scholarly journals Preparation and performance of modified montmorillonite-reinforced wood-based foamed composites

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 3566-3584
Author(s):  
Qingde Li ◽  
Yingyi Liang ◽  
Feng Chen ◽  
Tonghui Sang
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Flexural Modulus ◽  
Wood Fiber ◽  
Physical And Mechanical Properties ◽  
Thickness Swelling ◽  
Compression Process ◽  
Hygroscopic Properties ◽  
Bonding Effect ◽  
And Performance

Wood fiber was modified by impulse-cyclone drying treatment with poplar and montmorillonite as reinforcing materials; mMMT/polypropylene/wood fiber foaming composite was prepared by the hot compression process. The effects of modification, temperature, and content of montmorillonite on physical and mechanical properties of the composite were analyzed. Mechanical properties, porosity, shrinkage, water absorption, and thickness swelling tests showed that when mMMT reinforcement was 5 wt%, the best performance was achieved. The scanning electron microscopy observations showed that bubble holes were distributed widely and evenly, and mMMT appeared in the cell gap and was encapsulated by polypropylene, which maximized the bonding effect. Flexural strength was 27.5 MPa, flexural modulus was 2110 MPa, tensile strength was 20.0 MPa, and impact strength was 6.30 KJ/m2. When absolute volume of dense solid reached 70.8 cm3, porosity was 21.4% and shrinkage was 1.17%, which indicated that the water absorption increased most remarkably under that test condition. When equilibrium water absorption reached 9.28%, the thickness swelling decreased by 25%. The results showed that mMMT effectively optimized mechanical properties of wood-based foamed composites and improved hygroscopic properties.

scholarly journals AVALIAÇÃO DAS PROPRIEDADES FÍSICAS E MECÂNICAS DE PAINÉIS DE FIBRAS DE MÉDIA DENSIDADE (MDF) PRODUZIDOS PELAS INDÚSTRIAS BRASILEIRAS

FLORESTA ◽  
2010 ◽  
Vol 40 (2) ◽  
Author(s):  
Luciane Paes Torquato ◽  
Setsuo Iwakiri ◽  
Ghislaine Miranda Bonduelle ◽  
Carlos Eduardo Camargo de Albuquerque ◽  
Jorge Luís Monteiro de Matos
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Internal Bond ◽  
Medium Density Fiberboard ◽  
Wood Fiber ◽  
Physical And Mechanical Properties ◽  
Thickness Swelling ◽  
European Standard ◽  
Pine Wood ◽  
Minimum Requirements

Este trabalho foi desenvolvido com o objetivo de avaliar a qualidade de painéis MDF produzidos pelas indústrias brasileiras com base nos resultados de propriedades físicas e mecânicas dos painéis tipo “standard” com 15 mm de espessura. Foram selecionadas quatro empresas produtoras de painéis MDF, que foram identificadas pelas letras A, B, C e D. Para as avaliações das propriedades dos painéis, foram, coletadas para todas as empresas, três painéis-amostras produzidos com madeira de pinus, além de painéis de eucalipto para a empresa D. As propriedades avaliadas foram: teor de umidade, densidade, perfil de densidade, absorção de água e inchamento em espessura 2 e 24 horas, ligação interna e flexão estática. Os ensaios foram realizados de acordo com a norma europeia EM, e os resultados foram comparados com os requisitos da norma EN 622-5:2006. Os painéis produzidos com madeira de eucalipto apresentaram valores médios inferiores de ligação interna e média de absorção de água maior que os obtidos com painéis de pinus. Os valores médios de inchamento em espessura 24 horas, MOE e MOR em flexão estática paralela dos painéis MDF comerciais avaliados nesta pesquisa atendem aos requisitos mínimos da norma EN 622-5:2006. Os valores médios de ligação interna foram inferiores em relação aos requisitos dessa norma. Palavras-chave: Painéis MDF; pinus; fibras de madeira.   Abstract Evaluation of physical and mechanical properties of medium density fiberboard (MDF) manufactured from brazilian industries. This research was developed to evaluate the quality of MDF manufactured by brazilian industries based on the results of physical and mechanical properties of the standard boards with 15 mm thickness. Four factories were selected and identified as A, B, C, and D. For the evaluation of the board properties, they were collected from the all factories three samples produced by pine wood, besides of sample produced by eucalipto wood to the factory D. The following board properties were evaluated: moisture content, density, density profile, water absorption and thickness swelling 2 and 24 hours, internal bond and static bending. The tests were carried out according to European Standard EN and the results were compared with the requirements of European Standard EN 622-5:2006. The boards manufactured from eucalipto wood showed lower average values of internal bond and higher water absorption in comparison to boards manufactured from pine wood. The average values of thickness swelling after 24 hours water soaking, MOE and MOR parallel static bending of the commercial MDF evaluated in this study attends to minimum requirements of EN 622-5:2006. The average values of internal bond were lower than in relation to the EN standard.Keywords: MDF; pine; wood fiber.

