High compressive strength of home waste and polyvinyl acetate composites containing silica nanoparticle filler

Abstract

Simple mixing and hot pressing methods were used to make composites from home waste-in particular, paper and dry leaves-using polyvinyl acetate (PVAc) as an adhesive and silica nanoparticles as filler. The optimum composition for the strongest composites, in terms of compressive strength, had a mass ratio of silica nanoparticles/ PVAc/(paper ? dry leaves) of 3:80:280. With this mass ratio, a compressive strength of 68.50 MPa was obtained for samples prepared at a pressing temperature of 150°C, pressing pressure of 100 MPa, and pressing time of 20 min. The addition of silica nanoparticles increased the compressive strength by about 50%, compared with composites made without the addition of nanosilica (45.60 MPa). Higher compressive strength was obtained at a higher pressing pressure. At a pressing pressure of 120 MPa, pressing temperature of 150°C, and pressing time of 20 min, a compressive strength of 69.10 MPa was obtained. When the pressing time was increased to 45 min at a pressing pressure of 120 MPa, a compressive strength of 84.37 MPa was measured. A model was also proposed to explain the effects of pressing pressure and pressing time on compressive strength. The model predictions were in good agreement with the experimental data.

A Fire-Retardant Composite Made from Domestic Waste and PVA

“…The highest compressive strength obtained was 63 MPa. This value is equivalent to the strength of the composite we reported earlier for composites made from leaf and paper waste whose composite strength reached 55.7 MPa [15]. Figure 8 shows that the silica in the rice husk without milling yielded the highest compressive strength of approximately 63 MPa using 750 mg of rice husk (a mass fraction of 0.043 g/g).…”

“…The highest compressive strength obtained was 63 MPa. This value is equivalent to the strength of the composite we reported earlier for composites made from leaf and paper waste whose composite strength reached 55.7 MPa [15].…”

Mechanical and rheological properties of partial replacement of carbon black by treated ultrafine calcium carbonate in natural rubber compounds

“…Mostly rubber products as shoes, soles, sandals, etc. Employed commercial reinforcement llers to improve mechanical properties as silica [1][2][3], carbon black [4][5][6] or even to reduce the rubber mass, loading with calcium carbonate [7,8], kaolin [9,10], asphalt [11], grits waste [12], sludge ash [13] and bio composites [14,15]. The size and shape homogeneity are usually considered, improving surface adhesion in the polymer matrix [7] and, enhancing the reinforcement effect.…”

MANGO (Mangifera indica L.) LEAVES WASTE/POLYVINYL ACETATE BIOCOMPOSITE FOR BUILDING MATERIALS APPLICATION

“…Therefore, in this work, we have developed a leaves waste biocomposite using the phenolic or flavonoid compounds of the fiber and minerals in mango leaves associated and bound with PVAc into matrix. The PVAc was used since its binding properties make up strong mechanical properties of composite and has been widely used in several composites engineering, such as in-home waste composite (Masturi et al, 2011a), conducting composite (Eraldemir et al, 2008), and silver-iron photocatalytic composite (Ghanbari et al, 2016).…”