Wood-inspired strategy to toughen transparent cellulose nanofibril films

编号 020029303

推送时间 20210531

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Wood-inspired strategy to toughen transparent cellulose nanofibril films

来源期刊 Carbohydrate Polymers

期 第293期

发表时间 20210210

关键词 Cellulose nanofibril film;  Wood-inspired strategy;  Lignosulfonic acid;  Toughness;  Transparency; 

摘要 The simultaneous attainment of high strength and high toughness of transparent cellulose nanofibril (CNF) film can expedite its uses in advanced applications. In this work, a wood-inspired strategy is proposed to address the conflict between strength and toughness by using natural derived lignosulfonic acid (LA) as a reinforcing?additive. Only 1 wt% LA addition can double the toughness (11.0 +/- 1.3 MJ/m(3)) of pure CNF film. Consequently, the as-prepared CNF/LA-1 nanocomposite film not only exhibits superior?mechanical properties?(23.6 +/- 1.3 MJ/m(3) toughness, 249 +/- 6 MPa strength, and 15.4 +/- 1.4 % strain), but also maintains an excellent optical transparency of 91.2 % (550 nm). Furthermore, the mechanism for simultaneously enhancing strength and toughness is essentially attributed to the improved hydrogen bonding between CNF-OH and LA-SO3H and effective energy dissipation system. This work provides a green and effective approach to prepare strong yet tough and transparent biodegradable CNF film for high-end applications.

服务人员 尚玮姣

服务院士 宋湛谦

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