Synthesized Silica Powder from Rice Husk for Printing Raw Materials Application

Abstract

Rice husk is a form of agricultural biomass that provides an abundant silicon dioxides source. This study use rice husk ash as a material to prepare silica. Silica powder has been synthesized by the refluxing of rice husk ash with HCl 1,2 and 3 M at different time (60 and 120 min.) and subsequently adjusting the pH using 1 M. NaOH. The silicon dioxide extraction yield reached 85% and was effect by concentration of HCl solution and reaction time. The structure of the obtained silica powder were characterized by X-Ray Fluorescence (XRF), X-Ray diffraction (XRD), CIE L*a*b* (Visible spectrophotometer) and Scanning Electron Microscope (SEM). The highest purity of silica sample were 98.7% SiO2, CIE L*a*b* = 94.79 +0.48 +1.24, ∆E ≈ 3.28 (white power) and 2Ɵ = 22o (silica). Particle had a uniform size less than 3 μm. The objective of the next study will applied synthesized silica that enhances the print quality of the printing substrates.

Review on the physicochemical treatments of rice husk for production of advanced materials

“…The reaction (40), is the special characteristic of this method.It is important in the activation process, amorphous carbon and silica in the rice husk disappear through the above reactions and pore structure is formed.…”

“…In addition, rice husk ash can be used as natural silica (SiO 2 ) source for surface improvement of paper to gain better printability. This coating layer surface will reduce the ink penetration into the paper structure by reducing coating permeability, hence improved water fastness [40].…”

Value Chain Analysis of Rice Industry by Products in a Circular Economy Context: A Review

“…In addition, a paper's printing quality might be enhanced by using rice husk ash. Because rice husk ash contains more silica, it can improve the paper's surface quality, and the coating layer it generates reduces the quantity of ink penetrating the paper [222]. Additionally, some researchers have studied pigments made from rice husk and ash [175].…”

Enhancement of flexographic print quality on bleached kraft liner using nano-silica from rice husk

“…The characterization of fine silica powder and the effects of synthesized silica in coating bleached kraft liner for inkjet printing have been studied [18,19]. The silica coating results in good printability, vivid colors and sharper characters as well as images are achieved due to better reception of inks by the paper structure.…”