Designed cellulose nanocrystal surface properties for improving barrier properties in polylactide nanocomposites

Espino-Pérez, Etzael; Bras, Julien; Almeida, Giana; Plessis, Cédric; Belgacem, Naceur; Perré, Patrick; Domenek, Sandra

doi:10.1016/j.carbpol.2017.12.005

Cited by 48 publications

(40 citation statements)

References 60 publications

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“…Fortunati et al, highlighted the improvements in barrier properties of PLA/CNC nanocomposites as well as increased crystallinity simultaneously, which was attributed to the addition of CNCs [170]. Espino-Pérez and co-workers investigated CNC/PLA nanocomposites using a high D-lactic acid content (a material which under normal processing conditions cannot crystallize) as matrix [171]. In conclusion, they indicated that the tortuosity effect of CNC on the oxygen barrier properties is limited.…”

Section: Possible Applications Of Nfpcs With Improved Fiber-matrix Admentioning

confidence: 99%

Fiber-Matrix Relationship for Composites Preparation

Shesan¹,

Stephen²,

Chioma³

et al. 2019

Renewable and Sustainable Composites

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Fiber-matrix interaction at the interphase is one very important property that is of great concern to all polymer scientists involved in polymer composites. Many of the failures can be traced to the type of interfacial interaction existing in the composites. That is why highlighting the factors that dictate the type of and the extent of interactions at the interphases become very necessary. Natural fiber polymer composites have found application in many fields of human endeavors. To continue this growth being experienced, the factors that determine the formation of good interaction at the interphase most be understood, so that they can be manipulated for a better result.

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Section: Possible Applications Of Nfpcs With Improved Fiber-matrix Admentioning

confidence: 99%

Fiber-Matrix Relationship for Composites Preparation

Shesan¹,

Stephen²,

Chioma³

et al. 2019

Renewable and Sustainable Composites

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“…The gravimetric method was used for the measurement of the anisole sorption kinetics (see Table S1 for the physicochemical properties of anisole) [20]. The sorption curves were recorded at 40°C and 0% RH, using an electronic microbalance operating at a fixed partial pressure (Intelligent Gravimetric Analyser 002, Hiden Isochema Ltd, Warrington, UK, (precision 0.2 μg).…”

Section: Anisole Sorption Experimentsmentioning

confidence: 99%

Impact of ZnO nanoparticle morphology on relaxation and transport properties of PLA nanocomposites

et al. 2019

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In this work we study the effect of zinc oxide (ZnO) nanoparticle morphology and concentration on the resulting relaxation and transport properties of polylactide (PLA) nanocomposites. Films containing spherical and rodshaped ZnO nanoparticles were incorporated into an amorphous polylactide (PLA) matrix through a solventprecipitation and compression moulding method. Morphological analyses carried out by scanning electron microscopy (SEM) together with ultraviolet-visible (UV-Vis) spectroscopy and thermogravimetric analysis (TGA). Results indicate a much better distribution of rod-shaped ZnO within PLA matrix. Relaxation experiments reveal faster physical aging kinetics of PLA in presence ZnO nanoparticles notwithstanding their shape, suggesting the presence of non-interacting surfaces between the amorphous PLA matrix and the ZnO nanoparticles. Interestingly, both helium and oxygen permeability remained stable or increase upon nanoparticle addition, and anisole sorption kinetics showed faster mass transport in the nanocomposites, suggesting that the low interfacial adhesion between PLA and ZnO brings supplementary voids to the material increasing mass transport. Overall, the experimental findings here reported provide a deeper understanding on the influence of metal oxide nanoparticle morphology on the resulting relaxation and gas transport properties of amorphous polymeric nanocomposites.

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“…Concerning biofilms, neat PLA (Polylactide) films were prepared using the casting method described in [9]. Biofilms were 60 -80 μm thick, with a standard deviation of 20 %.…”

Section: Methodsmentioning

confidence: 99%

“…Preliminary tests confirmed that the duration of each RH plateau was suficient to attain the equilibrium condition (the rate of change of mass per unit time (dm/dt) was less than 0.0005%/min). The data were saved every 20 s. More details about the methodology are available in [9].…”

Section: Sorption Tests Applied On Biofilmsmentioning

confidence: 99%

Non-Fickian diffusion in biomaterials

Almeida

Perré

2018

Proceedings of 21th International Drying Symposium

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The knowledge of water vapour diffusion in materials is very important in several fields of application (drying, building materials, biofilms…). Regarding the drying process, the value of mass diffusivity, as well as its variations with moisture content, governs the second drying period, which is the most important in terms of drying time, energy consumption and product quality. In the case of biomaterials used for building insulation, this parameter is essential for transformation processes, including drying, but also for the proper design and use of buildings. Concerning biofilms, barrier properties are one of the most important physical properties of these materials to properly ensure a good end use. Nevertheless, experimental data of mass uptake of some biomaterials showed that did not follow the standard Fickian model. The precise determination of this non-Fickian behaviour showed to be a difficult task since the physical phenomena responsible for such behaviours depend on the biomaterial structure and physical properties. In particular, the abnormal macroscopic behaviour could result from the pore morphology (dual-scale effects), from the nano-structure, from the molecular reorganisation, or a combination of these spatial scales. This conference proposes a new methodology to quantify the non-Fickian diffusion. Based on a macroscopic formulation of coupled heat and mass transfer with kernel functions, the model parameters, intrinsic characteristic of the product of interest are determined by inverse analysis. Several complementary transient experiments can be analysed simultaneously, which insures the method robustness. Application examples are proposed for different products, including lignocellulosic materials and nanostructured biofilms.

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Designed cellulose nanocrystal surface properties for improving barrier properties in polylactide nanocomposites

Cited by 48 publications

References 60 publications

Fiber-Matrix Relationship for Composites Preparation

Fiber-Matrix Relationship for Composites Preparation

Impact of ZnO nanoparticle morphology on relaxation and transport properties of PLA nanocomposites

Non-Fickian diffusion in biomaterials

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