Quaternized Sodium Alginate--Ethyl-Oxazoline Copolymer Brushes and Their Supramolecular Networks Hydrogen Bonding.

Novel copolymer brushes of quaternized sodium alginate--(2-ethyl-2-oxazoline) are achieved by the grafting reaction of 2-ethyl-2-oxazoline (EOX) from benzyl bromide groups in quaternized sodium alginate (QSA). The average number of (EOX) structural units is mediated from 1 to 5 by changing the molar ratio of the EOX monomer to benzyl bromide side groups. There exists obvious microphase separation between the QSA backbone and (EOX) segments in the copolymer brushes due to their thermodynamic incompatibility.

Hemocompatible, biocompatible and antifouling Acylated dextran-g-polytetrahydrofuran graft copolymer with silver nanoparticles: Synthesis, characterization and properties.

The novel amphiphilic acylated dextran-g-polytetrahydrofuran (AcyDex-g-PTHF) graft copolymers have been successfully synthesized via combination of living cationic ring-opening polymerization of tetrahydrofuran (THF) to prepare living PTHF chains with different molecular weights (M) of 800-2800 g/mol with nucleophile substitution to mediate grafting numbers (G) of 4-25 per 1000 Dex monosaccharide. The microphase separation in the graft copolymer exists for the incompatibility of hard dextran backbone and soft PTHF branches and the confined crystallization of backbone. This copolymer behaves excellent hemocompatibility with red blood cells, good biocompatibility with HeLa cells and strong resistance to bovine serum albumin adsorption.

In-situ synthesis of acylated sodium alginate-g-(tetrahydrofuran-b-polyisobutylene) terpolymer/Ag-NPs nanocomposites.

Sodium alginate (SA) is a marine-derived biocompatible polysaccharide with huge reserves and polyisobutylene (PIB) is a saturated elastomer with gas barrier property, bio-inertness, and biocompatibility. Herein, we developed the biomass-based ASA-g-(THF-b-PIB) graft copolymer/Ag (3-11 nm, 0.7-3.