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• Hemicellulose functions in plant cell walls by binding cellulose with lignin to provide structural rigidity, while also imparting flexibility and porosity.
• The study 'Recent breakthroughs in the valorization of lignocellulosic biomass' examines environmental crises in construction, advocates for sustainable material alternatives like cellulose, hemicellulose, lignin, silica, bamboo, and cork, and details technologies for valorizing lignocellulosic biomass (LCB) through extraction and purification.
• Barana et al. (2016) published 'Biorefinery Process for the Simultaneous Recovery of Lignin, Hemicelluloses, Cellulose Nanocrystals and Silica from Rice Husk and Arundo Donax' in Industrial Crops and Products, describing a method to extract multiple components from agricultural residues.
• Hemp hurds contain 18% to 27% hemicellulose and pectin, 21% to 28% lignin, 40% to 48% cellulose, 2.2% extractives, and 1.4% ash content, making them a viable option for use as a polymer reinforcement agent.
• Lignocellulosic biomass contains several key components, including cellulose, silica, lignin, and hemicellulose.
• Natural fibers are composed of either polysaccharides, such as cellulose, hemicellulose, and lignin, or proteins, such as fibroin and collagen.
• Mazumder and Zhang (2023) investigate the interaction between cellulose, hemicellulose, and lignin in the secondary cell wall of coconut endocarp in the journal Biomimetics.
• Cellulose and silica are the most frequently observed materials used for thermal insulation, with additional research available on the use of hemicellulose and lignin.
• Guo, Shen, Xiao, and Zhao (2011) conducted an experimental study on biomass pyrolysis focusing on the three major components: hemicellulose, cellulose, and lignin.
• Sun, Jing, Fowler, Wu, and Rajaratnam (2011) performed structural characterization and isolation of lignin and hemicelluloses from barley straw.
• Lignin, cellulose, and hemicellulose are components of food fibers that absorb water and bind harmful substances for elimination through feces.
• Hemp bast fibers are composed of 70% to 75% cellulose, 15% to 20% hemicellulose, 3% to 5% lignin, 0.8% pectin, 2% to 6% extractives, and 1% to 2% ash content, as reported by Manaia et al. (2019), Möller and Popescu (2009), and Zheljazkov et al. (2023).
• Liu et al. developed a method to extract pure lignin from Tobacco stalks using a hydrothermal process with phosphotungstic acid to selectively remove hemicellulose. The hydrothermal process occurs at 170 °C for 1 hour, while the pretreatment with 1% (w/v) phosphotungstic acid occurs at 130 °C for 1 hour. Following these steps, an alkali treatment with 14% NaOH and 0.5% Anthraquinone is performed to extract lignin through black liquor.
• The annual dry biomass production and composition of various crops are as follows: Rice (905 million tons, 37.0% cellulose, 16.5% hemicellulose, 13.6% lignin, 19.8% ash), Wheat (62 million tons, 40.2% cellulose, 38.8% hemicellulose, 17.0% lignin, 2.3% ash), Maize (2724 million tons, 42.7% cellulose, 23.2% hemicellulose, 17.5% lignin, 6.8% ash), Sugarcane (1048 million tons, 41.1% cellulose, 22.7% hemicellulose, 31.4% lignin, 2.4% ash), Barley (23.46 million tons, 37.5% cellulose, 37.1% hemicellulose, 15.8% lignin, 4.2% ash), and Soybeans (60.28 million tons, 36.4% cellulose, 14.3% hemicellulose, 18.2% lignin, 4.2% ash).
• The cellulose concentration of hemp bast fibers is higher at the center of the stalk than at the top or bottom, while lignin concentration decreases from the bottom to the top of the stalk, and hemicellulose content increases from the bottom to the top, according to Li et al. (2013).
• Sun, Sun, Fowler, and Baird (2005) extracted and characterized original lignin and hemicelluloses from wheat straw.
• Future research on lignocellulosic biomass (LCB) should focus on the total utilization of biomass, including hemicellulose, bio-based silica, and pectin, rather than focusing primarily on cellulose and lignin.
• Figure 2 in the source text provides an illustrative discussion regarding the structure, properties, and applications of cellulose, hemicellulose, lignin, and silica.