Hardness and Roughness of Overlaid Wood Composites Exposed to a High-Humidity Environment

Salca, Emilia-Adela; Hızıroǧlu, Salim

doi:10.3390/coatings9110711

Cited by 9 publications

(3 citation statements)

References 22 publications

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“…Various studies were carried out to analyze formaldehyde absorption by bark in the cases of particleboard (PB) [14][15][16], plywood [17][18][19], medium-density fiberboard (MDF) [20], and insulation panels using bark and bark extractives [21]. In this study, the bark of the European larch (Larix decidua Mill.)…”

Section: Introductionmentioning

confidence: 99%

Analysis of Larch-Bark Capacity for Formaldehyde Removal in Wood Adhesives

Tudor

Barbu

Petutschnigg

et al. 2020

IJERPH

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Ecofriendly wood-based materials are required by consumers at present. Decorative panels are part of a large group of wood-composite materials, and their environmental properties must not be neglected. More environmentally friendly decorative panels can be achieved by various methods. This paper describes a method of production from larch bark. Tree bark, as a byproduct of the wood industry, is one of the research topics that have gained interest in the last decade, especially for its applications in biobased lignocomposites, with regard to the shrinkage of wood resources. In the present work, the formaldehyde content of decorative boards based on larch bark (0.6 g/cm3) was analyzed when bonded with five different types of adhesive systems: urea-formaldehyde, polyvinyl acetate, the mixture of 70% urea-formaldehyde + 30% polyvinyl acetate, polyurethane, and tannin-based adhesive. A self-agglomerated board was also analyzed. The formaldehyde content of the larch-bark samples was determined with the perforator method (EN 120:2011), and findings showed that all tested samples reached the E1 classification (≤8 mg/100 oven dry). Moreover, 75% of the values of the corrected formaldehyde content were included in the super-E0 class (≤1.5 mg/100 oven dry). In the case of boards bonded with tannin-based adhesive, this natural polymer acted as a formaldehyde scavenger.

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Section: Introductionmentioning

confidence: 99%

Analysis of Larch-Bark Capacity for Formaldehyde Removal in Wood Adhesives

Tudor

Barbu

Petutschnigg

et al. 2020

IJERPH

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“…It is a patterned paper in which paper is impregnated with thermosetting resin (melamine, urea, and acrylic), and then the surface is painted [40]. This material was developed to reduce the cost of LPM.…”

Section: Finishing Foil (F/f)mentioning

confidence: 99%

Investigating the Emission of Hazardous Chemical Substances from Mashrabiya Used for Indoor Air Quality in Hot Desert Climate

Jung

Qassimi

2022

Sustainability

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Dubai has the reputation of a continuously growing city, with skyscrapers and mega residential projects. Many new residential projects with poor choices of material and ventilation have led to a faster rise in sick building syndrome (SBS) in Dubai than in any other country, and the IAQ (indoor air quality) has become more critical. Volatile organic compounds (VOCs) and formaldehyde (HCHO) affect the health of residents, producing the phenomenon known as SBS (sick building syndrome). It has been reported that wood materials used for furniture and wooden windows and doors are a significant source of indoor air pollution in new houses. This paper aims to identify the factor elements emitting harmful chemical substances, such as VOCs and HCHO, from wooden mashrabiya (traditional Arabic window) by examining the characteristics of the raw and surface materials through test pieces. As a methodology, a small chamber system was used to test the amount of hazardous chemicals generated for each test piece. For Total volatile organic compounds (TVOC) and HCHO, the blank concentration before the injection and the generation after seven days were measured. The results showed that to reduce TVOC, it is necessary to secure six months or more as a retention period for raw materials and surface materials. The longer the retention period, the smaller the TVOC emission amount. In the case of mashrabiya, an HCHO low-emitting adhesive and maintenance for one month or more are essential influencing factors. It was proven that using raw materials with a three-month or more retention period and surface materials with a one-month or more retention period is safe for indoor mashrabiya. This study is the first study in the Middle East to identify factors and characteristics that affect the emission of hazardous chemicals from wood composite materials, such as wood mashrabiya, that affect indoor air quality in residential projects in Dubai. It analyzes the correlation between emission levels and the retention period of raw and surface materials, in order to provide a new standard for indoor air pollutants.

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“…With the increase in application of wood-plastic composites (WPCs) and shortage of forest resources, the choice of composite filler material has gradually shifted to crop straws, various forest residues, and waste residue after extracting nutrients to prepare biomass fibers 1,2 since they have advantages of low cost, low technical barriers, and sustainable development. 3 Natural fibers reinforced with matrix for composite production have already been used for many applications, such as packaging, building, aerospace, and automobile industries where high load bearing capacities are not required.…”

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confidence: 99%

Analysis of the properties of alkaline-treated rape straw and stalk polyvinyl chloride composites

Bichi

Zhang

Yang

et al. 2022

Textile Research Journal

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Wood-plastic composites are being widely used more and more, and the bonding strength between fillers and matrix is an important factor affecting the properties of wood-plastic composites. In this study, rapeseed straw and rapeseed stalk were pretreated with sodium hydroxide and then filled with polyvinyl chloride matrix to prepare composites. The chemical composition, thermal stability, microstructure, physical properties, mechanical properties, and abrasive wear resistance of the composites were characterized, and the effects of different concentrations of alkaline treatment on rapeseed straw composite and rapeseed stalk composite were revealed. The results show that alkaline treatment has no significant effect on the chemical composition of the composites but has an obvious effect on other properties. Among them, after 1% alkaline treatment, rapeseed straw composite has the highest hardness, thermal stability, and impact strength, rapeseed stalk composite has the highest impact strength and bending strength. After 3% alkaline treatment, rapeseed straw composite has more wear resistance, rapeseed stalk composite has the highest density, the highest tensile strength, and more wear resistance. The rapeseed straw composite with 5% alkaline treatment has the highest density, and the rapeseed stalk composite with 7% alkaline treatment has the highest thermal stability. The hardness of rapeseed stalk composite and the tensile strength and bending strength of rapeseed straw composite decreased with the increase of alkaline treatment concentration.

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Hardness and Roughness of Overlaid Wood Composites Exposed to a High-Humidity Environment

Cited by 9 publications

References 22 publications

Analysis of Larch-Bark Capacity for Formaldehyde Removal in Wood Adhesives

Analysis of Larch-Bark Capacity for Formaldehyde Removal in Wood Adhesives

Investigating the Emission of Hazardous Chemical Substances from Mashrabiya Used for Indoor Air Quality in Hot Desert Climate

Analysis of the properties of alkaline-treated rape straw and stalk polyvinyl chloride composites

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