Aerocellulose from cellulose–ionic liquid solutions: Preparation, properties and comparison with cellulose–NaOH and cellulose–NMMO routes

Super water absorbing and shape memory nanocellulose aerogels from TEMPO-oxidized cellulose nanofibrils via cyclic freezing–thawing

“…Cellulose aerogels can be fabricated from either homogeneous cellulose solutions [18][19][20][21][22][23][24][25] or heterogeneous aqueous nanocellulose suspensions. 4,7,11,13,[26][27][28][29][30][31][32][33][34] Aerogels prepared from cellulose solutions require lengthy, multiple steps of dissolving cellulose in solvents, such as alkali hydroxide/urea solution, 18 calcium thiocyanate tetrahydrate, 19 N-methyl-morpholine-N-oxide, 20,21 sodium hydroxide, 22 lithium chloride/dimethylacetamine, 23 lithium chloride/dimethyl sulfoxide 24 and ionic liquid, 25 followed by induced gelation, solvent exchange and supercritical or freeze drying.…”

“…4,7,11,13,[26][27][28][29][30][31][32][33][34] Aerogels prepared from cellulose solutions require lengthy, multiple steps of dissolving cellulose in solvents, such as alkali hydroxide/urea solution, 18 calcium thiocyanate tetrahydrate, 19 N-methyl-morpholine-N-oxide, 20,21 sodium hydroxide, 22 lithium chloride/dimethylacetamine, 23 lithium chloride/dimethyl sulfoxide 24 and ionic liquid, 25 followed by induced gelation, solvent exchange and supercritical or freeze drying. Aerogels from dissolved cellulose had a specic surface area as high as 404 m 2 g À1 , 17 less than half of that of the typical silica aerogels (over 1000 m 2 g À1 ), 35 and densities ranging from 20-200 mg cm À3 , 19,20,22 one to two orders of magnitude higher than those of the silica aerogel (2-3 mg cm À3 ).…”

Bilayer-Structured Regenerated Cellulose/Chitosan Films Prepared with Ionic Liquid

“…Alternatively, ionic liquids have been used as environmentally benign solvents for cellulose dissolution due to their excellent properties such as good chemical and thermal stability, low flammability, low melting point and ease of recycling [10][11]. Currently, a limited number of solvent systems for cellulose have been reported [12][13][14], and the LiCl/N,N-dimethylacetamide (DMAc) system has become very popular due to its advantageous associated with direct dissolution of the cellulose which are being faster, easier and more reproducible [15]. To date, LiCl/DMAc solvent system has also been used as mobile phase in size-exclusion chromatography (SEC) with the column packings such as poly(styrene-divinyl benzene).…”

Cellulose aerogels decorated with multi-walled carbon nanotubes: preparation, characterization, and application for electromagnetic interference shielding

“…Cellulose aerogels consist of micro/nano-scale threedimensional networks, and have a great variety of extraordinary features, such as ultra-low density, large specific surface, high porosity, and superb thermal, sound and electrical insulation characteristics [1,2] , which are currently considered one of the most promising biomaterials in the field of plant products. Also, it is believed that their intertangled fibril networks and ample surface hydroxyl groups contribute to tightly immobilizing nanoparticles and effectively reducing agglomeration.…”