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Open AccessArticle

Dog Wool Microparticles/Polyurethane Composite for Thermal Insulation

Post-graduate Program in Mechanical Engineering (PPGEM), Department of Mechanical Engineering, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil
Foundation for the Promotion of Research of the State of Rio Grande do Norte–FAPERN, Natal 59064-901, Brazil
2C2T-Centro de Ciência e Tecnologia Têxtil, Universidade do Minho, Campus of Azurém, 4804-533 Guimarães, Portugal
Textile Engineering Department, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil
Author to whom correspondence should be addressed.
Polymers 2020, 12(5), 1098;
Received: 10 April 2020 / Revised: 8 May 2020 / Accepted: 9 May 2020 / Published: 11 May 2020
(This article belongs to the Special Issue Natural Fibres and their Composites)
A polyurethane (PU)-based eco-composite foam was prepared using dog wool fibers as a filler. Fibers were acquired from pet shops and alkaline treated prior to use. The influence of their incorporation on the PU foams’ morphological, thermal, and mechanical properties was investigated. The random and disorganized presence of the microfibers along the foam influence their mechanical performance. Tensile and compression strengths were improved with the increased amount of dog wool microparticles on the eco-composites. The same occurred with the foams’ hydration capacity. The thermal capacity was also slightly enhanced with the incorporation of the fillers. The fillers also increased the thermal stability of the foams, reducing their dilatation with heating. The best structural stability was obtained using up to 120 °C with a maximum of 15% of filler. In the end, the dog wool waste was rationally valorized as a filler in PU foams, demonstrating its potential for insulation applications, with a low cost and minimal environmental impact. View Full-Text
Keywords: dog wool fibers; fillers; polyurethane; eco-composites; renewable resources dog wool fibers; fillers; polyurethane; eco-composites; renewable resources
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MDPI and ACS Style

Claudivan da Silva, F.; Felgueiras, H.P.; Ladchumananandasivam, R.; Ubiragi L. Mendes, J.; de O. Souto Silva, K.K.; Zille, A. Dog Wool Microparticles/Polyurethane Composite for Thermal Insulation. Polymers 2020, 12, 1098.

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