Micellar size, shape and counterion binding of N-(1,1-Dihydroperfluoroalkyl)-N,N,N-trimethylammonium chloride in aqueous solutions

2006 ◽  
Vol 285 (3) ◽  
pp. 323-330 ◽  
Author(s):  
Keisuke Matsuoka ◽  
Aki Yonekawa ◽  
Mariko Ishii ◽  
Chikako Honda ◽  
Kazutoyo Endo ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Trimethylammonium Chloride ◽  
Counterion Binding ◽  
Micellar Size

Phosphate removal from aqueous solutions using (vinylbenzyl)trimethylammonium chloride grafted onto polyester fibers

2015 ◽  
Vol 71 (12) ◽  
pp. 1875-1883 ◽  
Author(s):  
HyunJu Park ◽  
Duc Canh Nguyen ◽  
Choo-Ki Na
Keyword(s):  
Free Energy ◽  
Ion Exchange ◽  
Aqueous Solutions ◽  
Sorption Capacity ◽  
Phosphate Removal ◽  
Trimethylammonium Chloride ◽  
Order Kinetic ◽  
Phosphate Sorption ◽  
Maximum Sorption Capacity ◽  
Competing Anions

In this study, we investigated the removal of phosphate from aqueous solutions using (vinylbenzyl)-trimethylammonium chloride (VBTAC) grafted onto poly(ethylene terephthalate) (PET) fibers (PET-g-VBTAC). Batch-mode experiments were conducted using various contact times, initial phosphate concentrations, temperatures, pH values, and competing anions, to understand phosphate sorption onto PET-g-VBTAC. The phosphate sorption capacity of PET-g-VBTAC increased with increasing solution pH and was highest near pH 7. The equilibrium data fitted the Langmuir isotherm model well. The maximum sorption capacity (qm) of PET-g-VBTAC for phosphate was 55.6–56.0 mg/g at 25–45 °C. The sorption process followed a pseudo-second-order kinetic model. The obtained values of the mean free energy indicated that sorption of phosphate on PET-g-VBTAC occurs via ion exchange. Thermodynamic parameters, enthalpy change, entropy change, and Gibb's free energy, confirmed that phosphate sorption was spontaneous and endothermic. The adverse effects of competing anions on phosphate removal by PET-g-VBTAC were insignificant. These results demonstrate that PET-g-VBTAC effectively removes phosphate from aqueous solutions by ion exchange.

An Influence of the Spatial Arrangement, Length of the Alkyl Chain and Temperature on Micellar Properties of N-Alkyl-N-{[2-(benzyloxy)cyclohexylmethyl]}-N,N-dimethylammonium Bromides in Aqueous Solutions

1997 ◽  
Vol 62 (12) ◽  
pp. 1853-1862 ◽  
Author(s):  
Jarmila Oremusová ◽  
Veronika Mislovičová
Keyword(s):  
Aqueous Solutions ◽  
Alkyl Chain ◽  
Spatial Arrangement ◽  
Critical Micellar Concentration ◽  
Small Decrease ◽  
Counterion Binding ◽  
Micellar Properties ◽  
Fold Reduction ◽  
Increasing Temperature ◽  
Methylene Group

In this work we study influence of the length of the alkyl chain and temperature on critical micellar concentration (CMC) for cis and trans diastereoisomers of the N-alkyl-N-{[2-(benzyloxy)cyclohexylmethyl]}-N,N-dimethylammonium bromides in aqueous solutions using conductometric and spectrophotometric techniques. From the measured dependences, the degree of the counterion binding (β) and thermodynamic parameters of micellization (∆Gm0, ∆Hm0, ∆Sm0) were calculated and compared with the literature data on similar compounds. The results show that lengthening of the alkyl chain by one methylene group causes approximately a two-fold reduction in CMC. The β values decrease with temperature and with increasing length of the alkyl chain. While only a small decrease in the ∆Gm0 values (ca 1 kJ mol-1) due to increasing temperature was found, the decrease in ∆Hm0 is much more pronounced.

Physicochemical Properties of Micelles of Poly(styrene-b-[3-(methacryloylamino)propyl]trimethylammonium chloride-b-ethylene oxide) in Aqueous Solutions

Langmuir ◽  
2009 ◽  
Vol 25 (2) ◽  
pp. 739-743 ◽  
Author(s):  
Jingjing Liu ◽  
Dian Liu ◽  
Yuuichi Yokoyama ◽  
Shin-ichi Yusa ◽  
Kenichi Nakashima
Keyword(s):  
Ethylene Oxide ◽  
Physicochemical Properties ◽  
Aqueous Solutions ◽  
Trimethylammonium Chloride
Sign in / Sign up

Export Citation Format

Share Document