AMMONIUM LAURATE
AMMONIUM LAURATE
CAS: 2437-23-2
Molecular Formula: C12H27NO2
AMMONIUM LAURATE - Names and Identifiers
AMMONIUM LAURATE - Physico-chemical Properties
| Molecular Formula | C12H27NO2 |
| Molar Mass | 217.35 |
AMMONIUM LAURATE - Ammonium Laurate Surfactant for Cleaner Deposition of Carbon Nanotubes
Author:
HM Nilsson, B Meany,J Ticey,CF Sun,YH Wang,J Cumings
Abstract:
Experiments probing the properties of individual carbon nanotubes (CNTs) and those measuring bulk composites show vastly different results. One major issue limiting the results is that the procedures required to separate and test CNTs introduce contamination that changes the properties of the CNT. These contamination residues often come from the resist used in lithographic processing and the surfactant used to suspend and deposit the CNTs, commonly sodium dodecyl sulfate (SDS). Here we present ammonium laurate (AL), a surfactant that has previously not been used for this application, which differs from SDS only by substitution of ionic constituents but shows vastly cleaner depositions. In addition, we show that compared SDS, AL-suspended CNTs have greater shelf stability and more selective dispersion. These results are verified using transmission electron microscopy, atomic force microscopy, ζ-potential measurements, and Raman and absorption optical spectroscopy. This surfactant is simple to prepare, and the nanotube solutions require minimal sonication and centrifugation in order outperform SDS.
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Key words:
DOI:
10.1021/acs.langmuir.5b01175
cited:
year:
2015
Last Update：2024-01-02 23:10:35
AMMONIUM LAURATE - Effective length of the alkyl chain and thermal behaviors of Langmuir-Blodgett films of octadecylammonium laurate, octadecylammonium octadecanoate and octadecylammonium tetracosanoate
from osevier
Author:
Abstract:
Thermal behaviors of 11-layer Langmuir-Blodgett (LB) films of the double long-chain compounds of octadecylammonium laurate (ODALA), octadecylammonium octadecanoate (ODASA) and octadecylammonium tetracosanoate (ODATA) have been investigated by Fourier transform infrared spectroscopy. The temperature-dependent infrared spectra show that thermal stability of the three kinds of LB films depends upon the length of the hydrocarbon chain. The LB film of ODALA undergoes an order-disorder transition in the temperature range 50-65 °C. In contrast, the ODATA LB film has the phase transition temperature range of 80-90 °C. Of particular interest is that both ODASA and ODATA LB films have nearly the same phase transition temperature range of 80-90 °C, indicating that the replacement between tetracosanoic acid and stearic acid has little effect on the thermal stability of the two compounds. The above observations suggest that the effective length of the alkyl chains, which is determined by the component with a shorter chain in the double long-chain compounds has a dominant influence on the thermal stability. It is very likely that the whole chain of the shorter chain component such as octadecylamine in ODATA has contribution to the thermal stability while only the effective length of the longer alkyl chain component gives a significant effect.
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Key words:
Infrared spectroscopy Thermal behavior Octadecylammonium laurate Octadecylammonium octadecanoate Octadecylammonium tetracosanoate
DOI:
10.1016/j.vibspec.2009.02.001
cited:
year:
2009
Last Update：2023-08-16 22:05:47
AMMONIUM LAURATE - Enhancing Dispersion of Silica Nanoparticles with Ammonium Laurate Surfactant for Natural Rubber Latex Composites
from Research Gate
Author:
W Seangyen,P Prapainainar,P Sae-Oui,S Loykulnant,P Dittanet
Abstract:
In-situ silica nanoparticles with ammonium laurate surfactant in natural rubber latex composites were characterized to describe the reinforcement mechanism in enhanced mechanical properties. In-situ sol-gel method was introduced to generate silica nanoparticles in natural rubber latex using a mole ratio of water-to-TEOS of 28.9 stirring at room temperature 24 hours. The addition and effect of adding ammonium laurate surfactant for enhancing dispersion and compatibility between silica nanoparticles and rubber matrix was also studied. The natural rubber latex was then vulcanized by electron beam radiation at 200 kGy. The silica content in rubber composites made in-situ, was analyzed by TGA, showed an increase from 3.08 phr to 8.92 phr, corresponding to addition of TEOS amounts of 10 phr to 30 phr, respectively. The dispersion of silica nanoparticles in rubber matrix with ammonium laurate surfactant was improved and exhibited less aggregation than rubber composites absent of ammonium laurate surfactant as evidenced by SEM-EDX. The increase of silica content in rubber composites exhibited lower swelling ratio and higher crosslink density when compared with neat natural rubber. Also, the modulus at 100% and 300% strain also increased with increasing silica nanoparticles incorporation in contrast to tensile strength.
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Key words:
TEOS Surfactant Sol-Gel Method In Situ Silica&tn=SE_baiduxueshu_c1gjeupa&ie=utf-8" target="_blank">In Situ Silica Natural Rubber Composites
DOI:
10.4028/www.scientific.net/KEM.821.74
year:
2019
Last Update：2023-08-16 22:05:47
AMMONIUM LAURATE - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-09 02:00:04
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