Thermally cross-linked microporous polymeric membranes for CO₂ separation

We develop advanced cross-linked polymeric membranes that selectively separate carbon dioxide (CO₂) from other gases, with a focus on achieving both high separation performance and long-term stability under demanding conditions. By tailoring microporous architectures and enhancing resistance to plasticization, our membranes provide practical, low-energy solutions for capturing CO₂ from flue gas and other industrial sources. This work supports cleaner energy production and contributes to global efforts to mitigate climate change.

Selected Publications:

1.      Ju Ho Shin, Hyun Jung Yu, Jiyoon Jung, Heseong An, Jung Hoon Park, Albert S. Lee, Jong Suk Lee, Extrinsically microporous polymer membranes derived from thermally cross-linked perfluorinated aryl-ether-free polymers for gas separation, Nature Communications 16 (2025) 7143

(https://n.news.naver.com/mnews/article/003/0013469305?sid=102)

2.      Hyun Jung Yu, Chen-Hui Chan, Sang Yong Nam, Seok-Jhin Kim, Jong Suk Yoo, Jong Suk Lee, Thermally cross-linked ultra-robust membranes for plasticization resistance and permeation enhancement—A combined theoretical and experimental study, Journal of Membrane Science 646 (2022) 120250

3.      Heseong An, Albert S. Lee, Irshad Kammakakam, SeungSang Hwang, Jeong-Hoon Kim, Jung-Hyun Lee, Jong Suk Lee, Bromination/debromination-induced thermal crosslinking of 6FDA-Durene for aggressive gas separations, Journal of Membrane Science 545 (2018) 358

Ⅱ.Metal Ion Recovery

Novel polymer adsorbents for selective Cu²⁺ recovery

Reaction-enhanced membrane cascade process for the recovery of metal ions

We design membranes and sorbents that selectively capture and recover valuable metals from wastewater and spent batteries. By introducing chelating groups and hybrid structures, we create separation platforms that efficiently recover critical materials while minimizing environmental impact. This research not only reduces environmental pollution but also supports a circular economy by reusing critical materials needed for renewable energy and high-tech industries.

Selected Publications:

1.      Cheol Lee, Ho Jun Lee, Seung Jae Kwak, Won Bo Lee, Jong Suk Lee, Sustainable copper ion selection from simulated multi-metal battery leachates using calcium-activated polyphenylene oxide derivatives, Chemical Engineering Journal 522 (2025) 167937 (https://pinpointnews.co.kr/news/articleView.html?idxno=378406)

2.      Jeong Han Shin, Seung Hwan Kim, Cheol Hun Yoo, Ho Jun Lee, Bao Tran Duy Nguyen, Go Gi Lee, Jeong F Kim, Jong Suk Lee, Valorization of battery manufacturing wastewater: Recovery of high-value metal ions through reaction-enhanced membrane cascade, Chemical Engineering Journal 493 (2024) 152247

Ⅲ. Olefin/Paraffin Separation

Mixed matrix membranes containing defect-engineered ZIF-8 nanoparticles for C₃H₆/C₃H₈ separation

Separating olefins (like ethylene and propylene) from paraffins is one of the most energy-intensive operations in the chemical industry. Our group designs high-performance porous materials, including metal-organic frameworks (MOFs), and incorporates them into polymer matrices to produce mixed matrix membranes (MMMs). By integrating MOFs, ZIFs, and polymers, we develop scalable membranes that combine high selectivity with industrial durability, enabling energy-efficient hydrocarbon separations and reducing the environmental footprint of petrochemical processes.

Selected Publications:

1.      Ki Jin Nam, Amro M. O. Mohamed, Jeongho Seong, Heseong An, Dun-Yen Kang, Ioannis G. Economou, Jong Suk Lee, Cobalt-Based ZIF Composite Membranes: In Situ Defect Engineering for Enhanced Water Stability and Gas Separation, Small 21 (2025) 2409515 (https://www.news1.kr/local/daejeon-chungnam/5671340)

2.      Highly Permeable Mixed Matrix Membranes for Gas Separation via Dual Defect-Engineered Zeolitic Imidazolate Framework-8, Jeongho Seong, Ki Jin Nam, Heseong An, Seungho Yu, Ju Ho Shin, Ki Chul Kim, Sung Gu Kang, Prasad Reddy, Do-Young Hong, Seok-Jhin Kim, Jong Suk Lee, Small 20 (2024) 2401594

3.      Heseong An, Kie Yong Cho, Qiang Lyu, Da-Shiuan Chiou, Ki Jin Nam, Dun-Yen Kang, Li-Chiang Lin, Jong Suk Lee, Facile defect engineering of zeolitic imidazolate frameworks towards enhanced C3H6/C3H8 separation performance, Advanced Functional Materials 31 (2021) 2105577 (https://v.daum.net/v/kbLE9ia5xe?f=p)