Preparation of bamboo-derived structured cellulose and its evaluation as resin composite materials. (June 2023)

• Record Type: Journal Article
• Authors: Ishimaru, Hiroya; Matsumoto, Misuzu; Yoshikawa, Takuya; Sato, Motohiro; Nakasaka, Yuta; Masuda, Takao
• Is Part Of: Biomass and bioenergy. Volume 173(2023)
• Publication Date: 2023-06
• Subjects: Bamboo -- Structured cellulose -- Polymer composite -- Organosolv treatment; Biomass energy -- Periodicals; Biomass -- Periodicals; Energy-Generating Resources -- Periodicals; Bioénergie -- Périodiques; 333.9539
• DOI: 10.1016/j.biombioe.2023.106778
• Languages: English
• ISSNs: 0961-9534

Abstract

Abstract: Bamboo, a highly productive and renewable resource, shows a high strength among other biomass resources. Composites of lignocellulose with a polymer are attracting attention as a new material for buildings and furniture according to recent demands for sustainable development goals (SDGs). The present report describes the first preparation of a composite with resin using an organosolv technique with water and 1-butanol solvent as pre-treatment of bamboo. Organosolv treatment at 453 K selectively removed lignin and hemicellulose from bamboo without causing over-decomposition of cellulose. The delignified bamboo was impregnated with a copolymer of methyl methacrylate and hydroxyethyl methacrylate using a decompressed method. The structure of the bamboo-derived cellulose piece remained the same as it was after polymer impregnation without any molding process. Amount of the polymer impregnated into the bamboo after organosolv was significantly greater (34%) than that without organosolv. Impregnated state in the delignified bamboo was evaluated using morphological observations and determination of the properties of mesopores, which formed in the gap between cellulose microfibrils during organosolv. Results indicated that the composite of bamboo-derived structured cellulose with the co-polymer was prepared successfully, and the vascular bundles, including cell walls as well as parenchyma cells, were impregnated with the resin. Compressive strength of impregnated delignified bamboo was evaluated and found to be 12.7 MPa. Graphical abstract: Image 1 Highlights: Bamboo-derived composites were prepared by organosolv and polymer impregnation. Lignin and hemicellulose were solubilized similarly in both of powder and piece. Cellulose scaffolds remained before and after impregnation without any molding. Polymer was incorporated significantly using impregnated delignified bamboo. Vascular bundles of delignified bamboo were impregnated with polymer.