Effects of shell powder size and content on the properties of polycaprolactone composites

Abstract

In this work, the effects of particle size and content of clam shell powder (CSP) on the mechanical properties and microstructure of clam shell powder‐polycaprolactone (CSP‐PCL) composites were studied. Accordingly, shell powder with particle size of 50, 100, 200, and 400 meshes, and CSP content of 30, 40, 50, and 60 wt%, respectively, were utilized to prepare CSP‐PCL composites. The interface structure and properties of CSP‐PCL composites were investigated by infrared spectroscopy (IR), X‐Ray diffraction (XRD), scanning electron microscopy (SEM), differential scanning calorimetry, thermogravimetric analysis (TGA), and tensile tests. The results showed that the tensile properties of the composite materials correlated with the particle size and content of the filler. For instance, the smaller the particle size of CSP (400 meshes), the better the tensile properties of the composite. What is more, the tensile properties of the composites were negatively affected by the amount of CSP content. In terms of microstructure, shell powder particles could disperse uniformly in the PCL matrix, and the CSP‐PCL composites with polyurethane prepolymer as compatibilizer gave a better compatibility.

Influence of Starch on the Structure–Properties Relationship in Polyethylene Glycol/Polycaprolactone Diol Polyurethanes

“…Additionally, the reduction in tensile strength of P1 composites filled with a concentration of AL-N that is greater than 1% wt indicates that the increase in the filler inside the polyurethane matrix permits formations of agglomerates and voids inside these agglomerates ( Figure 5 B), which reduce specific contact area at the interface filler–matrix [ 64 ]. These results are consistent with similar behavior reported in the literature for composite materials [ 51 , 62 , 63 , 64 ].…”

“…Tensile strength decreased to a significant degree when AL-Z was added to polymer matrices; additionally, the inclusion of AL-N did not result in a different statistical significance in tensile strength (except for P1-1% AL-N which increased), as can be noted in Table 2 . This behavior is attributed to the thermodynamic compatibility between fillers and polyurethane matrices, which allude to the capacity to form hydrogen bonding at the interface, that intermolecular interactions adhere the surface of filler to the polymeric matrix, permitting the energy transmission on the boundaries of each material, then AL-Z acts as an inert material caused to not formations of hydrogen bonding at the interface with polyurethane in comparison with AL-N; therefore, starch modified with a zwitterion moiety creates defected areas that do not allow the transmission of energy when the composite is stretched, decreasing the tensile strength [ 51 , 62 , 63 ]. Additionally, the reduction in tensile strength of P1 composites filled with a concentration of AL-N that is greater than 1% wt indicates that the increase in the filler inside the polyurethane matrix permits formations of agglomerates and voids inside these agglomerates ( Figure 5 B), which reduce specific contact area at the interface filler–matrix [ 64 ].…”

Antioxidant activity of mango seed wax additive on the properties of poly(lactic acid) transparent films for food packaging application

“…[ 58 ] In another study, the incorporation of ethylene glycol diglycidyl ether and organically modified montmorillonite into the PLA matrix highly improved its performance as a gas barrier film. [ 59 ] Wang et al [ 60 ] studied lignin as filler for improving the oxygen barrier properties of PLA.…”

Think big, see small—A review of nanomaterials for neural interfaces

“…Moreover, developing soft materials such as conductive hydrogel is the hot topic in the recent and coming few years. [120] Doping CPs, carbon materials or other nanoparticles in conductive hydrogel with desirable nanostructure would provide a proper abiotic/biotic interface. The mechanism of electrode/tissue interaction needs urgently to be deciphered, in order to obtain a robust and long-lasting neural electrode system.…”