1
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Kalita U, Jafari VF, Ashokkumar M, Singha NK, Qiao GG. Synthesis of ultra-high molecular weight homo- and copolymers via an ultrasonic emulsion process with a fast rate. Commun Chem 2024; 7:113. [PMID: 38755261 PMCID: PMC11099186 DOI: 10.1038/s42004-024-01191-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 04/26/2024] [Indexed: 05/18/2024] Open
Abstract
In the forefront of advanced materials, ultra-high molecular weight (UHMW) polymers, renowned for their outstanding mechanical properties, have found extensive applications across various domains. However, their production has encountered a significant challenge: the attainment of UHMW polymers with a low dispersity (Ɖ). Herein, we introduce the pioneering technique of ultrasound (US) initiated polymerization, which has garnered attention for its capability to successfully polymerize a multitude of monomers. This study showcases the synthesis of UHMW polymers with a comparatively low Ɖ ( ≤ 1.1) within a remarkably short duration ( ~ 15 min) through the amalgamation of emulsion polymerization and high-frequency ultrasound-initiated polymerization. Particularly noteworthy is the successful copolymerization of diverse monomers, surpassing the molecular weight and further narrowing the Ɖ compared to their respective homopolymers. Notably, this includes monomers like vinyl acetate, traditionally deemed unsuitable for controlled polymerization. The consistent production and uniform dispersion of radicals during ultrasonication have been identified as key factors facilitating the swift fabrication of UHMW polymers with exceptionally low Ɖ.
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Affiliation(s)
- Uddhab Kalita
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, 3010, Victoria, Australia
- School of Chemistry, The University of Melbourne, Parkville, 3010, Victoria, Australia
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur, 721302, WB, India
| | - Vianna F Jafari
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, 3010, Victoria, Australia
| | | | - Nikhil K Singha
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, Kharagpur, 721302, WB, India.
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, 3010, Victoria, Australia.
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2
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Ma Q, Qiao GG, An Z. Visible Light Photoiniferter Polymerization for Dispersity Control in High Molecular Weight Polymers. Angew Chem Int Ed Engl 2023; 62:e202314729. [PMID: 37814139 DOI: 10.1002/anie.202314729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 10/07/2023] [Accepted: 10/09/2023] [Indexed: 10/11/2023]
Abstract
The synthesis of polymers with high molecular weights, controlled sequence, and tunable dispersities remains a challenge. A simple and effective visible-light controlled photoiniferter reversible addition-fragmentation chain transfer (RAFT) polymerization is reported here to realize this goal. Key to this strategy is the use of switchable RAFT agents (SRAs) to tune polymerization activities coupled with the inherent highly living nature of photoiniferter RAFT polymerization. The polymerization activities of SRAs were in situ adjusted by the addition of acid. In addition to a switchable chain-transfer coefficient, photolysis and polymerization kinetic studies revealed that neutral and protonated SRAs showed different photolysis and polymerization rates, which is unique to photoiniferter RAFT polymerization in terms of dispersity control. This strategy features no catalyst, no exogenous radical source, temporal regulation by visible light, and tunable dispersities in the unprecedented high molecular weight regime (up to 500 kg mol-1 ). Pentablock copolymers with three different dispersity combinations were also synthesized, highlighting that the highly living nature was maintained even for blocks with large dispersities. Tg was lowered for high-dispersity polymers of similar MWs due to the existence of more low-MW polymers. This strategy holds great potential for the synthesis of advanced materials with controlled molecular weight, dispersity and sequence.
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Affiliation(s)
- Qingchi Ma
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Greg G Qiao
- Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, Victoria, 3010, Australia
| | - Zesheng An
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences, Jilin University, Changchun, 130012, China
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3
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Jafari VF, Mossayebi Z, Allison-Logan S, Shabani S, Qiao GG. The Power of Automation in Polymer Chemistry: Precision Synthesis of Multiblock Copolymers with Block Sequence Control. Chemistry 2023; 29:e202301767. [PMID: 37401148 DOI: 10.1002/chem.202301767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 07/05/2023]
Abstract
Machines can revolutionize the field of chemistry and material science, driving the development of new chemistries, increasing productivity, and facilitating reaction scale up. The incorporation of automated systems in the field of polymer chemistry has however proven challenging owing to the demanding reaction conditions, rendering the automation setup complex and costly. There is an imminent need for an automation platform which uses fast and simple polymerization protocols, while providing a high level of control on the structure of macromolecules via precision synthesis. This work combines an oxygen tolerant, room temperature polymerization method with a simple liquid handling robot to automatically prepare precise and high order multiblock copolymers with unprecedented livingness even after many chain extensions. The highest number of blocks synthesized in such a system is reported, demonstrating the capabilities of this automated platform for the rapid synthesis and complex polymer structure formation.
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Affiliation(s)
- Vianna F Jafari
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Zahra Mossayebi
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Stephanie Allison-Logan
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Sadegh Shabani
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
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4
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Carmeli I, Bounioux CM, Mickel P, Richardson MB, Templeman Y, Scofield JMP, Qiao GG, Rosen BA, Yusupov Y, Meshi L, Voelcker NH, Diéguez O, Miloh T, Král P, Cohen H, Richter SE. Unidirectional rotation of micromotors on water powered by pH-controlled disassembly of chiral molecular crystals. Nat Commun 2023; 14:2869. [PMID: 37208331 DOI: 10.1038/s41467-023-38308-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 04/24/2023] [Indexed: 05/21/2023] Open
Abstract
Biological and synthetic molecular motors, fueled by various physical and chemical means, can perform asymmetric linear and rotary motions that are inherently related to their asymmetric shapes. Here, we describe silver-organic micro-complexes of random shapes that exhibit macroscopic unidirectional rotation on water surface through the asymmetric release of cinchonine or cinchonidine chiral molecules from their crystallites asymmetrically adsorbed on the complex surfaces. Computational modeling indicates that the motor rotation is driven by a pH-controlled asymmetric jet-like Coulombic ejection of chiral molecules upon their protonation in water. The motor is capable of towing very large cargo, and its rotation can be accelerated by adding reducing agents to the water.
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Affiliation(s)
- Itai Carmeli
- Department of Materials Science and Engineering, Faculty of Engineering & University Center for Nano Science and Nanotechnology, Tel Aviv University, Tel-Aviv, 6997801, Israel
| | - Celine M Bounioux
- Department of Materials Science and Engineering, Faculty of Engineering & University Center for Nano Science and Nanotechnology, Tel Aviv University, Tel-Aviv, 6997801, Israel
| | - Philip Mickel
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA
| | | | - Yael Templeman
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105 POB 653, Israel
| | - Joel M P Scofield
- Department of Chemical Engineering, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Brian Ashley Rosen
- Department of Materials Science and Engineering, Faculty of Engineering & University Center for Nano Science and Nanotechnology, Tel Aviv University, Tel-Aviv, 6997801, Israel
| | - Yelena Yusupov
- Department of Materials Science and Engineering, Faculty of Engineering & University Center for Nano Science and Nanotechnology, Tel Aviv University, Tel-Aviv, 6997801, Israel
| | - Louisa Meshi
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, 84105 POB 653, Israel
| | - Nicolas H Voelcker
- Drug Delivery, Disposition, and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Oswaldo Diéguez
- Department of Materials Science and Engineering, Faculty of Engineering & University Center for Nano Science and Nanotechnology, Tel Aviv University, Tel-Aviv, 6997801, Israel
- The Raymond and Beverly Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv, 6997801, Israel
| | - Touvia Miloh
- School of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv, 6997801, Israel
| | - Petr Král
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL, 60607, USA.
- Department of Physics, Pharmaceutical Sciences, and Chemical Engineering, University of Illinois at Chicago, Chicago, IL, 60607, USA.
| | - Hagai Cohen
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Shachar E Richter
- Department of Materials Science and Engineering, Faculty of Engineering & University Center for Nano Science and Nanotechnology, Tel Aviv University, Tel-Aviv, 6997801, Israel.
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5
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Feng A, Onggowarsito C, Mao S, Qiao GG, Fu Q. Divide and Conquer: A Novel Dual-Layered Hydrogel for Atmospheric Moisture Harvesting. ChemSusChem 2023:e202300137. [PMID: 37019848 DOI: 10.1002/cssc.202300137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 04/05/2023] [Indexed: 06/16/2023]
Abstract
Atmospheric water harvesting (AWH) has been recognized as a next-generation technology to alleviate water shortages in arid areas. However, the current AWH materials suffer from insufficient water adsorption capacity and high-water retention, which hinder the practical application of AWH materials. In this study, we developed a novel dual-layered hydrogel (DLH) composed of a light-to-heat conversion layer (LHL) containing novel polydopamine-manganese nanoparticles (PDA-Mn NPs) and a water adsorption layer (WAL) made of 2-(acryloyloxyethyl) trimethylammonium chloride (AEtMA). The WAL has a strong ability to adsorb water molecules in the air and has a high-water storage capacity, and the PDA-Mn NPs embedded in the LHL have excellent photothermal conversion efficiency, leading to light-induced autonomous water release. As a result, the DLH displays a high-water adsorption capacity of 7.73 g g-1 under optimal conditions and could near-quantitatively release captured water within 4 h sunlight exposure. Coupled with its low cost, we believed that the DLH will be one of the promising AWH materials for practical applications.
