Novel composite films from regenerated cellulose-glycerol-polyvinyl alcohol: Mechanical and barrier properties

2019 ◽  
Vol 89 ◽  
pp. 481-491 ◽  
Author(s):  
Patricia Cazón ◽  
Gonzalo Velazquez ◽  
Manuel Vázquez
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films ◽  
Barrier Properties ◽  
Regenerated Cellulose

scholarly journals Preparation, characterization, and oxygen barrier properties of regenerated cellulose/polyvinyl alcohol blend films

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2735-2746
Author(s):  
Qianqian Zhu ◽  
Jingjing Wang ◽  
Jianzhong Sun ◽  
Qianqian Wang
Keyword(s):  
Polyvinyl Alcohol ◽  
Gas Permeability ◽  
Composite Films ◽  
Casting Process ◽  
Barrier Properties ◽  
Tensile Tests ◽  
Urea Solution ◽  
Regenerated Cellulose ◽  
Oxygen Barrier ◽  
Blend Films

The application of cellulose materials for packaging usage has attracted a large amount of attention in recent years. In this study, cellulose was dissolved in a cold NaOH/urea solution. Transparent, strong, and flexible regenerated cellulose/polyvinyl alcohol (PVOH) films were fabricated via a solution blending and casting process. The physicochemical properties of the neat RC films, PVOH films, and RC-PVOH blend films were characterized via scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, tensile tests, gas permeability, and ultraviolet-visible spectroscopy. The results of the physicochemical characterizations indicated that the RC-PVOH composite films with various PVOH contents yielded strong properties in terms of optical transparency, thermal stability, mechanical strength, and oxygen barrier performance. The RC-PVOH films with 8% PVOH loading exhibited a peak degradation temperature of 362 °C, a tensile strength of 80.8 MPa ± 0.3 MPa, and an oxygen permeability of 2.40 cm3 x μm/m2 x 24 h x kPa. The RC-PVOH composite films could be a competitive alternative as a packaging material to replace petroleum-based plastics.

scholarly journals Preparation and Properties of Cyanobacteria-Based Carbon Quantum Dots/Polyvinyl Alcohol/ Nanocellulose Composite

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1143 ◽  
Author(s):  
Li Xu ◽  
Ying Li ◽  
Shiyu Gao ◽  
Yue Niu ◽  
Huaxuan Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Polyvinyl Alcohol ◽  
Water Resistance ◽  
Composite Films ◽  
Barrier Properties ◽  
Carbon Quantum Dots ◽  
Infrared Light ◽  
Quantum Yields ◽  
Hydroxyl Groups ◽  
Light Barrier

Blue luminescent carbon quantum dots (CQDs) were prepared from cyanobacteria by a hydrothermal method. The PL quantum yields of the obtained CQDs was 5.30%. Cyanobacteria-based carbon quantum dots/polyvinyl alcohol/nanocellulose composite films were prepared, which could emit bright blue under UV light. FTIR characterization showed that the composite films had hydroxyl groups on the surface and no new groups were formed after combining the three materials. The photoluminescence (PL) spectra revealed that the emission of the prepared CQDs was excitation dependent. Studies on the water resistance performance and light barrier properties of the composite films showed that they possessed higher water resistance properties and better UV/infrared light barrier properties. Therefore, we report the cyanobacteria-based carbon quantum dots/polyvinyl alcohol/nanocellulose composite films have the potential to be applied in flexible packaging materials, anti-fake materials, UV/infrared light barrier materials and so on.

