Formaldehyde-free particleboards using natural latex as the polymeric binder

Author(s)

Nakanishi, Erika Yukari ^[1] ; Cabral, Matheus Roberto ^[1] ; Goncalves, Paulo de Souza ^[2] ; dos Santos, Valdemir ^[1] ; Savastano Junior, Holmer ^[1]

Affiliation

^[1] Univ Sao Paulo, Res Nucleus Mat Biosyst BioSMat, Fac Anim Sci & Food Engn FZEA, Az Duque Caxias Norte 225, BR-13635900 Pirasununga, SP - Brazil

^[2] Rubber Res Adv Ctr CAPSA, Agron Inst Campinas IAC, Av Barao Itapura 1481, BR-13601970 Campinas, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF CLEANER PRODUCTION; v. 195, p. 1259-1269, SEP 10 2018.
• Web of Science Citations: 6

Abstract

Commercial binders based on formaldehyde are the main adhesive to produce particleboards, however, these binders are harmful to human health and the environment. In this scenario, alternative binders are a possibility to reduce the formaldehyde content in the particleboards. Therefore, the focus of this original scientific study is to explore the thermal, physical and mechanical properties of particleboards produced with natural rubber latex as a potential polymeric binder. Bagasse-latex particleboard (BLP) with nominal density of 800 kg/m(3), with different latex content. 28% (BLP-28), 42% (BLP-42) and 56% (BLP-56) by mass were evaluated. The quality of the particleboards produced was assessed by determining their thermal, physical and mechanical properties. The formation process of interfacial structure between sugarcane bagasse and latex was observed, configuring the adhesion of the two phases. The thermal conductivity of all the particleboard formulations showed attractive performance as thermal insulating material, considering that these are medium to high nominal density particleboards. According to physical tests, higher latex contents in the particleboard did not affect the density, however, it created a binder protection against water absorption. Contrarily, an increase in the latex content (as in BLP-56 formulation) did not cause increase in the mechanical properties under flexural loading. The BLP-42 particleboards performed better mechanically based on modulus of rupture (MOR) and modulus of elasticity (MOE) with average values of 6.32 MPa and 1275 Mpa, respectively. These results indicated the potential use of latex natural rubber as an alternative to produce insulation particleboards in civil construction. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 13/23810-8 - Study of cementitious matrices with agroindustrial ashes and vegetable fibers for fibre-cement
• Grantee: Valdemir dos Santos
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 16/07372-9 - Particleboard based on biomaterials with functional gradation for using as piglet shelter
• Grantee: Erika Yukari Nakanishi
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 12/51467-3 - Agroindustrial wastes and their potential use as appropriate materials for housing and infraestructure (Agrowaste)
• Grantee: Holmer Savastano Junior
• Support Opportunities: Research Projects - Thematic Grants