An attempt to use „Tetra Pak” waste material in particleboard technology

2021 ◽  
Vol 114 ◽  
pp. 70-75
Author(s):  
Radosław Auriga ◽  
Piotr Borysiuk ◽  
Alicja Auriga
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Bending Strength ◽  
Physical And Mechanical Properties ◽  
Core Layer ◽  
Waste Material ◽  
Thickness Swelling ◽  
The Core ◽  
Tetra Pak ◽  
The Impact

An attempt to use „Tetra Pak” waste material in particleboard technology. The study investigates the effect of addition Tetra Pak waste material in the core layer on physical and mechanical properties of chipboard. Three-layer chipboards with a thickness of 16 mm and a density of 650 kg / m3 were manufactured. The share of Tetra Pak waste material in the boards was varied: 0%, 5%, 10% and 25%. The density profile was measured to determine the impact of Tetra Pak share on the density distribution. In addition, the manufactured boards were tested for strength (MOR, MOE, IB), thickness swelling and water absorption after immersion in water for 2 and 24 hours. The tests revealed that Tetra Pak share does not affect significantly the value of static bending strength and modulus of elasticity of the chipboard, but it significantly decreases IB. Also, it has been found that Tetra Pak insignificantly decreases the value of swelling and water absorption of the chipboards.

scholarly journals INFLUENCE OF THERMAL MODIFICATION ON THE PHYSICAL AND MECHANICAL PROPERTIES OF Eucalyptus badjensis MIXED PARTICLEBOARD / OSB PANELS

FLORESTA ◽  
2021 ◽  
Vol 51 (2) ◽  
pp. 419
Author(s):  
Giuliano Ferreira Pereira ◽  
Setsuo Iwakiri ◽  
Rosilani Trianoski ◽  
Polliana D'angelo Rios ◽  
Renan Zunta Raia
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Phenol Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Dry Mass ◽  
Thermal Modification ◽  
Modulus Of Rupture ◽  
Thickness Swelling ◽  
Swelling Properties ◽  
Different Temperatures

The objective of this research was to evaluate the effects of thermal modifications, at different temperatures and exposure times, on the technological properties of mixed particleboard / OSB panels made out of Eucalyptus badjensis. Using the wood of Eucalyptus badjensis, Particleboard, OSB and mixed Particleboard/OSB panels (control and thermally modified) were manufactured. The mixed panels’ thermal modification was carried out under three temperatures (180ºC, 200ºC and 220ºC) and two exposure times (10 minutes and 12 minutes). For the panels’ manufacturing, 6% of phenol-formaldehyde adhesive and 1% of paraffin were employed, which was calculated based on the particles’ dry mass. The water absorption and thickness swelling properties were evaluated after 2 and 24 hours of immersion, in addition to the panels’ modulus of elasticity, modulus of rupture and internal bond. Based on the results, we were able to conclude that the thermal modification affected most of the physical properties positively. From the different exposure times studied, the most effective one was the period of 12 minutes, especially for water absorption after 2 hours, which caused a reduction of 11.27%. In turn, the most effective temperature was of 220ºC, highlighting the thickness swelling after 24 hours, which caused a swelling decrease of 23.76% in comparison with the control panels. Regarding the mechanical properties, the thermal modification, in terms of the studied exposure times and temperatures, did not affect the results of the mixed particleboard /OSB panels. 

