Preparation of alginate hydrogel microparticles by gelation introducing cross-linkers using droplet-based microfluidics: a review of methods

Cheng Zhang (1) , Romain A Grossier (1) , Nadine Candoni (1) , Stéphane Veesler (1)

1 CINaM - Centre Interdisciplinaire de Nanoscience de Marseille

This review examines the preparation of alginate hydrogel microparticles by using droplet-based microfluidics, a technique widely employed for its ease of use and excellent control of physicochemical properties, with narrow size distribution. The gelation of alginate is realized “on-chip” and/or “off-chip”, depending on where cross-linkers are introduced. Various strategies are described and compared. Microparticle properties such as size, shape, concentration, stability and mechanical properties are discussed. Finally, we consider future perspectives for the preparation of hydrogel microparticles and their potential applications.

Mots clés: alginate; hydrogel; microparticle; crosslinking; droplet-based microfluidics

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matière Molle [cond-mat.soft]; Matériaux; Ingénierie biomédicale

Cheng Zhang, Romain A Grossier, Nadine Candoni, Stéphane Veesler. Preparation of alginate hydrogel microparticles by gelation introducing cross-linkers using droplet-based microfluidics: a review of methods. Biomaterials Research, In press, ⟨10.1186/s40824-021-00243-5⟩. ⟨hal-02938090v4⟩