Oxidative Gelation of Dopamine-modified Polyaspartamides by NaIO₄

Abstract

Novel adhesive polyaspartamides containing catechol and primary amine pendent groups were synthesized through successive ring-opening aminolysis reactions of dopamine (DOP) and ethylenediamine (EDA) with polysuccinimide (PSI). The oxidative gelation of aqueous dopamine-modified polyaspartamide was observed by adding NaIO 4 as the oxidizing reagent. FTIR, UV-vis and oscillatory rheometry was used to elucidate the oxidative cross-linking toward gel formation. The prepared gel was characterized by the swelling degree, thermogravimetric analysis (TGA), and by scanning electronic microscopy (SEM).

Co-bath hot-batch dyeing of cotton fibers with dopamine and CI reactive red 239

“…Dopamine has a strong adsorption capacity and can occur in complex polymerization reactions. 10,27 In this study, a process was used to force dopamine and reactive dyes (RR239) to penetrate (e.g. pressure) and adsorb uniformly (e.g.…”

“…7,8 The catechol structure in polydopamine can form covalent bonding crosslinks with materials containing sulfhydryl or amino functional groups, or chelate and coordinate with materials containing metals and metal oxides, and can graft materials onto polydopamine coatings, resulting in surface modified materials with special functions. 9–13…”

“…7,8 The catechol structure in polydopamine can form covalent bonding crosslinks with materials containing sulfhydryl or amino functional groups, or chelate and coordinate with materials containing metals and metal oxides, and can graft materials onto polydopamine coatings, resulting in surface modified materials with special functions. [9][10][11][12][13] The wide applicability of polydopamine to substrates and mild reaction conditions is also suitable for functionalized surface modification treatment of textile materials, such as the preparation of silver nanoparticles (AgNPs)-polydopamine-coated silk by uniformly depositing AgNPs on the surface of silk fibers with long-lasting antibacterial and antimicrobial effects using polydopamine as the reducing agent. 14 On silk fabrics, the laccase has been used to catalyze the oxidative polymerization of dopamine to prepare ultraviolet-resistant silk fabrics by the adjustment of the amount of laccase and reaction time.…”