Preparation of a polysulfone-based polymer-silicate nanocomposite

Волкова, Т. С.; Beider, É. Ya.

doi:10.1134/s0040579511050162

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…The absence of measurable effects of nanoparticles on T g in PSF is not uncommon. It has been found in several PSF nanocomposites loaded with carbon nanotubes, 39,40 polyhedral oligomeric silsesquioxane 41 and organosilicates 42 although other similar systems present opposite behavior. An example is poly(methyl methacrylate)(PMMA)/γ-Al 2 O 3 , a deeply ).…”

Section: Resultsmentioning

confidence: 95%

γ-Alumina Modification with Long Chain Carboxylic Acid Surface Nanocrystals for Biocompatible Polysulfone Nanocomposites

Anaya

Serrano

Herrero

et al. 2014

ACS Appl. Mater. Interfaces

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High performance polysulfone/γ-alumina biocom-patible nanocomposites are reported for the first time and the effects of γ-alumina surface modification are explored. We show that some fatty acids chemisorb over the surface of γ-alumina forming nanosized self-assembled structures. These structures present thermal transitions at high temperatures, 100 °C higher than the melting temperatures of the pure acids, and are further shifted about 50 °C in the presence of polysulfone. The chemistry involved in the chemisorption is mild and green meeting the stringent bio sanitary protocols for biocompatible devices. It has been found that the self-assembled structures increase mechanical strength by about 20% despite the foreseeable lack of strong particle−matrix interactions, which manifests as small variations in both the glass transition temperature and the Young's modulus. Electron microscopy observation of fractured surfaces has revealed that some acids induce an extended region of influence around the nanoparticles and this fact has been used to explain the enhancement of mechanical strength.

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Section: Resultsmentioning

confidence: 95%

γ-Alumina Modification with Long Chain Carboxylic Acid Surface Nanocrystals for Biocompatible Polysulfone Nanocomposites

Anaya

Serrano

Herrero

et al. 2014

ACS Appl. Mater. Interfaces

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“…[1][2][3][4] However, in some cases, polysulfones and their derivatives can show relatively poor mechanical and wear resistance, so different types of inorganic nanofillers have been incorporated into this polymer, [5][6][7][8] with the aim of expanding its applications through the enhancement of mechanical strength 9,10 without the loss of desirable physical properties. [11][12][13] These characteristics have demonstrated to be very strongly dependent on the dispersion state of the nanoparticles in the polymer matrix. 14,15 Nowadays it is well established that the dispersion state of nanoparticles, within a polymer matrix, controls the physical and mechanical properties of the nanocomposite.…”

Section: Introductionmentioning

confidence: 99%

The effect of polymer grafting in the dispersibility of alumina/polysulfone nanocomposites

2016

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Abstract-Alumina nanoparticles have been modified with polysulfone (PSU) chains via 1,3-dipolar cycloaddi-tion reaction between functionalized alumina with vinyl groups and terminal azide polysulfone chains of two differ-ent molecular weights. Homopolymer nanocomposites have been prepared for the first time by extrusion and microinjection. The effectiveness of the grafts on the dispersiblity has been analyzed in terms of the parameters that govern the wettability between grafted and matrix chains: graft density ( ), graft molecular weight (N) at constant matrix molecular weight (P).The dispersion state and interfacial adhesion of PSU grafted-nanoparticles have been evaluated from laser scanning confocal, FESEM and SEM microscopy. Results show that the incorporation of the modified g-alumina improves the dispersion state in comparison with bare alumina nanoparticles, reducing the aver-age particle size from 5±9 to 1.3±1 microns. Although aggregates are still present the size of the aggregates are also substantially reduced even with low or moderate graft density used in this work, but further improves the interfacial adhesion between nanoparticle and matrix when long PSU chains are grafted even with low-moderate grafting den-sity. These results can be explained by enthalpic compatibility between polysulfone grafted layer and host polysul-fone matrix

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Preparation of a polysulfone-based polymer-silicate nanocomposite

Cited by 2 publications

References 13 publications

γ-Alumina Modification with Long Chain Carboxylic Acid Surface Nanocrystals for Biocompatible Polysulfone Nanocomposites

γ-Alumina Modification with Long Chain Carboxylic Acid Surface Nanocrystals for Biocompatible Polysulfone Nanocomposites

The effect of polymer grafting in the dispersibility of alumina/polysulfone nanocomposites

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