Готові списки джерел за темами / Polymer brush architecture

Добірка наукової літератури з теми "Polymer brush architecture"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Polymer brush architecture"

1

Choi, Jihoon, Michael J. A. Hore, Nigel Clarke, Karen I. Winey, and Russell J. Composto. "Nanoparticle Brush Architecture Controls Polymer Diffusion in Nanocomposites." Macromolecules 47, no. 7 (March 19, 2014): 2404–10. http://dx.doi.org/10.1021/ma500235v.

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2

Gunkel, Gesine, Marie Weinhart, Tobias Becherer, Rainer Haag, and Wilhelm T. S. Huck. "Effect of Polymer Brush Architecture on Antibiofouling Properties." Biomacromolecules 12, no. 11 (November 14, 2011): 4169–72. http://dx.doi.org/10.1021/bm200943m.

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3

Yoshikawa, Chiaki, Keita Sakakibara, Punnida Nonsuwan, Tomohiko Yamazaki, and Yoshinobu Tsujii. "Nonbiofouling Coatings Using Bottlebrushes with Concentrated Polymer Brush Architecture." Biomacromolecules 22, no. 6 (May 3, 2021): 2505–14. http://dx.doi.org/10.1021/acs.biomac.1c00247.

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4

Aguilar-Castillo, Bethsy Adriana, Jose Luis Santos, Hanying Luo, Yanet E. Aguirre-Chagala, Teresa Palacios-Hernández, and Margarita Herrera-Alonso. "Nanoparticle stability in biologically relevant media: influence of polymer architecture." Soft Matter 11, no. 37 (2015): 7296–307. http://dx.doi.org/10.1039/c5sm01455g.

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Анотація:
We contrast the behavior of nanoparticles formed by the self-assembly of polymers based on poly(ethylene glycol) (PEG) and poly(d,l-lactide), with linear, linear-dendritic and bottle-brush architectures in biologically relevant media.
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5

Schmitt, Michael, Chin Ming Hui, Zachary Urbach, Jiajun Yan, Krzysztof Matyjaszewski, and Michael R. Bockstaller. "Tailoring structure formation and mechanical properties of particle brush solids via homopolymer addition." Faraday Discussions 186 (2016): 17–30. http://dx.doi.org/10.1039/c5fd00121h.

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Анотація:
Recent progress in the area of surface-initiated controlled radical polymerization (SI-CRP) has enabled the synthesis of polymer-grafted colloids with precise control over the architecture of grafted chains. The resulting ‘particle brush materials’ are of interest both from a fundamental as well as applied perspective because structural frustrations (associated with the tethering of chains to a curved surface) imply a sensitive dependence of the interactions between brush particles on the architecture of surface-tethered chains that offers new opportunities to design hybrid materials with novel functionalities. An important prerequisite for establishing structure–property relations in particle brush materials is to understand the role of homopolymer impurities that form, for example, by thermal self-initiation. This contribution presents a detailed discussion of the role of homopolymer additives on the structure and mechanical properties of particle brush materials. The results suggest that the dissolution of homopolymer fillers follows a two-step mechanism comprised of the initial segregation of homopolymer to the interstitial regions within the array and the subsequent swelling of the particle brush (depending on the respective degree of polymerization of brush and linear chains). Addition of even small amounts of homopolymer is found to significantly increase the fracture toughness of particle brush assembly structures. The increased resistance to failure could enable the synthesis of robust colloidal crystal type materials that can be processed into complex shapes using ‘classical’ polymer forming techniques such as molding or extrusion.
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6

Alves, Patrícia, Luciana Calheiros Gomes, Cesar Rodríguez-Emmenegger, and Filipe José Mergulhão. "Efficacy of A Poly(MeOEGMA) Brush on the Prevention of Escherichia coli Biofilm Formation and Susceptibility." Antibiotics 9, no. 5 (April 29, 2020): 216. http://dx.doi.org/10.3390/antibiotics9050216.

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Анотація:
Urinary tract infections are one of the most common hospital-acquired infections, and they are often associated with biofilm formation in indwelling medical devices such as catheters and stents. This study aims to investigate the antibiofilm performance of a polymer brush—poly[oligo(ethylene glycol) methyl ether methacrylate], poly(MeOEGMA)—and evaluate its effect on the antimicrobial susceptibility of Escherichia coli biofilms formed on that surface. Biofilms were formed in a parallel plate flow chamber (PPFC) for 24 h under the hydrodynamic conditions prevailing in urinary catheters and stents and challenged with ampicillin. Results obtained with the brush were compared to those obtained with two control surfaces, polydimethylsiloxane (PDMS) and glass. The polymer brush reduced by 57% the surface area covered by E. coli after 24 h, as well as the number of total adhered cells. The antibiotic treatment potentiated cell death and removal, and the total cell number was reduced by 88%. Biofilms adapted their architecture, and cell morphology changed to a more elongated form during that period. This work suggests that the poly(MeOEGMA) brush has potential to prevent bacterial adhesion in urinary tract devices like ureteral stents and catheters, as well as in eradicating biofilms developed in these biomedical devices.
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7

Liu, Caihong, Jongho Lee, Jun Ma, and Menachem Elimelech. "Antifouling Thin-Film Composite Membranes by Controlled Architecture of Zwitterionic Polymer Brush Layer." Environmental Science & Technology 51, no. 4 (February 2, 2017): 2161–69. http://dx.doi.org/10.1021/acs.est.6b05992.