scholarly journals Effects of Resin Content on the Characteristics of Bamboo Oriented Strand Board Prepared from Strands of Betung, Ampel, and Their Mixtures

2021 ◽  
Vol 9 (3) ◽  
pp. 454-465
Author(s):  
Tengku Muhammad Renzy Hariz ◽  
Indra Agus Santosa ◽  
Muhammad Iqbal Maulana ◽  
Marwanto ◽  
Denni Prasetia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Dimensional Stability ◽  
Oriented Strand Board ◽  
Physical And Mechanical Properties ◽  
Resin Content ◽  
Thickness Swelling ◽  
Higher Dimensional ◽  
Bambusa Vulgaris ◽  
Dendrocalamus Asper

The objectives of this research were to evaluate bamboo-oriented strand board (BOSB) characteristics made from betung (Dendrocalamus asper), ampel (Bambusa vulgaris), and their mixtures at two different contents (3% and 5%) of methylene diphenyl di-isocyanate (MDI) adhesives. The strands were steam-treated at 126°C for 1 h under the pressure of 0.14 MPa. Three-layered BOSBs with a target density of 0.7 g/cm3 were made with the size of 30 cm x 30 cm x 0.9 cm and a shelling ratio of 1:2:1 (face:core:back layers). The physical and mechanical properties of BOSB were evaluated following JIS A 5908 (2003) standard, and the results were compared with the CSA 0437.0 Grade O-1 standard. The results show that BOSB from the mixtures of betung and ampel bamboo strands has higher dimensional stability as shown by the decrease in water absorption and thickness swelling and higher mechanical properties than single BOSB. All BOSBs with 5% resin content have higher dimensional stability, MOE, and MOR than BOSB with 3% resin content. The physical and mechanical properties of all BOSB manufactured met the CSA 0437.0 Grade O-1 standard. This study proved that BOSBs from the mixture of betung and ampel strands have the potential to be developed due to having better physical and mechanical qualities than a single BOSB. Keywords: ampel (Bambusa vulgaris), bamboo oriented strand board, betung (Dendrocalamus asper), resin content, strand mixtures

Evaluation of Incorporation of Special Vitreous Residues in Mass for Porcelain Stoneware: Physical and Mechanical Properties

2015 ◽  
Vol 820 ◽  
pp. 600-604
Author(s):  
A.M.B Araújo ◽  
V.S. Porto ◽  
C.R.S. Morais ◽  
M.S.L. Cavalcanti
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Flexural Modulus ◽  
Physical And Mechanical Properties ◽  
Linear Shrinkage ◽  
Mechanical Tests ◽  
Fluorescent Lamps

This study aimed to technological alternatives for reuse of vitreous residues from fluorescent lamps, which cause damage to the environment. It was prepared mass to white ceramic with and without lamps residues replacing partially feldspar in proportions of 5% and 10%. Samples were molded and fired at 1000 ° C, 1100 ° C, 1150 ° C, 1200 ° C and 1250 ° C. Physical and mechanical tests were: water absorption, linear shrinkage and rupture by flexural modulus. Samples with 10% of residues reached stability at temperature less than 1250 ° C in all determined properties, confirming the feasibility of these residues in ceramic masses. To optimize the study, it was prepared other samples in proportions of 15% and 20% of waste, at the same level of burning and testing. Results obtained ratified the possibility of using these residues as a flux in ceramic slurries.

