Photocurable magnetic materials with tailored functional properties

Mendes‐Felipe, Cristian; Díez, Ander García; Salazar, Daniel; Vilas-Vilela, José Luis; Lanceros‐Méndez, S.

doi:10.1016/j.jcomc.2021.100143

Cited by 8 publications

(17 citation statements)

References 71 publications

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“…[23][24][25] However, there are just few studies focusing on the photopolymerization of composite materials based on natural sources, mainly due to light absorption and viscosity issues that hinder a proper and efficient curing process. [26] As examples, urethane acrylate pre-polymer has been synthesized with castor oil and mixed with modified zinc oxide nanoparticles to increase its glass transition temperature. [27] Acrylated epoxidized linseed oil has been also used together with anatase titanium dioxide nanoparticles for the preparation of mechanically reinforced coatings with antimicrobial behavior.…”

Section: Introductionmentioning

confidence: 99%

Bio‐Based Piezo‐ and Thermoresistive Photocurable Sensing Materials from Acrylated Epoxidized Soybean Oil

Mendes‐Felipe

Roppolo

Sangermano

et al. 2022

Macro Materials & Eng

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Bio-based photocurable polymers are increasingly in demand as environmentally friendly materials for advanced applications. Together with functional fillers, these represent a next step for the generation of functional and active smart materials, compatible with additive manufacturing technologies. Herein, acrylated epoxidized soybean oil (AESO) mixed with different amounts of reduced graphene oxide (rGO) up to 6 wt% in order to obtain UV-curable piezoresistive and thermoresistive materials, is reported. It is shown that the addition of rGO to AESO hinders the curing process, but always maintains double bond conversions higher than 50%. Composites are characterized by a good dispersion of micrometric filler clusters. Further, the thermal stabilities are close to 300 °C and crosslinking degrees are above 1.75 mmol cm -3 . The Young modulus of the composites decreases with the addition of the rGO fillers, in particular for the higher filler contents, and electrical conductivities up to 0.13 S m -1 are obtained for the composites with the highest rGO content. UV-curable composites with piezoresistive and thermoresistive responses suitable for applications are thus obtained, characterized by gauge factors around 26 for deformations up to 2% and maximum thermoresistive sensitivity of S = 0.43, values similar to the values obtained for petroleum-based materials.

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Section: Introductionmentioning

confidence: 99%

Bio‐Based Piezo‐ and Thermoresistive Photocurable Sensing Materials from Acrylated Epoxidized Soybean Oil

Mendes‐Felipe

Roppolo

Sangermano

et al. 2022

Macro Materials & Eng

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“…No significant alteration of the morphology of the polymer seems to occur. This is important since the morphology variations of the polymer have strong influence on the mechanical properties 16 and typically depend on filler type and size 17 . No significant differences in filler distribution have been observed when different magnetic particles have been used.…”

Section: Resultsmentioning

confidence: 99%

“…31 Furthermore, 35 nm seems to be the critical size for which the CoFe 2 O 4 particles become single-domain. 16,32 The used powder contains particles in the range of 35-55 nm, and therefore most of the cobalt particles are probably in a multi-domain type.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Tuning magnetorheological functional response of thermoplastic elastomers by varying soft‐magnetic nanofillers

Tubío

2022

Polymers for Advanced Techs

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Magnetorheological elastomers (MREs) are increasingly demanded based on their ability to modify their mechanical properties under an applied magnetic field, applications ranging from active control in industrial processes to biomedicine. Those materials are based on a polymer phase and magnetic fillers. This work reports on the evaluation of the effect of the magnetic filler characteristics on the physical-chemical and functional performance of MREs. Composites have been produced with 20 wt% concentration of six different magnetic fillers: CoFe 2 O 4 , Fe 3 O 4 , Co, Ni, and Ni 80 Fe 17 Mo 3 (Permalloy) in a SEBS matrix. Elastic modulus increases from 0.7 MPa for the pristine polymer to a maximum value of 1.8 MPa for the sample with Fe 3 O 4 .The highest saturation magnetization being obtained for the composite containing magnetite, with 17.8 A m 2 kg À1 . The filler size, saturation magnetization and coercivity all have significant impact on the magnetorheological (MR) effect. The highest MR effect is achieved when using Fe 3 O 4 nanoparticles (17%), followed by Co (16%), Ni (14%), CoFe 2 O 4 (11%), and finally Permalloy (8%). For the Fe 3 O 4 @SEBS composite, the MR response is among the largest reported in the literature but with a much lower filler content (6 vol% versus more than 20 vol%), with a positive effect on processability and integration into devices.

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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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Photocurable magnetic materials with tailored functional properties

Cited by 8 publications

References 71 publications

Bio‐Based Piezo‐ and Thermoresistive Photocurable Sensing Materials from Acrylated Epoxidized Soybean Oil

Bio‐Based Piezo‐ and Thermoresistive Photocurable Sensing Materials from Acrylated Epoxidized Soybean Oil

Tuning magnetorheological functional response of thermoplastic elastomers by varying soft‐magnetic nanofillers

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

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