The tripartite role of 2D covalent organic frameworks in graphene-based organic solvent nanofiltration membranes

Multifunctional Bacterial Cellulose/Covalent Organic Framework Composite Membranes with Antifouling and Antibacterial Properties for Dye Separation

“…The SEM images shows that COF nanosheets cannot be uniformly deposited on MCE substrates to form dense and smooth COF membranes (Figure 3a), which is mainly due to the rigidity of COF nanosheets and the π−π stacking effect between adjacent layers. 48 On the contrary, the pure BC membrane shows a continuous, smooth, and defect-free surface in SEM images (Figure 3b). Similarly, the surface of the BC/COF composite membrane prepared by the addition of BC is compact and smooth (Figure 3c), which is due to the easy formation of the network structure of BC nanofibers connecting the COF nanosheets through hydrogen bonding to make up the defect of the COF membrane.…”

“…The tensile strength of the composite membrane can reach 4.73 MPa due to the introduction of BC (Figure S5b). The SEM images shows that COF nanosheets cannot be uniformly deposited on MCE substrates to form dense and smooth COF membranes (Figure a), which is mainly due to the rigidity of COF nanosheets and the π–π stacking effect between adjacent layers . On the contrary, the pure BC membrane shows a continuous, smooth, and defect-free surface in SEM images (Figure b).…”

The coming of age of water channels for separation membranes: from biological to biomimetic to synthetic

“…152 Alongside the presence of in-plane pores, 2D COFs were capable of providing transport ''shortcuts'' for reducing the tortuous pathway through the GO nanosheets to achieve an overall performance enhancement. 213 Intercalating Ti 3 C 2 T x into GO nanosheets, on the other hand, was able to prevent the formation of nonselective channels and/or pinholes in MXene-based nanolaminates, resulting in higher rejection rates towards organic dye and salt solutions. 214 3.3.2.2 Supported lipid bilayer membranes.…”

Highly crystalline and robust covalent organic framework membranes for predictable solvent transport and molecular separation

“…20 However, the research involved in solvent transport through COF membranes has still been decient compared with the advanced progress of COF membrane materials. 21,22 According to the Hagen-Poiseuille equation, the solvent permeance of reported COF membranes was explicitly demonstrated to be linearly dependent on the inverse solvent viscosity. [23][24][25] Nevertheless, in addition to solvent viscosity, the effect of nanopore dimensions, thickness and chemical structures of COF membranes on the solvent permeance remains highly elucidated to disclose the transport mechanism.…”