Rheological properties of hydrophobic ethoxylated urethane (HEUR) in the presence of methylated β-cyclodextrin

Effects of β-cyclodextrin and β-cyclodextrin polymer addition and temperature on the modulation of hydrophobic interactions in aqueous solutions of two hydrophobically modified biopolymers

“…The gradual decrease of the viscosity is attributed to the formation of complexes between the CD molecules and the hydrophobic moieties through a process where the polymer hydrophobic tails are hidden within the CD cavities, and thereby the hydrophobic associations are decoupled. This type of behavior has been reported [1,2,5,[8][9][10][11][12] for hydrophobically modified polymers of various natures in the presence of cyclodextrin monomers. It is interesting to note that in spite of the high molecular weight of poly(b-CDN + ), the aqueous solution of this cosolute has a very low viscosity, which suggests that the branched structure of this compound yields compact molecules.…”

“…In recent years, the interaction between cyclodextrin monomers and nonionic amphiphilic polymers has attracted a great deal of interest [1][2][3][4][5][6][7][8][9][10][11][12][13]. Cyclodextrin monomers are water-soluble cyclic oligosaccharides consisting of six (a-CD), seven (b-CD), eight (c-CD), or more D-glucopyranose units.…”

“…In aqueous solution in the presence of a polymer with attached hydrophobic groups, the CD molecules relatively hydrophobic cavity can accommodate the hydrophobic tails of the polymer leading to deactivation of hydrophobic interactions. Several studies [1,2,[5][6][7][8][9][10][11][12][13][14] have shown that the intensity of the hydrophobic interactions can be tuned by adding different amounts of cyclodextrin compounds. It has been established [15][16][17] that CD molecules form inclusion complexes with the hydrophobic moieties through a process where the hydrophobic tails of the polymer chains are hidden within the CD cavities and thereby decouple hydrophobic associations.…”

Shear-thickening in aqueous surfactant-associative thickener mixtures

“…To further probe the nature of these interactions, b-cyclodextrin was added to L-100/X-45 aqueous blends. As mentioned earlier, b-cyclodextrin and its derivatives have been shown to disrupt hydrophobic interactions in solution [38][39][40][41][42][43][44]. In our studies, b-cyclodextrin was added at 1.0 wt% concentration to a series of solutions having HEAT L-100 between 0.1 and 4.0 wt% concentration.…”

Molecular recognition of naphthalenediamine by polyamine modified β-cyclodextrin:yttrium metal complexes

“…A lot of molecular recognition investigation has been reported so far. At present, the molecular recognition by b-CD focuses on fullerene [5,6], carbohydrates [7,8], polymer [9][10][11][12] and ternary inclusion complexes [13][14][15][16][17][18][19][20].…”