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8

Yaremchuk, D., T. Patsahan, and J. Ilnytskyi. "Photo-switchable liquid crystalline brush as an aligning surface for liquid crystals: modelling via mesoscopic computer simulations." Condensed Matter Physics 25, no. 3 (2022): 33601. http://dx.doi.org/10.5488/cmp.25.33601.

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Анотація:
We consider the mesoscopic model for the liquid crystalline brush that might serve as a photoswitchable aligning surface for preorientation of low molecular weight liquid crystals in a bulk. The brush is built by grafting the polymer chains of a side-chain molecular architecture, with the side chains terminated by a chromophore unit mimicking the azobenzene unit, to a substrate. When irradiated with ultraviolet light, the chromophores photoisomerize into a non-mesogenic cis state and the whole system turns into an ordinary polymer brush with no orientational order and two states: the collapsed and straightened one, depending on the grafting density. When irradiated with visible light, the chromophores photoisomerize into a mesogenic trans state, resulting in formation of a transient network between chains because of a strong attraction between chromophores. Spontaneous self-assembly of the brush in these conditions results in an orientationally isotropic polydomain structure. The desired uniaxial planar ordering of chromophores within a brush can be achieved at certain temperature and grafting density intervals, as the result of a two-stage preparation protocol. An external stimulus orients chromophores uniaxially at the first stage. The system is equilibrated at the second stage at a given temperature and with the external stimulus switched off. The preoriented chromophores either keep or loose their orientations depending on the strength of the memory effect inherent to a transient network of chains that are formed during the first stage, similarly to the case of the liquid crystalline elastomers, where such effects are caused by the covalent crosslinks.
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9

Laktionov, Mikhail Y., Ekaterina B. Zhulina, Ralf P. Richter, and Oleg V. Borisov. "Polymer Brush in a Nanopore: Effects of Solvent Strength and Macromolecular Architecture Studied by Self-Consistent Field and Scaling Theory." Polymers 13, no. 22 (November 14, 2021): 3929. http://dx.doi.org/10.3390/polym13223929.

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Анотація:
To study conformational transition occuring upon inferior solvent strength in a brush formed by linear or dendritically branched macromolecules tethered to the inner surface of cylindrical or planar (slit-like) pore, a self-consistent field analytical approach is employed. Variations in the internal brush structure as a function of variable solvent strength and pore radius, and the onset of formation of a hollow channel in the pore center are analysed. The predictions of analytical theory are supported and complemented by numerical modelling by a self-consistent field Scheutjens–Fleer method. Scaling arguments are used to study microphase segregation under poor solvent conditions leading to formation of a laterally and longitudinally patterned structure in planar and cylindrical pores, respectively, and the effects of confinement on "octopus-like" clusters in the pores of different geometries.
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10

Wang, Gang, Wei Huang, Nicholas D. Eastham, Simone Fabiano, Eric F. Manley, Li Zeng, Binghao Wang, et al. "Aggregation control in natural brush-printed conjugated polymer films and implications for enhancing charge transport." Proceedings of the National Academy of Sciences 114, no. 47 (November 6, 2017): E10066—E10073. http://dx.doi.org/10.1073/pnas.1713634114.

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Анотація:
Shear-printing is a promising processing technique in organic electronics for microstructure/charge transport modification and large-area film fabrication. Nevertheless, the mechanism by which shear-printing can enhance charge transport is not well-understood. In this study, a printing method using natural brushes is adopted as an informative tool to realize direct aggregation control of conjugated polymers and to investigate the interplay between printing parameters, macromolecule backbone alignment and aggregation, and charge transport anisotropy in a conjugated polymer series differing in architecture and electronic structure. This series includes (i) semicrystalline hole-transporting P3HT, (ii) semicrystalline electron-transporting N2200, (iii) low-crystallinity hole-transporting PBDTT-FTTE, and (iv) low-crystallinity conducting PEDOT:PSS. The (semi-)conducting films are characterized by a battery of morphology and microstructure analysis techniques and by charge transport measurements. We report that remarkably enhanced mobilities/conductivities, as high as 5.7×/3.9×, are achieved by controlled growth of nanofibril aggregates and by backbone alignment, with the adjusted R2 (R2adj) correlation between aggregation and charge transport as high as 95%. However, while shear-induced aggregation is important for enhancing charge transport, backbone alignment alone does not guarantee charge transport anisotropy. The correlations between efficient charge transport and aggregation are clearly shown, while mobility and degree of orientation are not always well-correlated. These observations provide insights into macroscopic charge transport mechanisms in conjugated polymers and suggest guidelines for optimization.
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Більше джерел

Дисертації з теми "Polymer brush architecture"

1

Naderi, Ali. "Polyelectrolytes : Bottle-Brush Architectures and Association with Surfactants." Doctoral thesis, Stockholm : Kemi, Chemistry, Kungliga Tekniska högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4683.

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2

Scheibelein, Christoph [Verfasser]. "Mechanical Activation of Polymer Brushes and the Evolution of Stable Brush Architectures / Christoph Scheibelein." München : Verlag Dr. Hut, 2018. http://d-nb.info/1168535026/34.

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3

Hsu, Shu-Yao. "Fabrication of Well-Defined Architectures of Ultrahigh-Molecular-Weight Polymers by Living Radical Polymerization." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215574.

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