2009
DOI: 10.1590/s0103-97332009000200012
|View full text |Cite
|
Sign up to set email alerts
|

Abstract: Model self-assembled networks of telechelic polymer C 18 − PEO(35k) − C 18 in water have been studied. The rheology of such transient networks has been investigated as a function of polymer concentration, and a typical percolation law has been observed. The network structure has been characterised by Small Angle Neutron Scattering in D 2 O, where the interactions between micelles formed by the hydrophobic C 18 -stickers of the polymer give rise to a peak in the scattered intensity. These model networks have th… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

1
4
0

Year Published

2010
2010
2017
2017

Publication Types

Select...
3

Relationship

2
1

Authors

Journals

citations
Cited by 3 publications
(5 citation statements)
references
References 38 publications
1
4
0
Order By: Relevance
“…The behaviour of the pure microemulsion gels is almost perfectly Maxwellian. Upon dispersion of silica nanoparticles, however, deviations occur, as already noted in our previous articles [26,39]. In Figure 7, a fit of G' and G" with a double Maxwell model, with two moduli and two relaxation times, is shown to yield a satisfying result for the microemulsion gel (system A, Φ m =0.04, r=10, Φ si =5.7%v), and the same has been observed for system B as shown in the ESI.…”
Section: Without Silica With Silica (654%v) Systemsupporting
confidence: 65%
See 2 more Smart Citations
“…The behaviour of the pure microemulsion gels is almost perfectly Maxwellian. Upon dispersion of silica nanoparticles, however, deviations occur, as already noted in our previous articles [26,39]. In Figure 7, a fit of G' and G" with a double Maxwell model, with two moduli and two relaxation times, is shown to yield a satisfying result for the microemulsion gel (system A, Φ m =0.04, r=10, Φ si =5.7%v), and the same has been observed for system B as shown in the ESI.…”
Section: Without Silica With Silica (654%v) Systemsupporting
confidence: 65%
“…In this context, it is interesting to point out that the relaxation time of a surfactant-free system made with telechelic copolymer with a longer hydrophilic chain (PEO 35k) was found to increase with silica volume fraction, proportionally to (1+Φ si ) [39]. In this case, steric hindrance due to the excluded volume of the silica may prevent the sticker from exploring other droplets, and thus increase the relaxation time.…”
Section: Modelling the Reinforcement Factormentioning
confidence: 98%
See 1 more Smart Citation
“…There are several examples of water-based physical gels in which inorganic particles are introduced within an existing physical network, leading to “composite” or “hybrid” gels. The inorganic particles, often clay or silica, then act as additional physical cross-linking points in the network, resulting in higher values for the elastic modulus. Special cases are the “shake gels”, which show gelation upon shearing. , There are, however, very few reports on physical gels in which inorganic nanoparticles are the only nodes in the transient network. Petit and co-workers have prepared hybrid gels of graft copolymers mixed with silica particles, in which the grafts physically adsorb onto the silica particle surface .…”
Section: Introductionmentioning
confidence: 99%
“…Indeed, the incorporation of nanoparticles, in particular silica, into hydrophobic polymer matrices is a popular method to improve the rheological properties of polymer materials, be it model systems [128,129,130,131], or more complex multi-scale filler materials for industrial applications [132,133,134]. The structure and rheological properties of hydrogel nanocomposites has been studied by Puech et al [135,136,137]. Besides standard rheology characterizing the network percolation and its shift in the phase diagram with addition of nanoparticles, they have used small-angle neutron scattering with H 2 O/D 2 O contrast-variation in order to characterize either the organic network, or the silica filler and its interactions, using a reverse Monte Carlo approach [138].…”
Section: Bulk Structure and Bending Elasticity Of Microemulsionsmentioning
confidence: 99%