Nanocomposite and biodegradable polymers applied to technical textiles

Caicedo, Carolina; Melo-López, Leticia; Cabello-Alvarado, C.; Crúz-Delgado, Víctor J.; Orta, Carlos Alberto Ávila

doi:10.15446/dyna.v86n211.80230

Cited by 6 publications

(3 citation statements)

References 88 publications

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“…Brostow et al demonstrated that, within the materials universe, there exists a relationship between the resistance to deformation of a material, which is related to E′, the deformation at break (εb) and the brittleness (B) [ 48 ]. This approach uses the results obtained in the quasi-static tensile tests and dynamic mechanical tests and verifies that a material with a high deformation at break will be less brittle.…”

Section: Resultsmentioning

confidence: 99%

Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

et al. 2020

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One of the critical processing parameters—the speed of the extrusion process for plasticized poly (lactic acid) (PLA)—was investigated in the presence of acetyl tributyl citrate (ATBC) as plasticizer. The mixtures were obtained by varying the content of plasticizer (ATBC, 10–30% by weight), using a twin screw extruder as a processing medium for which a temperature profile with peak was established that ended at 160 °C, two mixing zones and different screw rotation speeds (60 and 150 rpm). To evaluate the thermo-mechanical properties of the blend and hydrophilicity, the miscibility of the plasticizing and PLA matrix, Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), oscillatory rheological analysis, Dynamic Mechanical Analysis (DMA), mechanical analysis, as well as the contact angle were tested. The results derived from the oscillatory rheological analysis had a viscous behavior in the PLA samples with the presence of ATBC; the lower process speed promotes the transitions from viscous to elastic as well as higher values of loss modulus, storage modulus and complex viscosity, which means less loss of molecular weight and lower residual energy in the transition from the viscous state to the elastic state. The mechanical and thermal performance was optimized considering a greater capacity in the energy absorption and integration of the components.

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Section: Resultsmentioning

confidence: 99%

Effect of Extrusion Screw Speed and Plasticizer Proportions on the Rheological, Thermal, Mechanical, Morphological and Superficial Properties of PLA

et al. 2020

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“…It represents an advantage for applications that require biostability for long periods [166] - [168].…”

Section: Nanohybrid Systems (Polymers -Nanoparticles)mentioning

confidence: 99%

Use of nanoparticles to improve thermochemical resistance of synthetic polymer to enhanced oil recovery applications: a review

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et al. 2020

CT&F Cienc. Tecnol. Futuro

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Partially Hydrolyzed Polyacrylamide (HPAM) is the polymer most used in chemical enhanced oil recovery (cEOR) processes and it has been implemented in several field projects worldwide. Polymer injection has shown to be an effective EOR process. However, it has not been implemented massively due to HPAM polymer's limitations, mostly related to thermal and chemical degradation caused by exposure at high temperatures and salinities (HTHS). As an alternative, a new generation of chemically stable monomers to improve the properties of HPAM has been assessed at laboratory and field conditions. However, the use of enhanced polymers is limited due to its larger molecular size, large-scale production, and higher costs. One of the alternatives proposed in the last decade to improve polymer properties is the use of nanoparticles, which due to their ultra-small size, large surface area, and highly reactive capacity, can contribute to reduce or avoid the degrading processes of HPAM polymers. Nanoparticles (NPs) can be integrated with the polymer in several ways, it being worth to highlight mixing with the polymer in aqueous solution or inclusion by grafting or chemical functionalization on the nanoparticle surface. This review focuses on hybrid nanomaterials based on SiO2 NPs and synthetic polymers with great EOR potential. The synthesis process, characterization, and the main properties for application in EOR processes, were reviewed and analyzed. Nanohybrids based on polymers and silica nanoparticles show promising results in improving viscosity and thermal stability compared to the HPAM polymer precursor. Furthermore, based on recent findings, there are great opportunities to implement polymer nanofluids in cEOR projects. This approach could be of value to optimize the technical-economic feasibility of projects by reducing the polymer concentration of using reasonable amounts of nanoparticles. However, more significant efforts are required to understand the impact of nanoparticle concentrations and injection rates to support the upscaling of this cEOR technology.

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“…22,23 However, PS nanospheres contain benzene rings, which strongly absorb ultraviolet (UV) light, leading to a decreased weather resistance of the assembled PCs. Also, the presence of benzene rings makes PS nanospheres difficult to undergo natural degradation, 24,25 which is not conducive to sustainable development of textiles. In view of the above background, the PMMA nanospheres are expected to replace SiO 2 and PS as the assembly blocks of PCs suitable for textile coloration at an industrial scale.…”

Section: Introductionmentioning

confidence: 99%