scholarly journals Sifat Fisis dan Mekanis Papan Semen dari Serat Tandan Kosong Kelapa Sawit (The Physical and Mechanical Properties of Cement Board Made from Oil Palm Empty Fruit Bunches Fibers)

2016 ◽  
Vol 8 (2) ◽  
pp. 43-52 ◽  
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Oil Palm ◽  
Modulus Of Elasticity ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Thickness Swelling ◽  
Empty Fruit Bunches ◽  
Screw Withdrawal ◽  
Cement Board

Oil palm empty fruit bunches (OPEFB) fiber were industrial waste that has not been widely used by the community, only stacked and cause odors that interfere with the surrounding environment. This research studied the utilization of OPEFB fiber for cement board products using cement as resin and CaCl2 as accelerator. Laboratory scale cement board made from OPEFB fiber were mixed with cement, and CaCl2. The composition of fiber and cement were 1:1, 1:1.5, 1:2, and CaCl2 variations were 0%, 1% and 3%. A mixture of fibers, cement and CaCl2 was compressed at the pressure of 4 ton for 24 hours. The cement boards were tested for physical and mechanical properties according to JIS A 5417-1992, and the results were compared to the requirements of the cement board JIS A 5417-1992. Cement board made from fiber and cement composition 1:1.5 and CaCl2 content 3% produced moisture content, thickness swelling, water absorption, density, modulus of rupture/MOR, modulus of elasticity/MOE and screw withdrawal strength that met the requirement of JIS A 5417-1992. The composition of fiber and cement and the variations of CaCl2 content produced significant effect on water content, water absorption, thickness swelling, modulus of rupture/MOR, modulus of elasticity/MOE and screw withdrawal strength on cement boards.Keywords : oil palm empty fruit bunches fiber, cement boards, physical and mechanical properties

scholarly journals Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4875 ◽  
Author(s):  
Pavlo Bekhta ◽  
Gregory Noshchenko ◽  
Roman Réh ◽  
Lubos Kristak ◽  
Ján Sedliačik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Diphenylmethane Diisocyanate ◽  
Thickness Swelling ◽  
Sodium Lignosulfonate ◽  
Formaldehyde Content ◽  
Uf Resin ◽  
Adhesive Compositions

The purpose of this study was to evaluate the feasibility of using magnesium and sodium lignosulfonates (LS) in the production of particleboards, used pure and in mixtures with urea-formaldehyde (UF) resin. Polymeric 4,4′-diphenylmethane diisocyanate (pMDI) was used as a crosslinker. In order to evaluate the effect of gradual replacement of UF by magnesium lignosulfonate (MgLS) or sodium lignosulfonate (NaLS) on the physical and mechanical properties, boards were manufactured in the laboratory with LS content varying from 0% to 100%. The effect of LS on the pH of lignosulfonate-urea-formaldehyde (LS-UF) adhesive compositions was also investigated. It was found that LS can be effectively used to adjust the pH of uncured and cured LS-UF formulations. Particleboards bonded with LS-UF adhesive formulations, comprising up to 30% LS, exhibited similar properties when compared to boards bonded with UF adhesive. The replacement of UF by both LS types substantially deteriorated the water absorption and thickness swelling of boards. In general, NaLS-UF-bonded boards had a lower formaldehyde content (FC) than MgLS-UF and UF-bonded boards as control. It was observed that in the process of manufacturing boards using LS adhesives, increasing the proportion of pMDI in the adhesive composition can significantly improve the mechanical properties of the boards. Overall, the boards fabricated using pure UF adhesives exhibited much better mechanical properties than boards bonded with LS adhesives. Markedly, the boards based on LS adhesives were characterised by a much lower FC than the UF-bonded boards. In the LS-bonded boards, the FC is lower by 91.1% and 56.9%, respectively, compared to the UF-bonded boards. The boards bonded with LS and pMDI had a close-to-zero FC and reached the super E0 emission class (≤1.5 mg/100 g) that allows for defining the laboratory-manufactured particleboards as eco-friendly composites.

