Effects of Chip Type on the Properties of Chip–Sawdust Boards Glued with Polymeric Diphenyl Methane Diisocyanate

Mirski, Radosław; Derkowski, Adam; Dziurka, Dorota; Wieruszewski, Marek; Dukarska, Dorota

doi:10.3390/ma13061329

Cited by 13 publications

(10 citation statements)

References 12 publications

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“…The course of foaming of the modified PUR foams was characterized on the basis of the times of the successive stages of this process and the maximum foaming temperature. This paper is a continuation of the previous research conducted by the authors concerning the possibility of using by-products from wood processing in order to manufacture materials with improved properties, which are used, e.g., in construction and in the production of interior design elements [30][31][32].…”

Section: Synthesis Of Pur Composite Foamsmentioning

confidence: 86%

“…This paper is a continuation of the previous research conducted by the authors concerning the possibility of using by-products from wood processing in order to manufacture materials with improved properties, which are used, e.g., in construction and in the production of interior design elements [30][31][32].…”

Section: Introductionmentioning

confidence: 86%

“…This is due to the necessity of sustainable management of this type of waste, whose resources increase with the development of the wood industry and the demand for wood-based products. This is evidenced, among others, by current technological trends in the production of wood-based materials and numerous studies indicating the possibility of producing full-value products from recycled wood or directly from primary wood processing [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Waste Wood Particles from Primary Wood Processing as a Filler of Insulation PUR Foams

et al. 2021

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A significant part of the work carried out so far in the field of production of biocomposite polyurethane foams (PUR) with the use of various types of lignocellulosic fillers mainly concerns rigid PUR foams with a closed-cell structure. In this work, the possibility of using waste wood particles (WP) from primary wood processing as a filler for PUR foams with open-cell structure was investigated. For this purpose, a wood particle fraction of 0.315–1.25 mm was added to the foam in concentrations of 0, 5, 10, 15 and 20%. The foaming course of the modified PUR foams (PUR-WP) was characterized on the basis of the duration of the process’ successive stages at the maximum foaming temperature. In order to explain the observed phenomena, a cellular structure was characterized using microscopic analysis such as SEM and light microscope. Computed tomography was also applied to determine the distribution of wood particles in PUR-WP materials. It was observed that the addition of WP to the open-cell PUR foam influences the kinetics of the foaming process of the PUR-WP composition and their morphology, density, compressive strength and thermal properties. The performed tests showed that the addition of WP at an the amount of 10% leads to the increase in the PUR foam’s compressive strength by 30% (parallel to foam’s growth direction) and reduce the thermal conductivity coefficient by 10%.

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Section: Synthesis Of Pur Composite Foamsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

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Waste Wood Particles from Primary Wood Processing as a Filler of Insulation PUR Foams

et al. 2021

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“…The experimental fillers made it possible to obtain glulams with high bonding strength and low delamination. Polymeric diphenylmethane diisocynate (pMDI) adhesives have been steadily gaining popularity in wood bonding due to their moisture tolerance and fast cure [24,25]. Polymeric diphenylmethane diisocynate bonds filled with western red cedar bark showed a comparable dry shear strength and improved wet shear strength compared with nonmodified pMDI.…”

Section: Introductionmentioning

confidence: 99%

The Application of Oak Bark Powder as a Filler for Melamine-Urea-Formaldehyde Adhesive in Plywood Manufacturing

Mirski

Kawalerczyk

Dziurka

et al. 2020

Forests

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The woodworking industry generates a great amount of bark which has not yet found a wider industrial application. None of the previously conducted research has considered oak bark application (which is one of the most often processed wood species in Poland) as a filler for wood adhesives. Moreover, no studies have determined the properties of bark containing melamine-urea-formaldehyde resin (MUF), which increasingly replaces pure urea-formaldehyde adhesives. Thus, the aim of the study was to determine the possibility of grinded oak bark application as a filler for MUF adhesive in plywood manufacturing. The chemical composition of oak bark was evaluated. Properties of liquid resins, such as viscosity, gel time, pH, and solid content, were determined. Chemical interaction between the filler and resin was assessed with using Fourier-transform infrared (FTIR) spectroscopy. Plywood panels manufactured using MUF adhesive filled with different bark concentrations (10%, 15%, 20%, 25%) were tested in terms of such properties as formaldehyde release and bonding quality. Studies have shown an improvement in liquid resin properties. The course of FTIR spectra did not explain the chemical interaction between the polymer and the filler. The addition of oak bark at a concentration of 15% made it possible to produce plywood panels characterized by reduced formaldehyde release and improved bonding quality.

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“…However, little research has been performed on the application of sawdust in the production of building materials [11]. Sawdust-based insulation materials [12], particleboard [13][14][15][16][17][18], cement concrete bricks [19,20], fired clay bricks [21][22][23][24][25][26] and unfired bricks [27][28][29][30][31][32][33][34][35] are some of the developed building materials. Ouattara et al [30] showed that with the incorporation of sawdust (0-25%), the dry density of compressed clay bricks decreased, while the strength increased, for a 15-20% sawdust content.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sawdust Particle Sizes on the Physico-Mechanical Properties of Unfired Clay Blocks

Jannat

Al-Mufti

Hussien

et al. 2021

Designs

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Sawdust, which is a waste/by-product of the wood/timber industry, can be utilised as a valuable raw material in building material production due to its abundance and low cost. However, the application of sawdust in the manufacture of unfired clay blocks has received little investigation. Furthermore, the impact of different sawdust particle sizes on the properties of unfired clay blocks has not been studied. Therefore, this study screened sawdust at three different particle sizes: SP-a (212 μm < x < 300 μm), SP-b (425 μm < x < 600 μm) and SP-c (1.18 mm < x < 2.00 mm), to examine their effects on the physical and mechanical properties of unfired clay blocks. The density, linear shrinkage, capillary water absorption and flexural and compressive strengths were among the tests performed. Different sawdust percentages, i.e., 2.5%, 5%, 7.5% and 10% of the total weight of the clay, were considered. The tests results show that when sawdust was added to the mixture, the density of the samples reduced for all particle sizes. However, the linear shrinkage increased in SP-a samples but decreased in the other two particle size samples as the sawdust percentage increased from 2.5% to 10%. On the other hand, the capillary water absorption coefficient increased while the strength decreased with increasing sawdust content for all three groups. The highest compressive strength (CS) and flexural strength (FS) were achieved at 2.5% of sawdust content. Furthermore, it was observed that SP-b (CS—4.74 MPa, FS—2.00 MPa) samples showed the highest strength followed by SP-a (CS—4.09 MPa, FS—1.69 MPa) and SP-c (CS—3.90 MPa, FS—1.63 MPa) samples. Consequently, good-quality unfired clay blocks can be manufactured using sawdust up to 2.5% with particle sizes ranging between 600 and 425 μm.

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Effects of Chip Type on the Properties of Chip–Sawdust Boards Glued with Polymeric Diphenyl Methane Diisocyanate

Cited by 13 publications

References 12 publications

Waste Wood Particles from Primary Wood Processing as a Filler of Insulation PUR Foams

Waste Wood Particles from Primary Wood Processing as a Filler of Insulation PUR Foams

The Application of Oak Bark Powder as a Filler for Melamine-Urea-Formaldehyde Adhesive in Plywood Manufacturing

Influence of Sawdust Particle Sizes on the Physico-Mechanical Properties of Unfired Clay Blocks

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