文献类型：期刊文献

中文题名：nan

英文题名：Highly flexible cross-linked cellulose nanofibril sponge-like aerogels with improved mechanical property and enhanced flame retardancy

作者：Guo, Limin[1] Chen, Zhilin[1] Lyu, Shaoyi[1] Fu, Feng[1] Wang, Siqun[1,2]

第一作者：Guo, Limin

通信作者：Chen, ZL[1];Wang, SQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA

年份：2018

卷号：179

起止页码：333-340

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20174104264643);Scopus(收录号：2-s2.0-85030752038);WOS:【SCI-EXPANDED(收录号:WOS:000416367900037)】；

基金：This work was financially supported by the Special Fund for Forest Scientific Research in the Public Welfare (No. 201504603) and Tennessee Experimental Station Project #TEN00510.

语种：英文

外文关键词：Cellulose nanofibril; Aerogel; Cross-linking; Flame retardant; Resilience

摘要：Cellulose nanofibril (CNF) aerogel is highly flammable and its mechanical strength is very soft, which is unfavourable due to safety concerns and impractical when used as the thermal insulation material. In this work, we used N-methylol dimethylphosphonopropionamide (MDPA) and 1,2,3,4-butanetetracarboxylic acid (BTCA) as co-additives and then prepared lightweight flame resistant CNF sponge-like aerogels via an eco-friendly freeze-drying and post cross-linking method. The CNF/BTCA/MDPA aerogel exhibited a better flame retardant performance, outstanding self-extinguishing behaviour and significantly increased char residue (by as much as 268%) compared with the neat CNF aerogel. Meanwhile, the resilience of the aerogel samples improved significantly as the flexibility decreased slightly. Furthermore, the aerogel samples still exhibited excellent thermal insulating properties with thermal conductivity as low as 0.03258 W/(m k). The combination of these characteristics makes the CNF-based aerogel a promising insulation candidate for thermal protective equipment (e.g., fire-protection clothing or advanced spacesuit elements) in the future.