Dog Wool Microparticles/Polyurethane Composite for Thermal Insulation

Silva, Francisco Claudivan da; Felgueiras, Helena P.; Ladchumananandasivam, Rasiah; Mendes, J. U. L.; Silva, Késia Karina de O. Souto; Zille, Andrea

doi:10.3390/polym12051098

Cited by 7 publications

(3 citation statements)

References 43 publications

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“…Hence, due to its similarities with dog wool from Serra da Estrela , it was decided to use this same treatment. On the other hand, Claudivan da Silva et al [ 23 ] used the NaOH treatment applied to dog fur. The procedures adopted for these two treatments were adaptations of the descriptions found in the literature.…”

Section: Methodsmentioning

confidence: 99%

Viability Study of Serra da Estrela Dog Wool to Produce Green Composites

Gomes,

Fiadeiro,

Vieira

et al. 2024

Polymers

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The environmental emergency has alerted consumers and industries to choose products derived from renewable sources over petroleum derivatives. Natural fibers of plant origin for reinforcing composite materials dominate the field of research aiming to replace synthetic fibers. The field of application of green dog wool composite materials needs to be reinforced and proven, as the industry is looking for more sustainable solutions and on the other hand this type of raw material (pet grooming waste) tends to grow. Hence, in the present work, the feasibility of applying natural fibers of dog origin (mainly composed by keratin) in green composites was studied. The green composites were developed using chemically treated dog wool of the breed Serra da Estrela (with NaOH and PVA) as reinforcement and a green epoxy resin as a matrix. The chemical treatments aimed to improve adhesion between fibers and matrix. The fibers’ composition was determined using X-ray Diffraction (X-RD). Their morphology was determined using a scanning electron microscope (SEM). The wettability of the fiber was also evaluated qualitatively by analyzing drops of resin placed on the fibers treated with the different treatments. The mechanical properties of the composites were also studied through mechanical tensile, flexural, and relaxation tests. Overall, the best results were obtained for the dog wool fibers without treatment. The tensile and flexural strength of this biocomposite were 11 MPa and 26.8 MPa, respectively, while the tensile and flexural elastic modulus were 555 MPa and 1100 MPa, respectively. It was also possible to verify that the PVA treatment caused degradation of the fiber, resulting in a decrease in mechanical tensile strength of approximately 42.7%, 59.7% in flexural strength and approximately 59% of the stress after 120 min of relaxation when compared to fiber made from untreated dog wool. On the other hand, the NaOH treatment worked as a fiber wash process, removing waxes and fats naturally present on the fiber surface.

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Section: Methodsmentioning

confidence: 99%

Viability Study of Serra da Estrela Dog Wool to Produce Green Composites

Gomes,

Fiadeiro,

Vieira

et al. 2024

Polymers

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“…In order to obtain stable PUR foams, 60% of sucrose-based polyol was incorporated. 1 Parts by total weight of polyols.…”

Section: Methodsmentioning

confidence: 99%

“…It is estimated that within 10 years, global energy consumption will increase by ~50% [ 1 ]. In order to reduce energy demands and greenhouse gas emissions, the easiest way to do so is through thermal insulation of buildings.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Performance of Bio-Based Rigid Polyurethane Foam with High Amounts of Sunflower Press Cake Particles

et al. 2021

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In the current study, rigid polyurethane foam (PUR) was modified with 10–30 wt.% sunflower press cake (SFP) filler, and its effect on performance characteristics—i.e., rheology, characteristic foaming times, apparent density, thermal conductivity, compressive strength parallel and perpendicular to the foaming directions, tensile strength, and short-term water absorption by partial immersion—was evaluated. Microstructural and statistical analyses were implemented as well. During the study, it was determined that 10–20 wt.% SFP filler showed the greatest positive impact. For instance, the thermal conductivity value improved by 9% and 17%, respectively, while mechanical performance, i.e., compressive strength, increased by 11% and 28% in the perpendicular direction and by 43% and 67% in the parallel direction. Moreover, tensile strength showed 49% and 61% increments, respectively, at 10 wt.% and 20 wt.% SFP filler. Most importantly, SFP filler-modified PUR foams were characterised by two times lower water absorption values and improved microstructures with a reduced average cell size and increased content in closed cells.

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Wool in composites: wool fiber as a component in biocomposites

Mianehro,

Montazer

2024

The Wool Handbook

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Dog Wool Microparticles/Polyurethane Composite for Thermal Insulation

Cited by 7 publications

References 43 publications

Viability Study of Serra da Estrela Dog Wool to Produce Green Composites

Viability Study of Serra da Estrela Dog Wool to Produce Green Composites

Evaluation of the Performance of Bio-Based Rigid Polyurethane Foam with High Amounts of Sunflower Press Cake Particles

Wool in composites: wool fiber as a component in biocomposites

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