Multifunctional Polydopamine Particles as a Thermal Stability Modifier to Prepare Antifouling Melt Blend Composite Membranes

Abstract

This study reports a novel, multifunctional, and easily obtained modifier to support the rapid advancements in the field of filtration. Polydopamine (PDA) particles (PDAPs) have been reported as a filler for constructing polymer composites, but because of their poor thermal stability, the use of PDAPs in high-temperature blend melt systems to construct antifouling membranes was rare. In this paper, high-thermal-stability methoxy polyethylene glycol amine (mPEG-NH2)-functionalized PDA nanoparticles (mPDAPs) were first used as a modifier in high-temperature blend melt polymer composites to construct antifouling composite membranes. First, high-thermal-stability mPDAPs with an average diameter of about 390 nm were prepared by immobilized mPEG-NH2 on the PDAP surface, then melt blend mPDAPs with ultrahigh-molecular-weight polyethylene/liquid paraffin (LP) solution and thermally reduced phase separation (TIPS) to construct antifouling membranes. A combination of properties including mechanical properties, filtration efficiency, and antifouling properties of hybrid composite membranes was investigated and demonstrated that mPDAPs were an efficient modifier for high-temperature melt blending systems. The aim of this study was to provide an effective approach to improve the membrane filtration performance by bulk hybrid modification of multifunctional nanoparticles.

Magnetic Molecularly Imprinted Nanoparticles for Rapid and Selective Detection of Dimethyl Phthalate in Water Using SERS

“…It has also been demonstrated that the PDA formed by the self-polymerization of dopamine on the surface of Fe 3 O 4 is thermally stable. For example, as a thermal stability modifier, PDA has been used to improve the perceived stability modification of carbon nanotubes and composite membranes. − In addition, previous research on the thermal stability of Ag nanoparticles indicated that high temperatures would not affect the SERS-enhanced effect of Ag nanoparticles …”

Self-Enhanced Antibacterial and Antifouling Behavior of Three-Dimensional Porous Cu2O Nanoparticles Functionalized by an Organic–Inorganic Hybrid Matrix

“…The formation of the rGO@R-Gel heterostructure originates from the fact that R-Gel and its oxidized R-Gel wrapped the rGO probably through P-P stacking or strong covalent bonds formed with the rGO surface. The Cu 2 O/rGO@R-Gel hybrid structure benefits from the continued growth of R-Gel and its further assembly by the induction of metallic copper ions or hydrogen bonding. − The Cu 2 O/rGO@R-Gel heterostructure composed of Cu 2 O, rGO, and R-Gel, all three, has a large, smooth, and fluent exchange channel for water molecules (Figure a,b,g). This will play a crucial role in the practical antifouling application of Cu 2 O/rGO@R-Gel.…”

Progress for Co-Incorporation of Polydopamine and Nanoparticles for Improving Membranes Performance

“…On the other hand, PDA NPs have poor thermal stability. Thus, functionalizing PDA NPs by high-thermal-stability methoxy polyethylene glycol amine (mPEG-NH 2 ) showed an ability to construct antifouling melt blend composite membranes [ 125 ]. It can be said that PAD NPs with their multifunctional properties have shown promising prospects in enhancing different water purification membranes.…”