Determination of filler content in rice husk ash and wood‐based composites by thermogravimetric analysis

Abstract

SYNOPSISThree new types of fillers for polypropylene are investigated. The first two were derived from burnt rice husk ash (RHA), whereas the third, a wood-based filler, was processed from oil palm trunk. One important characterization of the composites involves the checking for the actual filler content and filler distribution within the matrix. An analytical technique is described here for computation of the filler content in the composites based on a simple expression derives from thermogravimetric analyses. For filler with volatiles such as the black RHA, the derived expression was pt = 1 0 6 ( r h / m ) , and for easily burnt fillers (wood-based), the expression was p f = 156(md/m,). The technique has shown good agreement and consistency between analyzed and actual filler contents and a uniform filler distribution within the polypropylene matrix.

Preparation and characteristics of polyurethane made with polyhydric alcohol‐liquefied rice husk

“…Therefore, the ash of liquefied rice husk is approximately 4.5%. Previous studies demonstrated rice husk ash also used as filler for increasing the thermal stability of PU and wood composites because the ash obtained after burning the rice husk contains more than 90% silica . Rice husk ash provides a renewable source of inorganic constituents.…”

“…Rice husk ash is often added to polymer formulations and plays the role as rigid filler. Research efforts have been devoted to exploring the use of rice husk silica in manufacture of advanced polymeric materials …”

Thermal Degradation of Natural Fiber-reinforced Polypropylene Composites

“…Coutinho et al reported higher thermal stability for wood fibers coated with PP [7]. Ahmed Fuad et al suggested a technique to use TGA for determining filler content in PP composites [8]. Heating rate also affects polypropylene thermal degradation and the effect is more considerable in air environment than in inert environment [9].…”

Rheological, thermal and morphological properties of polyethylene terephthalate/polyamide 6/rice husk ash composites

“…The filler content was estimated from the results of TG according to the equations described by Fuad et al 46 and Nabinejad et al 47 The general expression was written as: where pf is the percentage filler content; rb , the mass of the filler residue after the thermogravimetric scan; m, the mass of the composite sample in the thermogravimetric analysis; and ω , a constant related to the mass loss of the volatiles in the filler.…”