Bioinspired Polydopamine (PDA) Chemistry Meets Ordered Mesoporous Carbons (OMCs): A Benign Surface Modification Strategy for Versatile Functionalization

Abstract

Mussel-inspired polydopamine (PDA) chemistry was employed for the surface modification of ordered mesoporous carbons (OMCs), improving the hydrophilicity, binding ability toward uranium ions, as well as enriching chemical reactivity for diverse postfunctionalization by either surface grafting or surface-initiated polymerization. Uniform PDA coating was deposited on the surface of CMK-3 type OMCs via self-polymerization of dopamine under mild conditions. Surface properties and morphology of the PDA-coated CMK-3 can be tailored by adjusting the dopamine concentration and coating time, without compromising the meso-structural regularity and the accessibility of the mesopores. Due to high density of −NH groups (4.7 μmol/m 2 or 2.8 group/nm 2 ) and −OH groups (9.3 μmol/m 2 or 5.6 group/nm 2 ) of the PDA coating, the modified CMK-3 showed improved hydrophilicity and superior adsorption ability toward uranyl ions (93.6 mg/g) in aqueous solution. Moreover, with the introduction of α-bromoisobutyryl bromide (BiBB) initiator to the PDA-coated CMK-3, we demonstrated for the first time that activators regenerated by electron transfer for atom transfer radical polymerization (ARGET ATRP) can be conducted for controlled growth of polymer brushes from the surface of OMCs. Thus, PDA chemistry paves a new way for surface modification of OMCs to create a versatile, multifunctional nanoplatform, capable of further modifications toward various applications, such as environmental decontamination, catalysis, and other areas.

Mussel‐Inspired Membrane Adsorber with Thiol Ligand for Patulin Removal: Adsorption and Regeneration Behaviors

“…Many researchers found that membrane surface modification using polymers with adsorption function could improve the removal abilities of membranes for micropollutants . Inspired by the strong adhesion of mussel proteins, dopamine coating technology provided a versatile platform for construction of varied functional membranes . The combination of adsorption and separation process could impart a wider application prospect to these modified membranes …”

Polymer brushes grafted from graphene via bioinspired polydopamine chemistry and activators regenerated by electron transfer atom transfer radical polymerization

“…Thus, the initiator molecules could be anchored on the surface the materials due to the high concentration of catechol and amine groups on PDA. In addition, it has been recently founded that dopamine could also be used as a reducing agent for GO . In comparison to other reduced procedures, PDA coating is a more green protocol.…”

Tris‐Stabilized MoS2 Nanosheets with Robust Dispersibility and Facile Surface Functionalization

“…Figure S10A (Supporting Information) shows the adsorption and polymerization process for grafting PDA on MoS 2 nanosheets. Seen from their UV–vis absorption spectra (Figure S10B, Supporting Information), PDA layer can be formed on MoS 2 nanosheets in Tris solution (pH 8.5) after being mixed for 40 min . And, the presence of PDA cannot damage the crystalline structure of MoS 2 nanosheets (Figure S10C,D, Supporting Information).…”