Evidence of pre-micellar aggregates in aqueous solution of amphiphilic PDMS–PEO block copolymer

2019 ◽  
Vol 21 (22) ◽  
pp. 11983-11991 ◽  
Author(s):  
Domenico Lombardo ◽  
Gianmarco Munaò ◽  
Pietro Calandra ◽  
Luigi Pasqua ◽  
Maria Teresa Caccamo
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Aggregation Number ◽  
Micellar Aggregates ◽  
Micelle Aggregation Number

The decrease in the PEO chain hydration favours the increase in the PDMS–PEO micelle aggregation number with the increase in temperature.

Studies on the Hydrodynamic Diameter and Aggregation Number of Nonionic Switchable Surfactant

2013 ◽  
Vol 726-731 ◽  
pp. 1638-1642
Author(s):  
Guang Li ◽  
Sen Lin Tian ◽  
Jian Long ◽  
Yan Hua Niu ◽  
Shu Jiao Zhan
Keyword(s):  
Aqueous Solution ◽  
Fluorescence Probe ◽  
Aggregation Number ◽  
Mean Value ◽  
Least Square ◽  
Distribution Data ◽  
Hydrodynamic Diameter ◽  
Steady State Fluorescence ◽  
Micelle Aggregation Number ◽  
The Mean

An Investigation of the micelle aggregation number (N) and hydrodynamic diameter (Dh) is conducted on nonionic switchable surfactant 11-ferrocenylundecyl polyoxyethylene ether (FPEG), the micelle aggregation number of FPEG solution is determined by steady-state fluorescence probe, the results show that the micelle aggregation number (N) increase linearly with the concentration range from 5 to 12 times CMC of FPEG solutions. The critical micelle aggregation number Nmwhich means that the aggregation number of surfactant at the concentration of CMC is calculated to be 66. The hydrodynamic diameter (Dh) of FPEG micelle is determined by dynamic light scattering (DLS), the measurement angle is fixed at 90°and the wavelength is 532nm, the distribution data analyses by NNLS (non-negatively constrained least square) algorithm, the results reveal that the mean value of Dhat the concentration of 0.5 mmolL-1is 7.8nm. the POLY value, which used to explain the micelle polydispersity in the aqueous solution, is measured and the results show that the POLY values are slightly different, this indicates that the micelle aggregation morphology of FPEG is polydispersity in the aqueous solution.

Aggregation Dynamics of the Block Copolymer L64 in Aqueous Solution:  Copolymer−Sodium Dodecyl Sulfate Interactions Studied by Laser T-Jump

Langmuir ◽  
2000 ◽  
Vol 16 (23) ◽  
pp. 9035-9041 ◽  
Author(s):  
Matthias J. Kositza ◽  
Gareth D. Rees ◽  
Arnold Holzwarth ◽  
Josef F. Holzwarth
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Sodium Dodecyl Sulfate ◽  
Sodium Dodecyl ◽  
Dodecyl Sulfate

One-step preparation of polyimide-inlaid amine-rich porous organic block copolymer for efficient removal of chlorophenols from aqueous solution

2019 ◽  
Vol 78 ◽  
pp. 215-229 ◽  
Author(s):  
Yanyang Liu ◽  
Haijian Ou ◽  
Shangqing Li ◽  
Qingliang You ◽  
Huixian Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Efficient Removal ◽  
One Step

Thermo-tunable colorimetric detection of mercury(ii) ions driven by the temperature-dependent assembly and disassembly of a block copolymer

2019 ◽  
Vol 10 (29) ◽  
pp. 4017-4024 ◽  
Author(s):  
Hye-Jin Kim ◽  
Hyung-il Lee
Keyword(s):  
Block Copolymer ◽  
Colorimetric Detection ◽  
Morphological Transition ◽  
Temperature Dependent ◽  
Micellar Aggregates

A thermo-responsive double-hydrophilic block copolymer (DHBC) was synthesized for the thermo-tunable detection of mercury(ii) ions modulated by a temperature-dependent morphological transition between unimers and micellar aggregates.

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