Effect of polymer blending on mechanical and barrier properties of starch-polyvinyl alcohol based biodegradable composite films

2021 ◽  
Vol 44 ◽  
pp. 101352
Author(s):  
Sharmila Patil ◽  
Ashok Kumar Bharimalla ◽  
Archana Mahapatra ◽  
Jyoti Dhakane-Lad ◽  
A. Arputharaj ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films ◽  
Barrier Properties ◽  
Polymer Blending ◽  
Biodegradable Composite

scholarly journals Modification of polyvinyl alcohol/microfibrillated-cellulose films by ethylene triethoxysilane

2020 ◽  
Vol 15 ◽  
pp. 155892502091087
Author(s):  
Pei-wei Bian ◽  
Bin-qing Sun ◽  
Li-qiang Huang
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films ◽  
Film Surface ◽  
Barrier Properties ◽  
Microfibrillated Cellulose ◽  
Hydrophobic Property ◽  
Water Contact ◽  
Cellulose Films ◽  
Cellulose Composite ◽  
Thermal Stability Of

This study aimed to improve the strength and hydrophobic properties of polyvinyl alcohol/microfibrillated-cellulose composite films and thereby solve problems such as the poor water resistance of polyvinyl alcohol films and defects in the packaging. Polyvinyl alcohol/microfibrillated-cellulose composite films were prepared with the silane coupling agent KH151. The mechanical, optical, crystalline, and other properties of the composite films were tested. After the modification of the polyvinyl alcohol/microfibrillated-cellulose films, their strength and hydrophobic and barrier property were greatly improved. Moreover, their oxygen transmittance decreased by 85.9%, and the water contact angle of the film surface increased by 44%. The internal structure of a polyvinyl alcohol/microfibrillated-cellulose film is formed by KH151, which improves the strength and barrier properties of the film, forms an alkane-based layer on the film surface, and improves the hydrophobic property of the film. Thermogravimetric analysis shows that the thermal stability of composite materials has been greatly improved.

scholarly journals Polyvinyl Alcohol-Few Layer Graphene Composite Films Prepared from Aqueous Colloids. Investigations of Mechanical, Conductive and Gas Barrier Properties

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 858 ◽  
Author(s):  
Benoit Van der Schueren ◽  
Hamza El Marouazi ◽  
Anurag Mohanty ◽  
Patrick Lévêque ◽  
Christophe Sutter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Polyvinyl Alcohol ◽  
Transmission Rate ◽  
Composite Films ◽  
Barrier Properties ◽  
Water Soluble ◽  
Gas Barrier ◽  
Layer Graphene ◽  
Few Layer Graphene

Quasi all water soluble composites use graphene oxide (GO) or reduced graphene oxide (rGO) as graphene based additives despite the long and harsh conditions required for their preparation. Herein, polyvinyl alcohol (PVA) films containing few layer graphene (FLG) are prepared by the co-mixing of aqueous colloids and casting, where the FLG colloid is first obtained via an efficient, rapid, simple, and bio-compatible exfoliation method providing access to relatively large FLG flakes. The enhanced mechanical, electrical conductivity, and O2 barrier properties of the films are investigated and discussed together with the structure of the films. In four different series of the composites, the best Young’s modulus is measured for the films containing around 1% of FLG. The most significant enhancement is obtained for the series with the largest FLG sheets contrary to the elongation at break which is well improved for the series with the lowest FLG sheets. Relatively high one-side electrical conductivity and low percolation threshold are achieved when compared to GO/rGO composites (almost 10−3 S/cm for 3% of FLG and transport at 0.5% FLG), while the conductivity is affected by the formation of a macroscopic branched FLG network. The composites demonstrate a reduction of O2 transmission rate up to 60%.

Mechanical, thermal, and water vapor barrier properties of regenerated cellulose/nano-SiO2 composite films

Cellulose ◽  
2018 ◽  
Vol 25 (12) ◽  
pp. 7153-7165 ◽  
Author(s):  
Jeevan Prasad Reddy ◽  
A. Varada Rajulu ◽  
Jong-Whan Rhim ◽  
Jongchul Seo
Keyword(s):  
Water Vapor ◽  
Composite Films ◽  
Barrier Properties ◽  
Regenerated Cellulose ◽  
Water Vapor Barrier ◽  
Nano Sio2
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