Poly(methyl methacrylate) composites of copper-4,4′-trimethylenedipyridine

Liu, Shisi; Ananthoji, Ramakanth; Han, SangHyeok; Knudsen, Bernard; Li, Xiao; Wojtas, Łukasz; Massing, Justin O.; Gauthier, Carmen Valdez; Harmon, Julie P.

doi:10.1039/c2nj20745a

Cited by 5 publications

(6 citation statements)

References 48 publications

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“…Viscoelastic properties [65] had always been the staple of mechanical characterisation of a broad range of polymeric materials and soft matter, which demonstrate time-and temperaturedependent mechanical deformation with viscous characteristics. The introduction of nanoparticles (as functional fillers) into polymer matrix and the subsequent modification of viscoelastic response has been the subject of intense interest, with promising results exemplified by a number of recent reports [66][67][68]. The incorporation of nanoparticles that are structurally and chemically distinct from the polymer matrix phase will induce changes to the matrix, and these changes, however subtle, can be identified via the determination of the nanocomposite's viscoelastic properties, i.e.…”

Section: Viscoelastic Properties Of As-prepared and Annealed Nanocomp...mentioning

confidence: 99%

Mixed-matrix membranes of zeolitic imidazolate framework (ZIF-8)/Matrimid nanocomposite: Thermo-mechanical stability and viscoelasticity underpinning membrane separation performance

Mahdi

Tan

2016

Journal of Membrane Science

137

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Section: Viscoelastic Properties Of As-prepared and Annealed Nanocomp...mentioning

confidence: 99%

Mixed-matrix membranes of zeolitic imidazolate framework (ZIF-8)/Matrimid nanocomposite: Thermo-mechanical stability and viscoelasticity underpinning membrane separation performance

Mahdi

Tan

2016

Journal of Membrane Science

137

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“…This novel grade of MOF-based nanocomposite membranes belongs to a rapidly growing research area, termed "mixed matrix membranes" (MMMs). 15,16 It is surprising that relatively little is known about the mechanical behaviour of MOF-based MMMs, 13,17 particularly concerning their tribological behavior. Indeed, good tribological performance is key to enable many industrial-scale applications, not only during the membrane manufacturing and packaging steps but also to warrant durability and extended lifetime in service.…”

mentioning

confidence: 99%

Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes

et al. 2014

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We combined zeolitic imidazolate framework nanoparticles (ZIF-8: ˜150 nm diameter) with Matrimid® 5218 polymer to form permeable mixed matrix membranes, featuring different weight fractions of nanoparticles (up to 30 wt. % loading). We used ball-on-disc micro-tribological method to measure the frictional coefficient of the nanocomposite membranes, as a function of nanoparticle loading and annealing heat treatment. The tribological results reveal that the friction and wear of the unannealed samples rise steadily with greater nanoparticle loading because ZIF-8 is relatively harder than the matrix, thus promoting abrasive wear mechanism. After annealing, however, we discover that the nanocomposites display an appreciably lower friction and wear damage compared with the unannealed counterparts. Evidence shows that the major improvement in tribological performance is associated with the greater amounts of wear debris derived from the annealed nanocomposite membranes. We propose that detached Matrimid-encapsulated ZIF-8 nanoparticles could function as “spacers,” which are capable of not only reducing direct contact between two rubbing surfaces but also enhancing free-rolling under the action of lateral forces.

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“…Supramolecular interactions (i.e., coordination bond, and van der Waals forces) naturally and quickly attract these two polymers in close contact, and effectively restrain the undesirable diffusion of ions and dye molecules in the electrochromic system (Figure 2c and Figures S9, S10, S11, S13: Supporting Information). [ 29 ] The electrochemical feasibility of the PyMA‐CuCl/ODBMA system was conducted by cyclic voltammetry. The oxidation potential of PyMA‐CuCl (0.59 V) is lower than the oxidation potential of ODBMA (0.99 V).…”

Section: Resultsmentioning

confidence: 99%

Dynamic Metal–Ligand Interaction of Synergistic Polymers for Bistable See‐Through Electrochromic Devices

et al. 2022

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Bistable electrochromic materials are a promising alternative solution to reduce energy consumption in displays. Limited by the mechanism and lack of a design strategy, only a few electrochromic materials have truly been able achieve bistability. Herein, a novel strategy is proposed to design bistable electrochromic materials based on polymer‐assisted dynamic metal–ligand coordination. The mechanism and materials of such unconventional electrochromic systems are proved by sufficient characterization. Synergistic stabilization of polymerized switchable dyes and the ionic ligand polymer are attracted to each other by supramolecular forces. The color states of the dye molecules are controlled and stabilized by valence changes of the metal ions. Meanwhile, through the polymerization of the electrochromic material and the nearby metal–ligand material, the metal ions of the electroinduced valence change are tightly fixed, and the related diffusion problem of the active EC component is also almost completely suppressed. This strategy successfully enables preparation of the corresponding transparent electrochromic displays with good performances, such as, the display information is clearly visible for more than 1.5 h without consuming energy. Furthermore, the new way of dynamic coordination or dissociation bistable displays could likely prosper the development of the electrochromic area and inspire other fields.

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Poly(methyl methacrylate) composites of copper-4,4′-trimethylenedipyridine

Cited by 5 publications

References 48 publications

Mixed-matrix membranes of zeolitic imidazolate framework (ZIF-8)/Matrimid nanocomposite: Thermo-mechanical stability and viscoelasticity underpinning membrane separation performance

Mixed-matrix membranes of zeolitic imidazolate framework (ZIF-8)/Matrimid nanocomposite: Thermo-mechanical stability and viscoelasticity underpinning membrane separation performance

Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes

Dynamic Metal–Ligand Interaction of Synergistic Polymers for Bistable See‐Through Electrochromic Devices

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