scholarly journals Improved Oil Resistance of Cellulose Packaging Paper by Coating with Natural Polymer Derived Materials

2021 ◽  
Author(s):  
Feijie Wang ◽  
Liqiang Wang ◽  
Xinchang Zhang ◽  
Shufeng Ma
Keyword(s):  
Food Packaging ◽  
High Surface ◽  
Air Permeability ◽  
Natural Polymer ◽  
Coated Paper ◽  
Oil Resistance ◽  
Polar Components ◽  
High Surface Energy ◽  
Packaging Paper ◽  
Application Scope

Abstract Paper is widely used as food packaging due to its good mechanical strength and degradability. However, it has a relatively strong affinity for water and oil, which limits its application scope. In this work, we prepare two types of coated paper to investigate, the influence the air permeability and polarity on the oil resistance of the coated paper. The results showed that reducing the air permeability improved the grease resistance of the coated paper. High surface energy coatings also showed better oil resistance because of their higher content of polar components that resulted in a higher resistance to grease. The mechanical properties of the paper also improved after applying the coating. These natural derived materials offer an alternative to the fluoride-containing materials currently used in the market to improve the wettability of paper.

The Analysis of Relationships between Surface Porosity and Air Permeability of Paper (board)

2011 ◽  
Vol 396-398 ◽  
pp. 1426-1429 ◽  
Author(s):  
Mei Gui Xue ◽  
Shuang Fei Wang
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Food Packaging ◽  
Large Range ◽  
Air Permeability ◽  
Surface Porosity ◽  
Experimental Values ◽  
Packaging Paper ◽  
Curve Equation ◽  
Scanning Electron

Scanning Electron Microscope (SEM) was used to scan the surfaces of 9 kinds of food packaging paper, and the surface porosity of them was analyzed according to fractaltheory. To study the relationships between surface porosity and the air permeability of the paper samples, Schopper air permeability tester was used to test the air permeability of the samples. By fitting experimental curve, the relationships between the surface porosity and air permeability were obtained. It demonstrated that the fitting curve described the profile of the experimental values very well and the air permeability depends exponentially on surface porosity over a large range of porosity and the fitting curve equation is Ps=1.132e15.89A.

Sustainable coatings on paper for enhancing barrier properties based on hemicellulose

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yanan Li ◽  
Rina Wu ◽  
Jiahui Shi ◽  
Gaosheng Wang
Keyword(s):  
Self Assembly ◽  
Food Packaging ◽  
Polymer Network ◽  
Barrier Properties ◽  
Coated Paper ◽  
Coating Materials ◽  
Water Contact ◽  
Assembly Method ◽  
Thin Polymer ◽  
Packaging Paper

Abstract Coated paper with enhanced barrier properties was prepared via a simple layered self-assembly method using hemicellulose and starch as biobased coatings. Effect of the coating on properties of cellulose paper was investigated. Barrier properties of the paper was increasingly strengthened as the coating amount of hemicellulose rose. When the paper was coated with starch (10.7±0.3  g / m 2 \text{g}/{\text{m}^{2}} ) and hemicellulose (6.9±0.2  g / m 2 \text{g}/{\text{m}^{2}} ) successively, the oil resistance of the paper was increased from 0 to grade 7. Air permeability and water vapor transmittance was decreased by 93.8 % and 39.7 %, respectively. The water contact angle of the coated paper reached 91.7° when the amount of hemicellulose was 1.5±0.2  g / m 2 \text{g}/{\text{m}^{2}} . The hydrophobicity of the coated paper was superior to the original paper although it was negatively influenced by the increasing amount of hemicellulose. The improvement of barrier properties of the coated paper was mainly ascribed to the formation of a thin polymer network on paper surface through intermolecular interaction via hydrogen bonds as demonstrated in SEM and FTIR-ATR results. Moreover, tensile strength and rupture resistance of the coated paper was improved. The results offered an environmentally friendly and economical strategy for preparation of food packaging paper with good barrier properties using biobased coating materials.

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.

scholarly journals Application of Polyvinyl Acetate/Lignin Copolymer as Bio-Based Coating Material and Its Effects on Paper Properties

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 192
Author(s):  
Nana Zhang ◽  
Pansheng Liu ◽  
Yanbin Yi ◽  
Magdi E. Gibril ◽  
Shoujuan Wang ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Air Permeability ◽  
Coated Paper ◽  
Water Contact ◽  
Paper Properties ◽  
Lignin Fraction ◽  
Uncoated Paper ◽  
And Performance ◽  
Packaging Paper ◽  
Acetate Copolymer

In this work, lignin-vinyl acetate copolymers containing different fractions of lignin were synthesized by the copolymerization technique. The synthesized copolymer was successfully applied to coat the paper for enhancing its properties and performance. The effects of the lignin-vinyl acetate copolymer on the physicochemical, air permeability and mechanical properties of paper were investigated. The mechanical strength, hydrophilic, and air permeability properties of coated paper were improved with the increasing content of the lignin. Lignin-vinyl acetate copolymer containing 15% lignin coated paper exhibited a 1.86 times increase in the tensile index, 45 times increase in the water contact angle, and a 41.1% reduction in the air permeability compared with uncoated paper. Scanning electron microscopy was applied to study the morphology of the coated and uncoated paper. The results showed that paper surface porosity structure was decreased, while the surface smoothness was enhanced considerably with increasing lignin fraction in the copolymer. Therefore, the successful fabrication of such an enchanting coated paper may afford new potential and great applications in the packaging paper.

