Design of Multifunctional Composites: New Strategy to Save Energy and Improve Mechanical Performance

Guadagno, Liberata; Sorrentino, Andrea; Delprat, Patrick; Vertuccio, Luigi

doi:10.3390/nano10112285

Cited by 20 publications

(11 citation statements)

References 70 publications

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“…It is worth noting that for the formulated nanocomposites, increasing the percentage of MWCNTs consistently changes the chemical nature of the hosting matrix, as MWCNT are added together with the masterbatch matrix, which is chemically different from the nanocomposite matrix. It is very likely that deviations from the expected profile based on the percolation theory described in the related section of the Supplementary Materials and by other authors in literature [ 19 , 22 , 27 ] are due to this occurrence, which is not common in scientific manuscripts on this topic. This deviation is consistently observed for the TPU(x) system, for which no plateau condition is reached in the log scale [ 28 , 29 , 30 ].…”

Section: Resultsmentioning

confidence: 89%

“…Recently proposed de-icing strategies based on innovative solutions have exploit the functional properties of conductive nanoparticles to reduce the weight of bulk materials in the field of civil engineering and aeronautics, in the latter case leading to a reduction in fuel consumption and pollutants [ 1 , 3 ]. The employed nanoparticles, namely, carbon nanotubes and graphene-based nanoparticles, confer other desirable applicative functionalities to the host polymeric matrices: (i) they are capable of increasing the durability of polymeric materials, which are vulnerable to sunlight [ 8 , 9 , 10 , 11 ]; (ii) they are able to enhance mechanical, electromagnetic, and dielectric properties [ 12 , 13 , 14 , 15 , 16 , 17 , 18 ]; (iii) they are well suited to revolutionizing manufacturing processes to save considerable amounts of energy [ 19 ]; and (iv) they are able to increase the adhesion properties of polymers by using carbon fabric as a filler in structural components [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

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Effective Practical Solutions for De-Icing of Automotive Component

Tinti¹,

Carallo

Greco

et al. 2022

Nanomaterials

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Carbon Nanotube (CNTs)-based masterbatches have been mixed with thermoplastic polymers currently used to manufacture automotive components. These mixtures have been tailored to integrate an effective heating function in the materials. The manufacturing method for composite compounding and processing conditions significantly affects the electrical resistivity of the developed materials. The resistivity of the material can be controlled within tight tolerances sufficient to meet automotive requirements. The optimal compounding parameters of the melt process technologies were defined to obtain uniform filler dispersion and distribution. Heating and de-icing tests were performed on sheet specimens with optimized CNT content and electrical conductivity suitable for effective electro-thermal behaviour with low input voltages (≤24 V DC), making them safe for users. Finally, a simplified analytical model of the Joule effect arising from an energy balance of the system under study (heat equation) was developed and validated by comparison with experimental data for use in future development for the purpose of the preliminary design of components in the automotive sector.

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Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Effective Practical Solutions for De-Icing of Automotive Component

Tinti¹,

Carallo

Greco

et al. 2022

Nanomaterials

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“…A problem encountered in the design of self-healing materials based on reversible interactions is the lack of good mechanical properties. In order to overcome this no-trivial issue, several approach strategies have been proposed and, among these, an important role is played by those involving the use of polymers combined with nanofillers, which allow to producing new self-responsive multifunctional materials having high mechanical performance [9][10][11][12][13][14][15][16][17][18][19][20][21]. A similar auto-repair approach can be integrated in commercial biodegradable polymers, having excellent gas barrier properties [22][23][24][25], which can be modified to favor the activation of self-healing mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Design of self-healing biodegradable polymers

Guadagno

Raimondo

Catauro

et al. 2022

J Therm Anal Calorim

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A biodegradable thermoplastic polymer has been formulated by solubilizing Murexide (M) salts in a commercial biodegradable vinyl alcohol copolymer (HVA). The Murexide has been employed as a self-healing filler with the aim to impart the auto-repair ability to the formulated material. Three different percentages (1, 3, and 5 mass%) of filler have been solubilized in HVA to evaluate the effect of the filler concentration on the thermal and self-healing properties of the resulting polymeric materials. The samples have been thermally characterized by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analyses (TGA), while their self-healing ability has been evaluated through the estimation of the storage modulus recovery, measured by Dynamic Mechanical Analysis (DMA). The results of DSC analysis have highlighted that the increase of the amount of Murexide anticipates the thermal events such as glass transition, crystallization and melting. TGA measurements have evidenced that, although there is a reduction of thermal stability of the materials in the presence of a high concentration of M, the polymer still remains stable up to 270 °C. Healing efficiency higher than 80%, at a temperature beyond 60 °C, has been detected for the samples loaded with 3 and 5 mass% of Murexide, thus confirming the efficacy of this compound as an auto-repair agent and the relationship between the self-healing efficiency and its amount. For a temperature lower than 70 °C, the healing tests, carried out at different values of tensile deformation frequency, have highlighted a frequency-dependent healing efficiency. This dependence becomes negligible at higher temperatures for which the healing efficiency approaches the value of 100%.

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“…The automotive industry is known to be the largest consumer of materials, using and integrating products from all branches of modern industry: metallurgy, chemistry, textiles, electronics, etc. In this context, the optimal selection and use of materials is done by taking into account their performance, environmental impact, and cost [ 1 , 2 , 3 ]. The expectations to extend the lifetimes of cars, to increase external insulation to dampen noise and vibration, and to absorb the kinetic energy of impacts in the event of collisions are just some of the challenges facing the automotive industry [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry

et al. 2022

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Methods to predict the fracture of thin carbon fibre-reinforced polymers (CFRPs) under load are of great interest in the automotive industry. The manufacturing of composites involves a high risk of defect occurrence, and the identification of those that lead to failure increases the functional reliability and decreases costs. The performance of CFRPs can be significantly reduced in assembled structures containing stress concentrators. This paper presents a hybrid experimental–numerical method based on the Tsai–Hill criterion for behavior of thin CFRPs at complex loadings that can emphasize the threshold of stress by tracing the σ-τ envelope. Modified butterfly samples were made for shearing, traction, or shearing-with-traction tests in the weakened section by changing the angle of force application α. ANSYS simulations were used to determine the zones of maximum stress concentration. For thin CFRP samples tested with stacking sequences [0]8 and [(45/0)2]s, the main mechanical characteristics have been determined using a Dynamic Mechanical Analyzer (DMA) and ultrasound tests. A modified Arcan device (AD) was used to generate data in a biaxial stress state, leading to the characterization of the material as a whole. The generated failure envelope allows for the prediction of failure for other combinations of normal and shear stress, depending on the thickness of the laminations, the stacking order, the pretension of the fasteners, and the method used to produce the laminations. The experimental data using AD and the application of the Tsai–Hill criterion serve to the increase the safety of CFRP components.

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Design of Multifunctional Composites: New Strategy to Save Energy and Improve Mechanical Performance

Cited by 20 publications

References 70 publications

Effective Practical Solutions for De-Icing of Automotive Component

Effective Practical Solutions for De-Icing of Automotive Component

Design of self-healing biodegradable polymers

Multi-Criteria Evaluation of the Failure of CFRP Laminates for Frames in the Automotive Industry

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