Polysulfone pellets psu

Zirconium (IV) chloride (ZrCl₄, 99.5%), titanium (IV) isopropoxide (Ti [OCH(CH₃)₂]₄, 97%), 1,4-benzenedicarboxylic acid (BDC, 98%), dimethylformamide (DMF, 99.9%), and methanol (CH₃OH, 99.8%) were obtained from Sigma-Aldrich (St. Louis, MO, USA) for the preparation of MOFs NPs.
The PSU support sheets were prepared by dissolving polysulfone pellets (PSU, M_W = 35,000, Sigma-Aldrich) in DMF solvent. The chemicals for the IP, m-phenylenediamine (MPD, ≥99%) and trimesoyl chloride (TMC, ≥98.5%), were purchased from Fisher Scientific (Pittsburgh, PA, USA) and Sigma Aldrich, respectively. 2,2,4-trimethylpentane (isooctane, 99%) was obtained from Fisher Scientific and used as TMC solvent. Our recent study demonstrated that isooctane could replace commonly used hexane during the IP process as a more environmental-friendly solvent [18 (link)]. Millipore DI water (Synergy185, 18.2 MΩ-cm, EMD Millipore Corp., Billerica, MA, USA) was used to prepare MPD solution and for cleaning purposes. Calcium chloride (CaCl₂) and sodium chloride (NaCl) were obtained from Fisher Scientific and Sigma Aldrich, respectively. CSA/TEA salt materials, triethylamine (TEA, ≥99%) and (1s)-(+)-10-camphorsulfonic acid (CSA, 99%), were purchased from Sigma Aldrich.

Tetraethyl orthosilicate (TEOS, 98%, Sigma-Aldrich, St. Louis, MO, USA) and cetyltrimethylammonium bromide (CTAB, 95%, Aldrich) were used as silica raw material and surfactant, respectively, to prepare MCM-41 NPs. 2,2,4-Trimethylpentane (isooctane, 99%) was obtained from Fisher Scientific (Pittsburgh, PA, USA). Triethylamine (TEA, ≥99%) and (1s)-(+)-10-camphorsulfonic acid (CSA, 99%) used in CSA/TEA salt synthesis were purchased from Sigma-Aldrich. Sodium hydroxide (NaOH) and calcium chloride (CaCl₂) were obtained from Fisher Scientific. The casting solution used to make the PSU support layer was prepared by dissolving polysulfone pellets (PSU, M_W = 35,000, Sigma-Aldrich) in N,N-dimethylformamide (DMF, 99.8%, Sigma-Aldrich). m-Phenylenediamine (MPD, ≥99%, Fisher) and trimesoyl chloride (TMC, ≥98.5%, Sigma-Aldrich) were used in membrane preparation. The Millipore DI water (18.2 MΩ·cm, produced by Synergy 185, EMD Millipore Corp., Billerica, MA, USA) was used to prepare solutions and for rinsing and cleaning.