A study on the thermal and mechanical properties of composites made of nanolignocellulose and Pebax^® polymer

Abstract

This study aimed at producing the biodegradable composite from lignocellulose nanofibers (LCNFs) and Pebax® thermoplastic elastomer. For this purpose, LCNFs at different levels of 0, 1, 3, and 5% were considered. The LCNFs were prepared by benzyl alcohol and then mixed with Pebax®. The liquid phase of the LCNFs and soluble polymer was prepared and then the masterbatches were mixed in an internal mixer (Model 815802, Brabender, Germany). The mixtures from the internal mixer were put into a hot press and test samples were compress-molded. The physical properties results indicated that water absorption and thickness swelling decreased by the addition of more amount of LCNF. By the addition of LCNFs to polymer, the tensile strength and modulus and impact strength were increased compared to samples without LCNF. No regular trend of enthalpy changes was observed as the content of LCNF changed. When the LCNF concentration was increased to 5%, the crystallization temperature was increased. As the LCNF concentration increased to 3%, the glass transition temperature ( Tg) was decreased, whereas by incorporating more LCNFs, the Tg was increased. The result of the Fourier transform infrared spectra showed the peaks at 1740 cm−1 which indicated the presence of polyamide bonds. Also, new peaks were observed in the range of 1400–1500 cm−1 that was probably related to the presence of C−C bonds of glucose at LCNFs chains.

Utilization of copper sulphide nanoparticles for the development of cashew tree gum/ chitin biopolymer blend nanocomposites

“…The demand for a super performing natural material has prompted researchers worldwide for the enhancement of mechanical and thermal properties of cashew gum. 13–15…”

“…The demand for a super performing natural material has prompted researchers worldwide for the enhancement of mechanical and thermal properties of cashew gum. [13][14][15] The usual strategy for this is through the blending of different polymers and the inclusion of high performing synthetic nanoparticles. Such a blending of two or more natural polymers can result in a novel blend with structurally and functionally similar or dissimilar components.…”

Polyether Block Amide as Host Matrix for Nanocomposite Membranes Applied to Different Sensitive Fields

“…Therefore, the loading of wood fibres in Pebax ® delays the thermo-oxidation in air due to the formation of char residue in the earlier stages of degradation. Tensile strength, modulus and impact strength were significantly increased upon the addition of nanolignocellulose (LCNFs, up to 5 wt%) to Pebax by compression moulding using a hot press [119]. These nanocomposites combine biodegradability with improved water absorption and thickness swelling.…”

Thermoplastic Polyamide Elastomers: Synthesis, Structures/Properties, and Applications

“…Shortly afterward, more types of TPAEs were synthesized on the laboratory scale; some were patented and commercialized with crucial industrial applications. [ 17 ] Whereafter, the structures and properties of these commercial TPAE products have been extensively investigated by many research groups, [ 18–20 ] further profoundly enhancing their comprehensive properties. Now TPAEs have become highly significant elastomer materials due to their excellent low‐temperature impact resistance, good flexibility, high elastic recovery, and good processability.…”