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Affiliation(s)
- An Feng
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, NSW, 2007, Australia
| | - Casey Onggowarsito
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, NSW, 2007, Australia
| | - Shudi Mao
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, NSW, 2007, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne Parkville, Melbourne, Victoria, 3010, Australia
| | - Qiang Fu
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, NSW, 2007, Australia
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6
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Mossayebi Z, Jafari VF, Gurr PA, Simons R, Qiao GG. Reduced Ice Adhesion Using Amphiphilic Poly(Ionic Liquid)-Based Surfaces. ACS Appl Mater Interfaces 2023; 15:7454-7465. [PMID: 36708328 DOI: 10.1021/acsami.2c21500] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Ice build-up on solid surfaces causes significant economic losses for a range of industries. One solution to this problem is the development of coatings with low ice adhesion strength. Amphiphilic poly(ionic liquid) (PIL)-based surfaces have been recently reported for antifogging/antifrosting applications. However, they have possible anti-icing properties through lowering the ice adhesion strength that have yet to be reported. Herein, we designed well-defined triblock copolymers composed of a polydimethylsiloxane component coupled with PIL segments of poly([2 (methacryloyloxy)ethyl] trimethylammonium chloride) (PMETAC), which were subsequently UV-cured with an oligo(ethylene glycol) dimethacrylate (OEGDMA) cross-linker. The structure-property relationships of the resultant semi-interpenetrating polymer networks (SIPNs) were investigated by varying the counterion (i.e., trimethylammonium bis(trifluoromethanesulfonyl)imide (TFSI-)) and the content of the PIL segments and cross-linker. An ice adhesion strength as low as 13.3 ± 8.6 kPa was observed for the coating containing 12.5 wt % of PMETAC segment and 5 wt % of OEGDMA, which is one of the lowest values reported so far for the amphiphilic coatings. Characterization of the coatings in terms of surface features, wettability, and hydration states have enabled the elucidation of different deicing mechanisms. Self-lubrication due to the existence of nonfreezable bound water led to the obtained low ice adhesion strength. This work offers a new approach for the exploration of PIL-based icephobic coatings for practical applications.
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Affiliation(s)
- Zahra Mossayebi
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
- CSIRO Manufacturing, Melbourne, Victoria 3169, Australia
| | - Vianna F Jafari
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Paul A Gurr
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Ranya Simons
- CSIRO Manufacturing, Melbourne, Victoria 3169, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
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7
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Li R, Zhang S, Li Q, Qiao GG, An Z. An Atom‐Economic Enzymatic Cascade Catalysis for High‐Throughput RAFT Synthesis of Ultrahigh Molecular Weight Polymers. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202213396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ruoyu Li
- Jilin University College of Chemistry CHINA
| | - Shudi Zhang
- Jilin University School of Life Sciences CHINA
| | - Quanshun Li
- Jilin University School of Life Sciences CHINA
| | - Greg G. Qiao
- University of Melbourne Department of Chemical Engineering AUSTRALIA
| | - Zesheng An
- Jilin University State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry 2699 Qianjin Street, Changchun 130012, China 130012 Changchun CHINA
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8
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Li R, Zhang S, Li Q, Qiao GG, An Z. An Atom‐Economic Enzymatic Cascade Catalysis for High‐Throughput RAFT Synthesis of Ultrahigh Molecular Weight Polymers. Angew Chem Int Ed Engl 2022; 61:e202213396. [DOI: 10.1002/anie.202213396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ruoyu Li
- Jilin University College of Chemistry CHINA
| | - Shudi Zhang
- Jilin University School of Life Sciences CHINA
| | - Quanshun Li
- Jilin University School of Life Sciences CHINA
| | - Greg G. Qiao
- University of Melbourne Department of Chemical Engineering AUSTRALIA
| | - Zesheng An
- Jilin University State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry 2699 Qianjin Street, Changchun 130012, China 130012 Changchun CHINA
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9
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Li W, Hadjigol S, Mazo AR, Holden J, Lenzo J, Shirbin SJ, Barlow A, Shabani S, Huang T, Reynolds EC, Qiao GG, O'Brien-Simpson NM. Star-Peptide Polymers are Multi-Drug-Resistant Gram-Positive Bacteria Killers. ACS Appl Mater Interfaces 2022; 14:25025-25041. [PMID: 35500245 DOI: 10.1021/acsami.1c23734] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Antibiotic resistance in bacteria, especially Gram-positive bacteria like Staphylococcus aureus, is gaining considerable momentum worldwide and unless checked will pose a global health crisis. With few new antibiotics coming on the market, there is a need for novel antimicrobial materials that target and kill multi-drug-resistant (MDR) Gram-positive pathogens like methicillin-resistant Staphylococcus aureus (MRSA). In this study, using a novel mixed-bacteria antimicrobial assay, we show that the star-peptide polymers preferentially target and kill Gram-positive pathogens including MRSA. A major effect on the activity of the star-peptide polymer was structure, with an eight-armed structure inducing the greatest bactericidal activity. The different star-peptide polymer structures were found to induce different mechanisms of bacterial death both in vitro and in vivo. These results highlight the potential utility of peptide/polymers to fabricate materials for therapeutic development against MDR Gram-positive bacterial infections.
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Affiliation(s)
- Wenyi Li
- ACTV Research Group, Melbourne Dental School, Centre for Oral Health Research, Royal Dental Hospital and The Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Sara Hadjigol
- ACTV Research Group, Melbourne Dental School, Centre for Oral Health Research, Royal Dental Hospital and The Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Alicia Rasines Mazo
- Polymer Science Group, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - James Holden
- Melbourne Dental School, Centre for Oral Health Research, Royal Dental Hospital and The Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jason Lenzo
- Melbourne Dental School, Centre for Oral Health Research, Royal Dental Hospital and The Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Steven J Shirbin
- Polymer Science Group, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Anders Barlow
- Materials Characterisation and Fabrication Platform, Melbourne School of Engineering, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Sadegh Shabani
- Polymer Science Group, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Tao Huang
- Department of Biomedical Engineering, Melbourne School of Engineering, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Eric C Reynolds
- Melbourne Dental School, Centre for Oral Health Research, Royal Dental Hospital and The Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical & Biomolecular Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Neil M O'Brien-Simpson
- ACTV Research Group, Melbourne Dental School, Centre for Oral Health Research, Royal Dental Hospital and The Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Parkville, Victoria 3010, Australia
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10
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Chan NJ, Lentz S, Gurr PA, Scheibel T, Qiao GG. Mimicry of silk utilizing synthetic polypeptides. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Qiu W, Scofield JMP, Gurr PA, Qiao GG. Mechanochromophore-linked Polymeric Materials with Visible Color Changes. Macromol Rapid Commun 2022; 43:e2100866. [PMID: 35338794 DOI: 10.1002/marc.202100866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/19/2022] [Indexed: 11/07/2022]
Abstract
Mechanical force as a type of stimuli for smart materials has obtained much attention in the past decade. Color-changing materials in response to mechanical stimuli have shown great potential in the applications such as sensors and displays. Mechanochromophore-linked polymeric materials, which are a growing sub-class of these materials, are discussed in detail in this review. Two main types of mechanochromophores which exhibit visible color change, summarized herein, involve either isomerization or radical generation mechanisms. This review focuses on their synthesis and incorporation into polymer matrices, the type of mechanical force used, factors affecting the mechanochromic properties, and their applications. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Wenlian Qiu
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Joel M P Scofield
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Paul A Gurr
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria, 3010, Australia
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12
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13
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Chan NJ, Lentz S, Gurr PA, Tan S, Scheibel T, Qiao GG. Vernetzte Polypeptide durch RAFT‐vermittelte Polymerisation zum kontinuierlichen Aufbau von Polymerfilmen. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nicholas J. Chan
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville, Melbourne Victoria 3010 Australien
- Lehrstuhl Biomaterialien Universität Bayreuth Prof.-Rüdiger-Bormann-Str. 1 95447 Bayreuth Deutschland
| | - Sarah Lentz
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville, Melbourne Victoria 3010 Australien
- Lehrstuhl Biomaterialien Universität Bayreuth Prof.-Rüdiger-Bormann-Str. 1 95447 Bayreuth Deutschland
| | - Paul A. Gurr
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville, Melbourne Victoria 3010 Australien
| | - Shereen Tan
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville, Melbourne Victoria 3010 Australien
| | - Thomas Scheibel
- Lehrstuhl Biomaterialien Universität Bayreuth Prof.-Rüdiger-Bormann-Str. 1 95447 Bayreuth Deutschland
| | - Greg G. Qiao
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville, Melbourne Victoria 3010 Australien
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14
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Padmakumar AK, Santha Kumar ARS, Allison-Logan S, Ashokkumar M, Singha NK, Qiao GG. High chain-end fidelity in sono-RAFT polymerization. Polym Chem 2022. [DOI: 10.1039/d2py00982j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study presents the preparation of well-defined multi-block copolymers and understanding of the chain-end fidelity of polymers prepared via sono-RAFT technique.
