材料科学
纤维素
纳米材料
化学工程
纤维素乙醇
多孔性
热解
发泡剂
纳米颗粒
复合材料
纳米技术
聚氨酯
工程类
作者
Md. Musfiqur Rahman,Islam Hafez,Mehdi Tajvidi,Aria Amirbahman
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2023-08-30
卷期号:11 (36): 13240-13250
标识
DOI:10.1021/acssuschemeng.3c00599
摘要
Cellulose nanofibril (CNF) porous structures (foams/aerogels) are typically produced using energy-intensive processes such as freeze drying. In this study, a novel microwave-assisted thawing process was developed to produce low-density (36 kg/m3) CNF foams. The process involved the freezing of CNF and urea suspension followed by immediate thawing in the microwave. A slow freezing rate produced a uniform pore structure, whereas fast freezing using liquid nitrogen resulted in the aggregation of CNF upon thawing. The in-situ carbamate crosslinking resulted from the addition of urea provided wet stability and was confirmed by FTIR and nitrogen content analysis. The compressive properties of the foams were evaluated in both dry and wet conditions. In addition, iron oxide nanoparticles were used to assess the feasibility of producing hybrid foams via this novel method. This innovative and energy-efficient approach to produce foams from cellulosic nanomaterials has the potential to be scaled up and is expected to promote the use of renewable nanomaterials in a wider range of applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI