Magnetically active nanocomposites based on biodegradable polylactide, polycaprolactone, polybutylene succinate and polybutylene adipate terephthalate

Rincón-Iglesias, Mikel; Salado, Manuel; Lanceros‐Méndez, S.; Lizundia, Erlantz

doi:10.1016/j.polymer.2022.124804

Cited by 12 publications

(6 citation statements)

References 60 publications

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“…55 It is important to note that the mechanical performance of the nanocomposite materials remains well above the modulus and ductility shown by conventional thermoplastics such as polybutylene succinate or poly(Llactide), whose modulus hardly goes beyond 2500 MPa and elongation at break is found below 10%. 56 Besides, the observed embrittlement is a common feature in polymer nanocomposites, where a premature fracture is observed due to stress concentration effects at filler-rich regions. 57 The TGA curves of CS/ChNC nanocomposite films at different ChNC concentrations are shown in Figure 7b.…”

Section: Acs Sustainablementioning

confidence: 99%

Chitosan–Chitin Nanocrystal Films from Lobster and Spider Crab: Properties and Environmental Sustainability

Fernández-Marín,

Morales,

Erdocia

et al. 2024

ACS Sustainable Chem. Eng.

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The valorization of chitinous biomass from underutilized renewable carbon feedstock offers alternative routes for bioproduct development, reducing our dependence on nonrenewable and nonbiodegradable materials composed of fossil carbon. This work utilizes crustacean waste consisting of inedible shells to isolate chitin and its derivatives, chitin nanocrystals and chitosan, from lobster (Homarus gammarus) and spider crab (Maja squinado) shells. Chitin nanocrystals (ChNCs) with a degree of acetylation >93% and crystallinity >90% were obtained by demineralization, deproteinization and acid-hydrolysis, while chitosan was obtained by chitin deacetylation. Free-standing chitosan/ChNCs films were then fabricated from lobster and spider crab after dissolution and casting using 1.5% v/v formic acid. Lobster-derived materials exhibited a good balance between UV-shielding ability, blocking >96% of UV-C and UV-B, while being transparent at visible wavelengths. Neat chitosan films are semiductile, with elongations at break >13% and Young's modulus values of 2.3 ± 0.7 and 3.4 ± 1.2 GPa for lobster and spider crab-derived chitosan, respectively. Besides, the incorporation of ChNCs increases the Young's modulus to 5.5 ± 0.8 GPa at 2 wt % for lobster-derived films. Life cycle assessment (LCA) was conducted to quantify the environmental impact of film production and identify process hotspots for future optimization. A carbon footprint of 79.8 kg CO 2 equiv•kg −1 is obtained for chitosan/ChNC films processed using a 100% renewable energy mix. Results demonstrate that lobster-derived materials are relevant contenders toward defossilization by developing renewable-carbon containing bioproducts with competitive performance against fossil-based materials due to their optical and mechanical properties, as well as their potential biodegradability.

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Section: Acs Sustainablementioning

confidence: 99%

Chitosan–Chitin Nanocrystal Films from Lobster and Spider Crab: Properties and Environmental Sustainability

Fernández-Marín,

Morales,

Erdocia

et al. 2024

ACS Sustainable Chem. Eng.

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“…At least two different materials are involved in the development of polymer-based magnetic composites: the magnetic particles (inorganic component) and the polymeric matrix (organic component). Magnetic nanomaterials typically include iron oxides [ 9 , 10 ], cobalt iron oxides [ 11 ], magnetic alloys of nickel, cobalt and/or iron [ 12 ] and rare-earth containing particles [ 13 ], although strong efforts are being devoted to rare-earth free materials. The different types of magnetic materials, their geometry and dimensions, among other conditions, confer the composite distinct magnetic properties, such as superparamagnetism, ferromagnetism (with varying degrees of magnetic hardness) and antiferromagnetism.…”

Section: Introductionmentioning

confidence: 99%

Acrylonitrile Butadiene Styrene-Based Composites with Permalloy with Tailored Magnetic Response

et al. 2023

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This work reports on tailoring the magnetic properties of acrylonitrile butadiene styrene (ABS)-based composites for their application in magnetoactive systems, such as magnetic sensors and actuators. The magnetic properties of the composites are provided by the inclusion of varying permalloy (Py—Ni75Fe20Mo5) nanoparticle content within the ABS matrix. Composites with Py nanoparticle content up to 80 wt% were prepared and their morphological, mechanical, thermal, dielectric and magnetic properties were evaluated. It was found that ABS shows the capability to include high loads of the filler without negatively influencing its thermal and mechanical properties. In fact, the thermal properties of the ABS matrix are basically unaltered with the inclusion of the Py nanoparticles, with the glass transition temperatures of pristine ABS and its composites remaining around 105 °C. The mechanical properties of the composites depend on filler content, with the Young’s modulus ranging from 1.16 GPa for the pristine ABS up to 1.98 GPa for the sample with 60 wt% filler content. Regarding the magnetic properties, the saturation magnetization of the composites increased linearly with increasing Py content up to a value of 50.9 emu/g for the samples with 80 wt% of Py content. A numerical model has been developed to support the findings about the magnetic behavior of the NP within the ABS. Overall, the slight improvement in the mechanical properties and the magnetic properties provides the ABS composites new possibilities for applications in magnetoactive systems, including magnetic sensors, actuators and magnetic field shielding.

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“…The foamed composite displayed a percolation threshold of 0.93 wt.% MWCNT and achieved conductivities of 10 −3 S/m at 4 wt.%. Rincón-Iglesias et al investigated biodegradable polyester/iron oxide composites with filler loadings from 1 to 10 wt.% [ 20 ]. PBS and other polyesters showed very similar performance, with characteristic ferrimagnetic behavior resulting in magnetization with a saturation at around 0.2 T. Saturation values showed good scalability from 0.70 ± 0.1 emu·g −1 at 1 wt.% to 7.1 ± 0.1 emu·g −1 at 10 wt.% loading.…”

Section: Introductionmentioning

confidence: 99%

Poly(Butylene Succinate) Hybrid Multi-Walled Carbon Nanotube/Iron Oxide Nanocomposites: Electromagnetic Shielding and Thermal Properties

et al. 2023

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To address the ever-increasing electromagnetic interference (EMI) pollution, a hybrid filler approach for novel composites was chosen, with a focus on EMI absorbance. Carbon nanofiller loading was limited to 0.6 vol.% in order to create a sustainable and affordable solution. Multiwall carbon nanotubes (MWCNT) and iron oxide (Fe3O4) nanoparticles were mixed in nine ratios from 0.1 to 0.6 vol.% and 8.0 to 12.0 vol.%, respectively. With the addition of surfactant, excellent particle dispersion was achieved (examined with SEM micrographs) in a bio-based and biodegradable poly(butylene succinate) (PBS) matrix. Hybrid design synergy was assessed for EMI shielding using dielectric spectroscopy in the microwave region and transmittance in the terahertz range. The shielding effectiveness (20–52 dB) was dominated by very high absorption at 30 GHz, while in the 0.1 to 1.0 THz range, transmittance was reduced by up to 6 orders of magnitude. Frequency-independent AC electrical conductivity (from 10−2 to 107 Hz) was reached upon adding 0.6 vol.% MWCNT and 10 vol.% Fe3O4, with a value of around 3.1 × 10−2 S/m. Electrical and thermal conductivity were mainly affected by the content of MWCNT filler. The thermal conductivity scaled with the filler content and reached the highest value of 0.309 W/(mK) at 25 °C with the loading of 0.6 vol.% MWCNT and 12 vol.% Fe3O4. The surface resistivity showed an incremental decrease with an increase in MWCNT loading and was almost unaffected by an increase in iron oxide loading. Thermal conductivity was almost independent of temperature in the measured range of 25 to 45 °C. The nanocomposites serve as biodegradable alternatives to commodity plastic-based materials and are promising in the field of electromagnetic applications, especially for EMI shielding.

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Magnetically active nanocomposites based on biodegradable polylactide, polycaprolactone, polybutylene succinate and polybutylene adipate terephthalate

Cited by 12 publications

References 60 publications

Chitosan–Chitin Nanocrystal Films from Lobster and Spider Crab: Properties and Environmental Sustainability

Chitosan–Chitin Nanocrystal Films from Lobster and Spider Crab: Properties and Environmental Sustainability

Acrylonitrile Butadiene Styrene-Based Composites with Permalloy with Tailored Magnetic Response

Poly(Butylene Succinate) Hybrid Multi-Walled Carbon Nanotube/Iron Oxide Nanocomposites: Electromagnetic Shielding and Thermal Properties

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