Cracking at the fold in double layer coated paper: the influence of latex and starch composition

TAPPI Journal ◽  
2019 ◽  
Vol 18 (2) ◽  
pp. 93-99
Author(s):  
SEYYED MOHAMMAD HASHEMI NAJAFI ◽  
DOUGLAS BOUSFIELD, ◽  
MEHDI TAJVIDI
Keyword(s):  
Mechanical Properties ◽  
Double Layer ◽  
Starch Content ◽  
Single Layer ◽  
Double Layers ◽  
Coated Paper ◽  
Coated Papers ◽  
Coating Layers ◽  
Scanned Images ◽  
Packaging Paper

Cracking at the fold of publication and packaging paper grades is a serious problem that can lead to rejection of product. Recent work has revealed some basic mechanisms and the influence of various parameters on the extent of crack area, but no studies are reported using coating layers with known mechanical properties, especially for double-coated systems. In this study, coating layers with different and known mechanical properties were used to characterize crack formation during folding. The coating formulations were applied on two different basis weight papers, and the coated papers were folded. The binder systems in these formulations were different combinations of a styrene-butadiene latex and mixtures of latex and starch for two different pigment volume concentrations (PVC). Both types of papers were coated with single and double layers. The folded area was scanned with a high-resolution scanner while the samples were kept at their folded angle. The scanned images were analyzed within a constant area. The crack areas were reported for different types of papers, binder system and PVC values. As PVC, starch content, and paper basis weight increased, the crack area increased. Double layer coated papers with high PVC and high starch content at the top layer had more cracks in comparison with a single layer coated paper, but when the PVC of the top layer was low, cracking area decreased. No measurable cracking was observed when the top layer was formulated with a 100% latex layer.

Bio-mimicking hybrid polymer architectures as adhesion promoters for low and high surface energy substrates

2021 ◽  
Author(s):  
Monisha Baby ◽  
Vijayalakshmi K. Periya ◽  
Bhuvaneshwari Soundiraraju ◽  
Nisha Balachandran ◽  
Suchithra Cheriyan ◽  
...  
Keyword(s):  
Surface Energy ◽  
High Surface ◽  
Hybrid Polymer ◽  
Energy Substrates ◽  
Adhesion Promoters ◽  
Polymer Architectures ◽  
High Surface Energy

scholarly journals Physicochemical Properties and Biological Activity of Active Films Based on Corn Peptide Incorporated Carboxymethyl Chitosan

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 604
Author(s):  
Liyan Wang ◽  
Liang Lei ◽  
Kang Wan ◽  
Yuan Fu ◽  
Hewen Hu
Keyword(s):  
Antioxidant Activity ◽  
Physicochemical Properties ◽  
Food Packaging ◽  
Biological Activities ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Carboxymethyl Chitosan ◽  
Vapor Permeability ◽  
Zone Method ◽  
Oil Resistance

Active films based on carboxymethyl chitosan incorporated corn peptide were developed, and the effect of the concentration of corn peptide on films was evaluated. Physicochemical properties of the films, including thickness, opacity, moisture content, color, mechanical properties, water vapor permeability, and oil resistance, were measured. Biological activities of the films, including the antioxidant and antibacterial activities, were characterized in terms of 2, 2-diphenyl-1-picrylhydrazyl free radical scavenging activity, reducing power, the total antioxidant activity, and the filter disc inhibition zone method. The results indicated that the incorporation of corn peptide caused interactions between carboxymethyl chitosan and corn peptide in Maillard reaction and gave rise to the films light yellow appearance. Compared with the Control, the degree of glycosylation, browning intensity, thickness, opacity, tensile strength, antioxidant activity, and antibacterial activity of films were increased, but the elongation, vapor permeability, and oil resistance of films were decreased. The films based on corn peptide and carboxymethyl chitosan can potentially be applied to food packaging.

scholarly journals Design and Development of Enhanced Antimicrobial Breathable Biodegradable Polymeric Films for Food Packaging Applications

Polymers ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 3527
Author(s):  
Mona M. Abd Al-Ghani ◽  
Rasha A. Azzam ◽  
Tarek M. Madkour
Keyword(s):  
Food Packaging ◽  
Transmission Rate ◽  
Air Permeability ◽  
Optimal Number ◽  
Food Protection ◽  
Oxygen Transmission Rate ◽  
Microporous Films ◽  
Vitro Analysis ◽  
In Vitro Analysis

The principle of breathable food packaging is to provide the optimal number of pores to transfer a sufficient amount of fresh air into the packaging headspace. In this work, antimicrobial microporous eco-friendly polymeric membranes were developed for food packaging. Polylactic acid (PLA) and polycaprolactone (PCL) were chosen as the main packaging polymers for their biodegradability. To develop the microporous films, sodium chloride (NaCl) and polyethylene oxide (PEO) were used as porogenic agents and the membranes were prepared using solvent-casting techniques. The results showed that films with of 50% NaCl and 10% PEO by mass achieved the highest air permeability and oxygen transmission rate (O2TR) with PLA. Meanwhile, blends of 20% PLA and 80% PCL by mass showed the highest air permeability and O2TR at 100% NaCl composition. The microporous membranes were also coated with cinnamaldehyde, a natural antimicrobial ingredient, to avoid the transportation of pathogens through the membranes into the packaged foods. In vitro analysis showed that the biodegradable membranes were not only environmentally friendly but also allowed for maximum food protection through the transportation of sterile fresh air, making them ideal for food packaging applications.

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