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.

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.

Preparation of the Microfibrillated Cellulose and its Application in the Food Packaging Paper

2013 ◽  
Vol 469 ◽  
pp. 87-90
Author(s):  
Li Liu ◽  
Yun Zhi Chen ◽  
Zheng Jian Zhang
Keyword(s):  
Food Packaging ◽  
Barrier Properties ◽  
Air Permeability ◽  
Microfibrillated Cellulose ◽  
High Pressure Homogenization ◽  
High Quality ◽  
Base Paper ◽  
Hardwood Pulp ◽  
Packaging Paper ◽  
Oxidation System

Microfibrillated cellulose (MFC) was prepared from the bleached kraft hardwood pulp using TEMPO/NaClO/NaBr oxidation system and high pressure homogenization. By changing dosages of the TEMPO, NaClO and NaBr, the pressure and times of homogenization, pretreatment and homogenization process were optimized. Experimental investigation indicated that for making MFC of high quality, 0.25%TEMPO, 2.5%NaBr, 60%NaClO (based on oven dry pulp), 20 times of homogenization, pressure of 60MPa in the process of treatment were required. At last, the mechanical and barrier properties were tested after the base paper was coated by homemade MFC. The study suggested that mechanical properties (especially 5 times increase of the folding strength) increased substantially and air permeability decreased by 100times.

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

Facile fabrication of hydrophobic cellulosic paper with good barrier properties via PVA/AKD dispersion coating

2019 ◽  
Vol 34 (4) ◽  
pp. 516-524
Author(s):  
Zhenghui Shen ◽  
Soojin Kwon ◽  
Kyudeok Oh ◽  
Araz Rajabi Abhari ◽  
Hak Lae Lee
Keyword(s):  
Transmission Rate ◽  
Substrate Surface ◽  
Barrier Properties ◽  
Porous Polymer ◽  
Alkyl Ketene Dimer ◽  
Resistance Level ◽  
Water Contact ◽  
Cellulosic Fibers ◽  
Base Paper ◽  
Cellulosic Paper

Abstract Due to the micro-sized pores on cellulosic substrate surface and the hygroscopic nature of cellulosic fibers, paper has poor barrier properties. Dispersion coating can improve the barrier properties of cellulosic paper noticeably by forming a continuous, non-porous polymer film on paper surface. In this work, the excellent film-forming performance of polyvinyl alcohol (PVA) was used to seal the surface pores of paper, thus enhancing the barrier properties. Alkyl ketene dimer (AKD) was also added as a coating component to improve the water resistance of paper. Results showed that after PVA/AKD coating hydrophilic base paper changed to hydrophobic one, as proved by water contact angle (WCA) measurements. The water vapor transmission rate (WVTR) of base paper decreased sharply from 543 g/m2·day to 2 g/m2·day in the case of PVA/AKD triple coating, where the threshold of WVTR was reached. Meanwhile, the pristinely non-grease resistant base paper converted to a product with the highest grease resistance level. Furthermore, both elongation at break and tensile strength of base paper improved markedly after PVA/AKD coating. It was concluded that these improved properties were contributed by the combined use of PVA and AKD in the coating.

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.

Influences of Emulsion on Water Resistance of Vitrified Micro Bubbles Thermal Insulation Material

2013 ◽  
Vol 662 ◽  
pp. 433-436
Author(s):  
Jiang Zhu ◽  
Guo Zhong Li
Keyword(s):  
Compressive Strength ◽  
Polyvinyl Alcohol ◽  
Stearic Acid ◽  
Thermal Insulation ◽  
Water Resistance ◽  
Insulation Material ◽  
Molding Process ◽  
Thermal Insulation Material ◽  
Improve Water Resistance ◽  
Softening Coefficient

Vitrified micro bubbles thermal insulation material was made of vitrified micro bubbles, cement, fly ash, gypsum and sodium silicate, by molding process. VAE emulsion and stearic acid-polyvinyl alcohol emulsion were added to improve water resistance of the material. Mixed with 10% VAE emulsion and 5% stearic acid-polyvinyl alcohol emulsion, properties of the material are followed as: flexural strength 0.64MPa, compressive strength 1.35MPa, softening coefficient 0.71 and 2h volumetric water absorption 6.9%.

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