Chitin Nanofibrils in Poly(Lactic Acid) (PLA) Nanocomposites: Dispersion and Thermo-Mechanical Properties

Chitin-nanofibrils are obtained in water suspension at low concentration, as nanoparticles normally are, to avoid their aggregation. The addition of the fibrils in molten PLA during extrusion is thus difficult and disadvantageous. In the present paper, the use of poly(ethylene glycol) (PEG) is proposed to prepare a solid pre-composite by water evaporation. The pre-composite is then added to PLA in the extruder to obtain transparent nanocomposites. The amount of PEG and chitin nanofibrils was varied in the nanocomposites to compare the reinforcement due to nanofibrils and plasticization due to the presence of PEG, as well as for extrapolating, where possible, the properties of reinforcement due to chitin nanofibrils exclusively. Thermal and morphological properties of nanocomposites were also investigated. This study concluded that chitin nanofibrils, added as reinforcing filler up to 12% by weight, do not alter the properties of the PLA based material; hence, this additive can be used in bioplastic items mainly exploiting its intrinsic anti-microbial and skin regenerating properties.

[1]  K. Oksman,et al.  Triethyl Citrate (TEC) as a Dispersing Aid in Polylactic Acid/Chitin Nanocomposites Prepared via Liquid-Assisted Extrusion , 2017, Polymers.

[2]  Rafael Auras,et al.  A roadmap towards green packaging: The current status and future outlook for polyesters in the packaging industry , 2017 .

[3]  R. Marchessault,et al.  Infrared spectra of crystalline polysaccharides. V. Chitin , 1960 .

[4]  V. Ivanenko,et al.  3D Chitin Scaffolds of Marine Demosponge Origin for Biomimetic Mollusk Hemolymph-Associated Biomineralization Ex-Vivo , 2020, Marine drugs.

[5]  A. Domb,et al.  Poly(lactic acid)‐based nanocomposites , 2017 .

[6]  Patrick C. Lee,et al.  Fabrication and characterization of melt-blended polylactide-chitin composites and their foams , 2011 .

[7]  Manjusri Misra,et al.  Perspective on Polylactic Acid (PLA) based Sustainable Materials for Durable Applications: Focus on Toughness and Heat Resistance , 2016 .

[8]  A. N. Nakagaito,et al.  Polylactic Acid Reinforced with Mixed Cellulose and Chitin Nanofibers—Effect of Mixture Ratio on the Mechanical Properties of Composites , 2018, Journal of Composites Science.

[9]  K. Oksman,et al.  Effect of Chitin Nanocrystals on Crystallization and Properties of Poly(lactic acid)-Based Nanocomposites , 2020, Polymers.

[10]  K. K. Gadgey,et al.  STUDIES ON EXTRACTION METHODS OF CHITIN FROM CRAB SHELL AND INVESTIGATION OF ITS MECHANICAL PROPERTIES , 2017 .

[11]  H. Ehrlich,et al.  Chitin-based scaffolds are an integral part of the skeleton of the marine demosponge Ianthella basta. , 2009, Journal of structural biology.

[12]  J. Hašek,et al.  Rheological study of chitosan acetate solutions containing chitin nanofibrils. , 2014, Carbohydrate polymers.

[13]  K. Oksman,et al.  Plasticized polylactic acid nanocomposite films with cellulose and chitin nanocrystals prepared using extrusion and compression molding with two cooling rates : effects on mechanical, thermal and optical properties , 2016 .

[14]  R. Scaffaro,et al.  Polysaccharide nanocrystals as fillers for PLA based nanocomposites , 2017, Cellulose.

[15]  M. Rinaudo,et al.  Chitin and Chitosan Preparation from Marine Sources. Structure, Properties and Applications , 2015, Marine drugs.

[16]  Juming Yao,et al.  From Cellulose Nanospheres, Nanorods to Nanofibers: Various Aspect Ratio Induced Nucleation/Reinforcing Effects on Polylactic Acid for Robust-Barrier Food Packaging. , 2017, ACS applied materials & interfaces.

[17]  A. Daugaard,et al.  Hybrid poly(lactic acid)/nanocellulose/nanoclay composites with synergistically enhanced barrier properties and improved thermomechanical resistance , 2016 .

[18]  D. Bogdał,et al.  3D Hierarchical, Nanostructured Chitosan/PLA/HA Scaffolds Doped with TiO2/Au/Pt NPs with Tunable Properties for Guided Bone Tissue Engineering , 2020, Polymers.

[19]  K. Oksman,et al.  Functionalized blown films of plasticized polylactic acid/chitin nanocomposite: Preparation and characterization , 2016 .

[20]  Thomas F. Garrison,et al.  Bio-Based Polymers with Potential for Biodegradability , 2016, Polymers.

[21]  A. Müller,et al.  Isothermal Cold-Crystallization of PLA/PBAT Blends With and Without the Addition of Acetyl Tributyl Citrate , 2012 .

[22]  Roberto Nisticò,et al.  Aquatic-Derived Biomaterials for a Sustainable Future: A European Opportunity , 2017 .

