Barrier properties of organic-inorganic hybrid coatings based on polyvinyl alcohol with improved water resistance

2009 ◽  
Vol 50 (1) ◽  
pp. 144-153 ◽  
Author(s):  
Matteo Minelli ◽  
Maria Grazia De Angelis ◽  
Ferruccio Doghieri ◽  
Marco Rocchetti ◽  
Angelo Montenero
Keyword(s):  
Polyvinyl Alcohol ◽  
Water Resistance ◽  
Barrier Properties ◽  
Hybrid Coatings ◽  
Inorganic Hybrid

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.

Advanced Organic-inorganic Hybrid Coatings Having Both High Gas Barrier Properties and Abrasion Resistance

2006 ◽  
Vol 951 ◽  
Author(s):  
Katsunori Nishiura ◽  
Toshihiko Takaki ◽  
Makoto Nakaura
Keyword(s):  
Polymer Films ◽  
Abrasion Resistance ◽  
Sol Gel ◽  
Barrier Properties ◽  
Silica Content ◽  
Hybrid Coatings ◽  
Gas Barrier ◽  
Inorganic Hybrid ◽  
Gas Barrier Properties ◽  
Silica Hybrid

ABSTRACTIt is important to develop flexible transparent polymer films having high gas barrier properties and abrasion resistance because new applications involving transparent polymer films for flat panel displays require these properties. We report on organic-inorganic hybrid coatings of polyvinylalcohol (PVA)/polyacrylicacid (PAA)-silica, which have high gas barrier properties almost equivalent to those achieved by the dry coating process. The hybrid coatings were prepared by the sol-gel reaction of alkoxysilane in a PVA/PAA aqueous solution. In order to obtain transparent coating films, 3-aminopropyltrimethoxysilane (APTMOS) was used as a compatibilizer in the sol-gel reaction of tetramethoxysilane (TMOS). No structure could be seen in the TEM of the cross-sectional coating layer, indicating that polymers and silica were mixed homogeneously. PVA/PAA-silica hybrid coatings were shown to have excellent abrasion resistance based on the ΔHaze index. O2 permeability of PVA/PAA-silica hybrid coatings evaluated by MOCON under the conditions of 23°C, 90% RH was lower than that of PVA/PAA polymer coating, which suggests that silica affects the barrier property of the hybrid coating in humid conditions. Furthermore, O2 permeability decreased as silica content increased in the coatings. Unexpectedly, high gas barrier properties appeared when the silica content exceeded 50 wt%. From the result of element distribution analysis measured by EF-TEM, it was confirmed that phase separation occurred between PVA/PAA and silica on a nanometer scale and silica forms continuous structures, which are considered to suppress O2 permeability.

scholarly journals Improving the Barrier Properties of Packaging Paper by Polyvinyl Alcohol Based Polymer Coating—Effect of the Base Paper and Nanoclay

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1334
Author(s):  
Zhenghui Shen ◽  
Araz Rajabi-Abhari ◽  
Kyudeok Oh ◽  
Guihua Yang ◽  
Hye Jung Youn ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Polymer Coating ◽  
Water Resistance ◽  
Barrier Properties ◽  
Base Paper ◽  
Good Ability ◽  
Barrier Performance ◽  
Cellulosic Paper ◽  
Packaging Paper ◽  
Coating Formulation

The poor barrier properties and hygroscopic nature of cellulosic paper impede the wide application of cellulosic paper as a packaging material. Herein, a polyvinyl alcohol (PVA)-based polymer coating was used to improve the barrier performance of paper through its good ability to form a film. Alkyl ketene dimer (AKD) was used to enhance the water resistance. The effect of the absorptive characteristics of the base paper on the barrier properties was explored, and it was shown that surface-sized base paper provides a better barrier performance than unsized base paper. Nanoclay (Cloisite Na+) was used in the coating formulation to further enhance the barrier performance. The results show that the coating of PVA/AKD/nanoclay dispersion noticeably improved the barrier performance of the paper. The water vapor transmission rate of the base paper was 533 g/m2·day, and it decreased sharply to 1.3 g/m2·day after the application of a double coating because of the complete coverage of the base paper by the PVA-based polymer coating. The coated paper had excellent water resistance owing to its high water contact angle of around 100°. The grease resistance and mechanical properties of the base paper also improved after coating. This work may provide inspiration for improving the barrier properties of packaging paper through the selection of a suitable base paper and coating formulation.

Crosslinking effect on polyvinyl alcohol resin for barrier properties of barrier biaxial orientation films

2022 ◽  
Vol 163 ◽  
pp. 106662
Author(s):  
Amit Suhag ◽  
Kishor Biswas ◽  
Sauraj Singh ◽  
Anurag Kulshreshtha
Keyword(s):  
Polyvinyl Alcohol ◽  
Barrier Properties

Mechanical and Barrier Properties of Polyvinyl Alcohol Films Modified with Carbon Nanotubes and Zinc Oxide

2021 ◽  
Vol 877 ◽  
pp. 27-33
Author(s):  
Ya Li Sun ◽  
Yi Hua Wen ◽  
Qing Cai Liu ◽  
Jui Chin Chen ◽  
Manual Reyes de Guzman ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Polyvinyl Alcohol ◽  
Nanocomposite Film ◽  
Testing Machine ◽  
Barrier Properties ◽  
X Ray Diffraction ◽  
Tensile Testing Machine ◽  
Solution Blending ◽  
Vapor Permeation ◽  
Property Measurement

A solution blending technique was employed to form a nanocomposite film of polyvinyl alcohol modified with carbon nanotube and zinc oxide (CNT/ZnO). The film was characterized using a tensile testing machine, X-ray diffraction, scanning electron microscopy, a contact angle device, and barrier property measurement. When the CNT/ZnO content was 1.2 phr, the results from mechanical property and water vapor permeation tests showed that the nanocomposite film had good tensile strength and water resistance. Moreover, CNT/ZnO improved the hydrophobicity of the film. CNT/ZnO/can improve the performance of PVA and is a good nanofiller of PVA. The results of this research might have the opportunity to be used as packaging film materials in the future.

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