Urea Formaldehyde
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. PHYSICAL AND MECHANICAL PROPERTIES OF PARTICLEBOARD FROM Eucalyptus grandis PRODUCED BY UREA FORMALDEHYDE RESIN WITH SiO2 NANOPARTICLES
ABSTRACT The use of nanoparticles appears to be a feasible option for improving the quality of a range of wood-based products. Studies show that they can improve both the physical and mechanical properties of wood and wood-based products. This preliminary study aimed to analyze the influence of SiO2 nanoparticles on the physical and mechanical properties of
Eng. Agríc.. Publicado em: 2020-06
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2. Strength and Stiffness of Cross Laminated Timber (CLT) panels produced with Pinus and Eucalyptus: experimental and analytical comparisons
ABSTRACT The CLT is a building material that comes mainly used in Europe where it was developed. Lightweight, sturdy and eco-friendly, this material has become one of the most important constructive methods in the world. CLT are panels formed by layers of wood glued to each other orthogonally, always in odd numbers, symmetrical with respect to the central la
Matéria (Rio J.). Publicado em: 25/11/2019
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3. Painéis de pínus e bagaço de cana empregando-se dois adesivos para uso na construção civil
Resumo O presente trabalho objetivou produzir e avaliar painéis aglomerados empregando-se partículas de bagaço de cana-de-açúcar (Saccharum officinarum) e de pínus (Pinus taeda, Pinus elliottii), comparando-se a eficiência de dois adesivos, ureia-formaldeído e poliuretano derivado do óleo de mamona. Os painéis foram preparados com 60% de partícula
Ambient. constr.. Publicado em: 03/10/2019
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4. THERMAL MODIFICATION OF SUGARCANE WASTE AND BAMBOO PARTICLES FOR THE MANUFACTURE OF PARTICLEBOARDS
RESUMO A modificação térmica de partículas de painéis constituídos de resíduos agroflorestais e industriais pode incorporar melhorias na estabilidade dimensional (variação na espessura) e reduzir a utilização de produtos químicos, que podem onerar o processo ou serem nocivos ao homem e ao meio ambiente. Assim, o objetivo da pesquisa foi avaliar o
Rev. Árvore. Publicado em: 23/09/2019
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5. THE EFFECT OF CELLULOSE NANOCRYSTALS IN SUGARCANE BAGASSE PARTICLEBOARDS OF PITH AND FIBERS
ABSTRACT The aim of this research was to investigate sugarcane bagasse (SCB) particleboards, using two kinds of particles, from pith and fibers, reinforced with cellulose nanocrystals (NCC). The NCCs were dispersed in the adhesive urea formaldehyde (UF) using a sonificator in two proportions (0 and 1%). The NCCs and UF were applied in the SCB particles using
CERNE. Publicado em: 09/09/2019
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6. Carbonyl compounds in wine: factors related to presence and toxic effects
RESUMO: O objetivo deste estudo foi revisar os fatores tecnológicos e toxicológicos relacionados à presença de compostos carbonílicos encontrados em vinhos, incluindo acetaldeído, formaldeído, acroleína, carbamato de etila (CE) e furfural. O acetaldeído e o formaldeído podem ser formados através da oxidação do etanol e do metanol, respectivament
Cienc. Rural. Publicado em: 29/07/2019
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7. Strength and Stiffness of Cross Laminated Timber (CLT) panels produced with Pinus and Eucalyptus: experimental and analytical comparisons
ABSTRACT The CLT is a building material that comes mainly used in Europe where it was developed. Lightweight, sturdy and eco-friendly, this material has become one of the most important constructive methods in the world. CLT are panels formed by layers of wood glued to each other orthogonally, always in odd numbers, symmetrical with respect to the central la
Matéria (Rio J.). Publicado em: 10/06/2019
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8. Propriedades de adesivo aplicado em painéis a partir da substituição por lignossulfonato do processo sulfito
Resumo Considerando a indústria de painéis aglomerados, a maior parte utiliza adesivos sintéticos, especialmente, à base de ureia-formaldeído, e nesse sentido, estudos que englobam as características de materiais alternativas para a indústria de painéis tornam-se importantes, especialmente quando se considera o custo final dos produtos gerados. O pre
Ciênc. Florest.. Publicado em: 30/05/2019
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9. Does the Addition of Cotton Wastes Affect the Properties of Particleboards?
ABSTRACT A wide range of materials for the development of new products can be obtained from natural resources. Good examples of these materials are lignocellulosic wastes, which are a good alternative for the production of particleboards. This study aimed to evaluate the feasibility of using cotton wastes in association to eucalyptus particles in the produc
Floresta Ambient.. Publicado em: 04/04/2019
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10. Pure and Decorative Plywood Panels from Cordia trichotoma and Grevillea robusta
ABSTRACT The objective of this study was to evaluate the technical viability of Cordia trichotoma and Grevillea robusta wood for the production of plywood panels, as well as to verify the behavior of these species in combination with Pinus taeda and Eucalyptus saligna. Panels were produced using veneers of each species and in combination, totaling 8 treatme
Floresta Ambient.. Publicado em: 26/07/2018
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11. Particleboard Panels Produced with Different Radial Positions of Pinus oocarpa Wood
ABSTRACT The aim of this study was to evaluate the effect of different radial regions of Pinus oocarpa wood on the physical and mechanical properties of particleboard panels. Three different radial regions (internal, intermediate and external) and the mixture (integral log) were assessed. Experimental panels were produced with a nominal density of 0.70 g/cm3
Floresta Ambient.. Publicado em: 01/02/2018
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12. Differential Scanning Calorimetry study on curing kinetics of diglycidyl ether of bisphenol A with amine curing agents for self-healing systems
ABSTRACT Epoxy resin is one of the most important polymeric matrixes for diverse uses, such as aeronautical, mobile, electronics and others. Providing a material capable of self-healing microcracks will allow it to have a more reliable and longer use. In order to study this new property of self-healing to an epoxy resin, a Differential Scanning Calorimetry (
Matéria (Rio J.). Publicado em: 20/07/2017