Effect of multiscale structure on the gas barrier properties of poly(lactic acid)/Ag nanocomposite films

2019 ◽  
Vol 30 (7) ◽  
pp. 1709-1715 ◽  
Author(s):  
Chunli Fan ◽  
Hai Chi ◽  
Cheng Zhang ◽  
Rui Cui ◽  
Wangwei Lu ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Poly Lactic Acid ◽  
Gas Barrier ◽  
Multiscale Structure ◽  
Gas Barrier Properties

Biodegradable Poly(Lactic Acid)/Perkalite Clay Nanocomposites: Gas Barrier Properties

2016 ◽  
Vol 718 ◽  
pp. 10-14 ◽  
Author(s):  
Chuenkhwan Tipachan ◽  
Somjai Kajorncheappunngam
Keyword(s):  
Lactic Acid ◽  
Nanocomposite Film ◽  
Transmission Rate ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Poly Lactic Acid ◽  
Sem Images ◽  
Gas Barrier ◽  
Oxygen Transmission Rate ◽  
Gas Barrier Properties

Nanocomposite films based on poly (lactic) acid (PLA) and organically nanoclay Perkalite were prepared by solvent casting method. The incorporation of Perkalite clay in PLA film was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. Morphology of PLA/Perkalite film was investigated using scanning electron microscope (SEM). The gas barrier properties of PLA nanocomposite films were determined through oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) measurement. Results from FTIR analysis indicates that Perkalite clay was incorporated in PLA film. SEM images show that dispersion of Perkalite particle on the PLA matrix was good with the additional of clay up to 3 pph (parts of clay per hundred part of PLA). The maximum reduction in OTR and WVTR of that nanocomposite film with Perkalite loading of 3 pph are 76% and 37%, respectively compared with neat PLA film. This proves that gas barrier property of PLA film is improved significantly with incorporation of Perkalite clay. The PLA/Perkalite nanocomposite film is a promising as green based packaging materials.

New transparent poly(l-lactide acid) films as high-performance bio-based nanocomposites

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23949-23955 ◽  
Author(s):  
Chih-Chia Cheng ◽  
Hao-Wen Liao ◽  
Jem-Kun Chen ◽  
Duu-Jong Lee ◽  
Zhong Xin
Keyword(s):  
Lactic Acid ◽  
High Performance ◽  
Mechanical Performance ◽  
Barrier Properties ◽  
Poly Lactic Acid ◽  
Gas Barrier ◽  
Transparent Films ◽  
Gas Barrier Properties

A new tri-POSS-end-capped poly(lactic acid) bio-nanocomposite forms transparent films with significantly enhanced gas barrier properties and improved mechanical performance.

scholarly journals Release of Graphene and Carbon Nanotubes from Biodegradable Poly(Lactic Acid) Films during Degradation and Combustion: Risk Associated with the End-of-Life of Nanocomposite Food Packaging Materials

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2346 ◽  
Author(s):  
Stanislav Kotsilkov ◽  
Evgeni Ivanov ◽  
Nikolay Vitanov
Keyword(s):  
Risk Assessment ◽  
Carbon Nanotubes ◽  
Lactic Acid ◽  
Food Packaging ◽  
Safety Concern ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Poly Lactic Acid ◽  
Qualitative Risk Assessment ◽  
The Matrix

Nanoparticles of graphene and carbon nanotubes are attractive materials for the improvement of mechanical and barrier properties and for the functionality of biodegradable polymers for packaging applications. However, the increase of the manufacture and consumption increases the probability of exposure of humans and the environment to such nanomaterials; this brings up questions about the risks of nanomaterials, since they can be toxic. For a risk assessment, it is crucial to know whether airborne nanoparticles of graphene and carbon nanotubes can be released from nanocomposites into the environment at their end-life, or whether they remain embedded in the matrix. In this work, the release of graphene and carbon nanotubes from the poly(lactic) acid nanocomposite films were studied for the scenarios of: (i) biodegradation of the matrix polymer at the disposal of wastes; and (ii) combustion and fire of nanocomposite wastes. Thermogravimetric analysis in air atmosphere, transmission electron microscopy (TEM), atomic force microscopy (AFM) and scanning electron microscope (SEM) were used to verify the release of nanoparticles from nanocomposite films. The three factors model was applied for the quantitative and qualitative risk assessment of the release of graphene and carbon nanotubes from nanocomposite wastes for these scenarios. Safety concern is discussed in respect to the existing regulations for nanowaste stream.

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