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Affiliation(s)
- Amrish Kumar Padmakumar
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | - Arunjunai R. S. Santha Kumar
- School of Chemistry, The University of Melbourne, Parkville 3010, Australia
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
| | - Stephanie Allison-Logan
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | | | - Nikhil K. Singha
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
| | - Greg G. Qiao
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
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15
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Chan NJA, Lentz S, Gurr PA, Tan S, Scheibel T, Qiao GG. Crosslinked polypeptide films via RAFT mediated continuous assembly of polymers. Angew Chem Int Ed Engl 2021; 61:e202112842. [PMID: 34861079 PMCID: PMC9305155 DOI: 10.1002/anie.202112842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Indexed: 11/08/2022]
Abstract
Polypeptide coatings are a cornerstone in the field of surface modification due to their widespread biological potential. As their properties are dictated by their structural features, subsequent control thereof using unique fabrication strategies is important. Herein, we report a facile method of precisely creating densely crosslinked polypeptide films with unusually high random coil conformations through continuous assembly polymerization via reversible addition-fragmentation chain transfer (CAP-RAFT). CAP-RAFT was fundamentally investigated using methacrylated poly- L -lysine (PLLMA) and methacrylated poly- L -glutamic acid (PLGMA). Careful technique refinement resulted in films up to 36.1 ± 1.1 nm thick which could be increased to 94.9 ± 8.2 nm after using this strategy multiple times. PLLMA and PLGMA films were found to have 30-50% random coil conformations. Degradation by enzymes present during wound healing reveals potential for applications in drug delivery and tissue engineering.
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Affiliation(s)
- Nicholas Jun-An Chan
- The University of Melbourne, Chemical and Biomolecular Engineering, 154 Masson Rd, Chemistry Building East Wing, 3052, Parkville, AUSTRALIA
| | - Sarah Lentz
- Universität Bayreuth: Universitat Bayreuth, Biomaterialien, Prof.-Rüdiger-Bormann-Str. 1, 95447, Bayreuth, GERMANY
| | - Paul Andrew Gurr
- The University of Melbourne, Chemical and Biomolecular Engineering, 154 Masson Rd, Chemistry Building East Wing, 3052, Parkville, AUSTRALIA
| | - Shereen Tan
- The University of Melbourne, Chemical and Biomolecular Engineering, 154 Masson Rd, Chemistry Building East Wing, 3052, Parkville, AUSTRALIA
| | - Thomas Scheibel
- Universität Bayreuth: Universitat Bayreuth, Biomaterials, Prof.-Rüdiger-Bormann-Str. 1, 95447, Bayreuth, GERMANY
| | - Greg G Qiao
- The University of Melbourne, Department of Chemical and Biomolecular Engineering, The University of Melbourne, 3010, Melbourne, AUSTRALIA
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16
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Weiss ACG, Shirbin SJ, Kelly HG, Besford QA, Kent SJ, Qiao GG. Plasma Corona Protects Human Immune Cells from Structurally Nanoengineered Antimicrobial Peptide Polymers. ACS Appl Mater Interfaces 2021; 13:33821-33829. [PMID: 34254515 DOI: 10.1021/acsami.1c07088] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Safe and effective antimicrobials are needed to combat emerging antibiotic-resistant bacteria. Structurally nanoengineered antimicrobial peptide polymers (termed SNAPPs) interact with bacterial cell membranes to potently kill bacteria but may also interact at some level with human cell membranes. We studied the association of four different SNAPPs with six different white blood cells within fresh whole human blood by flow cytometry. In whole human blood, SNAPPs had detectable association with phagocytic cells and B cells, but not natural killer and T cells. However, without plasma proteins and therefore no protein corona on the SNAPPs, a greater marked association of SNAPPs with all white blood cell types was detected, resulting in cytotoxicity against most blood cell components. Thus, the formation of a protein corona around the SNAPPs reduced the association and prevented human blood cell cytotoxicity of the SNAPPs. Understanding the bio-nano interactions of these SNAPPs will be crucial to ensuring that the design of next-generation SNAPPs and other promising antimicrobial nanomaterials continues to display high efficacy toward antibiotic-resistant bacteria while maintaining a low toxicity to primary human cells.
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Affiliation(s)
- Alessia C G Weiss
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Melbourne, Parkville, Victoria 3010, Australia
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Steven J Shirbin
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Hannah G Kelly
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Melbourne, Parkville, Victoria 3010, Australia
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Quinn A Besford
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Stephen J Kent
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Melbourne, Parkville, Victoria 3010, Australia
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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17
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Liu M, Xie K, Nothling MD, Zu L, Zhao S, Harvie DJ, Fu Q, Webley PA, Qiao GG. Ultrapermeable Composite Membranes Enhanced Via Doping with Amorphous MOF Nanosheets. ACS Cent Sci 2021; 7:671-680. [PMID: 34056097 PMCID: PMC8155479 DOI: 10.1021/acscentsci.0c01711] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Indexed: 06/12/2023]
Abstract
Thin-film composite (TFC) polymeric membranes have attracted increasing interest to meet the demands of industrial gas separation. However, the development of high-performance TFC membranes within their current configuration faces two key challenges: (i) the thickness-dependent gas permeability of polymeric materials (mainly poly(dimethylsiloxane) (PDMS)) and (ii) the geometric restriction effect due to the limited pore accessibility of the underlying porous substrate. Here we demonstrate that the incorporation of trace amounts (∼1.8 wt %) of amorphous metal-organic framework (MOF) nanosheets into the gutter layer of TFC assemblies can simultaneously address these two limitations by the creation of rapid, transmembrane gas diffusion pathways. The resultant PDMS&MOF membrane displayed excellent CO2 permeance of 10450 GPU and CO2/N2 selectivity of 9.1. Leveraging this strategy, we successfully fabricate a novel TFC membrane, consisting of a PDMS&MOF gutter and an ultrathin (∼54 nm) poly(ethylene glycol) top selective layer via surface-initiated atom transfer radical polymerization. The complete TFC membrane exhibits excellent processability and remarkable CO2/N2 separation performance (1990 GPU with a CO2/N2 ideal selectivity of 39). This study reveals a strategy for the design and fabrication of a new TFC membrane system with unprecedented gas-separation performance.
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Affiliation(s)
- Min Liu
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
| | - Ke Xie
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
| | - Mitchell D. Nothling
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
| | - Lianhai Zu
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
| | - Shenlong Zhao
- School
of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia
| | - Dalton J.E. Harvie
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
| | - Qiang Fu
- School
of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Paul A. Webley
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
- Department
of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, VIC 3800, Australia
| | - Greg G. Qiao
- Department
of Chemical Engineering, The University
of Melbourne, Parkville, VIC 3010, Australia
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18
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Nothling MD, Cao H, McKenzie TG, Hocking DM, Strugnell RA, Qiao GG. Bacterial Redox Potential Powers Controlled Radical Polymerization. J Am Chem Soc 2021; 143:286-293. [PMID: 33373526 DOI: 10.1021/jacs.0c10673] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Microbes employ a remarkably intricate electron transport system to extract energy from the environment. The respiratory cascade of bacteria culminates in the terminal transfer of electrons onto higher redox potential acceptors in the extracellular space. This general and inducible mechanism of electron efflux during normal bacterial proliferation leads to a characteristic fall in bulk redox potential (Eh), the degree of which is dependent on growth phase, the microbial taxa, and their physiology. Here, we show that the general reducing power of bacteria can be subverted to induce the abiotic production of a carbon-centered radical species for targeted bioorthogonal molecular synthesis. Using two species, Escherichia coli and Salmonella enterica serovar Typhimurium as model microbes, a common redox active aryldiazonium salt is employed to intervene in the terminal respiratory electron flow, affording radical production that is mediated by native redox-active molecular shuttles and active bacterial metabolism. The aryl radicals are harnessed to initiate and sustain a bioorthogonal controlled radical polymerization via reversible addition-fragmentation chain transfer (BacRAFT), yielding a synthetic extracellular matrix of "living" vinyl polymers with predetermined molecular weight and low dispersity. The ability to interface the ubiquitous reducing power of bacteria into synthetic materials design offers a new means for creating engineered living materials with promising adaptive and self-regenerative capabilities.
