A tribute to Isabelle Grillo

Session

Poster Session and Wine&cheese

18 May 2022, 18:30

ILL4/rdc-1 - Amphi Chadwick (ILL4)

83. Bulk properties of aqueous graphene oxide and reduced graphene oxide with surfactants and polymers: adsorption and stability

Thomas McCoy (University of Cambridge)

Poster

A diverse range of molecular surfactants and polymers have been incorporated into aqueous graphene oxide (GO) and reduced graphene oxide (rGO) dispersions in order to understand the complex relationship between surface chemistry, surface forces and interfacial thermodynamics of these materials with typical amphiphiles. Surfactant additives were systematically varied in terms of their charge...

94. Characterization of ionic liquid films in mesoporous SBA-15 by small-angle X-ray scattering

Mrs Nadine Schnabel (Institute of Physical Chemistry, University of Stuttgart)

Poster

The immobilization of molecular catalysts in confined geometries of mesoporous support materials has been shown to selectively control the catalytic performance. An additional increase in yield and selectivity of catalytic reactions are expected by combining the spatial confinement of the pores with that of a thin ionic liquid film at the pore surface. Small angle X-ray scattering (SAXS) can...

95. Efficiency Boosting of Surfactants in Microemulsions with Novel Amphiphilic Poly(ethylene oxide)-poly(alkyl glycidyl ether) Polymers

Mr Maximilian Krappel (Institute of Physical Chemistry, University of Stuttgart)

Poster

By adding small amounts of amphiphilic diblock copolymers like poly(ethylene oxide)-co-poly(ethylene propylene) (PEO-PEP) to water – oil – non-ionic surfactant systems, Jakobs et al. showed that the efficiency of medium-chain surfactants to solubilize equal amounts of water and oil can be strongly increased (so-called efficiency boosting) [1]. In order to obtain a similar boosting while...

98. How a hydroxyl group on hydrophobic chain can change surfactant self-assembly?

Maëva Almeida (Université Paris Est Créteil, CNRS, ICMPE / Laboratoire Léon Brillouin, CEA Saclay )

Poster

With global warming, green chemistry has experienced a great development. In this context, fatty acids are surfactants of particular interest since they can be extracted from agricultural resources. The use of an organic counter-ion enables their solubilization in aqueous solution at room temperature where they self-assemble into different supramolecular structures.
Stearic Acid (SA), one of...

80. Limoncello and the art of mixing water and oil

Leonardo Chiappisi

Poster

Whoever tried to prepare homemade mayonnaise, knows how much energy input the formation of water/oil emulsions require. In addition to that, in order to provide stability to the emulsion, the presence of components which stabilize the system are required. This role is played by some of proteins and the lecithin contained in the egg yolk, for the case of mayonnaise. In most of other emulsions,...

92. Mesoporous foams and ZnO inverse opals obtained from polystyrene nanoparticles with adjustable size and polydispersity

Karina Abitaev (University of Stuttgart)

Poster

Using polymer particles templates to prepare porous materials is not only a cost-efficient strategy but offers the possibility of pore size and morphology control by the particle size and polydispersity. In this study, we investigated the influence of the sodium dodecyl sulfate (SDS) concentration utilized in the emulsion polymerization of styrene on both the properties of the obtained...

89. Microflow-induced Structural Changes of Bicontinuous Microemulsions Studied by SANS

Julian FISCHER (Universität Stuttgart)

Poster

Understanding and engineering the flow-response of complex fluids made by surfactant membranes is a key challenge for their practical utilization. Nevertheless, the predicted sponge-to-lamellar transition of self-assembled surfactant membranes upon shear flow [1] has, to our knowledge, only been shown for surfactant bilayers [2,3]. The lack of experimental reports of such a transition for the...

93. Monitoring food enzymatic digestion by small angle scattering

François Boué (LLB)

Poster

Proteins – here dairy and plant proteins (the latter being environmentally advantageous), are crucial macronutrients, but they also structure food. They form structures at multiple spatial scales, in particular in gels. Those are prepared from milk at low pH or enzymatically, or from an isolate of cruciferin and napin from canola seeds by heating.
To obtain structural information on digestion...

102. Ouzo phase occurrence with sequence control copolymers: influence of the lateral amphipathic units on the size and structure of nanoparticles

Henrique Trevisan (ESPCI)

Poster

Sequence regulation can be assured by the selection of monomer couples with reactivity ratios close to zero, which allows spontaneous cross-propagation copolymerization. The specific control of the polymer backbone strongly impacts the physicochemical properties of polymer materials. For instance, monomer design and customization of the solvent–monomer interactions open the way to functional...

81. Protomembranes at the origin of life

Prof. Judith Peters (Université Grenoble Alpes)

Poster

Planet Earth is about 4.5 billion years old. In this study, we focused on the membranes of the first forms of living entities that assembled from a set of simple molecules available on the prebiotic Earth. The lipid membrane is a structure formed by hydrophobic or amphiphilic biomolecules called lipids, which are used in living organisms for many purposes, as a barrier between the interior of...

91. Regioselective chemical modification of cellulose nanocrystals: tuning of the colloidal interactions and new properties

Bruno JEAN (CERMAV-CNRS Grenoble)

Poster

Native cellulose nanocrystals (CNC-I) and nanocrystals of the allomorph II of cellulose (CNC-II) are biosourced colloidal rods that are very interesting building blocks for the design of innovative materials thanks to their inherent properties (renewable origin, biocompatibility, self-organization and mechanical properties, etc.). In sharp contrast with CNC-I, CNC II have only been discussed...

88. Towards a comprehensive picture of temperature-responsive elastin-like peptides

Olga Matsarskaia

Poster

Elastin-like peptides (ELPs) are biomolecules mimicking the hydrophobic repeat units of elastin, a protein providing elasticity to biological tissues such as lung, ligaments and blood vessels. ELPs undergo a hydrophobic collapse upon crossing a lower critical solution temperature (LCST). Due to their stimulus-responsive properties, ELPs are of interest for a broad range of applications...

96. Translational and rotational diffusion coefficients of chitin nanocrystals determined by depolarized dynamic light scattering

Ms Jessica Bauhof (University of Stuttgart Physical Chemistry)

Poster

Chitin, which is mainly found in arthropods such as insects and crustaceans, is the second most abundant biopolymer besides cellulose.[1] Although about 1000 billion tons of chitin are produced in the biosphere every year, it is barely used to produce high-value products due to its difficult processability.[2] One promising approach to obtain such high-value products is the use of chitin...

85. Tuning hydrogel properties by the addition of clay nanoplatelets and counterion specific effects

Dr Natalie Malikova

Poster

Hydrogels are at the forefront of scientific attention especially in the biological and biomedical fields where they provide the basis for stimuli-responsive artificial tissues, vehicles for drug delivery or biosensors. We study physically crosslinked hydrogels based on ionenes, positively charged polyelectrolytes, for which strong counterion-specific effects have been observed previously [1]....