Morphology control in thin films of PS:PLA homopolymer blends by dip-coating deposition

Vital, Alexane; Vayer, Marylène; Tillocher, Thomas; Dussart, Rémi; Boufnichel, Mohamed; Sinturel, Christophe

doi:10.1016/j.apsusc.2016.09.151

Cited by 34 publications

(28 citation statements)

References 38 publications

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“…On the one hand, it promotes the photocatalytic, on the other hand, TiO 2 enhances the hydrophilicity of the coating which promotes higher interaction between the pollutant and the photocatalytic nanoparticles, favoring the adsorption of CIP. In this context, the detachment of the poorly attached nanoparticles to the coating surface often contributes to a decrease in the photocatalytic efficiency, in good agreement with previous works . Additionally, other works have reported the enhanced hydrophilicity of TiO 2 /PVDF nanocomposites when compared with the pristine polymer .…”

Section: Resultssupporting

confidence: 90%

“…Figure f summarizes the average coating thickness, as 66 ± 13, 385 ± 5, 489 ± 3, and 887 ± 8 µm were measured for one, two, four, and six dips, respectively (Figure b–e). The increase of the coating thickness by increasing the number of dips was previously reported . The larger thickness found in the multicoating tests are related to the withdraw velocity of the POF and the viscosity of the solutions .…”

Section: Resultssupporting

confidence: 71%

“…The increase of the coating thickness by increasing the number of dips was previously reported . The larger thickness found in the multicoating tests are related to the withdraw velocity of the POF and the viscosity of the solutions . The thickness of the coating is critical for photocatalytic applications, as thicker coatings represent a drawback because of the higher distance between the inner layers—where the visible radiation intensity is higher as it is closer to the PMMA core that transports the radiation—and the outer layers, in contact with the pollutant .…”

Section: Resultsmentioning

confidence: 58%

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Reusable Photocatalytic Optical Fibers for Underground, Deep‐Sea, and Turbid Water Remediation

et al. 2018

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An approach for underground, deep, and turbid water remediation is presented based on optical fibers with a photocatalytic coating. Thus, photocatalytic TiO 2 P25 nanoparticles immobilized in a poly(vinylidene difluoride) (PVDF) matrix are coated on polymeric optical fibers (POFs) and the photocatalytic performance of the system is assessed under artificial sunlight. To the best of our knowledge, poly(methyl methacrylate)‐POF coated with TiO 2 /PVDF and the reusability of any type of POF for photocatalytic applications are not previously reported. The photocatalytic efficiency of the hybrid material in the degradation of ciprofloxacin (CIP) and its reusability are evaluated here. It is shown that 50 w/w% of TiO 2 P25 achieves a degradation of 95% after 72 h under artificial sunlight and a reusability of three times leads to a loss of activity inferior to 11%. The efficient removal of ciprofloxacin and the stability of the POF coated with TiO 2 P25 successfully demonstrate its suitability in the degradation of pollutants with potential application in regions with low light illumination, as in underground and deep water.

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Section: Resultssupporting

confidence: 90%

Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 58%

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Reusable Photocatalytic Optical Fibers for Underground, Deep‐Sea, and Turbid Water Remediation

et al. 2018

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“…In the case of PS-containing blends, it is well recognized that polystyrene possessed limited degradation and narrow affinity to the water, which made the disposal of PS difficult after use. In order to modify the degradation process of PS, PS was blended with TPS, realized using several plasticizers, and the results indicated that blending of PLA with PS might be one of the best ways to find an equilibrium between cost effective PLA and also find reduced properties of PS [249,250]. Imre et al [193] found a correlation between structure and interactions (Figure 6f), by determination of dispersed particles size, calculation of the Flory–Huggins interaction solubility parameters, and by the quantitative estimation of the composition dependence of tensile strength.…”

Section: Hybrid Blends Based On Bio-based and Fossil Fuel-derived mentioning

confidence: 99%

Bio- and Fossil-Based Polymeric Blends and Nanocomposites for Packaging: Structure–Property Relationship

2019

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In the present review, the possibilities for blending of commodities and bio-based and/or biodegradable polymers for packaging purposes has been considered, limiting the analysis to this class of materials without considering blends where both components have a bio-based composition or origin. The production of blends with synthetic polymeric materials is among the strategies to modulate the main characteristics of biodegradable polymeric materials, altering disintegrability rates and decreasing the final cost of different products. Special emphasis has been given to blends functional behavior in the frame of packaging application (compostability, gas/water/light barrier properties, migration, antioxidant performance). In addition, to better analyze the presence of nanosized ingredients on the overall behavior of a nanocomposite system composed of synthetic polymers, combined with biodegradable and/or bio-based plastics, the nature and effect of the inclusion of bio-based nanofillers has been investigated.

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“…Work in living animals will be required to hone antibiotic loading and release to allow complete bolus release. In addition, studies are being conducted to determine the optimal PLA coating thickness, as we found that the membrane thickness and susceptibility to US-triggered rupture is highly tunable by varying the concentration of PLA in the solution as well as the number of coatings applied to the clip [ 69 , 70 ].…”

Section: Discussionmentioning

confidence: 99%

Ultrasound-triggered antibiotic release from PEEK clips to prevent spinal fusion infection: Initial evaluations

et al. 2019

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Despite aggressive peri-operative antibiotic treatments, up to 10% of patients undergoing instrumented spinal surgery develop an infection. Like most implant-associated infections, spinal infections persist through colonization and biofilm formation on spinal instrumentation, which can include metal screws and rods for fixation and an intervertebral cage commonly comprised of polyether ether ketone (PEEK). We have designed a PEEK antibiotic reservoir that would clip to the metal fixation rod and that would achieve slow antibiotic release over several days, followed by a bolus release of antibiotics triggered by ultrasound (US) rupture of a reservoir membrane. We have found using human physiological fluid (synovial fluid), that higher levels (100–500 μg) of vancomycin are required to achieve a marked reduction in adherent bacteria vs. that seen in the common bacterial medium, trypticase soy broth. To achieve these levels of release, we applied a polylactic acid coating to a porous PEEK puck, which exhibited both slow and US-triggered release. This design was further refined to a one-hole or two-hole cylindrical PEEK reservoir that can clip onto a spinal rod for clinical use. Short-term release of high levels of antibiotic (340 ± 168 μg), followed by US-triggered release was measured (7420 ± 2992 μg at 48 h). These levels are sufficient to prevent adhesion of Staphylococcus aureus to implant materials. This study demonstrates the feasibility of an US-mediated antibiotic delivery device, which could be a potent weapon against spinal surgical site infection.

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Morphology control in thin films of PS:PLA homopolymer blends by dip-coating deposition

Cited by 34 publications

References 38 publications

Reusable Photocatalytic Optical Fibers for Underground, Deep‐Sea, and Turbid Water Remediation

Reusable Photocatalytic Optical Fibers for Underground, Deep‐Sea, and Turbid Water Remediation

Bio- and Fossil-Based Polymeric Blends and Nanocomposites for Packaging: Structure–Property Relationship

Ultrasound-triggered antibiotic release from PEEK clips to prevent spinal fusion infection: Initial evaluations

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