The role of sucrose in amino polymers synthesized by the strongly acid process

Costa, Nuno; Pereira, João; Ferra, João; Cruz, Paulo; Moreira, J. Agostinho; Martins, Jorge; Magalhães, Fernão D.; Mendes, Adélio; Carvalho, Luísa

doi:10.1080/01694243.2012.727150

Cited by 14 publications

(12 citation statements)

References 26 publications

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“…In the last decades, several studies using formaldehyde scavengers have been published (Eom et al 2006;Kim et al 2006;Kim 2009;Costa et al 2013a, b), as well as on resin synthesis optimization for low formaldehyde emission wood-based panels (Ferra et al 2010;Costa et al 2012;Paiva et al 2012), some of them with notable success, reaching formaldehyde emission near solid wood level and also zero emission. Some innovative works studied new formaldehyde-free adhesives, but their difficult application (Prasittisopin and Li 2010) and low reactivity (Despres et al 2010;Tang et al 2011) lead to high pressing times and lower productivity, having no acceptance in the industry.…”

Section: Introductionmentioning

confidence: 99%

The influence of scavengers on VOC emissions in particleboards made from pine and poplar

Costa

Ohlmeyer

Ferra³

et al. 2013

Eur. J. Wood Prod.

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This paper studies the performance of scavengers on Volatile Organic Compound (VOC) emissions from wood-based composites. Particleboards made from maritime pine (Pinus Pinaster Ait.) and European poplar (Populus spp.) were produced with a UF resin doped with melamine and two scavengers, sodium metabisulfite and urea. VOC emission was measured according to EN ISO 16000. Particleboards made from pine present much higher total VOC (TVOC) emissions than boards made from poplar. Pine emits a higher amount of terpenes, but also aldehydes, acids and terpenoids, while poplar emits mainly acetic acid. Sodium metabisulfite showed an excellent ability to reduce aldehydes emission, which represents nearly 50 % of total emission of particleboards made from pine. When sodium metabisulfite was applied to particleboards made from poplar, reduction of TVOCs was not significant due to the low contribution of aldehydes to TVOCs. Urea presents a low reduction in TVOCs for both wood species.2

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Section: Introductionmentioning

confidence: 99%

The influence of scavengers on VOC emissions in particleboards made from pine and poplar

Costa

Ohlmeyer

Ferra³

et al. 2013

Eur. J. Wood Prod.

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“…It is rich in hydroxyl groups, which can react with amino or formaldehyde groups (Costa et al 2013). Technically, sucrose can be a good modifier for MF resin to reduce the condensation time because the hydroxyl group of sucrose can form covalent bonds with MF resin (Gindl and Jeronimidis 2004;Chen et al 2007;He et al 2009;Song et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…As a result, MF resin modified by tannin and carbohydrates has shown potential to be used as wood adhesive (Holmberg 1982;Gindl and Jeronimidis 2004;He et al 2009;Kohlmayr et al 2012;Costa et al 2013;Gangi et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Sucrose-Melamine-Formaldehyde Adhesives

Gan¹,

Yang²,

Zhang³

et al. 2016

BioResources

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The objective of this project was to use sucrose as a partial substitute for melamine in the synthesis of sucrose-melamine-formaldehyde (SMF) resin. The SMF was synthesized in a base condition. The wet bonding strength, shelf life, and formaldehyde emission of the SMF resin were determined. Fourier transform infrared spectroscopy (FT-IR) and mass spectroscopy (MS) were employed to analyze the chemical structure of the SMF resin. The shelf life of SMF resin increased as the sucrose content increased. Also as the sucrose content increased, the wet bonding strength decreased and the formaldehyde emissions decreased. The FT-IR and MS spectra revealed the structures of sucrose, melamine, and formaldehyde in the SMF, and chemical reactions of SMF resins occurred between the three primary hydroxyl groups of sucrose and methylolmelamine. Based on the results of this study, a sucrose to melamine mole ratio of 0.4:1 was determined to be the optimal ratio for the SMF resin.

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“…However, environmental requirements, such as stringent formaldehyde emission regulations , and new product specification, have forced producers to find new tailor-made gluing solution, without losing productivity and quality (Eom et al 2006;Kim et al 2006;Kumar et al 2007;Ferra et at. 2010;Costa et al 2012;Costa et al 2013a;Paiva et al 2012). Innovative formaldehydefree adhesives have also been studied, but lower reactivity, higher price or difficult application did not convince the industrial producers (Despres et al 2008;Despres et al 2010;Prasittisopin and Li 2010;Amasio et al 2011;Tang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Impact of thermal treatment on bonding performance of UF/PVAc formulations

Costa

Ferra²,

Martins

et al. 2014

International Wood Products Journal

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Polyvinyl acetate (PVAc) adhesives present several advantages: ready to use, short setting time, flexible joint, easy to clean and long storage life. On the other hand, formaldehyde-based adhesives are less expensive and give a rigid bond.In this work, the combination of a PVAc glue and UF resin for surfacing MDF with wood veneer was assessed. The reactivity of different mixing ratios was evaluated using ABES (automated bonding evaluation system) machine as well as the wettability of beech veneers after different heat pre-treatments. The obtained results have shown that a mixture of PVAc/UF could be used for surfacing MDF with beech veneer without loss of mechanical properties, when compared with pure PVAc.

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The role of sucrose in amino polymers synthesized by the strongly acid process

Cited by 14 publications

References 26 publications

The influence of scavengers on VOC emissions in particleboards made from pine and poplar

The influence of scavengers on VOC emissions in particleboards made from pine and poplar

Synthesis and Characterization of Sucrose-Melamine-Formaldehyde Adhesives

Impact of thermal treatment on bonding performance of UF/PVAc formulations

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