Eco-production of silica from sugarcane bagasse ash for use as a photochromic pigment filler

Abstract

eco-production of silica from sugarcane bagasse ash for use as a photochromic pigment filler prinya chindaprasirt 1,2 & Ubolluk Rattanasak 3 ✉ Sugarcane bagasse is a significant renewable energy source for the sugar and bioethanol industries. Bagasse ash is the waste from the combustion process and is mostly disposed of as landfill. Only a small quantity of bagasse ash is utilized as pozzolan in concrete, and a considerable quantity is left unused due to its high carbon and crystallite content. Generally, bagasse ash is rich in silica (SiO 2), and it is thus an alternative source for silica extraction. In this paper, a low-energy and low-chemical consumption method is proposed to obtain silica from bagasse ash using alkali extraction and acid precipitation. The physical and chemical properties of the extracted silica are described. A silica yield of 80% and moisture absorption of 73% were achieved. The silica had amorphous phases and was light gray in color owing to the presence of carbon from incomplete combustion. Bagasse silica was used as an extender filler in an expensive photochromic pigment to increase the bulk volume. It was found that a pigmentto-silica mass ratio up to 1:10 could be used for thick-layer painting. However, a ratio of up to 1:3 is recommended for thin-layer screen-printing on fabrics. The bagasse ash silica-pigment blends have very good color fastness when washing; however, frequent aggressive washing should be avoided.

Isolation and Characterization of Fibrillar Nanosilica of Floral Origin: Cortaderia selloana Flowers as the Silica Source

“…The biogenic nano silica they successfully prepared from rice husk as the silica source shows the same XRD pattern of amorphous silica. The nanosilica synthesized from sugarcane bagasse also shows a broad XRD peak of 2θ around 23° [48]. These literatures are in line with the current study.…”

“…Recently nanostructure silica was extracted through alkali leaching method from various bio-precursors like banana peel, orange peel, coconut husk, wall nut shell and ground nut shell [32]. Sugarcane bagasse ash was promised to be excellent source for silica preparation [33]. Although extensive literature exists on the physical and chemical phenomena of silica produced from sodium silicate precipitated with acids and also from rice husk and other biogenic sources.…”

Effect of Calcination Temperature on the Synthesis of Silica from Bagasse

“…Another study showed that silica extraction from bagasse ash with pretreatment using HCl obtained more silica content when compared without treatment [22]. The reactions that occur include the following [14].…”

“…Several silica applications include catalysts, cosmetics, ceramics, cement, pharmaceuticals, and detergents [5,12]. Silica is also commonly applied as a precursor for the synthesis of inorganic and organometal substances, as a coating for electronic and optical materials, as a filler for composites, and as a filler in photochromic pigment [13,14]. Silica has a large pore and surface area that allowed it to be utilized as an adsorbent, such as removing methylene blue dye, Janus Green B, Reactive Black 5, and dimethyl phthalate [15].…”

The Production of Biogenic Silica from Different South African Agricultural Residues through a Thermo-Chemical Treatment Method

“…For an example, Worathanakul et al [31] pre-treated sugarcane bagasse (i.e., a mixture of fiber and pith) with 3M HCl to produce biogenic silica with a silica content of 89 wt% compared to 94.8 and 94.3 wt% for pith and fiber obtained in this work, respectively. On another study, [32] pre-treated sugarcane bagasse with 1M HCl and obtained an even lower silica content of 66 wt%. In yet another recent study a silica content of 85.6 wt% was obtained from the pre-treatment of sugarcane bagasse with 9% sulfuric acid [33].…”