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Han J, Najafi S, Byun Y, Geonzon L, Oh SH, Park J, Koo JM, Kim J, Chung T, Han IK, Chae S, Cho DW, Jang J, Jeong U, Fredrickson GH, Choi SH, Mayumi K, Lee E, Shea JE, Kim YS. Bridge-rich and loop-less hydrogel networks through suppressed micellization of multiblock polyelectrolytes. Nat Commun 2024; 15:6553. [PMID: 39095421 PMCID: PMC11297175 DOI: 10.1038/s41467-024-50902-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 07/24/2024] [Indexed: 08/04/2024] Open
Abstract
Most triblock copolymer-based physical hydrogels form three-dimensional networks through micellar packing, and formation of polymer loops represents a topological defect that diminishes hydrogel elasticity. This effect can be mitigated by maximizing the fraction of elastically effective bridges in the hydrogel network. Herein, we report hydrogels constructed by complexing oppositely charged multiblock copolymers designed with a sequence pattern that maximizes the entropic and enthalpic penalty of micellization. These copolymers self-assemble into branched and bridge-rich network units (netmers), instead of forming sparsely interlinked micelles. We find that the storage modulus of the netmer-based hydrogel is 11.5 times higher than that of the micelle-based hydrogel. Complementary coarse grained molecular dynamics simulations reveal that in the netmer-based hydrogels, the numbers of charge-complexed nodes and mechanically reinforcing bridges increase substantially relative to micelle-based hydrogels.
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Affiliation(s)
- Jihoon Han
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Saeed Najafi
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, USA
- Materials Research Laboratory, University of California, Santa Barbara, California, USA
| | - Youyoung Byun
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Lester Geonzon
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Seung-Hwan Oh
- Department of Chemical Engineering, Hongik University, Seoul, Republic of Korea
| | - Jiwon Park
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Jun Mo Koo
- Department of Organic Materials Engineering, Chungnam National University, Daejeon, Republic of Korea
| | - Jehan Kim
- Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Taehun Chung
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Im Kyung Han
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Suhun Chae
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Dong Woo Cho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Jinah Jang
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Unyong Jeong
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea
| | - Glenn H Fredrickson
- Materials Research Laboratory, University of California, Santa Barbara, California, USA
- Department of Chemical Engineering, University of California, Santa Barbara, California, USA
| | - Soo-Hyung Choi
- Department of Chemical Engineering, Hongik University, Seoul, Republic of Korea
| | - Koichi Mayumi
- The Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, Japan
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
| | - Eunji Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea.
| | - Joan-Emma Shea
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California, USA.
- Department of Physics, University of California, Santa Barbara, California, USA.
| | - Youn Soo Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, Republic of Korea.
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Klingler S, Hniopek J, Stach R, Schmitt M, Popp J, Mizaikoff B. Simultaneous Infrared Spectroscopy, Raman Spectroscopy, and Luminescence Sensing: A Multispectroscopic Analytical Platform. ACS MEASUREMENT SCIENCE AU 2022; 2:157-166. [PMID: 36785721 PMCID: PMC9838817 DOI: 10.1021/acsmeasuresciau.1c00048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Scientific questions in fields such as catalysis, monitoring of biological processes, or environmental chemistry demand analytical technologies combining orthogonal spectroscopies. Combined spectroscopic concepts facilitate in situ online monitoring of dynamic processes providing a better understanding of the involved reaction pathways. In the present study, a low-liquid-volume multispectroscopic platform was developed based on infrared attenuated total reflection (IR-ATR) spectroscopy combined with Raman spectroscopy and luminescence sensing. To demonstrate the measurement capabilities, exemplary analyte systems including water/heavy water and aqueous solutions of ammonium sulfate were analyzed as proof-of-principle studies. It was successfully demonstrated that three optical techniques may be integrated into a single analytical platform without interference providing synchronized and complementary data sets by probing the same minute sample volume. In addition, the developed assembly provides a gastight lid sealing the headspace above the probed liquid for monitoring the concentration of molecular oxygen also in the gas phase via luminescence quenching. Hence, the entire assembly may be operated at inert conditions, as required, for example, during the analysis of photocatalytic processes.
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Affiliation(s)
- Sarah Klingler
- Institute
of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee
11, Ulm, 89081, Germany
| | - Julian Hniopek
- Department
of Spectroscopy/Imaging, Leibniz-Institute
of Photonic Technologies, Jena, 07745, Germany
- Institute
of Physical Chemistry & Abbe Center of Photonics, Friedrich Schiller University Jena, Jena, 07743, Germany
| | - Robert Stach
- Hahn-Schickard, Sedanstraße
14, Ulm, 89077, Germany
| | - Michael Schmitt
- Institute
of Physical Chemistry & Abbe Center of Photonics, Friedrich Schiller University Jena, Jena, 07743, Germany
| | - Jürgen Popp
- Department
of Spectroscopy/Imaging, Leibniz-Institute
of Photonic Technologies, Jena, 07745, Germany
- Institute
of Physical Chemistry & Abbe Center of Photonics, Friedrich Schiller University Jena, Jena, 07743, Germany
| | - Boris Mizaikoff
- Institute
of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee
11, Ulm, 89081, Germany
- Hahn-Schickard, Sedanstraße
14, Ulm, 89077, Germany
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Chung T, Han J, Kim YJ, Jeong KJ, Koo JM, Lee J, Park HG, Joo T, Kim YS. Effect of anions on the phase transition temperature of two structurally isomeric polymers: poly( N-isopropylacrylamide) and poly(2-isopropyl-2-oxazoline). Polym Chem 2022. [DOI: 10.1039/d2py00543c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In chaotropic solution, the different lower critical solution temperature (LCST) increments of two structural isomers, namely, poly(N-isopropylacrylamide) (PNIPAAm) and poly(2-isopropyl-2-oxazoline) (PiPOx), is studied.
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Affiliation(s)
- Taehun Chung
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jihoon Han
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Young Jae Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Kyeong-Jun Jeong
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Jun Mo Koo
- Research Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT), Ulsan 44429, Republic of Korea
| | - Jemin Lee
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Hyung Gyu Park
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Taiha Joo
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
| | - Youn Soo Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea
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