Polyethylene Low and High Density-Polyethylene Terephthalate and Polypropylene Blend as Matrices for Wood Flour

Abstract

This study present a composite material made of four thermoplastic polymers and wood sawdust. The wood sawdust of size 630, 315, 160 µm and plastic waste containing 3,91% of polyethylene terephthalate (PET), 87,62% of High-density polyethylene (HDPE), 7,23% of Low-density polyethylene (LDPE) and 1.21% of Polypropylene (PP) have been transformed in composites wood/polymer by extrusion. The mechanical and thermal properties have been studied through tensile test and a thermogravimetric analysis. The weight ratio of the cellulosic materials to polymer matrix was 25:75(w:w). Morphological study was done on the rupture surface on samples to appreciate the adherence of wood sawdust/matrix. The study shows that the presence of the wood sawdust increases the modulus of elasticity (MOE) of the composite by conferring a better rigidity. Also, we see that wood sawdust increases the thermal stability of the composite.

Digital twins for selecting the optimal ventilated strawberry packaging based on the unique hygrothermal conditions of a shipment from farm to retailer

“…Most of these reactions can be adequately modeled using first-order kinetics (Corradini, 2018;Valentas et al, 1997). Our study (Auras et al, 2005;Bastarrachea et al, 2011;Guidigo et al, 2017;IDMC, 2021;Lopes and Felisberti, 2004;Ngo et al, 2016;Wu et al, 2021) Uncoated paperboard 0.51 0.066 1355 700 4.3 × 10 − 13 450 (Bastarrachea et al, 2011;Cardoso and Labuza, 1983;Etuk et al, 2011;Latif et al, 2015;Odusote et al, (Bastarrachea et al, 2011;Ngo et al, 2016;Wang et al, 2018;Wu et al, 2021) modeled the respiration-driven biochemical fruit quality through an overall fruit quality index (I f , %) (Tijskens and Polderdijk, 1996). We employed a first-order kinetic model, which signifies an exponential decay in fruit quality as a function of time (Eq.…”

Shellac: From Isolation to Modification and Its Untapped Potential in the Packaging Application

“…Moreover, the insolubility of Shellac in water has led to the creation of nanoparticles by antisolvent precipitation methods using ethanol and water systems in the presence of gums [53]. The density of Shellac ranges from 1.035 to 1.20 gm/cm 3 , which makes it sink in water, thus limiting water pollution, unlike most polymers used in packaging, such as polyethylene (PE) and polypropylene (PP) [62] with density lower than 1 gm/cm 3 . Shellac's tensile strength ranges from 5.70 to 14 MPa, near the value of LDPE and PHB [63,64].…”