Steartrimonium chloride

Catalog Number

ACM112038-1

CAS

112-03-8

Structure

IUPAC Name

Trimethyl(octadecyl)azanium;chloride

Synonyms

Stearyl trimethyl ammonium chloride;N,N,N-Trimethyl-1-octadecanaminium chloride;1-Octadecanaminium, N,N,N-trimethyl-, chloride;Monostearyl trimethyl ammonium chloride;Trimethyloctadecylammonium chloride;Quaternium-10;STAC

Molecular Weight

348.05

Molecular Formula

C21H46ClN

Canonical SMILES

CCCCCCCCCCCCCCCCCC[N+](C)(C)C.[Cl-]

InChI

VBIIFPGSPJYLRR-UHFFFAOYSA-M

InChI Key

InChI=1S/C21H46N.ClH/c1-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22(2,3)4;/h5-21H2,1-4H3;1H/q+1;/p-1

Active Content

95%

5.5-8.5

Physical State

Solid/Paste

Typical Applications

Emulsifying agent

MSDS

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COA

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Spec Sheet

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Case Study

Trimethyloctadecylammonium Chloride Used as Electrolyte Additive to Enhance Cycle Life and Electrode Stability in SLRFBs

Trimethyloctadecylammonium Chloride Used as Electrolyte Additive to Enhance Cycle Life and Electrode Stability in SLRFBs Jaiswal, Nandini, Harun Khan, and Kothandaraman Ramanujam. Journal of Energy Storage 54 (2022): 105243.

Trimethyloctadecylammonium chloride (TMOAC) has been investigated as a performance-enhancing additive in soluble lead redox flow batteries (SLRFBs), a promising energy storage technology hindered by poor cycle life and dendrite formation. In this study, TMOAC was introduced alongside NaF/LiF into the electrolyte to simultaneously benefit both anodic and cathodic processes.
Experimental characterization revealed that TMOAC significantly influences the morphology and deposition behavior of lead and lead dioxide during cycling. Cyclic voltammetry demonstrated that TMOAC adsorbs on the electrode surface, modulating the deposition of Pb metal and improving the redox kinetics of the Pb²⁺/PbO₂ couple. XRD analysis indicated a favorable shift toward β-PbO₂ as the predominant phase, suggesting improved crystallinity and particle uniformity. SEM imaging further confirmed that TMOAC leads to compact, dendrite-free electrodeposits, critical for extending battery life.
When cycled at 20 mA cm⁻², SLRFB cells with TMOAC and NaF additives maintained stable performance for over 500 cycles, with average Coulombic, voltage, and energy efficiencies of 94%, 78%, and 74%, respectively-compared to only 45 cycles for the additive-free system. Even under high current density (50 mA cm⁻²), the modified system exhibited a specific capacity of 50 mAh cm⁻² with robust cycling stability.
These findings establish TMOAC as a valuable electrolyte additive for improving the longevity and efficiency of SLRFBs, with potential applicability in commercial-scale energy storage systems.

Trimethyloctadecylammonium Chloride Enables Stable SWCNT Dispersion for Co-electrodeposition of High-Strength Cu/SWCNT Composites

Trimethyloctadecylammonium Chloride Enables Stable SWCNT Dispersion for Co-electrodeposition of High-Strength Cu/SWCNT Composites Shimizu, Masahiro, et al. Materials Letters 261 (2020): 126993.

Trimethyloctadecylammonium chloride (STAC), a cationic surfactant, plays a critical role in the co-electrodeposition of copper/single-walled carbon nanotube (Cu/SWCNT) composites for advanced electronic applications. This study demonstrates the use of STAC to disperse and immobilize SWCNTs (~1.8 nm diameter, ~10 μm length) in aqueous media for uniform incorporation into an electroplated copper matrix.
Prior to dispersion, residual Fe catalysts from SWCNT synthesis were removed using dilute HCl. A 0.1 g L⁻¹ SWCNT suspension was prepared with 0.3 mM STAC, followed by atomization via a wet-jet milling process (up to 100 passes) to disaggregate bundled nanotubes. Particle size distribution was monitored with laser diffraction (SHIMADZU SALD-7000), and SWCNT morphology confirmed by TEM (JEOL JEM-2100F).
The resulting SWCNT suspension was introduced into a CuSO₄-H₂SO₄ electroplating bath (0.85 M CuSO₄, 0.55 M H₂SO₄, no brightener). After 15 min of ultrasonic mixing, co-deposition proceeded at room temperature under a constant current density of 20 mA cm⁻² for 22.5 min, producing a 2 μm-thick Cu/SWCNT layer.
The inclusion of STAC enabled successful SWCNT immobilization without crystallinity loss, confirmed by Raman spectroscopy. The resulting Cu/SWCNT foil exhibited superior mechanical strength (519 MPa) and fracture resistance. These results highlight STAC's efficacy in facilitating nanomaterial dispersion and integration into metal matrices via electroplating.

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