Ultra-deep removal of Pb by functionality tuned UiO-66 framework: A combined experimental, theoretical and HSAB approach.

Insights into the relationship between structure and properties of Spirobichroman-based polyimides: Effects of substituents on molecular structure and gas separation

Enhanced Gas Separation by Free Volume Tuning in a Crown Ether-Containing Polyimide Membrane

Functionalized two-dimensional g-C3N4 nanosheets in PIM-1 mixed matrix membranes for gas separation

Mixed-matrix membranes (MMMs) with combination of two distinct dimensional nanofillers (such as 1D-3D, 2D-3D, or 3D-3D, etc) have drawn special attention for gas separation applications due to their concerted effects on gas permeation and mechanical properties An amine-functionalized 1D multiwalled carbon nanotube (NH2 -MWCNT) with exceptional mechanical strength and rapid gas transport was crosslinked with an amine-functionalized 3D metal-organic framework (UiO-66-NH2 ) with high CO2 affinity in a Schiff base reaction The resultant crosslinked mixed-dimensional nanostructure was used as a nanofiller in a polysulfone (PSf) polymer matrix to explore the underlying synergy between 1D and 3D nanostructures on the gas separation performance of MMMs Cross-sectional scanning electron microscopy and mapping revealed the homogenous dispersion of UiO-66@MWCNT in the polymer matrix The MMM containing 50 wt % UiO-66@MWCNT demonstrated a superior permeability 83 Barrer as compared to the 42 Barrer of pure PSf membrane for CO2  Moreover, the selectivity (CO2 /CH4 ) of this MMM was enhanced to 395 from the 280 observed for pure PSf under similar conditions of pressure and temperature

Mixed Dimensional Nanostructure (UiO-66-Decorated MWCNT) as a Nanofiller in Mixed-Matrix Membranes for Enhanced CO2 /CH4 Separation.

Synthesised spirobichroman‐based polyimide functionalized by pyridine: Effects of substituent position on gas separation and thermal properties

The invention relates to the technical field of organic chemistry, in particular to a diphenylamine substituted pyridine diamine monomer containing an imine ring and a preparation method thereof, anda Troger's base polymer and a preparation method and application thereof. The diphenylamine substituted pyridine diamine monomer containing an imine ring contains a rigid aromatic structure, a tertiary amino pyridine structure and a large substituent group, so that the self-polymerized Troger's base polymer has the rigid aromatic structure and the V-shaped bridging structure; and the obtained Troger's base polymer has characteristics of high selectivity and high permeability, and especially has high gas permeation capacity and high separation capacity on CO2.

Diphenylamine substituted pyridine diamine monomer containing imine ring and preparation method thereof, and Troger's base polymer and preparation method and application thereof

The invention provides a tetramine monomer containing a spiro structure and a preparation method and application thereof, and polyamide and preparation and application thereof, and belongs to the technical field of gas membrane separation. According to the invention, a spiro center in a microporous polymer (PIMs) is introduced into a tetramine monomer, so that the tetramine monomer containing an aliphatic group (methylene) and having a microporous structure can be obtained. The polyamide film prepared from the tetramine monomer has the characteristics of high gas selectivity, high permeability, good solubility, good selectivity and the like, also has excellent thermal properties, and can be used as a novel polyamide gas separation film.

Tetramine monomer containing spiro structure, preparation method and application of tetramine monomer, and polyamide and preparation and application thereof

The invention provides a diamine monomer containing a spiro pyran structure, a preparation method and application thereof, polyimide and preparation and application thereof, and belongs to the technical field of gas membrane separation. The diamine monomer has a micro-pore structure and contains a flexible group (ether bond) and a pyridine structure, a polyimide film prepared from the diamine monomer has a micro-pore structure, a flexible group (ether bond) and a pyridine structure, due to the micro-pore structure, gas micromolecules can easily permeate, the selective permeability of the filmis improved; due to the existence of a flexible group (ether bond), the free volume and flexibility of a polyimide molecular chain can be increased, a solvent is easy to permeate, the problem of poorsolubility of a traditional gas separation membrane caused by a rigid chain is solved, the gas separation membrane has good solubility in a common organic solvent; the introduction of a basic group pyridine structure can increase the permeability of acidic greenhouse gas carbon dioxide and increase the separation efficiency of other gases and carbon dioxide.

Li Li

Papers

Insights into the relationship between structure and properties of Spirobichroman-based polyimides: Effects of substituents on molecular structure and gas separation

Synthesised spirobichroman‐based polyimide functionalized by pyridine: Effects of substituent position on gas separation and thermal properties

Diphenylamine substituted pyridine diamine monomer containing imine ring and preparation method thereof, and Troger's base polymer and preparation method and application thereof

Tetramine monomer containing spiro structure, preparation method and application of tetramine monomer, and polyamide and preparation and application thereof

Diamine monomer containing spiro pyran structure, preparation method and application thereof, polyimide and preparation and application thereof