[23]  P. Cinelli,et al.  Composition dependence of the synergistic effect of nucleating agent and plasticizer in poly(lactic acid): A Mixture Design study , 2016 .

[24]  L. Robeson,et al.  Polymer nanotechnology: Nanocomposites , 2008 .

[25]  Xuezhu Xu,et al.  Comparison between Cellulose Nanocrystal and Cellulose Nanofibril Reinforced Poly(ethylene oxide) Nanofibers and Their Novel Shish-Kebab-Like Crystalline Structures , 2014 .

[26]  P. Cinelli,et al.  Degradability and sustainability of nanocomposites based on polylactic acid and chitin nano fibrils , 2017 .

[27]  Luca Panariello,et al.  Chitin nanofibrils in renewable materials for packaging and personal care applications , 2018 .

[28]  M. Jonoobi,et al.  Mechanical properties of cellulose nanofiber (CNF) reinforced polylactic acid (PLA) prepared by twin screw extrusion , 2010 .

[29]  Zora Strelcová,et al.  The structure and dynamics of chitin nanofibrils in an aqueous environment revealed by molecular dynamics simulations , 2016 .

[30]  Julia L. Shamshina,et al.  Ionic Liquid Platform for Spinning Composite Chitin–Poly(lactic acid) Fibers , 2018, ACS Sustainable Chemistry & Engineering.

[31]  John G. Lyons,et al.  Review of Multifarious Applications of Poly (Lactic Acid) , 2016 .

[32]  Yangbing Wen,et al.  Adsorption of polyethylene glycol (PEG) onto cellulose nano-crystals to improve its dispersity. , 2015, Carbohydrate polymers.

[33]  H. Naguib,et al.  Fabrication and Characterization of PLA/PHBV-Chitin Nanocomposites and Their Foams , 2014, Journal of Polymers and the Environment.

[34]  Henriette M.C. Azeredo,et al.  Antimicrobial nanostructures in food packaging , 2013 .

[35]  J. Araki,et al.  Preparation of sterically stabilized chitin nanowhisker dispersions by grafting of poly(ethylene glycol) and evaluation of their dispersion stability. , 2015, Biomacromolecules.

[36]  G. Torri,et al.  Structural differences between chitin polymorphs and their precipitates from solutions—evidence from CP-MAS 13C-NMR, FT-IR and FT-Raman spectroscopy , 1992 .

[37]  D. R. Paul,et al.  Formation of Co-continuous Structures in Melt-Mixed Immiscible Polymer Blends , 2003 .

[38]  Yimin Fan,et al.  Preparation of chitin nanofibers from squid pen beta-chitin by simple mechanical treatment under acid conditions. , 2008, Biomacromolecules.

[39]  S. Nair,et al.  Biomaterials based on chitin and chitosan in wound dressing applications. , 2011, Biotechnology advances.

[40]  Piotr Stepnowski,et al.  Application of Spectroscopic Methods for Structural Analysis of Chitin and Chitosan , 2010, Marine drugs.

[41]  N. Yan,et al.  Transformation of Chitin and Waste Shrimp Shells into Acetic Acid and Pyrrole , 2016 .

[42]  J. Araki,et al.  Steric Stabilization of a Cellulose Microcrystal Suspension by Poly(ethylene glycol) Grafting , 2001 .

[43]  Dagang Li,et al.  Homogeneous dispersion of chitin nanofibers in polylactic acid with different pretreatment methods , 2017, Cellulose.

[44]  Md. Iftekhar Shams,et al.  Flexible and transparent chitin/acrylic nanocomposite films with high mechanical strength , 2015, Fibers and Polymers.

[45]  F. Ciardelli,et al.  Poly(lactic acid) properties as a consequence of poly(butylene adipate-co-terephthalate) blending and acetyl tributyl citrate plasticization , 2008 .

[46]  G. Tsai,et al.  Antimicrobial activity of shrimp chitin and chitosan from different treatments and applications of fish preservation. , 2002 .

[47]  Paul Kiekens,et al.  Functional Textiles – From Research and Development to Innovations and Industrial Uptake , 2014 .

[48]  Simona Bronco,et al.  Plasticized and nanofilled poly(lactic acid)‐based cast films: Effect of plasticizer and organoclay on processability and final properties , 2013 .

[49]  P. Chang,et al.  Effect of Surface Acetylated-Chitin Nanocrystals on Structure and Mechanical Properties of Poly(lactic acid) , 2014 .

[50]  C. Vasile,et al.  Vegetable Additives in Food Packaging Polymeric Materials , 2019, Polymers.

[51]  Se-Kwon Kim.  Chitin, chitosan, oligosaccharides and their derivatives: biological activities and applications. , 2010 .

[52]  P. Saini,et al.  Poly(lactic acid) blends in biomedical applications. , 2016, Advanced drug delivery reviews.

[53]  J. Araki,et al.  Influence of reagent addition on carbodiimide‐mediated amidation for poly(ethylene glycol) grafting , 2002 .

[54]  Kuang Zhang,et al.  Facile route to produce chitin nanofibers as precursors for flexible and transparent gas barrier materials. , 2014, Biomacromolecules.