Physical properties of simul (red-silk cotton) wood (Bombax ceiba L.) chemically modified with styrene acrylonitrile co-polymer and nanoclay

Abstract

Wood plastic composites have been prepared based on simul wood ( Bombax ceiba L.), which was vacuum impregnated with the styrene acrylonitrile (SAN) co-polymer nanoclay (nnc) intercalating system in the presence of glycidyl methacrylate (GMA), a crosslinking agent. The impact of nanoclay was investigated on the mechanical, thermal, dynamic mechanical behavior, and the biodegradability of the resultant wood polymer nanocomposite (WPC nnc ) was investigated. The tensile strength, tensile modulus, fl exural strength, and fl exural modulus of the composite were relatively higher in the presence of 2 phr nanoclay. The limiting oxygen index values showed self-extinguishing behavior of the WPC nnc . Furthermore, the storage moduli (E ′ ) and damping index (tan δ ) of these products were high. WPC SAN/GMA/nnc exhibit higher biodegradability compared to WPC SAN/GMA .

Study on properties of simul wood (Bombax ceiba L.) impregnated with styrene acrylonitrile copolymer, TiO2, and nanoclay

“…With the incorporation of nanoclay and SAN into wood, a shifting of crystalline peak of wood from higher to lower angle as well as disappearance of diffraction peak of nanoclay was observed. It could be said that either the full expansion of the clay gallery occurred, which was not possible to detect by XRD, or the clay layers became delaminated and no crystal diffraction peak appeared [14]. Curves f-h show the diffractograms for wood samples treated with SAN and different percentages of TiO 2 /nanoclay.…”

“…Preparation of styrene acrylonitrile copolymer SAN was prepared in similar manner as described in our earlier communication [14].…”

“…In all the cases, the swelling was less in hydrochloric acid compared to sodium hydroxide solution. This may be possibly due to the increase in interaction by sodium hydroxide with wood cellulose and clay layers [14].…”

“…The preparation of wood polymer nanocomposites (WPNCs) based on impregnation of water soluble thermosetting polymer and clay and study on its physical, mechanical properties enhancement has been found in the literature [11,12]. Water repellency, dimensional stability, mechanical, and thermal properties of wood polymer/clay nanocomposite prepared by vacuum impregnation of styrene acrylonitrile copolymer (SAN) and nanoclay was also investigated in our previous studies [13,14]. Nourbakhsh et al [15] has studied the different physico-mechanical properties of fiber reinforced composites (FRC) prepared by using polypropylene and hybrid fillers consisting of lignocellulosic fillers (rice husk flour, beech bark flour) and mineral filler (nano-SiO 2 ).…”

Wood polypropylene composites prepared by thermally modified fibers at two extrusion speeds: mechanical and viscoelastic properties

“…The alkaline treatments did not show improvements, probably because of the increased presence of hydrophylic OH groups. Successful pretreatment of wood flour with hot water extraction (Pelaez-Samaniego et al 2013), extraction and delignification (Chen et al 2014), combination the flour with vitamin E (Peng et al 2014), chemical modification with styrene acrylonitril co-polymer and nanoclay (Devi et al 2012), are mentionable. Some of those above discussed parameters of WPC production which should be studied in relation to the present paper.…”