performance in micron-sized silicon anodes by in situ polymerization of acrylic acid-based slurry

2016 ◽  
Vol 4 (43) ◽  
pp. 16982-16991 ◽  
Author(s):  
Chao Li ◽  
Tongfei Shi ◽  
Hideya Yoshitake ◽  
Hongyu Wang
Keyword(s):  
In Situ Polymerization ◽  
High Capacity ◽  
Lithium Ion ◽  
Silicon Anodes ◽  
Key Factor ◽  
Polymeric Binders ◽  
Si Anodes ◽  
Improved Performance ◽  
Silicon Particles

The interactions between silicon particles and polymeric binders are a key factor during the course of manufacturing high-capacity Si anodes for lithium-ion batteries.

Tentative Mechanisms for Acrylate Intercalation and in Situ Polymerization in Nickel-Based Layered Double Hydroxides

2004 ◽  
Vol 37 (1) ◽  
pp. 45-51 ◽  
Author(s):  
C. Vaysse ◽  
L. Guerlou-Demourgues ◽  
C. Delmas ◽  
E. Duguet
Keyword(s):  
Layered Double Hydroxides ◽  
In Situ Polymerization ◽  
Double Hydroxides

Preparation and Properties Research of Modified Nano-ZnO/HDPE Composite Films

2010 ◽  
Vol 174 ◽  
pp. 450-453 ◽  
Author(s):  
Ya Na Li ◽  
Kyong Ho Cha ◽  
Qing Hui He
Keyword(s):  
Tensile Strength ◽  
Water Vapor ◽  
Zno Nanoparticles ◽  
Composite Films ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Melt Blending ◽  
Molding Process ◽  
Nano Zno ◽  
Modified Zno Nanoparticles

Nanocomposite films of ZnO/HDPE were prepared via melt blending and hot compression molding process. The morphology, DSC, mechanical and barrier properties of the films were investigated. The results showed that a better dispersion of modified nanoparticles at content of 0.5wt% in HDPE matrix occurred and the improvement of the HDPE films in tensile strength and tear strength was achieved by incorporating modified-ZnO nanoparticles up to 0.5wt% in contrast with the original nano-ZnO/HDPE composite films. It was also found that the addition of modified nano-ZnO to neat HDPE caused to increase crystallinity and enhance the barrier property of nano-ZnO/HDPE composite films against water vapor and oxygen.

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