Laterally-resolved mechanical and tribological properties of laser-structured polymer nanocomposites

Rodríguez-Beltrán, René I.; Martínez-Tong, Daniel E.; Reyes-Contreras, A.; Paszkiewicz, Sandra; Szymczyk, Anna; Ezquerra, Tiberio A.; Moreno, Pablo; Rebollar, Esther

doi:10.1016/j.polymer.2019.02.034

Cited by 14 publications

(31 citation statements)

References 57 publications

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“…Lately, there has been a continuous increase in the use of high-resolution nanomechanical measurements to study polymer materials [43][44][45][46][47][48][49] Based on the PF-QNM maps, and using the same calibration, we performed force spectroscopy measurements on selected regions of the thin films. For these measurements, we applied a linear ramp of 200 nm length in the Z direction of the piezo scanner (vertical movement).…”

Section: Film Preparation and Atomic Force Microscopy (Afm) Measuremementioning

confidence: 99%

Poly(alkylene 2,5-furanoate)s thin films: Morphology, crystallinity and nanomechanical properties

Robles‐Hernández

Soccio

Castrillo

et al. 2020

Polymer

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Poly(alkylene 2,5-furanoate)s are considered as the most attractive and interesting alternatives to replace oil-based terephthalic polymers. These furan-based polyesters can be synthesized using fully bio-based synthetic strategies, allowing to reduce the environmental impact of plastics. At the same time, these polymers have shown outstanding thermal, mechanical and gas-barrier properties. All these results envisage their industrial use in the near future. Now, considering the downscaling of the products' size towards the nanometer scale, we present a study of the morphology and nanomechanical properties of poly(alkylene 2,5-furanoate) thin films. Using Atomic Force Microscopy, we report the development of nanostructures upon crystallization, following different thermal treatments, for thin films with thicknesses below 200 nm. Moreover, we studied the impact of crystal growth in the nanomechanical properties of these materials. We found that the polymer thin films preserve their excellent mechanical response even in the confined geometry, as proved by the Young's moduli values close to the GPa, accompanied by high surface stiffness, and low indentation depths. The poly(alkylene 2,5-furanoate) thin films were found to have nanomechanical properties comparable to those of the oil-based poly(ethylene terephthalate), a further evidence that in the future they could replace traditional polymers in several applications.

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Section: Film Preparation and Atomic Force Microscopy (Afm) Measuremementioning

confidence: 99%

Poly(alkylene 2,5-furanoate)s thin films: Morphology, crystallinity and nanomechanical properties

Robles‐Hernández

Soccio

Castrillo

et al. 2020

Polymer

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“…This approach has been used extensively in recent literature to evaluate nanomechanical contrast in polymer systems. [36][37][38] Based on the PF-QNM maps, on fixed zones of the samples' surfaces we performed force spectroscopy measurements. In force spectroscopy, the cantilever approaches, "pokes…”

Section: Molecularmentioning

confidence: 99%

“…This last value was similar to those found for the formation of LIPSS on PET at comparable irradiation conditions. 37,41 However, by comparing with the formation of LIPSS on the specific PTF terephthalic counterpart,…”

Section: Molecular and Thermal Characterizationmentioning

confidence: 99%

“…In detail, at the bottom and top of the ripples, the sample surface curvature can be considered as flat compared to the tip radius, as previously discussed. 37 Nonetheless, when probing the nanostructures' sides the curvature condition does not hold anymore and, thus, one could calculate unreliable values. As a first quantitative analysis, we compared the mean values of the nanomechanical maps, between the PTF and PTF-LIPSS.…”

Section: Nanomechanical Response Of Nanostructured Filmsmentioning

confidence: 99%

“…This result is in line with previous reports on PF-QNM studies of LIPSS on PET and other polymeric materials. 6,37 To enhance our nanomechanical study, we performed force spectroscopy measurements on selected zones of our samples. In this case, the probe was positioned onto different spots of interest, and force-separation curves were recorded.…”

Section: Nanomechanical Response Of Nanostructured Filmsmentioning

confidence: 99%

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Wrinkling Poly(trimethylene 2,5-Furanoate) Free-standing Films: Nanostructure Formation and Physical Properties

Soccio

Lotti

Munari

et al. 2020

Preprint

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<p>Nanostructured wrinkles were developed on fully bio-based poly(trimethylene furanoate) (PTF) films by using the technique of Laser Induced Periodic Surface Structures (LIPSS). We investigated the effect of irradiation time on wrinkle formation using an UV pulsed laser source, at a fluence of 8 mJ/cm2. It was found that the pulse range between 600 and 4800 pulses allowed formation of periodic nanometric ripples. The nanostructured surface was studied using a combined macro- and nanoscale approach. We evaluated possible physicochemical changes taking place on the polymer surface after irradiation by infrared spectroscopy, contact angle measurements and atomic force microscopy. The macroscopic physicochemical properties of PTF showed almost no changes after nanostructure formation, differently from the results previously found for the terephthalic counterparts, as poly(ethyleneterephthalate), PET, and poly(trimethyleneterephthalate), PTT. The surface mechanical properties of the nanostructured PTF were found to be improved, as evidenced by nanomechanical force spectroscopy measurements. In particular, an increased Young’s modulus and higher stiffness for the nanostructured sample were measured. <br></p>

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Thermomechanical and tribological properties of polyimide and polyethersulfone blends reinforced with expanded graphite particles at various elevated temperatures

Xue

Yan

Chen

2022

J of Applied Polymer Sci

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Expanded graphite (EG) particles were introduced into the polyimide (PI) and polyethersulfone (PES) blend to enhance the dynamic thermomechanical and tribological performances of this polymer composite at evaluated temperatures ranging from room temperature to 250°C. The influences of EG dosage, evaluated temperature and vertical loads on the high‐temperature tribological behaviors, worn surface morphologies and wear mechanisms of EG/PES/PI composites were analyzed. Experimental results suggest that tensile strength, dynamic storage modulus, glass transition temperature as well as thermal stability of EG/PES/PI composites are superior to those of the PES/PI blend and they are raised as the EG additions increase. Whether at room temperature or at the high temperature of 250°C, the EG/PES/PI composites display the better friction‐reducing and abrasion resistant performances than the PES/PI blend. Among all these composites, the 7.0 wt% EG/PES/PI composite demonstrates the best friction and wear properties (0.23, 5.68 × 10−16 m3/[N·m]) at evaluated temperatures. The noticeable improvement in abrasive property of EG/PES/PI composites at high‐evaluated temperatures stems from extraordinary porous microstructures and outstanding lubrication characteristics of EG particles as well as the formation of uniform self‐lubricating polymer tribofilms. This composite as antifriction and wear‐resistant materials possesses potential applications in high‐temperature engineering tribology, such as rolling bearing retainer, and so forth.

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Laterally-resolved mechanical and tribological properties of laser-structured polymer nanocomposites

Cited by 14 publications

References 57 publications

Poly(alkylene 2,5-furanoate)s thin films: Morphology, crystallinity and nanomechanical properties

Poly(alkylene 2,5-furanoate)s thin films: Morphology, crystallinity and nanomechanical properties

Wrinkling Poly(trimethylene 2,5-Furanoate) Free-standing Films: Nanostructure Formation and Physical Properties

Thermomechanical and tribological properties of polyimide and polyethersulfone blends reinforced with expanded graphite particles at various elevated temperatures

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