-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
On March 14, it was reported from the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences that the team of researcher Yang Weishen and associate researcher Peng Yuan developed a new type of organic framework (MOFs) material, which realizes the synthesis of hydrogen and carbon dioxide.
High precision separation
.
The research team proposes a new concept of soft-solid defect-free metal-organic frameworks (MOFs) composite separation membranes by designing a facile in-situ growth combined with a new strategy for confinement interfacial polymerization, and realizes hydrogen with extremely small size differences.
High-precision separation of carbon dioxide
How is the new MOFs film prepared? Peng Yuan introduced that they first grew micron-sized, quasi-vertical, discrete layered Zn ₂ (Bim) ₄ solid MOF grains on a commercialized inexpensive flexible porous organic carrier.
Gas mass transfer is achieved by fully exposing the two-dimensional straight-through molecular sieve channels between the Zn ₂
(Bim)₄ grain layers .
Subsequently, the research team constructed a soft polyamide-solid-state Zn₂(Bim) ₄ connected modular network structure through a confinement interfacial polymerization operation
.
The nano-thick and highly cross-linked polyamide network can be tightly connected to the sides of adjacent Zn2(Bim) ₄ grains, forming a full coverage of intergranular non-selective defects while ensuring full Zn₂(Bim) ₄ interlayer direct channels.
₄ ₄ ₄
The defect-free separation membranes described above have unique advantages in gas separation applications
.
The results show that the two-dimensional straight channels between the quasi-vertical Zn₂(Bim)4 grains are the main mass transfer channels for the gas, so that ultra-high hydrogen and carbon dioxide sieving accuracy can be obtained, and the separation selectivity is higher than that of other MOFs-based separation membranes that have been reported.
This work takes full advantage of the multiple advantages of MOFs, such as macromolecular sieving ability, excellent polymer flexibility, cheap and easy-to-obtain carriers, and simple and easy-to-scale preparation strategies, opening up a new path for the creation of MOFs-based membranes with industrial application prospects
.
Peng Yuan said that the team will further customize the specific separation membrane for the precise identification, separation and purification of the specified separation system by virtue of the modular functional design strategy
