Effects of Anatomical Characteristics and Wood Density on Surface Roughness and Their Relation to Surface Wettability of Hardwood

Alia-Syahirah, Y.; Paridah, M. T.; Hamdan, Halimaton; Anwar, U. M. K.; Nordahlia, A. S.; Lee, S. H.

doi:10.26525/jtfs2019.31.3.269

Cited by 11 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, batai has the shortest, thinnest fibre, and large vessel diameter (Table 1) which contribute to the lower density. Similar result was also reported by [29] and [30] where density is correlated to the fibre length, fibre wall thickness, and vessel diameter. In terms of shrinkage (Table 2), batai and sesendok have the highest shrinkage for tangential, radial, and longitudinal.…”

Section: Physical and Mechanical Propertiessupporting

confidence: 91%

Anatomical, physical, and mechanical properties of four pioneer species in Malaysia

et al. 2020

View full text Add to dashboard Cite

The purpose of this study is to evaluate the anatomical, physical, and mechanical properties of four pioneer species, i.e., batai (Paraserianthes moluccana), ludai (Sapium baccatum), mahang (Macaranga gigantea), and sesendok (Endospermum malaccense). Correlation of factors influencing density, shrinkage, and mechanical properties were also discussed. Samples were obtained from the Forest Research Institute Malaysia (FRIM) campus. From the result obtained, these four pioneer species characterised by medium-to-large vessel with absent of tyloses and gum deposit, fine ray, thin walled fibre, runkel ratio less than 1.0, low in density, and mechanical properties. Sesendok has significantly higher value in fibre length, fibre diameter, fibre lumen diameter, fibre wall thickness, vessel diameter, density, MOR, MOE, compression parallel to grain, and shear parallel to grain compared to the other three pioneer species which were 2001 µm, 45 µm, 35 µm, 5.1 µm, 300 µm, 514 kg/m 3 , 79.5 N/mm 2 , 9209 N/mm 2 , 38.7 N/mm 2 , and 10.1 N/mm 2 , respectively. Between these four pioneer species, ludai has significantly higher in runkel ratio which was 0.57, whereas mahang shows significantly higher in slenderness ratio and number of vessels/mm 2 which were 50.2 and 5 vessel/mm 2 , respectively. On the other hand, batai has higher tangential, radial and longitudinal shrinkage compared to ludai, mahang, and sesendok which were 3.0%, 2.4%, and 0.8%, respectively. Based on the basic property study, batai, ludai, mahang, and sesendok could be suitable for pulp and paper, plywood, light construction, furniture, interior finishing, and general utility. Fibre length, fibre wall thickness, and vessel diameter correlated significantly with density and mechanical properties. Shrinkage and mechanical properties were significantly influenced by density.

show abstract

Section: Physical and Mechanical Propertiessupporting

confidence: 91%

Anatomical, physical, and mechanical properties of four pioneer species in Malaysia

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Previously, Setter et al [26] indicated that the forest species' density and porosity influence the mechanical resistance to shear. In the same way, Alia-Syahirah et al [27] reported that a higher density can negatively affect adhesion in wood products. Despite these preceding studies, wood density was discarded as a negative factor because all the species showed a similar density value.…”

Section: Discussionmentioning

confidence: 80%

“…The first is wettability, the adhesive's capacity to establish contact with the wood surface. This property plays a crucial role in the ability of liquid sealants to spread and infiltrate wood cells, ultimately impacting the bonding strength between the two surfaces [27]. In this step, the adhesive molecules interact with the wood surface through molecular forces such as Van der Waals, hydrogen bonding, and dipole-dipole interactions [32].…”

Section: Discussionmentioning

confidence: 99%

Feasibility of Bonding High-Moisture-Content Wood Using Nothofagus chilean Species

Rosales,

Rodríguez-Grau,

Galarce

et al. 2023

Forests

View full text Add to dashboard Cite

Appraising and protecting forests requires a management plan and the creation of innovative products for the market. The development of the green gluing technique could add value to native timber. However, there is a lack of knowledge concerning the response and the productive process of Nothofagus species using this technique. This work investigated the viability of implementing the green gluing method using three types of Nothofagus. Wood pieces were made using a one-component polyurethane adhesive. Delamination, shear tests, morphological characterization, and bond line thickness analysis tested their capacity. The results showed a variable response depending on the Nothofagus type, where the surface treatment could improve the green gluing performance. The findings highlight the relevance of increasing knowledge about the essayed species and their preparation to maintain their natural moisture condition.

show abstract

“…The void size in the wood may influence surface roughness. Wood with a larger lumen and diameters would usually result in open grain after machining, which leads to higher surface roughness (Syahirah et al, 2019). In this work, surface roughness of the woods tested should be important for determining its SFE and wettability for both water-based acrylic and oil-based alkyd varnish.…”

Section: Surface Roughnessmentioning

confidence: 99%

Influence of surface roughness of ten tropical woods species on their surface free energy, varnishes wettability and bonding quality

Darmawan

Ginting

Gayatri

et al. 2020

PRT

View full text Add to dashboard Cite

Purpose The surface characteristics of wood such as surface roughness, surface free energy (SFE) and wettability are important properties influencing further manufacturing processes such as gluing and coating. The purpose of this study is to determine the influence of surface roughness of ten tropical woods on their SFE, wettability and bonding quality for water-based acrylic and solvent-based alkyd varnishes. Design/methodology/approach The woods tested in this study were fast-growing teak, afrika, sungkai, mindi, merbau, durian, lamtoro, pulai, acacia and kempas. Wood surfaces were prepared in unsanded and sanded using an abrasive paper of 120 grits. SFE values were calculated based on the Rabel method. Wettability values were measured based on the contact angle between varnish liquids and wood surfaces using the sessile drop method, and the S/G model was used to evaluate the wettability of the varnishes on the woods surface. The bonding quality of the varnishes was measured using a cross-cut test based on the ASTM 3359-02 standard. Findings The results show that unsanded kempas wood had the roughest surface with a Ra value of 16.24 µm, whereas sanded lamtoro wood has the smoothest surface with a Ra value of 6.86 µm. The unsanded afrika wood had the highest SFE value of 53.61 mJ/m2, whereas sanded fast-growing teak had the lowest SFE value of 36.17 mJ/m2. Sanded merbau woods had the lowest K value of 0.022 for the water-based acrylic varnish, whereas unsanded afrika wood had the highest K value of 9.253 for the alkyd varnish. Afrika wood with the highest K values (highest wettability) for both acrylic and alkyd varnishes produced the highest bonding quality (grade 4-5). Compared to the water-based acrylic varnish, the solvent-based alkyd varnish was more wettable and generated better bonding quality. Research limitations/implications Improving the quality of fast-growing wood from plantation by painting could be considered to increase their use for higher value wood products. Practical implications Compared to water-based acrylic varnish, solvent-based alkyd varnish was more wettable and generated better bonding quality. Originality/value The originality of this research is to evaluate the values of surface free energy. SFE could be used to quantitatively determined the wettability of paints liquid in the surface of wood

show abstract

Effects of Anatomical Characteristics and Wood Density on Surface Roughness and Their Relation to Surface Wettability of Hardwood

Cited by 11 publications

References 9 publications

Anatomical, physical, and mechanical properties of four pioneer species in Malaysia

Anatomical, physical, and mechanical properties of four pioneer species in Malaysia

Feasibility of Bonding High-Moisture-Content Wood Using Nothofagus chilean Species

Influence of surface roughness of ten tropical woods species on their surface free energy, varnishes wettability and bonding quality

Contact Info

Product

Resources

About