scholarly journals Aspect Ratio Control of Layered Double Hydroxide Nanosheets and Their Application for High Oxygen Barrier Coating in Flexible Food Packaging

2020 ◽  
Vol 12 (9) ◽  
pp. 10973-10982 ◽  
Author(s):  
Jingfang Yu ◽  
Jean-Charles Buffet ◽  
Dermot O’Hare
Keyword(s):  
Aspect Ratio ◽  
Layered Double Hydroxide ◽  
Food Packaging ◽  
High Oxygen ◽  
Oxygen Barrier ◽  
Barrier Coating ◽  
Double Hydroxide

scholarly journals Sustainable, self-cleaning, transparent, and moisture/oxygen-barrier coating film for food packaging

2021 ◽  
Author(s):  
Vu Thi Tuyet Thuy ◽  
Lam Tan Hao ◽  
Hyeonyeol Jeon ◽  
Jun Mo Koo ◽  
Jaeduk Park ◽  
...  
Keyword(s):  
Barrier Function ◽  
Food Packaging ◽  
Oxygen Barrier ◽  
Coating Film ◽  
Gas Barrier ◽  
Plastic Packaging ◽  
Chemical Damage ◽  
Barrier Coating ◽  
Self Cleaning

Plastic packaging effectively protects food from mechanical, microbial, and chemical damage; however, oxygen and moisture permeate these plastics and spoil the food. Thus, the gas barrier function is usually imparted...

Superior flame retardant by combining high aspect ratio layered double hydroxide and graphene oxide

Polymer ◽  
2016 ◽  
Vol 91 ◽  
pp. 41-49 ◽  
Author(s):  
Andreas Edenharter ◽  
Patrick Feicht ◽  
Bashar Diar-Bakerly ◽  
Günter Beyer ◽  
Josef Breu
Keyword(s):  
Graphene Oxide ◽  
Aspect Ratio ◽  
Flame Retardant ◽  
Layered Double Hydroxide ◽  
High Aspect Ratio ◽  
Double Hydroxide

Enhanced properties of poly(lactic acid) by concurrent addition of organo-modified Mg-Al layered double hydroxide (LDH) and triethyl citrate

2019 ◽  
pp. 089270571986827 ◽  
Author(s):  
Mehrnoush Monshizadeh ◽  
Sajad Seifi ◽  
Iman Hejazi ◽  
Javad Seyfi ◽  
Hossein Ali Khonakdar
Keyword(s):  
Lactic Acid ◽  
Layered Double Hydroxide ◽  
Food Packaging ◽  
Synergistic Effects ◽  
Poly Lactic Acid ◽  
Solution Casting ◽  
Scanning Calorimetry ◽  
Concurrent Use ◽  
Triethyl Citrate ◽  
Double Hydroxide

Synergistic effects of organo-modified Mg-Al layered double hydroxide (LDH) and triethyl citrate (TEC) on the properties of poly(lactic acid) (PLA) were demonstrated. PLA/LDH nanocomposites in the absence and presence of TEC were fabricated via solution casting technique. Morphological analysis revealed that as the LDH concentration increases, the number of aggregations is also increased; however, introduction of TEC considerably enhanced the dispersion quality of LDHs. Differential scanning calorimetry results showed that the addition of LDH and TEC had no significant influence on the crystallinity of nanocomposites obtained from solution casting. In contrast, once the samples were cooled from melt, the concurrent use of LDH and TEC led to a dramatic enhancement in the crystallinity of PLA ( X c = 55.5%). Moreover, the LDH nanoparticles counterbalanced the adverse effects of plasticization by TEC leading to enhanced toughness of the final nanocomposites. LDH had also a positive influence on thermal stability of PLA, indicating the heat-insulating role of LDH particles. In conclusion, the concurrent use of LDH and TEC could extend the applicability of PLA especially in food packaging applications.

High Oxygen Barrier Polyethylene Films

2017 ◽  
Vol 25 (8) ◽  
pp. 571-582 ◽  
Author(s):  
Carmen Fernández Ayuso ◽  
Alejandro Arribas Agüero ◽  
Jose A. Plaza Hernández ◽  
Antonio Bódalo Santoyo ◽  
Elisa Gómez Gómez
Keyword(s):  
Food Packaging ◽  
High Oxygen ◽  
Oxygen Barrier ◽  
Layer By Layer ◽  
Insulating Layer ◽  
Polyethylene Films ◽  
Barrier Films ◽  
Film Substrate ◽  
Corona Treatment ◽  
Thermal Stability Of

