Synthesis, Surface and Spreading Properties of Lactobionamide-Grafted Amphiphilic Glycopolysiloxanes

Abstract

Three lactobionamide-grafted amphiphilic glycopolysiloxanes (LBPS) were synthesized using a two-step method. First, the aminopropyl functional polysiloxanes (APSO) were synthesized by equilibrium polymerization; then, lactobionic acid was conjugated to the APSO to give the glycopolysiloxanes LBPS. The final compositions of the amphiphilic glycopolysiloxanes were characterized by FTIR and 1 H NMR. Surface activities and spreading behaviors in aqueous solution of these three glycopolysiloxanes were investigated by surface tension measurements and contact angle measurements. The results show that these three glycopolysiloxanes have much higher surface activity than those of conventional carbon-carbon chain glycopolymers in aqueous solution and the spreading ability of three lactobionamide-grafted amphiphilic glycopolysiloxanes solution on low-energy surfaces is not only solely dependent on surface tension, but also dependent on hydrophilic-lipophilic balance of surfactant.

Block-copolymeric maltodextrin-based amphiphilic glycosilicones as surface-active systems

“…Glycosilicones belong to a unique class of carbohydrate polymers that combine the rigidity of (poly)saccharides and the flexibility of polysiloxane fragments in one system. In view of the availability of both hydrophilic and hydrophobic parts in the chain, these hybrid polymers are amphiphilic; 1,2 this property is in high demand for the design of new surface-active systems. Several studies have focused on glycosilicones as surfactants, [2][3][4][5][6] because they can be potentially used for the solubilization of non-polar compounds in biological systems 7,8 and in morphological studies of globular proteins 9 to understand the dynamics, mechanism, and morphology of proteinsurfactant complexes by partial unfolding of the protein chain.…”

“…In view of the availability of both hydrophilic and hydrophobic parts in the chain, these hybrid polymers are amphiphilic; 1,2 this property is in high demand for the design of new surface-active systems. Several studies have focused on glycosilicones as surfactants, [2][3][4][5][6] because they can be potentially used for the solubilization of non-polar compounds in biological systems 7,8 and in morphological studies of globular proteins 9 to understand the dynamics, mechanism, and morphology of proteinsurfactant complexes by partial unfolding of the protein chain. Applications of glycosilicones are not limited exclusively to surface-active agents, but they can also be used as additives in papermaking, 10 or as carbohydrate polymers, which reduce the brittleness and/or hydrophobicity of some materials.…”