scholarly journals The classical mechanics engineered of Bambusa vulgaris and Schizostachyum brachycladum

2021 ◽  
Vol 6 (2) ◽  
pp. 57-61
Author(s):  
Mohamad Saiful Sulaiman ◽  
Sitti Fatimah Mhd. Ramle ◽  
Rokiah Hashim ◽  
Othman Sulaiman ◽  
Mohd Hazim Mohamad Amini ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Water Absorption ◽  
Classical Mechanics ◽  
Basic Density ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Flexural Test ◽  
Thickness Swelling ◽  
Bambusa Vulgaris

Physical and mechanical properties of Bambusa vulgaris and Schizostachyum brachycladum wereinvestigated. The sample were classified into two different ages which are young and mature foreach culm of bamboo. The aim of this study to investigate the physical properties such as density,basic density, moisture content, water absorption and thickness swelling. Other than that, themechanical properties also help to determine their flexural test for modulus of rupture (MOR) andmodulus of elasticity (MOE). The method used to analyse physical and mechanical properties werefollowing the ISO standard. From this study, young Bambusa vulgaris has indicated the highercontent of moisture content, water absorption and thickness swelling with 67.66%, 2.69% and34.03%, respectively while mature Schizostachyum brachycladum has shown the higher value inbasic density, density, and flexural test for MOR and MOE with 876.33 kg/m3, 1084.49 kg/m3, 317.01 N/mm2 and 122986.18 N/mm2, respectively.

scholarly journals SIFAT FISIK DAN MEKANIK KOMPOSIT KAYU SEMEN-SERBUK GERGAJI

PERENNIAL ◽  
2006 ◽  
Vol 2 (1) ◽  
pp. 38 ◽  
Author(s):  
. Bakri ◽  
Endra Gunawan ◽  
Djamal Sanusi
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
Water Absorption ◽  
Key Words ◽  
Water Content ◽  
Physical And Mechanical Properties ◽  
Wood Composite ◽  
Thickness Swelling ◽  
Iso Standards ◽  
Saw Dust

This research aims to find out the effect of cement-saw dust ratio levels on the physical and mechanical properties of produced composites. The physical properties (density, water content, water absorption after the immersion of one hour and 24 hours, and thickness swelling after the immersion of one hour and 24 hours) and mechanical properties (MOE and MOR) were observed according to ISO standards. The results showed that the use of the cement to sawdust ratio of 3 : 1 in producing wood composite with the target density of 1200 kg/m3 resulted in the lowest water absorption and the highest MOE and MOR. The swelling value and MOR of the produced boards were not acceptable, but their water content, water absorption, and MOE parameters were acceptable according to ISO 8335 1997. Key Words : Physical and mechanical properties, cement wood composite, sawdust

Effect of Density on Physical and Mechanical Properties of Reconstituted Small-Sized Bamboo Fibrous Sheet Composite

2010 ◽  
Vol 150-151 ◽  
pp. 634-639 ◽  
Author(s):  
Rong Xian Zhu ◽  
Wen Ji Yu
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Thickness Swelling ◽  
Cold Pressing ◽  
Shearing Strength

The effect of density on physical and mechanical properties of phenolic-impregnated cold-pressing reconstituted small-sized bamboo fibrous sheet composite was evaluated. The results indicated that with the density increased from 0.85g/cm3 to 1.20 g/cm3: water absorption decreased, thickness swelling increased first and then decreased; the value of modulus of rupture(MOR) increased from 120MPa to 230MPa, R2 was 0.885; the value of modulus elasticity(MOE) increased from 1.8×104MPa to 2.8×104MPa, R2 was 0.978; the shearing strength (perpendicular loading) increased from 6.5MPa to 18MPa, R2 was 0.978;the shearing strength( parallel loading) increased from 6.3MPa to 26MPa, R2 was 0.973;the compression parallel to grain values increased from 80MPa to 120MPa.

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