An Application of Polydopamine-dip Coating as a Gentle Surface Modification Process for Cryogel Disks

Abstract

The process called "polydopamine-dip coating" was successfully applied to modify the surface of poly(2-hydroxyethyl methacrylate), PHEMA, cryogel disks for the first time. This facile surface modification process fitted very well to the chemistry of cryogels since the integrity of the cryogel disks was maintained during the whole process. Polydopamine (PDA) nanocoating process was observed to be homogeneously performed through the pores and there was a net color change from white to brown after 24 h. The obtained (brownish) material (PHEMA-PDA) was characterized with respect to FTIR spectroscopy, pHpzc, and water-holding capacity analyses. The potential of this new material was studied by utilizing it as an adsorbent for the adsorption of Ni(II) from synthetic aqueous solutions. The equilibrium adsorption data were analyzed on the basis of the Langmuir, the Freundlich, and the Temkin isotherm models. In general, Ni(II) adsorption on PHEMA-PDA was evaluated as a favorable process as depicted from the studied models. The proposed approach was found to be a promising postsurface modification process for tailoring the surface of monolithic cryogels without any difficult synthesis steps and harsh chemicals.

Application of polydopamine coating in polyetheretherketone modification

“…For 3D printed PEEK scaffolds, the ideal coating can also be constructed by impregnation using PDA. Ma et al [18] implanted extracellular vesicles on a 3D-printed PEEK scaffold fixed with polydopamine into New Zealand white rabbits, and showed that this scaffold showed excellent osteogenic ability after 6 and 12 weeks through in vivo imaging, microCT, histology and immunohistochemical analysis. The cell adhesion sequence of arginine-glycine-aspartate (Arg−Gly−Asp, RGD) found in fibulin can bind to integrin receptors to mediate cell adhesion [19] .…”

Modelling the kinetics of direct Cu(II) adsorption on two porous resins modified with mussel-inspired chemistry

“…Despite numerous studies focusing on the adsorptive properties of PD coated surfaces [13,[17][18][19][20][21][22], there is little or no comprehensive information about the kinetics of metal adsorption on porous polymers coated with mussel-inspired chemistry. However, adsorption kinetics are important in the design and control of the entire adsorption process [23,24].…”