Effect of microcrystalline and nanocrystals cellulose fillers in materials based on PLA matrix

Santos, Fernanda A. dos; Iulianelli, Gisele Cristina Valle; Tavares, Maria Inês B.

doi:10.1016/j.polymertesting.2017.05.028

Cited by 75 publications

(49 citation statements)

References 15 publications

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“…However, the main drawback of PLA/hydrophilic filler biocomposites is the problem of poor filler distribution, leading to agglomeration deriving from poor PLA-filler interaction. Note that the problem of agglomeration is caused by strong cohesive adhesion among filler particles [9,10]. A resulting problem of filler agglomeration could be solved by surface modification approach to alter the filler-filler interaction [11].…”

Section: Introductionmentioning

confidence: 99%

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO₂ Composites

Lertphirun

Srikulkit

2019

International Journal of Polymer Science

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Hydrophobic cellulose/SiO2 composites were prepared. Resultant hydrophobic cellulose/SiO2 composites were melt mixed with PLA using a twin-screw extruder to obtain 10 wt% masterbatch. Again, 10 wt% masterbatch was melt mixed with virgin PLA, resulting in PLA containing hydrophobic cellulose/SiO2 at various contents (1 wt%, 3 wt%, and 5 wt%) using a twin-screw extruder (barrel zone temperature: 150/160/170/180/190°C (die zone)). Injection-molded samples were prepared for mechanical properties evaluation. Results showed that poor mechanical properties found at low percent loadings were associated with a significant depolymerization of masterbatch composition due to twice thermal treatments. Note that 10 wt% masterbatch was subjected to injection molding straight away in a one-step process. Results showed that 10 wt% hydrophobic cellulose/SiO2/PLA composites exhibited mechanical properties equivalent to neat PLA. Importantly, the addition of hydrophobic cellulose/SiO2 at high percent loading could favor landfill degradation of PLA via water absorption ability of cellulose. It was expected that enzymatic hydrolysis of cellulose resulted in the formation of lactic acid and silicic acid which consequently catalyzed the hydrolytic degradation (acid hydrolysis) of PLA. The hydrolytic degradation produced carboxylic acid end group which further accelerated the degradation rate.

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Section: Introductionmentioning

confidence: 99%

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO₂ Composites

Lertphirun

Srikulkit

2019

International Journal of Polymer Science

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“…Different inorganic nanoparticulate fillers were added to PLA matrix to enhance some of its properties and to extend its applications, for instance silicates , such as montmorillonite . Solid bio‐based organic fillers such as wood flour, starch particles or cellulose nanocrystals and nanofibrils were also incorporated in PLA by polymer melt blending or solvent casting. In this regard, chitosan microparticles and nanoparticles have also been considered for controlling PLA physical properties .…”

Section: Introductionmentioning

confidence: 99%

Biocomposite films based on poly(lactic acid) and chitosan nanoparticles: Elaboration, microstructural and thermal characterization

Hijazi

Moigne

Rodier

et al. 2018

Polymer Engineering & Sci

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Structured and fully bio‐based polymer assemblies based on chitosan micro‐ and nano‐particles and poly(lactic acid) (PLA) were developed using a continuous cast‐film extrusion process. The microstructure and thermal properties of the resulting biocomposite films are studied. Dispersion and size distribution of chitosan particles within the films were analyzed by optical microscopy and laser diffraction. Results show a homogeneous dispersion with no particles agglomeration, due to favorable physico–chemical interactions between chitosan particles and PLA and weak particle cohesion within the agglomerates. Differential scanning calorimetry experiments evidence a pronounced nucleating effect as well as an enhanced crystal growth rate, and a great increase in crystallinity of PLA in the presence of chitosan particles. Furthermore, in the case of chitosan nanoparticles, no reduction of PLA molecular weight occurred as revealed by gel permeation chromatography. The dispersion of nanosized chitosan particles in PLA thus appears to be an efficient way to control its crystallization behavior without degrading its molecular characteristics. POLYM. ENG. SCI., 59:E350–E360, 2019. © 2018 Society of Plastics Engineers

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“…In composites, matrix performs essential functions such as to protect the reinforcement from the environment, ensure a homogeneous distribution of applied load stress to the reinforcement, and provide a stable shape of the final composite. On the other hand, the reinforcement, were natural fibers appears as a constituent, performs a structural function increasing the matrix properties [28]. The reinforcing effect in composites associated to vegetable fiber is related to the nature of cellulose and its crystallinity A high cellulose content and low microfibril angle are desirable properties in fiber to be used as reinforcement in polymer composites that require high mechanical performance.…”

Section: Natural Fibers and Polymeric Matrices: Composites Conceptionmentioning

confidence: 99%

Bagasse sugarcane fibers as reinforcement agents for natural composites: description and polymer composite applications

Díaz-Ramírez

Maradei

Vargas-Linares

2019

revuin

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Even some natural resources, considered as waste, can be used for manufacturing a lot of products with enhanced sustainable properties, such as cellulosic bagasse. In this review was performed in order to gather state of the art about natural fibers structure, properties, and applications in polymer composites reinforcement, giving an approach of bagasse sugarcane fibers. The literature was done in different scientific databases;more than 50 papers wereanalyzed. The vegetable fibersare an extensive and multipurpose group, bagasse sugarcane fibers emerge as a remarkable renewable resource, due to their suitable properties and a large amount of available resources worldwide. Nevertheless, this kind of products require the use of adequacy physical and chemical treatments in order to achieve an adequate proper interaction with polymer matrices, additionally, other characteristics as the geometry and fiber content can influence the performance as reinforcements in composite materials.

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Effect of microcrystalline and nanocrystals cellulose fillers in materials based on PLA matrix

Cited by 75 publications

References 15 publications

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO₂ Composites

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO₂ Composites

Biocomposite films based on poly(lactic acid) and chitosan nanoparticles: Elaboration, microstructural and thermal characterization

Bagasse sugarcane fibers as reinforcement agents for natural composites: description and polymer composite applications

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Effect of microcrystalline and nanocrystals cellulose fillers in materials based on PLA matrix

Cited by 75 publications

References 15 publications

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO2 Composites

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO2 Composites

Biocomposite films based on poly(lactic acid) and chitosan nanoparticles: Elaboration, microstructural and thermal characterization

Bagasse sugarcane fibers as reinforcement agents for natural composites: description and polymer composite applications

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Product

Resources

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Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO₂ Composites

Properties of Poly(Lactic Acid) Filled with Hydrophobic Cellulose/SiO₂ Composites