1-Allyl-3-methylimidazolium chloride

Catalog NumberACFR65039103

CAS Number65039-10-3

CategoryMain Flame-Retardant ILs

Description	Ionic liquids ([AMIM]Cl) can be used for surface flame-retardant modification of fabrics and the development of flame-retardant cellulose aerogels.
Synonyms	[AMIM]Cl
Molecular Weight	158.63
Molecular Formula	C7H11ClN2
SMILES	[Cl-].C[n+]1ccn(CC=C)c1
InChI	1S/C7H11N2.ClH/c1-3-4-9-6-5-8(2)7-9;/h3,5-7H,1,4H2,2H3;1H/q+1;/p-1
InChI Key	QVRCRKLLQYOIKY-UHFFFAOYSA-M
Purity	≥97.0% (HPLC)
Appearance	crystals
MDL Number	MFCD07784450
Size	5g/50g
Storage Temperature	-20°C

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Case Study

1-Allyl-3-methylimidazolium Chloride as a Solvent for Transparent Flame-Retardant Cellulose-Silica Composite Aerogels

Yuan, Bin, et al. ACS Sustainable Chemistry & Engineering 5.11 (2017): 11117-11123.

1-Allyl-3-methylimidazolium chloride ([AMIM]Cl) acts as an efficient, recoverable solvent for dissolving cellulose, enabling the fabrication of transparent cellulose-silica composite aerogels with excellent flame retardancy and enhanced mechanical properties.
Fabrication Process: Cotton pulp (2 wt%) was dissolved in [AMIM]Cl at 80 °C to form a clear solution. The solution was cast and regenerated in a 60 wt% aqueous [AMIM]Cl bath to obtain transparent cellulose hydrogels. After solvent exchange to ethanol, the alcogels were immersed in tetraethoxysilane (TEOS) solutions with varying concentrations. Silica was formed in situ via a two-step sol-gel process (acidic hydrolysis, then basic condensation). The gels were dried by supercritical CO2 to obtain aerogels.
Performance Evaluation: The [AMIM]Cl-derived cellulose-silica aerogels (silica content up to 59 wt%) showed high transparency (78.4% at 800 nm for 33.6 wt% silica), increased compressive strength, and improved mesoporosity (BET surface area up to 438 m²/g). Thermogravimetric analysis and microscale combustion calorimetry revealed that silica nanoparticles acted as a solid barrier, delaying cellulose decomposition and reducing peak heat release rate from 361 W/g (neat cellulose aerogel) to 56 W/g. Aerogels with ≥33.6 wt% silica became self-extinguishing after ignition.
Application Significance: [AMIM]Cl enables the production of high-performance, flame-retardant cellulose composite aerogels for lightweight thermal insulation and green packaging.

1-Allyl-3-methylimidazolium Chloride as a Green Solvent for Transparent Flame-Retardant Cellulose/Aluminum Hydroxide Nanocomposite Aerogels

Yuan, Bin, et al. Science China Chemistry 59.10 (2016): 1335-1341.

1-Allyl-3-methylimidazolium chloride ([AMIM]Cl) acts as an effective, recoverable solvent for dissolving cellulose, enabling the in-situ synthesis of aluminum hydroxide (AH) nanoparticles within cellulose gels to produce transparent, flame-retardant nanocomposite aerogels.
Fabrication Process: Cotton pulp (2 wt%) was dissolved in [AMIM]Cl at 80 °C. The solution was cast and coagulated in 60 wt% aqueous [AMIM]Cl to obtain transparent cellulose gels. The gels were immersed in an AlCl3·6H2O/propylene oxide solution to induce hydrolysis and condensation, forming AH nanoparticles in-situ. After solvent exchange with ethanol, the gels were dried by supercritical CO2 to obtain aerogels with AH contents of 55.8 wt% and 66.6 wt%.
Performance Evaluation: The nanocomposite aerogels retained a homogeneous nanoporous structure (SEM, TEM). Light transmittance at 800 nm remained high (67.3% for 55.8 wt% AH). Compressive stress at 50% strain increased from 1.66 MPa (neat cellulose aerogel) to 2.14 MPa. Thermogravimetric analysis and microscale combustion calorimetry showed that AH decomposition released water vapor, reducing peak heat release rate from 294 W/g to 51 W/g and enabling self-extinguishing behavior after ignition.
Application Significance: [AMIM]Cl enables the preparation of transparent, mechanically robust, and flame-retardant cellulose aerogels for green building materials.

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