《Dissecting the Role of Substrate on the Morphology and Separation Properties of Thin Film Composite Polyamide Membranes: Seeing Is Believing》 was published in Environmental Science & Technology in 2020. These research results belong to Peng, Lu Elfa; Yao, Zhikan; Yang, Zhe; Guo, Hao; Tang, Chuyang Y.. COA of Formula: ClNa The article mentions the following:
Recent studies show that the surface morphol. of a thin film composite (TFC) polyamide membrane depends strongly on its porous substrate. Nevertheless, the underlining mechanisms and the effects on membrane separation performance remain controversial. To dissect the exact role of pore properties, we synthesized TFC polyamide membranes on polycarbonate substrates with cylindrical track-etched pores (PCTE) of well-defined pore size ranging from 10 to 800 nm. Leaf-like roughness features were most prominent for polyamide films formed on substrates of intermediate pore sizes (80 and 100 nm). Smaller pores inhibited leaf-like features as a result of insufficient storage of m-phenylenediamine (MPD) monomers for the interfacial reaction, whereas larger pores resulted in diminished surface roughness due to the lack of confinement to the interfacially degassed nanobubbles. Substrate porosity plays a critical role on membrane water permeability, while smaller pores with greater pore d. are favored to improve membrane rejection. TFC polyamide membranes prepared on sponge-like polyethersulfone and polysulfone substrates exhibit better water permeability and salt rejection compared to the PCTE-TFC membranes, thanks to the simultaneously enhanced confinement and MPD storage effects. The mechanistic insights gained in this study reveals the huge potential of substrate design towards high performance TFC RO membranes. In the part of experimental materials, we found many familiar compounds, such as Sodium chloride(cas: 7647-14-5COA of Formula: ClNa)
Sodium chloride(cas: 7647-14-5) has been used for the preparation of tris buffered saline, phosphate buffered saline, MPM-2 (mitotic protein monoclonal 2) cell lysis buffer, immunoprecipitation wash buffer, LB (Luria-Bertani) media and dialysis buffer.COA of Formula: ClNa
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics