Dual-enhancement effect of electrostatic adsorption and chemical crosslinking for nanocellulose-based aerogels

编号 020021804

推送时间 20191223

研究领域 林产化工 

年份 2019 

类型 期刊 

语种 英语

标题 Dual-enhancement effect of electrostatic adsorption and chemical crosslinking for nanocellulose-based aerogels

来源期刊 Industrial Crops and Products

期 第218期

发表时间 20190725

关键词 Nanocellulose;  Aerogels;  Electrostatic adsorption;  Chemical crosslinking; 

摘要 Nanocelluloses including rigid cellulose nanocrystals (CNC) and semi-flexible cellulose nanofibrils (CNF) have recently gained much attention as the high-added nanomaterials from renewable resources. These nanoparticles with high aspect ratio are widely used as reinforcing agents in composites and porous materials. In this study, a dual-enhancement strategy based on the electrostatic adsorption and chemical crosslinking was proposed to improve the mechanical properties of composite aerogels based on the combination of TEMPO-oxidized CNF and cationic CNC aided with sodium alginate (SA) and crosslinked by three isocyanate reagents. The resultant aerogels are ultralight (< 0.06?g/cm3), highly porous (> 96%) and hydrophobic materials (water contact angle > 100°), with the simultaneous increase of compression modulus, compression strength and compression energy by three orders of magnitude. The dual-enhancement strategy developed in here presents a novel approach to design the nanocellulose-based porous materials with remarkable enhancement of mechanical properties and potential applications in diverse functional materials.

服务人员 尚玮姣

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