公开(公告)号：US09901880B2

公开(公告)日：2018-02-27

申请号：US15150056

申请日：2016-05-09

Applicant: Korea Institute of Science and Technology

Inventor： Jong Suk Lee ,  Seung Sang Hwang ,  Sunghwan Park ,  Albert Sung Soo Lee

IPC: B01D53/22 ,  B01D67/00 ,  B01D71/02

CPC classification number: B01D67/0067 ,  B01D53/228 ,  B01D71/021 ,  B01D2256/24 ,  B01D2257/102 ,  B01D2257/104 ,  B01D2257/2064 ,  B01D2257/504 ,  B01D2257/7022 ,  B01D2323/12 ,  B01D2323/24 ,  Y02C10/10

Abstract: Provided is a composition for use in fabricating a carbon molecular sieve membrane, including a fluorine-containing polymer matrix and polysilsesquioxane. The composition shows high selectivity to the gas to be separated and high separation quality by controlling the mixing ratio of the fluorine-containing polymer matrix with polysilsesquioxane as well as the type of fluorine-containing polymer matrix and polysilsesquioxane. Ancillary selective pore formation is enhanced by a so-called “autogenous fluorinated gas induced siloxane etching” (A-FISE) mechanism of fluorine-containing polymer/polysilsesquioxane blend precursors during carbonization. Therefore, it is possible to effectively separate gases having a small difference in particle size, which, otherwise, are difficult to be separated with the conventional polymer membranes.

公开(公告)号：US09855532B2

公开(公告)日：2018-01-02

申请号：US14697363

申请日：2015-04-27

Applicant: Korea Institute of Science and Technology

Inventor： Jong Suk Lee ,  Seung Sang Hwang ,  Albert Sung Soo Lee ,  Sunghwan Park ,  Sang Hee Park ,  Sanghyup Lee

IPC: B01D69/12 ,  B01D53/22 ,  B01D67/00 ,  B01D71/70 ,  C08G77/18

CPC classification number: B01D69/125 ,  B01D53/228 ,  B01D67/009 ,  B01D71/70 ,  B01D2323/08 ,  B01D2323/30 ,  B01D2323/345 ,  B01D2325/20 ,  C08G77/18

Abstract: The present disclosure provides a gas separation membrane using a ladder-structured polysilsesquioxane in which organic functional groups are attached to a long siloxane chain and a method for fabricating the same. In accordance with the present disclosure, a free-standing ladder-structured polysilsesquioxane-based membrane with various functional groups can be fabricated for gas separations. The performance of the gas separation membrane can be controlled through a variety of combinations of the organic functional groups linked to the siloxane chain. In addition, by controlling the molecular structure of the gas separation membrane through mixing of the ladder-structured polysilsesquioxane with an amine compound or conventional glassy or rubbery polymers or through thermal/UV-curing, the permeability and selectivity of the gas separation membrane can be controlled selectively.