HYBRID POLYMERIC HOLLOW FIBER MEMBRANE, CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANE, AND PROCESSES FOR FABRICATING THE SAME

Hybrid hollow fiber membrane with improved gas separation efficiency

This technology relates to a polymer hollow fiber membrane and manufacturing method with excellent gas separation performance, a hybrid polymer hollow fiber membrane containing a fluorine-containing glassy polymer matrix and ladder-type polysilsesquioxane, and a hybrid carbon molecular sieve hollow fiber membrane manufactured by thermal decomposition.

This technology solves the problems of low energy efficiency, plasticization, and aging phenomenon of existing gas separation membranes. We provide a hybrid polymer hollow fiber membrane containing a fluorine-containing glassy polymer matrix and ladder-type polysilsesquioxane, and a carbon molecular sieve hollow fiber membrane manufactured by thermal decomposition.

This technology delays the relaxation of the polymer chain through the anti-aging and anti-plasticization effects of ladder-type polysilsesquioxane, and minimizes the collapse of the porous support to achieve excellent gas permeability and selectivity. In particular, it increases the CO2 permeability of the carbon molecular sieve hollow fiber membrane by 546% and suppresses physical aging, providing a high energy efficiency and large-capacity gas separation solution.

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Key Features:

• Uses a hybrid material combining a fluorine-containing glassy polymer matrix and ladder-type polysilsesquioxane (LPSQ)
• LPSQ's rigid double-stranded siloxane structure inhibits the movement of the polymer chain, providing anti-plasticization and aging resistance effects
• During the thermal decomposition process, LPSQ increases the glass transition temperature of the polymer, minimizing structural collapse of the porous support
• The organic functional groups contained in LPSQ maximize the performance of the material by enabling uniform mixing with the polymer matrix

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This technology was developed through support from the National Research Foundation of Korea's research project to realize the next-generation membrane molecular sieve function for high-efficiency N2/CH4 separation.

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