Morphological analysis of self-assembled SIS block copolymer matrices containing silver nanoparticles

Peponi, Laura; Tercjak, Agnieszka; Torre, Luigi; Kenny, J. M.; Mondragón, Iñaki

doi:10.1016/j.compscitech.2008.02.032

Cited by 25 publications

(24 citation statements)

References 25 publications

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“…It only contains 15 wt% of PS, thus demonstrating that the small PS microphase of the copolymer, cannot host all the Ag nanoparticles which correspond to 0.10 vol% of the total amount of copolymer. A deeper morphological study of the last system, L4-N4 (Figure 3d), has been reported in a previous publication [29]. Here, it is worth noting that for L4, a cylindrical nanostructure is detected, confirming the microphase separation of PS blocks.…”

Section: Figure 2 Frequency Dependence Of Storage Modulus (') Loss mentioning

confidence: 51%

“…This selectivity is exploited to design the properties of nanoparticle/block copolymer hybrid systems containing well-dispersed nanoparticles [27]. As previously published by our research group [28,29], when surfactant modified silver nanoparticles are added to poly(styrene-b-isoprene-b-styrene) as well as to poly(styrene-b-butadiene-b-styrene), morphological changes can be obtained due to the enlargement of the polystyrene phase. Consequently, the thermal, mechanical and rheological behaviour of the nanocomposites would change with respect to the same properties shown by neat BC.…”

Section: Introductionmentioning

confidence: 70%

“…Table 1 reports T ODT values obtained for the different block copolymers studied. Moreover, in order to confirm these transitions, a morphological AFM analysis of the neat BC annealed at different temperatures has been previously reported [28,29]. In fact, it is worth to note that self-assembled nanostructures of the block copolymer matrix retain its cylindrical structure for different annealing times and temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, although the polymer was above the T g of both block copolymers, the morphology remained constant for different annealing times for all the investigated systems. This behaviour was deeply analyzed in previous research [28,29] and attributed to the strong segregation regime of the system under these conditions.…”

Section: Rheological Testsmentioning

confidence: 99%

“…Following these results we have selected 1 wt%, corresponding to 0.10 vol%, as this concentration of silver nanoparticles showed a better dispersion behaviour. Following previous research results on the efficiency of different surfactants on the dispersion of Ag nanoparticles in polymer matrices [29] we have selected dodecanethiol, DT, from SigmaAldrich ® , Spain, as surfactant in this research. Pure toluene was used as solvent.…”

Section: Experimental 21 Materialsmentioning

confidence: 99%

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Morphology-properties relationship on nanocomposite films based on poly(styrene-block-diene-block-styrene) copolymers and silver nanoparticles

Peponi¹,

Tercjak²,

Martin³

et al. 2011

Express Polym. Lett.

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Abstract. A comparative study on the self-assembled nanostructured morphology and the rheological and mechanical properties of four different triblock copolymers, based on poly(styrene-block-butadiene-block-styrene) and poly(styrene-blockisoprene-block-styrene) matrices, and of their respective nanocomposites with 1 wt% silver nanoparticles, is reported in this work. In order to obtain well-dispersed nanoparticles in the block copolymer matrix, dodecanethiol was used as surfactant, showing good affinity with both nanoparticles and the polystyrene phase of the matrices as predicted by the solubility parameters calculated based on Hoftyzer and Van Krevelen theory. The block copolymer with the highest PS content shows the highest tensile modulus and tensile strength, but also the smallest elongation at break. When silver nanoparticles treated with surfactant were added to the block copolymer matrices, each system studied shows higher mechanical properties due to the good dispersion and the good interface of Ag nanoparticles in the matrices. Furthermore, it has been shown that semiempirical models such as Guth and Gold equation and Halpin-Tsai model can be used to predict the tensile modulus of the analyzed nanocomposites.

