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Polymer Blend Nanocomposites Based on Cellulose Nanocrystals (CNC)

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Résumé

Cellulose nanocrystals (CNCs) have gained much more attention because they are biocompatible and biodegradable. Moreover, they have high elastic modulus and low density and they are based on the most abundant resources in the environment. They are now commercially available and used for many applications: adhesives, paper, paints and coatings, cosmetics and health care, electronics. As shown by Pr Carreau and Pr Heuzey’s teams it is possible to disperse CNCs into biodegradable matrices while using solvents 1. The selective dispersion of nanoparticles (NPs) into polymer blends, allows reaching peculiar morphologies and improving the final properties 2. This has been demonstrated by Taguet et al. for different nanoparticles (silica, kaolin, halloysite, magnesium dihydroxide) into a large number of polymer blends 3–5. It is proposed here to present first some previous work on the effect of localization of NPs into polymer blends on final properties. Then, the dispersion of CNCs into a blend based on biodegradable polymers (poly(lactic acid) and poly(butylene adipate-co-terephthalate), PLA/PBAT) will be discussed. 1wt% of freeze dried CNCs (supplied by FPInnovations) were added to 75/25 PLA/PBAT blends based on an amorphous and a semi-crystalline PLA (a-PLA and sc-PLA) using solution casting (in dimethylformamide, DMF) followed by melt mixing (under internal mixer). Figure 1 shows the complex viscosity data of CNC based PLA/PBAT blend nanocomposites.
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Dates et versions

hal-03437000 , version 1 (19-11-2021)

Identifiants

  • HAL Id : hal-03437000 , version 1

Citer

A. Taguet, M. Mohammadi, M.C. Heuzey, P.J. Carreau. Polymer Blend Nanocomposites Based on Cellulose Nanocrystals (CNC). EPNOE 2021 - The 7th International Polysaccharide Conference, Oct 2021, Nantes, France. ⟨hal-03437000⟩
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