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Affiliation(s)
- Mitchell D Nothling
- Department of Chemical Engineering, University of Melbourne, Melbourne, VIC 3010, Australia
| | - Hanwei Cao
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Thomas G McKenzie
- Department of Chemical Engineering, University of Melbourne, Melbourne, VIC 3010, Australia
| | - Dianna M Hocking
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Richard A Strugnell
- Department of Microbiology and Immunology, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC 3000, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, University of Melbourne, Melbourne, VIC 3010, Australia
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19
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Nothling MD, Fu Q, Reyhani A, Allison‐Logan S, Jung K, Zhu J, Kamigaito M, Boyer C, Qiao GG. Progress and Perspectives Beyond Traditional RAFT Polymerization. Adv Sci (Weinh) 2020; 7:2001656. [PMID: 33101866 PMCID: PMC7578854 DOI: 10.1002/advs.202001656] [Citation(s) in RCA: 97] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/17/2020] [Indexed: 05/09/2023]
Abstract
The development of advanced materials based on well-defined polymeric architectures is proving to be a highly prosperous research direction across both industry and academia. Controlled radical polymerization techniques are receiving unprecedented attention, with reversible-deactivation chain growth procedures now routinely leveraged to prepare exquisitely precise polymer products. Reversible addition-fragmentation chain transfer (RAFT) polymerization is a powerful protocol within this domain, where the unique chemistry of thiocarbonylthio (TCT) compounds can be harnessed to control radical chain growth of vinyl polymers. With the intense recent focus on RAFT, new strategies for initiation and external control have emerged that are paving the way for preparing well-defined polymers for demanding applications. In this work, the cutting-edge innovations in RAFT that are opening up this technique to a broader suite of materials researchers are explored. Emerging strategies for activating TCTs are surveyed, which are providing access into traditionally challenging environments for reversible-deactivation radical polymerization. The latest advances and future perspectives in applying RAFT-derived polymers are also shared, with the goal to convey the rich potential of RAFT for an ever-expanding range of high-performance applications.
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Affiliation(s)
- Mitchell D. Nothling
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Qiang Fu
- Centre for Technology in Water and Wastewater Treatment (CTWW)School of Civil and Environmental EngineeringUniversity of Technology SydneyUltimoNSW2007Australia
| | - Amin Reyhani
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Stephanie Allison‐Logan
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
| | - Kenward Jung
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringUNWSSydneyNSW2052Australia
| | - Jian Zhu
- College of ChemistryChemical Engineering and Material ScienceDepartment of Polymer Science and EngineeringSoochow UniversitySuzhou215123China
| | - Masami Kamigaito
- Department of Molecular and Macromolecular ChemistryGraduate School of EngineeringNagoya UniversityFuro‐cho, Chikusa‐kuNagoya464‐8603Japan
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN)School of Chemical EngineeringUNWSSydneyNSW2052Australia
| | - Greg G. Qiao
- Polymer Science GroupDepartment of Chemical EngineeringThe University of MelbourneParkvilleVIC3010Australia
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20
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Abstract
Color changing food spoilage sensors for protein-based food products, such as fish and beef, are mostly based on the halochromic behavior of pH indicators. However, due to their reversible halochromic nature, these sensors can be manipulated by chemical treatment, hiding the true history and quality of deteriorated meat. Therefore, there is a need to create an irreversible and reliable food spoilage sensor, which clearly indicates to consumers if any food degradation or improper storage has occurred, and avoid nefarious food processing companies from disguising spoiled meat as fresh meat. Here, a simple, irreversible, and halochromic sensor showing spoilage of seafood and meat products is developed. Specifically, chlorophenol red (CPR)-fatty acid particles are dispersed within an ammonia-permeable polymer matrix to form a nontoxic film sensor that shows obvious halochromic behavior toward bioamine or total volatile basic nitrogen (TVB-N) given off by deteriorated seafood or meat products. After the removal of TVB-N, this sensor does not revert back to its original color due to a loss of π-π stacking of the original sulfonephthalein molecules. These features make this sensor applicable as a novel and reliable spoilage sensor for protein-based food products.
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Affiliation(s)
- Bingxin Liu
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Paul A. Gurr
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Greg G. Qiao
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
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21
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Allison‐Logan S, Fu Q, Sun Y, Liu M, Xie J, Tang J, Qiao GG. From UV to NIR: A Full‐Spectrum Metal‐Free Photocatalyst for Efficient Polymer Synthesis in Aqueous Conditions. Angew Chem Int Ed Engl 2020; 59:21392-21396. [DOI: 10.1002/anie.202007196] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/20/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Stephanie Allison‐Logan
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
| | - Qiang Fu
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
- Centre for Technology in Water and Wastewater (CTWW) School of Civil and Environmental Engineering University of Technology Sydney Ultimo NSW 2007 Australia
| | - Yongkang Sun
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
| | - Min Liu
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
| | - Jijia Xie
- Solar Energy & Advanced Materials Research Group Department of Chemical Engineering University College London Torrington Place London WC1E JE UK
| | - Junwang Tang
- Solar Energy & Advanced Materials Research Group Department of Chemical Engineering University College London Torrington Place London WC1E JE UK
| | - Greg G. Qiao
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
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22
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Allison‐Logan S, Fu Q, Sun Y, Liu M, Xie J, Tang J, Qiao GG. From UV to NIR: A Full‐Spectrum Metal‐Free Photocatalyst for Efficient Polymer Synthesis in Aqueous Conditions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007196] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Stephanie Allison‐Logan
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
| | - Qiang Fu
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
- Centre for Technology in Water and Wastewater (CTWW) School of Civil and Environmental Engineering University of Technology Sydney Ultimo NSW 2007 Australia
| | - Yongkang Sun
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
| | - Min Liu
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
| | - Jijia Xie
- Solar Energy & Advanced Materials Research Group Department of Chemical Engineering University College London Torrington Place London WC1E JE UK
| | - Junwang Tang
- Solar Energy & Advanced Materials Research Group Department of Chemical Engineering University College London Torrington Place London WC1E JE UK
| | - Greg G. Qiao
- Polymer Science Group Department of Chemical Engineering University of Melbourne Parkville VIC 3010 Australia
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23
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Karimi F, Thombare VJ, Hutton CA, O'Connor AJ, Qiao GG, Heath DE. Biomaterials functionalized with nanoclusters of integrin- and syndecan-binding ligands improve cell adhesion and mechanosensing under shear flow conditions. J Biomed Mater Res A 2020; 109:313-325. [PMID: 32490581 DOI: 10.1002/jbm.a.37024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 04/20/2020] [Accepted: 04/27/2020] [Indexed: 12/11/2022]
Abstract
We have engineered biomaterials that display nanoclusters of ligands that bind both integrin and syndecan-4 cell receptors. These surfaces regulate cell behaviors under static conditions including adhesion, spreading, actin stress fiber formation, and migration. The syndecan-4 receptors are also critical mediators of cellular mechanotransduction. In this contribution we assess whether this novel class of materials can regulate the response of cells to applied mechanical stimulation, using the shear stress imparted by laminar fluid flow as a model stimulus. Specifically, we assess endothelial cell detachment due to flow, cell alignment due to flow, and cell adhesion from the flowing fluid. A high degree of cell retention was observed on surfaces containing integrin-binding ligands or a mixed population of integrin- and syndecan-binding ligands. However, the presence of both ligand types was necessary for the cells to align in the direction of flow. These results imply that integrin engagement is necessary for adhesion strength, but engagement of both receptor types aids in appropriate mechanotransduction. Additionally, it was found that surfaces functionalized with both ligand types were able to scavenge a larger number of cells from flow, and to do so at a faster rate, compared to surfaces functionalized with only integrin- or syndecan-binding ligands. These results show that interfaces functionalized with both integrin- and syndecan-binding ligands regulate a significant range of biophysical cell behaviors in response to shear stress.
