Physical and mechanical properties of thin high density fiberboard bonded with 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU)

Mamiński, M.; Trzepałka, Andrzej; Auriga, Radosław; H’ng, Paik San; Chin, Kit Ling

doi:10.1080/00218464.2018.1500280

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…The results revealed that the presence of pre-treated straw in bio-based composites induces a negligible reduction in density compared to that of bio-based composites with untreated straw. The term high-density fibreboard composites refers to the composites with the density higher than 0.8 g/cm 3 (Guo et al, 2020;Mamiński et al, 2018). In this study, the density values of all the bio-based composites have been varied between 0.92 g/cm 3 and Fig.…”

Section: Tensile Properties Improvements Of Wheat Straw Bio-based Compositesmentioning

confidence: 99%

Wheat straw pre-treatments using eco-friendly strategies for enhancing the tensile properties of bio-based polylactic acid composites

Chougan

Ghaffar

Al‐Kheetan

et al. 2020

Industrial Crops and Products

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Individual and hybrid pre-treatments, including hot water, steam and microwave were used on wheat straw to mitigate the surface quality deficiencies for an intimate interfacial bond between substrate and Polylactic Acid matrix. Microstructural analysis showed the expansion of cells due to the pre-treatments which in turn promotes mechanical entanglement between wheat straw and PLA, thus, improving the tensile properties of bio-based composites. The tensile strength, elongation at break, elastic modulus, and toughness increased by 166 %, 18 %, 68 %, and 285 %, respectively, for hot water followed by steam pre-treated wheat straw bio-based composites compared to untreated.

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Section: Tensile Properties Improvements Of Wheat Straw Bio-based Compositesmentioning

confidence: 99%

Wheat straw pre-treatments using eco-friendly strategies for enhancing the tensile properties of bio-based polylactic acid composites

Chougan

Ghaffar

Al‐Kheetan

et al. 2020

Industrial Crops and Products

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“…2014'de Liu [41], atkı ve çözgü yönünde ölçülen buruşmazlık açısı değerlerini incelemiştir. 2018'de Maminski [42], çapraz bağlayıcı DMDHEU türevleri kullanarak işlemlerin yüzeylerin fiziksel ve mekanik özelliklerini incelemiştir. 2019'da Liu [43], çapraz bağlayıcı olarak BTCA kullanarak rejenere selüloz kumaşın kuru ve yaş buruşmazlık açıları ile yıkama dayanımı etkilerini incelemiştir.…”

Section: şEkil 1 Selüloz Moleküler Yapısı (Cellulose Molecular Strucunclassified

Farklı çapraz bağlayıcılar uygulanmış viskon yüzeyin buruşmazlık ve performans özellikleri

Orhan¹

2021

Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi

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 Application of different cross-linkers on viscose surface  Investigation of the effects on formaldehyde amount, color, physical properties, softness and wrinkle recovery  Improvements values of free formaldehyde, tensile and tear strength and higher wrinkle recovery Cellulosic-based surfaces, such as viscose and linen, tend quickly to wrinkle, and this is an undesirable property during uses. In this study, it is aimed to investigate their effects on formaldehyde amount, color, tear and tear resistance, modulus of elasticity, softness, and wrinkle recovery angle of surface after applying three different cross-linking chemicals. It has been observed that cross-linking agents had bound to viscose surface, and cross-links were formed between adjacent fibers. Although free formaldehyde values were positively below 75 ppm in all applications, it was seen that color difference and yellowing continued to be a problem. The improvements in breaking and tearing strength were obtained compared to the untreated surface. While lower bending rigidity values were measured for all applications, surfaces had a softer handle after treatments. The higher wrinkle angle values were achieved on the surfaces with an increase in concentration. It was determined that imidazoline gave the best wrinkle angle values among cross-linkers. Figure A. SEM micrographs and FTIR spectrum of cross-linked viscose surface Purpose: The aim of the study is to investigate the effect of different cross-linking chemicals on formaldehyde amount, color, tear and tear resistance, modulus of elasticity, softness, and wrinkle angle of viscose surface. Theory and Methods: In this study, it was chosen viscose fabric and then it was treated by three different cross-linking chemicals, as 80, 115 and 150 g/L of concentration. It was investigated their effects on surface properties after treatments. Results: SEM and FTIR analysis confirmed that the new bonds formed on viscose surfaces after treatments. Conclusion: The use of cross-linking chemicals caused a significant contribution to the physical and wrinkle properties of the viscose surface. The best wrinkle property has been given imidazoline chemical. Considering the fabric properties, 115 g/L application is recommended for all cross-linkers to improve the wrinkle property.

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“…Several studies have been carried out using various adhesive systems [7][8][9], post treatments [10], heat treated fibers [11], alternative fibers [12] and recycled adhesives [13] to improve strength and water resistance of MDF panels. In addition, chemical modification was also used to improve the material properties, such as moisture-related properties, durability and weathering resistance [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions

Ahmed

Αδαμόπουλος²,

et al. 2020

Applied Sciences

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Change of relative humidity (RH) in surrounding environment can greatly affect the physical and mechanical properties of wood-based panels. Commercially produced acetylated medium density fiberboard (MDF), Medite Tricoya®, was used in this study to predict strength and stiffness under varying humid conditions by separating samples in parallel (//) and perpendicular (⊥) to the sanding directions. Thickness swelling, static moduli of elasticity (MOEstat) and rupture (MORstat), and internal bond (IB) strength were measured at three different humid conditions, i.e., dry (35% RH), standard (65% RH) and wet (85% RH). Internal bond (IB) strength was also measured after accelerated aging test. A resonance method was used to determine dynamic modulus of elasticity (MOEdyn) at the aforementioned humid conditions. Linear regression and finite element (FE) analyses were used to predict the MDF’s static bending behavior. Results showed that dimensional stability, MOEstat, MORstat and IB strength decreased significantly with an increase in RH. No reduction of IB strength was observed after 426 h of accelerated aging test. A multiple regression model was established using MOEdyn and RH values to predict MOEstat and MORstat. In both directions (// and ⊥), highly significant relationships were observed. The predicted and the measured values of MOEstat and MORstat were satisfactorily related to each other, which indicated that the developed model can be effectively used for evaluating the strength and stiffness of Medite Tricoya® MDF samples at any humid condition. Percent errors of two different simulation techniques (standard and extended FE method) showed highly efficient way of simulating the MDF structures with low fidelity.

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Physical and mechanical properties of thin high density fiberboard bonded with 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU)

Cited by 6 publications

References 34 publications

Wheat straw pre-treatments using eco-friendly strategies for enhancing the tensile properties of bio-based polylactic acid composites

Wheat straw pre-treatments using eco-friendly strategies for enhancing the tensile properties of bio-based polylactic acid composites

Farklı çapraz bağlayıcılar uygulanmış viskon yüzeyin buruşmazlık ve performans özellikleri

Prediction of Mechanical Performance of Acetylated MDF at Different Humid Conditions

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