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Xie F, Lu F, Liu C, Tian Y, Gao Y, Zheng L, Gao X. Poly(ionic liquid) Membranes Preserving Liquid Crystalline Microstructures for Lithium-Ion Enrichment. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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Fu D, You J, Guo R, Zhang J, Li Q, Wen J, Wang H, Yan H. Preparation of Nanostructured Graphene Oxide and Its Application in Drug Loading and Sustained Release. ChemistrySelect 2022. [DOI: 10.1002/slct.202200670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dongsheng Fu
- College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
| | - Jinhui You
- School of Health Science and Engineer University of Shanghai for Science and Technology Shanghai 20009 China
| | - Ruijie Guo
- College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
| | - Jie Zhang
- College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
| | - Qiang Li
- College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
| | - Jing Wen
- College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
| | - Huifang Wang
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
| | - Hong Yan
- College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
- Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of Technology) Ministry of Education Taiyuan 030024 China
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Kasprzak C, Brown JR, Feller K, Scott PJ, Meenakshisundaram V, Williams C, Long T. Vat Photopolymerization of Reinforced Styrene-Butadiene Elastomers: A Degradable Scaffold Approach. ACS APPLIED MATERIALS & INTERFACES 2022; 14:18965-18973. [PMID: 35421307 DOI: 10.1021/acsami.2c03410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Vat photopolymerization (VP) is a high-throughput additive manufacturing modality that also offers exceptional feature resolution and surface finish; however, the process is constrained by a limited selection of processable photocurable resins. Low resin viscosity (<10 Pa·s) is one of the most stringent process-induced constraints on resin processability, which in turn limits the mechanical performance of printed resin systems. Recently, the authors created a VP-processable photosensitive latex resin, where compartmentalization of the high molecular weight polymer chains into discrete particles resulted in the decoupling of viscosity from molecular weight. However, the monomers used to form the hydrogel green body resulted in decreased ultimate material properties due to the high cross-link density. Herein, we report a novel scaffold that allows for facile UV-based AM and simultaneously enhances the final part's material properties. This is achieved with a chemically labile acetal-containing cross-linker in conjunction with N-vinylpyrrolidone, which forms a glassy polymer after photocuring. Subsequent reactive extraction cleaves the cross-links and liberates the glassy polymer, which provides mechanical reinforcement of the geometrically complex VP-printed elastomer. With only a 0.1 wt % loading of photoinitiator, G'/G'' crossover times of less than 1 s and green body plateau moduli nearing 105 Pa are obtained. In addition, removal of the hydrophilic and thermally labile scaffold results in decreased water uptake and increased thermal stability of the final printed part. Ultimate strain and stress values of over 650% and 8.5 MPa, respectively, are achieved, setting a new benchmark for styrene-butadiene VP elastomers.
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Affiliation(s)
- Christopher Kasprzak
- Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - James R Brown
- School of Molecular Sciences, Biodesign Center for Sustainable Macromolecular Materials and Manufacturing, Arizona State University, Tempe, Arizona 85281, United States
| | - Keyton Feller
- Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Philip J Scott
- Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Viswanath Meenakshisundaram
- Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Chris Williams
- Macromolecules Innovation Institute (MII), Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Timothy Long
- School of Molecular Sciences, Biodesign Center for Sustainable Macromolecular Materials and Manufacturing, Arizona State University, Tempe, Arizona 85281, United States
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Zhang Y, Kim D, Dong R, Feng X, Osuji CO. Tunable organic solvent nanofiltration in self-assembled membranes at the sub-1 nm scale. SCIENCE ADVANCES 2022; 8:eabm5899. [PMID: 35294234 PMCID: PMC8926336 DOI: 10.1126/sciadv.abm5899] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Organic solvent-stable membranes exhibiting strong selectivity and high permeance have the potential to transform energy utilization in chemical separation processes. A key goal is developing materials with uniform, well-defined pores at the 1-nm scale, with sizes that can be tuned in small increments with high fidelity. Here, we demonstrate a class of organic solvent-stable nanoporous membranes derived from self-assembled liquid crystal mesophases that display such characteristics and elucidate their transport properties. The transport-regulating dimensions are defined by the mesophase geometry and can be controlled in increments of ~0.1 nm by modifying the chemical structure of the mesogen or the composition of the mesophase. The highly ordered nanostructure affords previously unidentified opportunities for the systematic design of organic solvent nanofiltration membranes with tailored selectivity and permeability and for understanding and modeling rejection in nanoscale flows. Hence, these membranes represent progress toward the goal of enabling precise organic solvent nanofiltration.
