Yu, Li2025-12-172025-12-172016https://hdl.handle.net/11541.2/1235901 ethesis (xxvii, 142 pages) :illustrations (chiefly colour).Includes bibliographical references (pages 127-142)In this thesis, we systematically described the two functional polyelectrolyte-based materials, namely, the PDopa-PAH PECs-loaded hydrogel beads for water purification and PFO-(PDDA/PSS)n films for oil-repellent coatings. However, we think there are still some work needs to be done in the near future in order to further improve these projects.enEnvironmental chemistry.Polyelectrolytes.Waterthesis