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Section: Figure 2 Frequency Dependence Of Storage Modulus (') Loss mentioning

confidence: 51%

Section: Introductionmentioning

confidence: 70%

Section: Resultsmentioning

confidence: 99%

Section: Rheological Testsmentioning

confidence: 99%

Section: Experimental 21 Materialsmentioning

confidence: 99%

See 3 more Smart Citations

Morphology-properties relationship on nanocomposite films based on poly(styrene-block-diene-block-styrene) copolymers and silver nanoparticles

Peponi¹,

Tercjak²,

Martin³

et al. 2011

Express Polym. Lett.

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Silicon and carbon substrates induced arrangement changes in poly(styrene‐b‐isoprene‐b‐styrene) block copolymer thin films

Zalakain

Ramos

Fernández

et al. 2012

J of Applied Polymer Sci

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Poly(styrene-b-isoprene-b-styrene) (SIS) block copolymer ordering in thin films was studied using two selective substrates as carbon and silicon. Atomic force microscopy (AFM) and contact angle measurements were employed to examine the affinities between domains and surrounding interfaces. The surface morphology was examined by AFM using different amplitude ratios. Results showed polyisoprene (PI) domain layer formation in the outermost film layer. On the other hand, the layer close to substrate adopted different arrangements on silicon and carbon substrates. Topographical and phase images revealed that in both substrates with the thickest films, the interactions between substrate and block domains were not enough to induce surface ordering being the morphology independent of employed substrate. However, decreasing film thickness, SIS thin films displayed a variety of arrangements such as perforated lamellae and cylindrical morphologies. Depending on substrate, these morphologies were achieved in different film thicknesses. Finally, the thinnest film did not adjust to characteristic domain spacing commensurability and terraces formation was observed. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 125: [1552][1553][1554][1555][1556][1557][1558] 2012

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Preparation and drug release performance of amphiphilic medical hot‐melt pressure sensitive adhesives based on polystyrene‐isoprene‐styrene

Zhou

Guo

2023

J of Applied Polymer Sci

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Hot-melt pressure-sensitive adhesives (HMPSAs) with polystyrene-isoprenestyrene (SIS) as the backbone material are widely used in transdermal drug delivery systems (TDDS) because of their high cohesive strength and drug-carrying capacity. However, it is restricted by its high hydrophobicity when loaded with hydrophilic drugs. In this study, HMPSAs with amphiphilic properties were created by mixing SIS with fatty alcohol polyoxyethylene ether (AEO-9) and polyethylene glycol (PEG) of different molecular weights to improve the ability of HMPSAs to deliver hydrophilic drugs. The effects of different molecular weights of PEG on the hydrophilicity of HMPSAs were also investigated. Additionally, gardenia glycosides and oleanolic acid were selected for drug release experiments.Compared to untreated HMPSAs, HMPSAs modified with AEO-9 and PEG2000 could convert from hydrophobic to hydrophilic. The contact angle could be reduced from 91.8 to 25.6 , and the 24-hour water absorption could be raised by 170%. The drug release experiments demonstrate that SIS/AEO-9/PEG2000 enhances the release efficiency of the hydrophilic drug gardenia jasminoides by 69%. In summary, as a novel amphiphilic medicinal HMPSAs, SIS/AEO-9/PEG offered a broad application promise in hydrophilic drug release.

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Morphological analysis of self-assembled SIS block copolymer matrices containing silver nanoparticles

Cited by 25 publications

References 25 publications

Morphology-properties relationship on nanocomposite films based on poly(styrene-block-diene-block-styrene) copolymers and silver nanoparticles

Morphology-properties relationship on nanocomposite films based on poly(styrene-block-diene-block-styrene) copolymers and silver nanoparticles

Silicon and carbon substrates induced arrangement changes in poly(styrene‐b‐isoprene‐b‐styrene) block copolymer thin films

Preparation and drug release performance of amphiphilic medical hot‐melt pressure sensitive adhesives based on polystyrene‐isoprene‐styrene

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