Table 1.

Advances of polymer-functionalized pH-responsive membranes in recent years.

Base Membrane Material	Functionalizing Polymers	Applications	Reference
Polypiperazine-amide	PAH & PAA	Water remediation from perfluorinated toxic pollutants	Olimattel et al.80
Carboxylated carbon nanotubes	PAA	High efficiency of water-oil separation	Liu et al.81
PDMS (Electrospun)	PMMA	Filtration of fine inhalable particles (low ΔP)	Lu et al.82
PAI (Hollow fiber)	PEO & PMAA	Highly efficient gas separation (CO2:N2)	Mishra et al.83
Composite polyamide (Spiral wound)	PAA	Enhanced antifouling properties of membrane from gypsum	Ansari et al.85
Polypiperazine-amide	PAH & PAA	Enhanced antifouling properties of membrane from humic acid	Olimattel et al.86
PVDF	PMAA	Resistance to irreversible surface and pore fouling	Ma et al.87
HFP (Electrospun)	PMMA	Increased enzyme thermostability, reusability, and activity maintenance (for tetracycline removal)	Zdarta et al.90
PVDF	PMMA	Immobilization of ZVI/Pd for PCB degradation in water sources	Saad et al.22
PES	PAA	Precise catalyst loading during addition of carbon quantum dot-modified TiO2 layer	Heng et al.91
PVDF	PMAA	Addition of Pd bilayer with IPN for filtration control of two-component contaminants	Wang et al.92
CTA	PDM	Ion separation of lead and cadmium in water sources	Abdellaoui et al.94
Cellulose	PDM	Removal of chromium from water	Sánchez et al.95
Glass fiber	PDM and poly(dimethysiloxane)	High efficiency of water-oil separation	Zhou et al.96