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Affiliation(s)
- Yizhou Zhang
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, and School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Dahin Kim
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ruiqi Dong
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Xunda Feng
- Center for Advanced Low-dimension Materials, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China
| | - Chinedum O. Osuji
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
- Corresponding author.
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Choi F, Nirmal G, Pizzardi M, Acosta EJ. Formulating and Retaining the Structure of Polymerized Surfactant Phases Using a Microemulsion Curvature Framework. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:16821-16834. [PMID: 31755720 DOI: 10.1021/acs.langmuir.9b02822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanostructured polymers contain features smaller than 100 nm that are useful in a wide range of areas, including photonics, biomedical materials, and environmental applications. Out of the myriad of nanostructured polymers, surfactant-templated polymers are versatile because of their ability to have tunable domain sizes, structure, and composition. This work addresses the gap between the formulation with industrial-grade polymerizable surfactants and the final structure of the polymer, using the hydrophilic-lipophilic difference (HLD) and net-average curvature (NAC) frameworks. HLD indicates the proximity of the formulation (surfactant and oil monomer selection, temperature, electrolyte concentration) to the phase inversion point, where HLD = 0. NAC uses the HLD to determine the curvature of the surfactant-oil-water interface, leading not only to the size and shape of micelles and bicontinuous isotropic (L3) systems but also to defining the most likely regions for lyotropic liquid crystal (LLC) existence and phase separation in ternary phase diagrams. Polymerizing LLC fluids produced nanostructured polymers with similar LLC structures that were highly swellable, but with low compressive strength. Polymerizing L3 fluids produced strong, but less water-swellable nanostructured polymers with a similar characteristic length to the parent L3 microemulsion. The relatively small scale of the parent LLC (∼6-8 nm) or L3 (∼3-4 nm) systems is consistent with the translucent nature of the polymers produced and the HLD-NAC predicted sizes.
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Affiliation(s)
- Francis Choi
- Department of Chemical Engineering and Applied Chemistry , University of Toronto , Toronto M5S3E5 , Ontario , Canada
| | - Ghata Nirmal
- Department of Chemical Engineering and Applied Chemistry , University of Toronto , Toronto M5S3E5 , Ontario , Canada
| | - Monica Pizzardi
- Department of Chemical Engineering and Applied Chemistry , University of Toronto , Toronto M5S3E5 , Ontario , Canada
| | - Edgar J Acosta
- Department of Chemical Engineering and Applied Chemistry , University of Toronto , Toronto M5S3E5 , Ontario , Canada
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Perspectives in Liquid-Crystal-Aided Nanotechnology and Nanoscience. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9122512] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The research field of liquid crystals and their applications is recently changing from being largely focused on display applications and optical shutter elements in various fields, to quite novel and diverse applications in the area of nanotechnology and nanoscience. Functional nanoparticles have recently been used to a significant extent to modify the physical properties of liquid crystals by the addition of ferroelectric and magnetic particles of different shapes, such as arbitrary and spherical, rods, wires and discs. Also, particles influencing optical properties are increasingly popular, such as quantum dots, plasmonic, semiconductors and metamaterials. The self-organization of liquid crystals is exploited to order templates and orient nanoparticles. Similarly, nanoparticles such as rods, nanotubes and graphene oxide are shown to form lyotropic liquid crystal phases in the presence of isotropic host solvents. These effects lead to a wealth of novel applications, many of which will be reviewed in this publication.
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