Extraction Cellulose From Rice Husk

Abstract

Abstract. Cellulose from rice husk has been successfully synthesized. Rice husk is an abundant agricultural waste and has a high cellulose content. Bioconversion of rice husk into cellulose begins with the stages of delignification and bleaching. The resulting cellulose was characterized using FTIR and XRD. The IR spectra show a strong absorption peak at 3444.87 cm− 1 which is associated with stretching vibrations O − H (hydrogen bonds between molecules), absorption peaks at 1033.85 cm− 1 are identified as stretching C − O − C which is β bond −1,4 glycosidic from cellulose. XRD shows the particle size of cellulose which is 3.44 nm and has crystallinity of 58.73%. These results indicate that cellulose from rice husk has good characteristics. Keywords: Rice Husk, Cellulose, FTIR, XRD

A one-step facile process for extraction of cellulose from rice husk and its use for mechanical reinforcement of dental glass ionomer cement

“…Cellulosic bers in plants are attached to other components such as hemicellulose or lignin. [16][17][18] Therefore, the extraction procedure must be efficient in removing all other plant components that may affect the purity as well as the properties of the cellulose. [19][20][21] Obtaining cellulose from rice husks can be achieved via chemical degradation, mechanical processing, or a combination of both techniques.…”

“…[19][20][21] Obtaining cellulose from rice husks can be achieved via chemical degradation, mechanical processing, or a combination of both techniques. [16][17][18] Still, choosing the most suitable technique relies on the required nal size of the bers which can be in the micro-or the nanosize range.…”

“…Finally, the post-bleaching step is where the bleached product is washed thoroughly to remove any remnants of impurities from the extracted cellulose. [16][17][18] Of note, the treatment of the bleached cellulose with concentrated sulfuric acid is widely used for the removal of the amorphous cellulose and obtaining cellulose nanocrystals.…”

Caracterización estructural, térmica y morfológica de Crescentia cujete (totumo) con potencial uso como polímero biodegradable

“…Una de las mayores fuentes de polímeros naturales son las biomasas lignocelulósicas provenientes de la madera (Froschauer et al 2013) y otros productos de origen vegetal, como el bagazo de caña de azúcar (Nkosivele et al 2018), la cascarilla de arroz (Yunus, 2019), el pseudotallo de plátano (Thi Thuy Van et al 2022), las hojas de la corona de la piña (Tanpichai et al 2019), las cáscaras del coco (Rosa et al 2010) o el tallo de la planta de tomate (Kassab et al 2020b). Estos materiales son ricos en celulosa, hemicelulosa y lignina y son utilizados en una variedad de aplicaciones, como la fabricación de papel, cartón, paneles de fibra de madera y productos biodegradables.…”