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Sun J, Lee C, Osuji CO, Gopalan P. Synthesis of High Etch Contrast Poly(3-hydroxystyrene)-Based Triblock Copolymers and Self-Assembly of Sub-5 nm Features. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian Sun
- Department of Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Changyeon Lee
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Chinedum O. Osuji
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Padma Gopalan
- Department of Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
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2
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Copolymerization of simple methacrylates by Cu(0)-mediated reversible deactivation radical polymerization. Polym J 2018. [DOI: 10.1038/s41428-018-0159-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Kang H, An S, Lee WJ, Kang GR, Kim S, Hur SM, Paeng K, Kim M. Stable polymer brushes with effectively varied grafting density synthesized from highly crosslinked random copolymer thin films. RSC Adv 2018; 8:24166-24174. [PMID: 35539156 PMCID: PMC9081858 DOI: 10.1039/c8ra04480e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 06/22/2018] [Indexed: 12/19/2022] Open
Abstract
Crosslinkable epoxy copolymers enable achieving highly stable P(S-b-MMA) brushes with controlled grafting density for close examination of phase separation behaviors.
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Affiliation(s)
- Hyungoo Kang
- Department of Chemistry and Chemical Engineering
- Inha University
- Incheon 22212
- Republic of Korea
| | - Sol An
- Department of Chemistry and Chemical Engineering
- Inha University
- Incheon 22212
- Republic of Korea
| | - Woo Jung Lee
- Department of Chemistry
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
| | - Ga Ryang Kang
- School of Polymer Science and Engineering
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Sangwon Kim
- Department of Polymer Science and Engineering
- Inha University
- Incheon 22212
- Republic of Korea
| | - Su-Mi Hur
- School of Polymer Science and Engineering
- Chonnam National University
- Gwangju 61186
- Republic of Korea
| | - Keewook Paeng
- Department of Chemistry
- Sungkyunkwan University
- Suwon 16419
- Republic of Korea
| | - Myungwoong Kim
- Department of Chemistry and Chemical Engineering
- Inha University
- Incheon 22212
- Republic of Korea
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Kanimozhi C, Kim M, Larson SR, Choi JW, Choo Y, Sweat DP, Osuji CO, Gopalan P. Isomeric Effect Enabled Thermally Driven Self-Assembly of Hydroxystyrene-Based Block Copolymers. ACS Macro Lett 2016; 5:833-838. [PMID: 35614756 DOI: 10.1021/acsmacrolett.6b00376] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We demonstrate through isomeric effect the modulation of thermal properties of poly(hydroxystyrene) (PHS)-based block copolymers (BCPs). A minimal structural change of substituting 3HS for 4HS in the BCP results in a drastic decrease in Tg, which in turn enables the thin film assembly of the BCP via thermal annealing. We synthesized a series of poly(3-hydroxystyrene-b-tert-butylstyrene) [P(3HS-b-tBuSt)] and poly(4-hydroxystyrene-b-tert-butylstyrene) [P(4HS-b-tBuSt)] BCPs by sequential anionic polymerization of protected 3HS/4HS monomer and tBuSt followed by deprotection. Measured Tg of P(3HS) was ∼20-30 °C lower than P(4HS) of comparable molecular weights. As a result, thermally driven self-assembly of P(3HS-b-tBuSt) BCPs in both bulk and thin film is demonstrated. For P(4HS-b-tBuSt) thermal annealing in thin-film at high temperatures results in poorly developed morphology due to cross-linking reaction of the 4HS block. The smallest periodicity observed for P(3HS-b-tBuSt) was 8.8 nm in lamellar and 11.5 nm in cylindrical morphologies. The functionality of the 3HS block was exploited to incorporate vapor phase metal oxide precursors to generate sub-10 nm alumina nanowires.
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Affiliation(s)
| | - Myungwoong Kim
- Department
of Chemistry, Inha University, Incheon 22212, Korea
| | | | | | - Youngwoo Choo
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
| | | | - Chinedum O. Osuji
- Department
of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
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From Self-Assembled Monolayers to Coatings: Advances in the Synthesis and Nanobio Applications of Polymer Brushes. Polymers (Basel) 2015. [DOI: 10.3390/polym7071346] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Sweat DP, Kim M, Schmitt AK, Perroni DV, Fry CG, Mahanthappa MK, Gopalan P. Phase Behavior of Poly(4-hydroxystyrene-block-styrene) Synthesized by Living Anionic Polymerization of an Acetal Protected Monomer. Macromolecules 2014. [DOI: 10.1021/ma501126t] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Daniel P. Sweat
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Myungwoong Kim
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Adam K. Schmitt
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Dominic V. Perroni
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Charles G. Fry
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Mahesh K. Mahanthappa
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
| | - Padma Gopalan
- Department of Chemistry and ‡Department of
Materials Science and Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States
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Cui G, Fujikawa M, Nagano S, Shimokita K, Miyazaki T, Sakurai S, Yamamoto K. Macroscopic Alignment of Cylinders via Directional Coalescence of Spheres along Annealing Solvent Permeation Directions in Block Copolymer Thick Films. Macromolecules 2014. [DOI: 10.1021/ma501033a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Guanghui Cui
- Department
of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Masamichi Fujikawa
- Department
of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Shusaku Nagano
- Department
of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Keisuke Shimokita
- Nitto Denko Corporation, 1-1-2,
Shimohozumi, Ibaraki, Osaka 567-8680, Japan
| | - Tsukasa Miyazaki
- Nitto Denko Corporation, 1-1-2,
Shimohozumi, Ibaraki, Osaka 567-8680, Japan
| | - Shinichi Sakurai
- Department
of Biobased Materials Science, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Katsuhiro Yamamoto
- Department
of Materials Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Chen L, Thérien-Aubin H, Wong MCY, Hoek EMV, Ober CK. Improved antifouling properties of polymer membranes using a 'layer-by-layer' mediated method. J Mater Chem B 2013; 1:5651-5658. [PMID: 32261189 DOI: 10.1039/c3tb20916d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymeric reverse osmosis membranes were modified with antifouling polymer brushes through a 'layer by layer' (LBL) mediated method. Based on pure physical electrostatic interaction, the attachment of LBL films did not alter separation performance of the membranes. In addition, the incorporation of an LBL film also helped to amplify the number of potential reaction sites on the membrane surfaces for attachment of antifouling polymer brushes, which were then attached to the surface. Attachment of the brushes included two different approaches, grafting to and grafting from. Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS) and water contact angle measurements showed successful growth of the LBL films and subsequently the polymer brushes. Using this method to modify reverse osmosis membranes, preliminary performance testing showed the antifouling properties of the as-modified membranes were much better than the virgin membrane with no significant loss in water flux and salt rejection.
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Affiliation(s)
- Lin Chen
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.
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9
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Yameen B, Farrukh A. Polymer Brushes: Promises and Challenges. Chem Asian J 2013; 8:1736-53. [DOI: 10.1002/asia.201300149] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Indexed: 11/11/2022]
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