Skip to Main content Skip to Navigation
Journal articles

Synthesis and physicochemical characterization of a novel ampholytic pullulan derivative with amphiphilic behavior in alkaline media

Abstract : Pullulan derivative was synthesized by coupling carboxymethylpullulan (degree of substitution ) and dimethylaminopropylamine (DMAPA), activated by a hydrosoluble carbodiimide -(3-dimethylaminopropyl)-N-ethylcarbodiimide hydrochloride (EDAC). FTIR and 13C and 1H NMR spectroscopic analyses have evidenced that the polysaccharide has been successfully modified. 1H NMR, nitrogen analysis, and conductimetric measurements allow determination of the degree of substitution in both carboxylic acid and amine functions. We have found that both functions present a similar DS of 0.35, which is characteristic of an ampholytic polymer with possible zwitterionic-type properties. Solution properties have been studied by flow field flow fractionation (F4) coupled on-line with multiangle laser light scattering (MALLS) and quasi elastic light scattering (QELS), surface tension, and viscosity measurements. The behavior has been found largely pH dependent and an amphiphilic behavior has been evidenced in alkaline media.
Document type :
Journal articles
Complete list of metadatas

https://hal-normandie-univ.archives-ouvertes.fr/hal-01866841
Contributor : Luc Picton <>
Submitted on : Monday, September 3, 2018 - 4:27:39 PM
Last modification on : Tuesday, October 20, 2020 - 6:48:06 PM

Identifiers

Citation

Z. Souguir, S. Roudesli, E. About-Jaudet, D. Le Cerf, L. Picton. Synthesis and physicochemical characterization of a novel ampholytic pullulan derivative with amphiphilic behavior in alkaline media. Journal of Colloid and Interface Science, Elsevier, 2007, 313 (1), pp.108 - 116. ⟨10.1016/j.jcis.2007.03.012⟩. ⟨hal-01866841⟩

Share

Metrics

Record views

62