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INTERDROPLET EXCHANGE-RATES OF WATER-IN-OIL AND OIL-IN-WATER MICROEMULSION DROPLETS STABILIZED BY C12E5
被引:85
作者
:
CLARK, S
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
CLARK, S
[
1
]
FLETCHER, PDI
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
FLETCHER, PDI
[
1
]
YE, XL
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
YE, XL
[
1
]
机构
:
[1]
UNIV HULL,SCH CHEM,HULL HU6 7RX,N HUMBERSIDE,ENGLAND
来源
:
LANGMUIR
|
1990年
/ 6卷
/ 07期
关键词
:
D O I
:
10.1021/la00097a019
中图分类号
:
O6 [化学];
学科分类号
:
0703 ;
摘要
:
We have used a time-resolved fluorescence method to investigate the structure and dynamics of water-in-oil (W/O) and oil-in-water (O/W) microemulsions stabilized by the nonionic surfactant C12E5. The measured aggregation numbers are consistent with the formation of spherical droplets with a low degree of polydispersity. The droplet sizes are in agreement with light-scattering values determined for systems close to the solubilization phase boundaries and at low droplet concentrations. The results of the present study also show the droplet sizes are reasonably constant throughout the temperature range over which the one-phase microemulsion is stable. Droplet sizes are independent of droplet concentration. The intradroplet fluorescence-quenching rates indicate that the fluorescor and quencher probe molecules experience apparent microviscosities within the microemulsion droplets which are 10-100-fold larger than the viscosities of the corresponding bulk oils or water. Exchange of the probe molecules between the droplets occurs on the experimental time scale of a few microseconds for some systems. This exchange is thought to occur via a mechanism of droplet coalescence and reseparation. For both O/W and W/O microemulsions, the rate of this process is slowest at the solubilization phase boundary where the microemulsion phase coexists with an excess phase of the dispersed component. The dynamics of the droplet coalescence process are discussed in terms of the interdroplet interactions and the energies required to bend the surfactant monolayer and to desorb surfactant from the oil-water interface. © 1990, American Chemical Society. All rights reserved.
引用
收藏
页码:1301 / 1309
页数:9
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共 43 条
[41]
TEMPERATURE-DEPENDENCE OF PHOTOPHYSICAL AND PHOTOCHEMICAL PROPERTIES OF TRIS(2,2'-BIPYRIDYL)RUTHENIUM(II) ION IN AQUEOUS-SOLUTION
VANHOUTEN, J
论文数:
0
引用数:
0
h-index:
0
机构:
UNIV CALIF SANTA BARBARA, DEPT CHEM, SANTA BARBARA, CA 93106 USA
UNIV CALIF SANTA BARBARA, DEPT CHEM, SANTA BARBARA, CA 93106 USA
VANHOUTEN, J
WATTS, RJ
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机构:
UNIV CALIF SANTA BARBARA, DEPT CHEM, SANTA BARBARA, CA 93106 USA
UNIV CALIF SANTA BARBARA, DEPT CHEM, SANTA BARBARA, CA 93106 USA
WATTS, RJ
[J].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,
1976,
98
(16)
: 4853
-
4858
[42]
FLUORESCENCE QUENCHING IN INVERSE MICELLAR SYSTEMS - POSSIBILITIES AND LIMITATIONS
VERBEECK, A
论文数:
0
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0
h-index:
0
机构:
CATHOLIC UNIV LEUVEN,DEPT CHEM,CELESTIJNENLAAN 200 F,B-3030 HEVERLE,BELGIUM
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CATHOLIC UNIV LEUVEN,DEPT CHEM,CELESTIJNENLAAN 200 F,B-3030 HEVERLE,BELGIUM
CATHOLIC UNIV LEUVEN,DEPT CHEM,CELESTIJNENLAAN 200 F,B-3030 HEVERLE,BELGIUM
DESCHRYVER, FC
[J].
LANGMUIR,
1987,
3
(04)
: 494
-
500
[43]
DETERMINATION OF MICELLE SIZE AND POLYDISPERSITY BY FLUORESCENCE QUENCHING - THEORY AND NUMERICAL RESULTS
WARR, GG
论文数:
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UNIV MELBOURNE,DEPT PHYS CHEM,PARKVILLE,VIC 3052,AUSTRALIA
UNIV MELBOURNE,DEPT PHYS CHEM,PARKVILLE,VIC 3052,AUSTRALIA
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论文数:
引用数:
h-index:
机构:
GRIESER, F
[J].
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I,
1986,
82
: 1813
-
1828
←
1
2
3
4
5
→