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Affiliation(s)
- Fatemeh Karimi
- Department of Biomedical Engineering, Particulate Fluids Processing Centre, University of Melbourne, Parkville, Victoria, Australia.,Polymer Science Group, Department of Chemical Engineering, Particulate Fluid Processing Centre, University of Melbourne, Parkville, Victoria, Australia.,Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Varsha Jagannath Thombare
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Victoria, Australia
| | - Craig A Hutton
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Victoria, Australia
| | - Andrea J O'Connor
- Department of Biomedical Engineering, Particulate Fluids Processing Centre, University of Melbourne, Parkville, Victoria, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering, Particulate Fluid Processing Centre, University of Melbourne, Parkville, Victoria, Australia
| | - Daniel E Heath
- Department of Biomedical Engineering, Particulate Fluids Processing Centre, University of Melbourne, Parkville, Victoria, Australia
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24
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Affiliation(s)
- Wenlian Qiu
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Paul A. Gurr
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Greg G. Qiao
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
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25
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Pattison TG, Hess AE, Arellano N, Lanzillo N, Nguyen S, Bui H, Rettner C, Truong H, Friz A, Topuria T, Fong A, Hughes B, Tek AT, DeSilva A, Miller RD, Qiao GG, Wojtecki RJ. Surface Initiated Polymer Thin Films for the Area Selective Deposition and Etching of Metal Oxides. ACS Nano 2020; 14:4276-4288. [PMID: 32167284 DOI: 10.1021/acsnano.9b09637] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The area selective growth of polymers and their use as inhibiting layers for inorganic film depositions may provide a valuable self-aligned process for fabrication. Polynorbornene (PNB) thin films were grown from surface-bound initiators and show inhibitory properties against the atomic layer deposition (ALD) of ZnO and TiO2. Area selective control of the polymerization was achieved through the synthesis of initiators that incorporate surface-binding ligands, enabling their selective attachment to metal oxide features versus silicon dielectrics, which were then used to initiate surface polymerizations. The subsequent use of these films in an ALD process enabled the area selective deposition (ASD) of up to 39 nm of ZnO. In addition, polymer thickness was found to play a key role, where films that underwent longer polymerization times were more effective at inhibiting higher numbers of ALD cycles. Finally, while the ASD of a TiO2 film was not achieved despite blanket studies showing inhibition, the ALD deposition on polymer regions of a patterned film produced a different quality metal oxide and therefore altered its etch resistance. This property was exploited in the area selective etch of a metal feature. This demonstration of an area selective surface-grown polymer to enable ASD and selective etch has implications for the fabrication of both micro- and nanoscale features and surfaces.
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Affiliation(s)
- Thomas G Pattison
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Alexander E Hess
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Noel Arellano
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Nicholas Lanzillo
- IBM Research at Albany Nanotech, 257 Fuller Road, Albany, New York 12203, United States
| | - Son Nguyen
- International Business Machines - Semiconductor Technology Research, 257 Fuller Road, Albany, New York 12203, United States
| | - Holt Bui
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Charles Rettner
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Hoa Truong
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Alexander Friz
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Teya Topuria
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Anthony Fong
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Brian Hughes
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Andy T Tek
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Anuja DeSilva
- International Business Machines - Semiconductor Technology Research, 257 Fuller Road, Albany, New York 12203, United States
| | - Robert D Miller
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Rudy J Wojtecki
- International Business Machines - Almaden Research Center, 650 Harry Road, San Jose, California 95120, United States
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26
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Chan NJA, Gu D, Tan S, Fu Q, Pattison TG, O'Connor AJ, Qiao GG. Spider-silk inspired polymeric networks by harnessing the mechanical potential of β-sheets through network guided assembly. Nat Commun 2020; 11:1630. [PMID: 32242004 PMCID: PMC7118121 DOI: 10.1038/s41467-020-15312-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 02/24/2020] [Indexed: 12/26/2022] Open
Abstract
The high toughness of natural spider-silk is attributed to their unique β-sheet secondary structures. However, the preparation of mechanically strong β-sheet rich materials remains a significant challenge due to challenges involved in processing the polymers/proteins, and managing the assembly of the hydrophobic residues. Inspired by spider-silk, our approach effectively utilizes the superior mechanical toughness and stability afforded by localised β-sheet domains within an amorphous network. Using a grafting-from polymerisation approach within an amorphous hydrophilic network allows for spatially controlled growth of poly(valine) and poly(valine-r-glycine) as β-sheet forming polypeptides via N-carboxyanhydride ring opening polymerisation. The resulting continuous β-sheet nanocrystal network exhibits improved compressive strength and stiffness over the initial network lacking β-sheets of up to 30 MPa (300 times greater than the initial network) and 6 MPa (100 times greater than the initial network) respectively. The network demonstrates improved resistance to strong acid, base and protein denaturants over 28 days. It is known the β-sheet structures in silk-inspired materials generate increased mechanical properties. Here, the authors report on a method of creating silk-inspired materials using in situ formation of β-sheets in an amorphous polymer to replicate the structure of silk and increase the mechanical properties.
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Affiliation(s)
- Nicholas Jun-An Chan
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia
| | - Dunyin Gu
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia
| | - Shereen Tan
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia
| | - Qiang Fu
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia
| | - Thomas Geoffrey Pattison
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia
| | - Andrea J O'Connor
- Department of Biomedical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville, Melbourne, VIC, 3010, Australia.
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27
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Abstract
Thermochromic materials exhibit a color change in response to a change in temperature. Creating nontoxic microcapsules containing thermochromic materials for applications in ink and film materials is historically challenging. In this study, we develop a nontoxic chlorophenol red (CPR)-water thermochromic system and its microcapsules with silicone shells via a reaction between water and octadecyltrichlorosilane (OTS) at the interface of a w/o emulsion. The obtained microcapsules exhibit a clear color change with full reversibility and are successfully used as inks by screen printing and as additives in films. Nontoxicity of both microcapsules and films is demonstrated through cell cytotoxicity assays. These features make these novel materials applicable to the next generation of intelligent sensors, coating, and food packaging materials.
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Affiliation(s)
- Bingxin Liu
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , VIC 3010 , Australia
| | - Alicia Rasines Mazo
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , VIC 3010 , Australia
| | - Paul A Gurr
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , VIC 3010 , Australia
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , VIC 3010 , Australia
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28
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Guo Y, Karimi F, Fu Q, G Qiao G, Zhang H. Reduced administration frequency for the treatment of fungal keratitis: a sustained natamycin release from a micellar solution. Expert Opin Drug Deliv 2020; 17:407-421. [PMID: 32009483 DOI: 10.1080/17425247.2020.1719995] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Background: Natamycin is the only topical ophthalmic antifungal drug approved by the Food and Drug Administration (FDA) of the United States, but has unsatisfactory factors such as high dosing frequency.Methods: We report the synthesis and preparation of self-assembled poly(ethylene glycol)-block-poly(glycidyl methacrylate) (PEG-b-PGMA) micelles. These nanoparticles exhibit sustained delivery of a hydrophobic natamycin by topical administration on eye due to the hydrolysable properties of PGMA segments of micelle. Hydrolysis of glycidyl groups within a physiologically relevant environment provides an additional driving force for drug release by generation of hydrophilic hydroxyl groups to 'push' the encapsulated hydrophobic drug away from the resultant hydrophilic domains and into surrounding environment.Results: In vitro and in vivo results revealed that the self-assembled micelles and the encapsulated natamycin were not cytotoxic and the released drug have strong antifungal ability to Candida albicans. Importantly, sustained natamycin release from micelles leads to the reduced administration frequency of natamycin from 8 times per day to 3 times per day in rabbits suffering from fungal keratitis (FK).Conclusion: This study demonstrates a facile method that can greatly reduce dosing frequency of natamycin administration and thus improve long-term patient compliance.
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Affiliation(s)
- Yiyuan Guo
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, Peoples Republic of China.,Department of Chemical Engineering, The University of Melbourne, Melbourne, Australia
| | - Fatemeh Karimi
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Australia.,Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia
| | - Qiang Fu
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Australia.,The Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, Australia
| | - Greg G Qiao
- Department of Chemical Engineering, The University of Melbourne, Melbourne, Australia
| | - Hong Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, Peoples Republic of China
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29
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Dokouhaki M, Prime EL, Qiao GG, Kasapis S, Day L, Gras SL. Structural-rheological characteristics of Chaplin E peptide at the air/water interface; a comparison with β-lactoglobulin and β-casein. Int J Biol Macromol 2020; 144:742-750. [PMID: 31837361 DOI: 10.1016/j.ijbiomac.2019.12.075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 12/10/2019] [Accepted: 12/10/2019] [Indexed: 11/27/2022]
Abstract
The Chaplin E peptide is a surface-active agent that can adsorb to the air/water interface and form interfacial films that display distinct interfacial properties as a function of pH. The ~2 nm thick homogeneous Chaplin E film formed under acidic conditions contains ordered structures that give a high dilatational elasticity. In contrast, the heterogeneous film formed under basic conditions contained fibrils resulting in a rough ~17 nm thick film with predominantly viscoelastic properties, probably due to the reduced intermolecular interactions. These fibrils were also susceptible to breakage, fragmenting into shorter fibrils, which gave a greater elasticity. The fibrils also lead to a greater shear viscosity compared to the ordered structures aligned within the Chaplin E film at pH 3.0. A higher stability was observed for the foam formed by the Chaplin E compared to the foam formed by β-lactoglobulin, consistent with the greater rheological properties observed for the Chaplin E film at the interface. Our findings suggest that Chaplin E has potential to provide long time stability to dispersions in food, consumer goods or pharmaceutical applications, forming films with greater rheological properties and at least similar thickness to those formed by other surface-active proteins such as β-casein and β-lactoglobulin.