“Layer by layer” technology was used to create transparent, thin and high barrier polyethylene films to use in food packaging. These films were made by inserting successive layers of polyacrylamide and montmorillonite (Cloisite Na+, non-organic modification) grown onto a low density polyethylene (LDPE) film substrate submitted to corona treatment. Excellent oxygen permeability results were reached with only 9 bilayers, with a reduction of 99.92%, compared to the pure polyethylene. This allowed the oxygen barrier film to change from poor to high (3.66 cm3/m2·day), with a total thickness of 48 microns, due to the structure formed over the film to create a tortuous path for oxygen molecules. Optical properties were analysed, showing a ≥92% transparency in all samples. Thermal stability of polyethylene was slightly improved and this was attributed to nanoclays presence forming an insulating layer. The result of this research is a thin structured film which is a good candidate for common barrier films replacement in food packaging thanks to its high oxygen barrier capacity, optical transparency, microwaveability and recyclability.

scholarly journals Ultra-high aspect ratio hybrid materials: the role of organic guest and synthesis method

2018 ◽  
Vol 47 (9) ◽  
pp. 2933-2938 ◽  
Author(s):  
G. V. Manohara ◽  
Li Li ◽  
Andrew Whiting ◽  
H. Chris Greenwell
Keyword(s):  
Aspect Ratio ◽  
Layered Double Hydroxide ◽  
Hybrid Materials ◽  
High Aspect Ratio ◽  
Synthesis Method ◽  
Metal Hydroxides ◽  
Double Hydroxide ◽  
Hydrolysis Of

Hybrid layered double hydroxide materials with high aspect ratio have been prepared by slow hydrolysis of metal hydroxides with hydrophobic anions.

scholarly journals Enzymatic Hydrolysis of Bacterial Cellulose for the Production of Nanocrystals for the Food Packaging Industry

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 735
Author(s):  
Cesare Rovera ◽  
Filippo Fiori ◽  
Silvia Trabattoni ◽  
Diego Romano ◽  
Stefano Farris
Keyword(s):  
Enzymatic Hydrolysis ◽  
Bacterial Cellulose ◽  
Food Packaging ◽  
Hydrolytic Activity ◽  
High Oxygen ◽  
Oxygen Barrier ◽  
Final State ◽  
Barrier Coatings ◽  
Significant Difference ◽  
Packaging Industry

Bacterial cellulose nanocrystals (BCNCs) obtained by enzymatic hydrolysis have been loaded in pullulan biopolymer for use as nanoparticles in the generation of high-oxygen barrier coatings intended for food packaging applications. Bacterial cellulose (BC) produced by Komagataeibacter sucrofermentans was hydrolyzed by two different enzymatic treatments, i.e., using endo-1,4-β-glucanases (EGs) from Thermobifida halotolerans and cellulase from Trichoderma reesei. The hydrolytic activity was compared by means of turbidity experiments over a period of 145 h, whereas BCNCs in their final state were compared, in terms of size and morphology, by atomic force microscopy (AFM) and dynamic light scattering (DLS). Though both treatments led to particles of similar size, a greater amount of nano-sized particles (≈250 nm) were observed in the system that also included cellulase enzymes. Unexpectedly, transmission electron microscopy (TEM) revealed that cellulose nanoparticles were round-shaped and made of 4–5 short (150–180 nm) piled whiskers. Pullulan/BCNCs nanocomposite coatings allowed an increase in the overall oxygen barrier performance, of more than two and one orders of magnitude (≈0.7 mL·m−2·24 h−1), of pure polyethylene terephthalate (PET) (≈120 mL·m−2·24 h−1) as well as pullulan/coated PET (≈6 mL·m−2·24 h−1), with no significant difference between treatments (hydrolysis mediated by EGs or with the addition of cellulase). BCNCs obtained by enzymatic hydrolysis have the potential to generate high oxygen barrier coatings for the food packaging industry.

scholarly journals Non-toxic layered double hydroxide nanoplatelet dispersions for gas barrier coatings on flexible packaging

2021 ◽  
Author(s):  
Kanittika Ruengkajorn ◽  
Chunping Chen ◽  
Jingfang Yu ◽  
Jean-Charles Buffet ◽  
Dermot O'Hare
Keyword(s):  
Green Synthesis ◽  
Layered Double Hydroxide ◽  
Food Packaging ◽  
Gas Barrier ◽  
Barrier Coatings ◽  
Flexible Packaging ◽  
Double Hydroxide

High gas barrier, transparent and non-toxic coatings are increasingly demanded due to the need to develop easier recyclable food packaging technologies. Here, we reported a green synthesis of layered double...

Remarkable oxygen barrier films based on a layered double hydroxide/chitosan hierarchical structure

2015 ◽  
Vol 3 (23) ◽  
pp. 12350-12356 ◽  
Author(s):  
Ting Pan ◽  
Simin Xu ◽  
Yibo Dou ◽  
Xiaoxi Liu ◽  
Zhongze Li ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
High Stability ◽  
Barrier Properties ◽  
Oxygen Barrier ◽  
Hybrid Films ◽  
Inorganic Hybrid ◽  
Barrier Films ◽  
Double Hydroxide ◽  
Term Maintenance

Organic–inorganic hybrid films are fabricated via an alternate assembly of a chitosan (CTS) polymer and hierarchical layered double hydroxide (H-LDH), which exhibit tremendous oxygen barrier properties with high stability as well as long-term maintenance.

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