Objective
The aim of the present project is a systematic theoretical and experimental investigation of the role of hydrophobic and electrostatic interactions in the behaviour of hydrophobically modified (HM) associating polyelectrolytes in aqueous solutions: self-assembly, gelation, phase separation etc. The existing theoretical approaches for the description of equilibrium and rheological properties of associating uncharged polymers will be generalized for the case of hydrophobically associating polyelectrolytes.
The experimental research will concentrate on a series of newly synthesized HM polyelectrolytes with well controlled degree of hydrophobicity prepared from natural polysaccharide chitin or its deacetylated form chitosan. The pliarity of such chitin derivatives is the possibility to influence their hydrophilic/hydrophobic balance both by varying the fraction and the chain length of hydrophobic stituents and by ionization of repeat units. The effect of polymer concentration, degree of hydrophobicity (which can be varied by changing the fraction and the chain length of hydrophobic n-alkyl groups), degree of ionization, ionic strength, temperature and shear rate on the physico-chemical properties of HM polysaccharides in aqueous solution (aggregation, gelation and phase separation) will be considered. Along with traditional rheological investigation of associating polymers, a particular attention will be paid to the development of the relationships between mollar mechanism of aggregation and macroscopic associative behaviour, utilizing techniques including light scattering, nuclear magnetic resonance, fluorescent probe method, small-angle X-ray scattering, calorimetry, tensiometry etc. This will permit to better understand physico-chemical mechanisms of aggregation and gelation playing an important role in the unfolding of numerous technological processes.
Fields of science (EuroSciVoc)
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
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Coordinator
38042 Grenoble
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.