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Affiliation(s)
- Mina Dokouhaki
- School of Science, RMIT University, Bundoora West Campus, VIC 3083, Australia.
| | - Emma L Prime
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia
| | - Greg G Qiao
- The Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Stefan Kasapis
- School of Science, RMIT University, Bundoora West Campus, VIC 3083, Australia
| | - Li Day
- AgResearch Ltd., Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand
| | - Sally L Gras
- The Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia; The Bio21 Molecular Science and Biotechnology Institute and The ARC Dairy Innovation Hub, The University of Melbourne, Parkville, Vic 3010, Australia.
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30
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Pattison TG, Spanu A, Friz AM, Fu Q, Miller RD, Qiao GG. Growing Patterned, Cross-linked Nanoscale Polymer Films from Organic and Inorganic Surfaces Using Ring-Opening Metathesis Polymerization. ACS Appl Mater Interfaces 2020; 12:4041-4051. [PMID: 31741381 DOI: 10.1021/acsami.9b15852] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The ability to modify substrates with thin polymer films allows for the tailoring of surface properties, and through combination of patterning finds use in a large variety of applications such as electronics and lab-on-chip devices. Although many techniques can be used to afford polymer-modified surfaces such as surface-initiated polymerization or layer-by-layer methodologies, their stability in a wide range of environments as well as their ability to target specific chemistry are critical factors to enable their successful application. In this paper, we report a facile technique in creating nanoscale polymer thin films using solid-state continuous assembly of polymers via ring-opening metathesis polymerization (ssCAPROMP) directly from surfaces functionalized through silanization. Using a polymeric precursor that includes norbornene moieties, a highly dense cross-linked network of polymer can be grown in a bottom-up fashion to afford thin films from an olefin-terminated silanized planar surface. Such nanotechnology affords films retaining the desirable qualities of previously reported methods while, at the same time, being covalently bound to the substrate: they are virtually pinhole free and can be reinitiated multiple times. By combining this process with microcontact printing, patterned films can be created by either the patterned deposition of a catalyst or by controlling the surface silanization chemistry and placement of olefin-terminated and nonreactive silanes. Additionally, patterned ssCAPROMP films were grown from SU-8 by selectively functionalizing the surface through masking and lift-off processes after the silanization step, thereby spatially controlling the surface-initiation, and subsequent polymer film formation. These patterned films expand the capabilities of the CAPROMP process and offer advantages over other film formation techniques in processes where patterned substrates and modified but robust surface chemistries are utilized.
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Affiliation(s)
- Thomas G Pattison
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
- International Business Machines-Almaden Research Center , 650 Harry Road , San Jose , California 95110 , United States
| | - Andrea Spanu
- Department of Electrical and Electronic Engineering , University of Cagliari , via Marengo , 09123 Cagliari , Italy
| | - Alexander M Friz
- International Business Machines-Almaden Research Center , 650 Harry Road , San Jose , California 95110 , United States
| | - Qiang Fu
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
- The Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering , University of Technology Sydney , Ultimo , NSW 2007 Australia
| | - Robert D Miller
- International Business Machines-Almaden Research Center , 650 Harry Road , San Jose , California 95110 , United States
| | - Greg G Qiao
- Polymer Science Group, Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
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31
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Rasines Mazo A, Allison-Logan S, Karimi F, Chan NJA, Qiu W, Duan W, O’Brien-Simpson NM, Qiao GG. Ring opening polymerization of α-amino acids: advances in synthesis, architecture and applications of polypeptides and their hybrids. Chem Soc Rev 2020; 49:4737-4834. [DOI: 10.1039/c9cs00738e] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This review provides a comprehensive overview of the latest advances in the synthesis, architectural design and biomedical applications of polypeptides and their hybrids.
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Affiliation(s)
- Alicia Rasines Mazo
- Polymer Science Group
- Department of Chemical Engineering
- University of Melbourne
- Parkville
- Australia
| | - Stephanie Allison-Logan
- Polymer Science Group
- Department of Chemical Engineering
- University of Melbourne
- Parkville
- Australia
| | - Fatemeh Karimi
- Polymer Science Group
- Department of Chemical Engineering
- University of Melbourne
- Parkville
- Australia
| | - Nicholas Jun-An Chan
- Polymer Science Group
- Department of Chemical Engineering
- University of Melbourne
- Parkville
- Australia
| | - Wenlian Qiu
- Polymer Science Group
- Department of Chemical Engineering
- University of Melbourne
- Parkville
- Australia
| | - Wei Duan
- School of Medicine
- Deakin University
- Geelong
- Australia
| | - Neil M. O’Brien-Simpson
- Centre for Oral Health Research
- Melbourne Dental School and the Bio21 Institute of Molecular Science and Biotechnology
- University of Melbourne
- Parkville
- Australia
| | - Greg G. Qiao
- Polymer Science Group
- Department of Chemical Engineering
- University of Melbourne
- Parkville
- Australia
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32
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Rasines Mazo A, Tran TN, Zhang W, Meng Y, Reyhani A, Pascual S, Fontaine L, Qiao GG, Piogé S. Blue LED light-activated RAFT polymerization of PEG acrylate with high chain-end fidelity for efficient PEGylation. Polym Chem 2020. [DOI: 10.1039/d0py00838a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Well-defined PPEGAs with high chain-end fidelity are synthesized through blue LED light-initiated RAFT, with their efficient PEGylation potential highlighted.
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Affiliation(s)
- Alicia Rasines Mazo
- Polymer Science Group
- The University of Melbourne
- Department of Chemical Engineering
- Parkville 3010
- Australia
| | - Thi Nga Tran
- Institut des Molécules et Matériaux du Mans
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Wenhao Zhang
- Institut des Molécules et Matériaux du Mans
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Yuwen Meng
- Institut des Molécules et Matériaux du Mans
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Amin Reyhani
- Polymer Science Group
- The University of Melbourne
- Department of Chemical Engineering
- Parkville 3010
- Australia
| | - Sagrario Pascual
- Institut des Molécules et Matériaux du Mans
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Laurent Fontaine
- Institut des Molécules et Matériaux du Mans
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
| | - Greg G. Qiao
- Polymer Science Group
- The University of Melbourne
- Department of Chemical Engineering
- Parkville 3010
- Australia
| | - Sandie Piogé
- Institut des Molécules et Matériaux du Mans
- UMR 6283 CNRS – Le Mans Université
- 72085 Le Mans Cedex 9
- France
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Allison-Logan S, Karimi F, Sun Y, McKenzie TG, Nothling MD, Bryant G, Qiao GG. Highly Living Stars via Core-First Photo-RAFT Polymerization: Exploitation for Ultra-High Molecular Weight Star Synthesis. ACS Macro Lett 2019; 8:1291-1295. [PMID: 35651148 DOI: 10.1021/acsmacrolett.9b00643] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Star polymers are highly functional materials that display unique properties in comparison to linear polymers, making them valuable in a wide range of applications. Currently, ultra-high molecular weight (UHMW) star polymers synthesized using controlled radical polymerization are prone to termination reactions that have undesirable effects, such as star-star coupling. Herein, we report the synthesis of the largest star polymers to date using controlled radical techniques via xanthate-mediated photo-reversible addition-fragmentation chain transfer (RAFT) polymerization using a core-first approach. Polymerization from xanthate-functionalized cores was highly living, enabling the synthesis of well-defined star polymers with molecular weights in excess of 20 MDa.
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Affiliation(s)
- Stephanie Allison-Logan
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | - Fatemeh Karimi
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | - Yongkang Sun
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | - Thomas G. McKenzie
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | - Mitchell D. Nothling
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
| | - Gary Bryant
- Centre for Molecular and Nanoscale Physics, School of Science, RMIT University, Melbourne 3001, Australia
| | - Greg G. Qiao
- Polymer Science Group, Department of Chemical Engineering, University of Melbourne, Parkville 3010, Australia
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34
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Abstract
Spiropyran is an important mechanophore, which has rarely been incorporated as a cross-linker in polar polymer matrices, limiting its applications in innovative mechanochromic devices. Here, three spiropyrans with two- or three-attachment positions were synthesized and covalently bonded in polar poly(hydroxyethyl acrylate) (PHEA), to achieve color-switchable materials, triggered by light and when swollen in water. The negative photochromism in the dark and mechanical activation by swelling in water were investigated. Measurements of negative photochromism were conducted in solution and cross-linked PHEA bulk polymers, with both showing color reversibility when stored in the dark or on exposure to visible light. The force of swelling in water was sufficient to induce the ring-opening reaction of spiropyran. It was found that tri-substituted spiropyran (SP3) was less influenced by the polar matrix but showed the fastest color activation during swelling. SP3 also showed accelerated ring opening to the colored state during the swelling process. Bleaching rates and color switchability were investigated under swollen and dehydrated conditions. The effect of cross-link density on the swelling activation was explored to better understand the interaction between the mechanophore and the polar environment. The results demonstrated that influences from both the polar environment and the mechanochromic nature of spiropyran had an impact on the absorption intensity, rate of change, and the decoloration rate of the materials. This study provides the opportunity to manipulate the properties of spiropyrans to afford materials with a range of color-switching properties under different stimuli.
