Effect of Nanosilica on Thermal, Flammability, and Morphological Properties of Wf/RPS-Based Nanocomposites

Abstract

KIAEI, M.; AMIRI, H.; SAMARIHA, A.; AMANI, N. Effect of nanosilica on thermal, flammability, and morphological properties of WF/rPS-based nanocomposites. CERNE, v. 24, n. 1, p. 59-66, 2018. HIGHLIGHTSThe results showed that the addition of nanosilica increased the thermal stability of the nanocomposite.It was determined that increasing of nano particles to more than a determined level reduced the Limited oxigen index and flammability.The data from thermo gravimetric analysis (TGA) indicated the nanosilica greatly enhanced the thermal stability. ABSTRACTThe present study considered the effect of nanosilica levels on the thermal, flammability, and morphological properties of nanocomposites made of wood flour and recycled polystyrene. To do so, the recycled polystyrene (50%), wood flour (50%), nanosilica (four levels of nanosilica; 0, 2, 4 and 6 phc (parts per hundred compounds)), and maleic anhydride, grafted with polypropylene (at a constant level of 3 phc) were mixed by a twin-screw extruder; then standard experimental samples were made using a hand pressing method. Next, the thermal and flammability properties were measured. The results showed that increasing of nanosilica content to 6 phc by weight increased thermogravimetric analysis (TGA) of nanocomposites; in addition, the limited oxygen index increased. Moreover, scanning electron microscopy (SEM) indicated that an increasing of nanosilica increased compatibility so that better link and adherence was observed among the fiber and matrix material.

Effect of wood flour and nano‐SiO2 on stimulus response, mechanical, and thermal behavior of 3D printed polylactic acid composites

“…Thermal degradation of ceramic nano-SiO 2 is much more than polymer PLA. It is also in agreement with the literature31 in which it is reported that high surface area of nano-SiO 2 forming nonburning char with proper coverage results into enhancement in thermal stability of composite materials.…”

Rice Husk Ash/Silicone Rubber-Based Binary Blended Geopolymer Coating Composite: Fire Retardant, Moisture Absorption, Optimize Composition, and Microstructural Analysis

“…A higher silica content resulted in improved thermal properties of a material [ 51 ]. In addition, calcination at a high temperature above 800 °C resulted in a tremendous decrease in the number of black particles, while the number of white creamy silica particles represented by the bright appearance of ash increased.…”

Evaluation of microstructure, thermal, and mechanical properties of the green lignin‐based polyurethane/hydrophobic silica nanocomposite foam

“…It has been found 34 that weight loss step, at about 300°C might initiate the decomposition of the hard segment of PU. With an increase in the weight percentage of the SNP in the SLPUF samples, the height of the related peak in the DTG curve decreased, which can be due to the thermal stability of the SLPUF samples in the presence of the nanoparticles and difficulty in heat transfer in the foams due to the barrier effect of the SNP 40 …”

“…These results indicated higher degradation stability for the SLPUF samples. SNP can act as physical crosslink points with a high melting point so that, they cause the heat insulation and limit the movement of long molecular chain in the PU 34,40,41 . Enhancement of thermal stability in the PUFs has also been reported following incorporation of the SNP 18,41 …”