Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour

Ferreira, Ana M.; Pereira, João; Almeida, Margarida; Ferra, João; Paiva, Nádia; Martins, Jorge; Magalhães, Fernão D.; Carvalho, Luísa

doi:10.3390/polym10101070

Cited by 17 publications

(17 citation statements)

References 37 publications

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“…Starch is a low cost raw material, renewable, biodegradable, and with good binding properties, especially on cellulosic substrates [14]. The usability of different forms of starch as raw material in a variety of applications, ranging from plastic utensils to wood particleboards, has been widely demonstrated [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Biosourced Disposable Trays Made of Brewer’s Spent Grain and Potato Starch

et al. 2019

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Single-use plastic items made of non-biodegradable and fossil-based materials have been identified as a major environmental problem in modern society. Food packaging materials represent an important fraction of these, and replacement with biosourced, sustainable and low-cost alternatives, is a key priority. In the present work, and for the first time, trays suitable for some food packaging applications were produced by the hot-pressing of brewer’s spent grains (BSG, a low added-value byproduct of the beer industry), bound with potato starch. Expanded polystyrene (EPS) trays were used as reference, since this material has been widely used in food packaging trays. The results demonstrated that all trays produced with varying proportions of BSG and potato starch have appropriate flexural strength, with values ranging between 1.51 ± 0.32 MPa, for 80% BSG content, and 2.62 ± 0.46 MPa, for 40% BSG content, which is higher than for EPS, 0.64 ± 0.50 MPa. Regardless of BSG content, flexural strength and modulus decreased significantly after contact with water, due to starch plasticization, attaining values below EPS. Trays produced with 60% BSG, and also with the addition of chitosan and glyoxal presented the highest flexural strength, both before and after contact with water, 3.75 ± 0.52 MPa and 0.44 ± 0.11 MPa, respectively. The latter is reasonably close to the reference value obtained for EPS.

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Section: Introductionmentioning

confidence: 99%

Biosourced Disposable Trays Made of Brewer’s Spent Grain and Potato Starch

et al. 2019

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“…All the particleboards produced were prepared with 200 g dry solids content (starch, chitosan, glycerol, fibers and cardoon). Single layer particleboards were hand formed in square aluminum deformable containers, with dimensions of 220 × 220 × 80 mm 3 . A computer controlled laboratory-scale press, equipped with a linear variable displacement transducer (LVDT), pressure transducer and thermocouples, was used to produce the particleboards.…”

Section: Particleboards Production and Characterizationmentioning

confidence: 99%

“…In general, the adhesives used in the production of particleboards are based in formaldehyde in combination with urea and/or melamine or phenol, due to their good adhesive performance, high reactivity and lower price [2][3][4]. However, the adhesive industry has been searching for alternatives that are more sustainable, eco-friendly and less dependent of fossil resources, while guaranteeing good bonding performance and economic viability [5].…”

Section: Introductionmentioning

confidence: 99%

Low-Density Cardoon (Cynara cardunculus L.) Particleboards Bound with Potato Starch-Based Adhesive

et al. 2020

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In the present work, and for the first time, totally biosourced low-density particleboards were produced using cardoon particles (a no added value by-product from the Portuguese cheese making industry), bound with a potato starch adhesive. Different starch/cardoon ratios (0.6, 0.8, 1 and 1.2) were tested and the effect of different bio-based additives (chitosan, wood fiber and glycerol) on the performance of the adhesive system was evaluated. The best result was obtained for a formulation with a starch/cardoon mass ratio of 0.8, a chitosan/starch mass ratio of 0.05 and a water/starch mass ratio of 1.75. The particleboards produced had a density of 323 kg·m−3, internal bond strength of 0.35 N·mm−2 and thickness swelling of 15.2%. The values of density and internal bond strength meet the standard requirements of general-purpose lightweight boards for use in dry conditions according to CEN/TS 16368 specification. Moreover, the susceptibility of the formulations with best results was established against subterranean termites and one decay fungi.

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“…Currently, biosourced and biodegradable materials assume great industrial importance due to environmental issues, in particular regarding replacement of petroleum-derived raw materials and degradability after disposal [3,4]. Biopolymers like tannins, lignin, and starch have been proposed to replace the synthetic adhesives used in particleboards [5,6,7]. Zhao et al used a binder composed of tannin and sucrose to produce particleboards with a density of 800 kg·m −3 .…”

Section: Introductionmentioning

confidence: 99%

Low Density Wood Particleboards Bonded with Starch Foam—Study of Production Process Conditions

et al. 2019

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It has been shown that wood particleboards bonded with sour cassava starch can display low density combined with good physico-mechanical performance, thanks to starch being able to produce a strong foam that fills the interparticular space. Here we optimize the pressing conditions for the production of these panels. The procedure involved hot-plate pressing in two stages: (1) lowering the top platen to a specified thickness for a duration designated as pressing time, followed by (2) raising the top platen to allow panel expansion for a duration designated as hold time. The parameters studied were the pressing time (10 to 150 s), the hold time (290 to 890 s), and the top platen temperature (80 to 190 °C). The hold time and pressing time showed to be crucial parameters. The best operating conditions corresponded to 600 s of press cycle time, comprising 60 s of pressing time and 540 s of hold time. The top platen temperature used was 190 °C. The particleboards produced had a density of 405 kg·m−3, an internal bond strength of 0.44 N·mm−2, and a thickness swelling of 13.2%. This can be considered as very good performance, taking into account the panels’ low density.

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Biosourced Binder for Wood Particleboards Based on Spent Sulfite Liquor and Wheat Flour

Cited by 17 publications

References 37 publications

Biosourced Disposable Trays Made of Brewer’s Spent Grain and Potato Starch

Biosourced Disposable Trays Made of Brewer’s Spent Grain and Potato Starch

Low-Density Cardoon (Cynara cardunculus L.) Particleboards Bound with Potato Starch-Based Adhesive

Low Density Wood Particleboards Bonded with Starch Foam—Study of Production Process Conditions

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