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Affiliation(s)
- Wenlian Qiu
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Paul A Gurr
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Greg G Qiao
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
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35
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Abstract
Climate change due to anthropogenic carbon dioxide emissions (e.g., combustion of fossil fuels) represents one of the most profound environmental disasters of this century. Equipping power plants with carbon capture and storage (CCS) technology has the potential to reduce current worldwide CO2 emissions. However, existing CCS schemes (i.e., amine scrubbing) are highly energy-intensive. The urgent abatement of CO2 emissions relies on the development of new, efficient technologies to capture CO2 from existing power plants. Membrane-based CO2 separation is an attractive technology that meets many of the requirements for energy-efficient industrial carbon capture. Within this domain, thin-film composite (TFC) membranes are particularly attractive, providing high gas permeance in comparison with conventional thicker (∼50 μm) dense membranes. TFC membranes are usually composed of three layers: (1) a bottom porous support layer; (2) a highly permeable intermediate gutter layer; and (3) a thin (<1 μm) species-selective top layer. A key challenge in the development of TFC membranes has been to simultaneously maximize the transmembrane gas permeance of the assembled membrane (by minimizing the gas resistance of each layer) while maintaining high gas-specific selectivity. In this Account, we provide an overview of our recent development of high-performance TFC membrane materials as well as insights into the unique fabrication strategies employed for the selective layer and gutter layer. Optimization of each layer of the membrane assembly individually results in significant improvements in overall membrane performance. First, incorporating nanosized fillers into the selective layer (poly(ethylene glycol)-based polymers) and reducing its thickness (to ca. 50 nm) through continuous assembly of polymers technology yields major improvements in CO2 permeance without loss of selectivity. Second, we focus on optimization of the middle gutter layer of TFC membranes. The development of enhanced gutter layers employing two- and three-dimensional metal-organic framework materials leads to considerable improvements in both CO2 permeance and selectivity compared with traditional poly(dimethylsiloxane) materials. Third, incorporation of a porous, flexible support layer culminates in a mechanically robust high-performance TFC membrane design that exhibits unprecedented CO2 separation performance and holds significant potential for industrial CO2 capture. Alternative strategies are also emerging, whereby the selective layer and gutter layer may be combined for enhanced membrane efficiency. This Account highlights the CO2 capture performance, current challenges, and future research directions in designing high-performance TFC membranes.
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Affiliation(s)
- Min Liu
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Mitchell D. Nothling
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Paul A. Webley
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Qiang Fu
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
| | - Greg G. Qiao
- Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
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36
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Reyhani A, McKenzie TG, Fu Q, Qiao GG. Fenton‐Chemistry‐Mediated Radical Polymerization. Macromol Rapid Commun 2019; 40:e1900220. [DOI: 10.1002/marc.201900220] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 06/11/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Amin Reyhani
- Polymer Science Group, Department of Chemical EngineeringThe University of Melbourne Parkville VIC 3010 Australia
| | - Thomas G. McKenzie
- Polymer Science Group, Department of Chemical EngineeringThe University of Melbourne Parkville VIC 3010 Australia
| | - Qiang Fu
- Polymer Science Group, Department of Chemical EngineeringThe University of Melbourne Parkville VIC 3010 Australia
| | - Greg G. Qiao
- Polymer Science Group, Department of Chemical EngineeringThe University of Melbourne Parkville VIC 3010 Australia
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37
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Sulistio A, Mansfeld FM, Reyes-Ortega F, D’Souza AM, Ng SMY, Birkett S, Blencowe A, Qiao GG, Little CB, Shu CC, Bendele AM, Valade D, Donohue AC, Quinn JF, Whittaker MR, Davis TP, Tait RJ. Intra-articular Treatment of Osteoarthritis with Diclofenac-Conjugated Polymer Reduces Inflammation and Pain. ACS Appl Bio Mater 2019; 2:2822-2832. [DOI: 10.1021/acsabm.9b00232] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Adrian Sulistio
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
| | - Friederike M. Mansfeld
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- Children’s Cancer Institute, Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Felisa Reyes-Ortega
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
| | - Asha M. D’Souza
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Sarah M. Y. Ng
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Stephen Birkett
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Anton Blencowe
- School of Pharmacy and Medical Sciences, University of South Australia, Mawson Lake, South Australia 5095, Australia
| | - Greg G. Qiao
- Department of Chemical and Biomolecular Engineering, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Christopher B. Little
- Raymond Purves Bone and Joint Research Laboratories, Kolling Institute, University of Sydney at Royal North Shore Hospital, St Leonards, New South Wales 2065, Australia
| | - Cindy C. Shu
- Raymond Purves Bone and Joint Research Laboratories, Kolling Institute, University of Sydney at Royal North Shore Hospital, St Leonards, New South Wales 2065, Australia
| | - Alison M. Bendele
- Bolder BioPATH Inc.,5541 Central Avenue, Suite 160, Boulder, Colorado 80301, United States
| | - David Valade
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Andrew C. Donohue
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - John F. Quinn
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Michael R. Whittaker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
| | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St Lucia, Queensland, 4072, Australia
| | - Russell J. Tait
- PolyActiva Pty Ltd., Level 9, 31 Queen Street, Melbourne, Victoria 3000, Australia
- Monash Institute of Pharmaceutical Sciences, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Royal Parade, Parkville, Victoria 3052, Australia
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38
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Reyhani A, Ranji-Burachaloo H, McKenzie TG, Fu Q, Qiao GG. Heterogeneously Catalyzed Fenton-Reversible Addition–Fragmentation Chain Transfer Polymerization in the Presence of Air. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00038] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Amin Reyhani
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Hadi Ranji-Burachaloo
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Thomas G. McKenzie
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Qiang Fu
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
| | - Greg G. Qiao
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, Melbourne, Victoria 3010, Australia
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39
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McKenzie TG, Karimi F, Ashokkumar M, Qiao GG. Frontispiece: Ultrasound and Sonochemistry for Radical Polymerization: Sound Synthesis. Chemistry 2019. [DOI: 10.1002/chem.201982162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Thomas G. McKenzie
- Polymer Science Group, Department of Chemical and Biomolecular EngineeringThe University of Melbourne Melbourne 3010 Australia
| | - Fatemeh Karimi
- Polymer Science Group, Department of Chemical and Biomolecular EngineeringThe University of Melbourne Melbourne 3010 Australia
| | | | - Greg G. Qiao
- Polymer Science Group, Department of Chemical and Biomolecular EngineeringThe University of Melbourne Melbourne 3010 Australia
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40
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Ranji-Burachaloo H, Reyhani A, Gurr PA, Dunstan DE, Qiao GG. Combined Fenton and starvation therapies using hemoglobin and glucose oxidase. Nanoscale 2019; 11:5705-5716. [PMID: 30865742 DOI: 10.1039/c8nr09107b] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Separately, Fenton and starvation cancer therapies have been recently reported as impressive methods for tumor destruction. Here, we introduce natural hemoglobin and glucose oxidase (GOx) for efficient cancer treatment following combined Fenton and starvation therapies. GOx and hemoglobin were encapsulated in zeolitic imidazolate frameworks 8 (ZIF-8) to fabricate a pH-sensitive MOF activated by tumor acidity. In the slightly acidic environment of cancer cells, GOx is released and it consumes d-glucose and molecular oxygen, nutrients essential for the survival of cancer cells, and produces gluconic acid and hydrogen peroxide, respectively. The produced gluconic acid increases the acidity of the tumor microenvironment leading to complete MOF destruction and enhances hemoglobin and GOx release. The Fe ions from the heme groups of hemoglobin also release in the presence of both endogenous and produced H2O2 and generate hydroxyl radicals. The produced OH˙ radical can rapidly oxidize the surrounding biomacromolecules in the biological system and treat the cancer cells. In vitro experiments demonstrate that this novel nanoparticle is cytotoxic to cancer cells HeLa and MCF-7, at very low concentrations (<2 μg mL-1). In addition, the selectivity index values are 5.52 and 11.04 for HeLa and MCF-7 cells, respectively, which are much higher than those of commercial drugs and those of similar studies reported by other research groups. This work thus demonstrates a novel pH-sensitive system containing hemoglobin and GOx for effective and selective cancer treatment using both radical generation and nutrient starvation.
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Affiliation(s)
- Hadi Ranji-Burachaloo
- Polymer Science Group, Department of Chemical Engineering, The University of Melbourne, Parkville, VIC 3010, Australia.
