Influence of the molecular structure of polybinaphthalene on the membrane separation performance

Fine-tuning the molecular structure of binaphthalene polyimides for gas separations

“…The simulation method was performed as previously described. [44] To improve accuracy, 10 polymer samples were calculated instead of 5.…”

“…polymerized binaphthalene monomers using a Sonogashira reaction but could not obtain high molar masses required for reliable membrane formation. [44] In this article, a new set of well-designed rigid and contorted polyimides is proposed that enables the fine tuning of the molecular structure. The polyimide structure is composed of novel bridged binaphthalene diamines and commercially available dianhydrides.…”

Binaphthalene-based polymer membranes with enhanced performance for solvent-resistant nanofiltration

“…The simulation calculated a dihedral angle of 49.1° for a methyl-bridged binaphthalene and a dihedral angle of 65.6° for a propyl-bridged binaphthalene. [48] Therefore, these are the most appropriate structures to study the influence of the dihedral angle, and hence the influence of the tilting degree in the structure, on the performance of the membranes To obtain a rigid polymer structure with a limited freedom of movement, thus ensuring a high porosity, amine monomers with a rigid phenyl core were used. Except for 1,3,5-benzenetriamine.3HCl (1,3,5-TA.3HCl), all amines were commercially available as a salt.…”

Elucidating the effect of chain extenders substituted by aliphatic side chains on morphology and gas separation of polyurethanes

“…However, their application is mostly challenged by permeability and selectivity trade-off relations [1][2][3][4][5][6][7]. Based on structure-property relations, significant approaches have been adopted to design polymeric membranes with high efficiency for gas separation [8][9][10][11][12]. Considering CO 2 capture, polyurethane (PU) membranes containing polar urethane and urea groups are appropriate candidates.…”