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...

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.

Hydroxide-ion-conductive gas barrier films based on layered double hydroxide/polysulfone multilayers

2018 ◽  
Vol 54 (56) ◽  
pp. 7778-7781 ◽  
Author(s):  
Xiaozhi Xu ◽  
Lumei Wang ◽  
Jiajie Wang ◽  
Qing Yin ◽  
Siyuan Dong ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Quaternary Ammonium ◽  
Ion Conductivity ◽  
Layer By Layer ◽  
Hybrid Films ◽  
Gas Barrier ◽  
Hydroxide Ion ◽  
Barrier Films ◽  
Double Hydroxide ◽  
Layer Assembly

Hybrid films were fabricated via the layer-by-layer assembly of layered double hydroxide (LDH) nanoplates and quaternary ammonium grafted polysulfone (QAPSF), and showed dual functionality with both gas barrier and hydroxide ion conductivity properties.

scholarly journals Aged layered double hydroxide nanosheet–polyvinyl alcohol dispersions for enhanced gas barrier coating performance

2021 ◽  
Author(s):  
Jingfang Yu ◽  
Chunping Chen ◽  
James B. Gilchrist ◽  
Jean-Charles Buffet ◽  
Zhonghua Wu ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Layered Double Hydroxide ◽  
Transmission Rate ◽  
Gas Barrier ◽  
Coating Performance ◽  
Oxygen Transmission Rate ◽  
Barrier Coating ◽  
Coated Film ◽  
Double Hydroxide ◽  
Oxygen Transmission

The oxygen transmission rate of a PET coated film showed a 37-fold decrease using a dispersion of LDH nanosheets in polyvinyl alcohol that was prior aged for 8 weeks compared to the film coated with the equivalent freshly prepared LDH/PVA dispersion.

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