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41
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Ren JM, Knight AS, van Ravensteijn BGP, Kohl P, Bou Zerdan R, Li Y, Lunn DJ, Abdilla A, Qiao GG, Hawker CJ. DNA-Inspired Strand-Exchange for Switchable PMMA-Based Supramolecular Morphologies. J Am Chem Soc 2019; 141:2630-2635. [PMID: 30721057 DOI: 10.1021/jacs.8b12964] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Inspired by nanotechnologies based on DNA strand displacement, herein we demonstrate that synthetic helical strand exchange can be achieved through tuning of poly(methyl methacrylate) (PMMA) triple-helix stereocomplexes. To evaluate the utility and robustness of helical strand exchange, stereoregular PMMA/polyethylene glycol (PEG) block copolymers capable of undergoing crystallization driven self-assembly via stereocomplex formation were prepared. Micelles with spherical or wormlike morphologies were formed by varying the molecular weight composition of the assembling components. Significantly, PMMA strand exchange was demonstrated and utilized to reversibly switch the micelles between different morphologies. This concept of strand exchange with PMMA-based triple-helix stereocomplexes offers new opportunities to program dynamic behaviors of polymeric materials, leading to scalable synthesis of "smart" nanosystems.
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Affiliation(s)
- Jing M Ren
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | | | | | | | | | | | | | | | - Greg G Qiao
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
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42
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43
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McKenzie TG, Karimi F, Ashokkumar M, Qiao GG. Ultrasound and Sonochemistry for Radical Polymerization: Sound Synthesis. Chemistry 2019; 25:5372-5388. [DOI: 10.1002/chem.201803771] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/22/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Thomas G. McKenzie
- Polymer Science Group, Department of Chemical and Biomolecular Engineering The University of Melbourne Melbourne 3010 Australia
| | - Fatemeh Karimi
- Polymer Science Group, Department of Chemical and Biomolecular Engineering The University of Melbourne Melbourne 3010 Australia
| | | | - Greg G. Qiao
- Polymer Science Group, Department of Chemical and Biomolecular Engineering The University of Melbourne Melbourne 3010 Australia
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44
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Reyhani A, Allison‐Logan S, Ranji‐Burachaloo H, McKenzie TG, Bryant G, Qiao GG. Synthesis of ultra‐high molecular weight polymers by controlled production of initiating radicals. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/pola.29318] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Amin Reyhani
- Department of Chemical EngineeringThe University of Melbourne Parkville Victoria 3010 Australia
| | - Stephanie Allison‐Logan
- Department of Chemical EngineeringThe University of Melbourne Parkville Victoria 3010 Australia
| | - Hadi Ranji‐Burachaloo
- Department of Chemical EngineeringThe University of Melbourne Parkville Victoria 3010 Australia
| | - Thomas G. McKenzie
- Department of Chemical EngineeringThe University of Melbourne Parkville Victoria 3010 Australia
| | - Gary Bryant
- Centre for Molecular and Nanoscale PhysicsSchool of Science, RMIT University Melbourne Victoria 3000 Australia
| | - Greg G. Qiao
- Department of Chemical EngineeringThe University of Melbourne Parkville Victoria 3010 Australia
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45
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Abstract
The removal of dissolved oxygen (O2) from solution is a prerequisite for many reactions, frequently requiring specialized equipment/reagents or expertise. Herein, we introduce a range of reusable, shelf-stable enzyme-functionalized glassware, which biocatalytically removes O2 from contained aqueous solutions. The effectiveness of the activated glassware is demonstrated by facilitating several O2-intolerant RAFT polymerizations.
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Affiliation(s)
- Mitchell D Nothling
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Thomas G McKenzie
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Isaac A Eastland
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Hao-Che Chien
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Joe Collins
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Anne S Meyer
- Department of Biotechnology and Biomedicine, Technical University of Denmark, 2800 Kgs, Lyngby, Denmark
| | - Greg G Qiao
- Department of Chemical and Biomolecular Engineering, The University of Melbourne, Melbourne, VIC 3010, Australia.
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46
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Abstract
Colourless polymeric samples comprising mechanochromic spiropyrans (SPs) rapidly appear coloured under external pressure, due to their transition from ring closed SP to ring-opened merocyanine (MC).
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Affiliation(s)
- Wenlian Qiu
- Department of Chemical Engineering
- The University of Melbourne
- Australia
| | - Paul A. Gurr
- Department of Chemical Engineering
- The University of Melbourne
- Australia
| | - Gabriel da Silva
- Department of Chemical Engineering
- The University of Melbourne
- Australia
| | - Greg G. Qiao
- Department of Chemical Engineering
- The University of Melbourne
- Australia
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47
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Abstract
Reversible addition–fragmentation chain transfer (RAFT) polymerization initiated by a radical-forming redox reaction between a reducing and an oxidizing agent (i.e. ‘redox RAFT’) represents a simple, versatile, and highly useful platform for controlled polymer synthesis. Herein, the potency of a wide range of redox initiation systems including enzyme-mediated redox reactions, the Fenton reaction, peroxide-based reactions, and metal-catalyzed redox reactions, and their application in initiating RAFT polymerization, are reviewed. These redox-RAFT polymerization methods have been widely studied for synthesizing a broad range of homo- and co-polymers with tailored molecular weights, compositions, and (macro)molecular structures. It has been demonstrated that redox-RAFT polymerization holds particular promise due to its excellent performance under mild conditions, typically operating at room temperature. Redox-RAFT polymerization is therefore an important and core part of the RAFT methodology handbook and may be of particular importance going forward for the fabrication of polymeric biomaterials under biologically relevant conditions or in biological systems, in which naturally occurring redox reactions are prevalent.
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48
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Abstract
Currently, cancer is the second largest cause of death worldwide and has reached critical levels. In spite of all the efforts, common treatments including chemotherapy, photodynamic therapy, and photothermal therapy suffer from various problems which limit their efficiency and performance. For this reason, different strategies are being explored which improve the efficiency of these traditional therapeutic methods or treat the tumor cells directly. One such strategy utilizing the Fenton reaction has been investigated by many groups for the possible treatment of cancer cells. This approach is based on the knowledge that high levels of hydrogen peroxide exist within cancer cells and can be used to catalyze the Fenton reaction, leading to cancer-killing reactive oxygen species. Analysis of the current literature has shown that, due to the diverse morphologies, different sizes, various chemical properties, and the tunable structure of nanoparticles, nanotechnology offers the most promising method to facilitate the Fenton reaction with cancer therapy. This review aims to highlight the use of the Fenton reaction using different nanoparticles to improve traditional cancer therapies and the emerging Fenton-based therapy, highlighting the obstacles, challenges, and promising developments in each of these areas.
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49
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Collins J, McKenzie TG, Nothling MD, Allison-Logan S, Ashokkumar M, Qiao GG. Sonochemically Initiated RAFT Polymerization in Organic Solvents. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01845] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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50
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Liu M, Xie K, Nothling MD, Gurr PA, Tan SSL, Fu Q, Webley PA, Qiao GG. Ultrathin Metal-Organic Framework Nanosheets as a Gutter Layer for Flexible Composite Gas Separation Membranes. ACS Nano 2018; 12:11591-11599. [PMID: 30354062 DOI: 10.1021/acsnano.8b06811] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ultrathin metal-organic framework (MOF) nanosheets show great potential in various separation applications. In this study, MOF nanosheets are incorporated as a gutter layer in high-performance, flexible thin-film composite membranes (TFCMs) for CO2 separation. Ultrathin MOF nanosheets (∼3-4 nm) were prepared via a surfactant-assisted method and subsequently coated onto a flexible porous support by vacuum filtration. This produced an ultrathin (∼25 nm), extremely flat MOF layer, which serves as a highly permeable gutter with reduced gas resistance when compared with conventional polydimethylsiloxane gutter layers. Subsequent spin-coating of the ultrathin MOF gutter layer with a polymeric selective layer (Polyactive) afforded a TFCM exhibiting the best CO2 separation performance yet reported for a flexible composite membrane (CO2 permeance of ∼2100 GPU with a CO2/N2 ideal selectivity of ∼30). Several unique MOF nanosheets were examined as gutter layers, each differing with regard to structure and thickness (∼10 and ∼80 nm), with results indicating that flexibility in the ultrathin MOF layer is critical for optimized membrane performance. The inclusion of ultrathin MOF nanosheets into next-generation TFCMs has the potential for major improvements in gas separation performance over current composite membrane designs.
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Affiliation(s)
- Min Liu
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Ke Xie
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Mitchell D Nothling
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Paul Andrew Gurr
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Shereen Siew Ling Tan
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Qiang Fu
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Paul A Webley
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
| | - Greg G Qiao
- Department of Chemical Engineering , The University of Melbourne , Parkville , Victoria 3010 , Australia
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