The preparation of lignocellulosic aerogels from ionic liquid solutions

被引:156
作者
Aaltonen, Olli [1 ]
Jauhiainen, Olli [1 ]
机构
[1] VTT Proc Chem, Espoo 02044, Finland
关键词
Aerogels; Cellulose; Lignocellulose; Lignin; Xylan; Critical point drying; Supercritical; Carbon dioxide; Ionic liquids; NANOFIBRILLAR CELLULOSE AEROGELS; DISSOLUTION;
D O I
10.1016/j.carbpol.2008.07.008
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Nanofibrillar aerogels were prepared from cellulose, spruce wood and from mixtures of cellulose, lignin and xylan. The lignocellulosic polymers were first dissolved in an ionic liquid and coagulated from solution by adding aqueous ethanol. The obtained gel was washed with ethanol and liquid carbon dioxide and finally dried by releasing the carbon dioxide from the porous structure at supercritical temperature to obtain the aerogel. The bulk densities of the biopolymer aerogels ranged from 25 to 114 g/l and the internal surface areas (BET) from 108 to 539 m(2)/g depending on the biopolymer mix and on the polymer concentration in the ionic liquid solution. All aerogels were compressible and consisted of nanofibrillar biomaterial network with open-pore structure. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:125 / 129
页数:5
相关论文
共 15 条
[1]  
AALTONEN O, 1977, PAPERI JA PUU, V11, P739
[2]  
BARRET EP, 1951, J AM CHEM SOC, V73, P380
[3]  
BRUNAUER S, 1938, J AM CHEM SOC, V60, P310
[4]  
GRAENACHER C, 1937, Patent No. 1943176
[5]   Synthesis and characterisation of nanofibrillar cellulose aerogels [J].
Hoepfner, Sandra ;
Ratke, Lorenz ;
Milow, Barbara .
CELLULOSE, 2008, 15 (01) :121-129
[6]  
HUSEMANN E, 1969, MAKROMOLEKUL CHEM, V128, P288
[7]   Aerocellulose: Aerogels and aerogel-like materials made from cellulose [J].
Innerlohinger, Josef ;
Weber, Hedda K. ;
Kraft, Gregor .
MACROMOLECULAR SYMPOSIA, 2006, 244 :126-135
[8]   Nanofibrillar cellulose aerogels [J].
Jin, H ;
Nishiyama, Y ;
Wada, M ;
Kuga, S .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2004, 240 (1-3) :63-67
[9]  
KADOKAWA J, 2007, 234 ACS NAT M BOST M, P19
[10]   Dissolution of wood in ionic liquids [J].
Kilpelainen, Ilkka ;
Xie, Haibo ;
King, Alistair ;
Granstrom, Mari ;
Heikkinen, Sami ;
Argyropoulos, Dimitris S. .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2007, 55 (22) :9142-9148