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Related Concept Videos

Wood Products01:21

Wood Products

241
Wood products encompass a broad range of materials crafted from wood strands, veneers, lumber, and even waste wood-like shreds, designed for both structural and nonstructural purposes. Various specialized wood products have been developed to enhance strength, durability, and versatility in building applications.
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
241
Lumber01:19

Lumber

312
Lumber is derived from logs which are harvested, debarked, and processed into long pieces with a rectangular cross-section. The transformation of logs into lumber involves multiple steps, beginning with an automated saw that slices the log into slabs. These slabs are then transported via a conveyor belt to smaller saws, where they are cut into square-edged pieces of specific widths.
Initially, the surfaces of these lumber pieces are rough, and their dimensions may vary slightly from one end to...
312
Seasoning of Wood01:15

Seasoning of Wood

355
Seasoning of wood is a crucial process aimed at reducing and stabilizing the moisture content within the wood to prevent future shrinkage, structural damage, or aesthetic issues once the wood is used in construction. Wood naturally swells when it absorbs moisture and contracts as it dries.
Achieving equilibrium moisture content is the goal of seasoning; this is the point where the wood's moisture content stabilizes to align with the moisture levels of the surrounding environment. Proper...
355
Thermal Insulation in Masonry Walls01:22

Thermal Insulation in Masonry Walls

408
In hot, dry climates, the thermal mass of masonry walls can be beneficial, absorbing heat during the day and releasing it at night, thereby stabilizing indoor temperatures. However, in most other climates, additional insulation is necessary to enhance thermal resistance.
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
408
Structural Properties and Dimensions of Lumber01:21

Structural Properties and Dimensions of Lumber

336
Wood's structural properties derive from fibers aligned along the tree's length, contributing significantly to its mechanical strength. Wood exhibits up to twenty times greater tensile strength along these fibers compared to across them, and generally shows better performance under compression than tension. The length of fibers varies, with hardwoods having fibers around one twenty-fifth inch long and softwoods ranging from one-eighth to one-third inch.
The strength characteristics of...
336

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Production and Testing of Moisture Behavior and Thermal Properties of Rapeseed Straw and Ganoderma resinaceum Mycelium Bio-Composites
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Improving Thermal Conductivity Coefficient in Oriented Strand Lumber (OSL) Using Sepiolite.

Hamid R Taghiyari1, Abolfazl Soltani2, Ayoub Esmailpour3

  • 1Wood Science and Technology Department, Faculty of Materials Engineering & New Technologies, Shahid Rajaee Teacher Training University, Tehran 1678815811, Iran.

Nanomaterials (Basel, Switzerland)
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PubMed
Summary

Adding nanoscale sepiolite to urea-formaldehyde resin in oriented strand lumber (OSL) significantly improves thermal conductivity and panel hardness. This enhancement facilitates better resin polymerization in engineered wood products.

Keywords:
composite panelsmineral materialsoriented strand lumber (OSL)sepiolitethermal conductivity coefficient

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Area of Science:

  • Materials Science
  • Wood Composites
  • Nanotechnology

Background:

  • Engineered wood products like oriented strand lumber (OSL) suffer from low thermal conductivity, hindering heat transfer.
  • Efficient heat transfer is crucial for resin polymerization and composite mat core treatment.

Purpose of the Study:

  • To investigate the impact of nanoscale sepiolite on the thermal conductivity of oriented strand lumber (OSL).
  • To evaluate the effect of sepiolite-enhanced thermal conductivity on the hardness and resin polymerization of OSL panels.

Main Methods:

  • Sepiolite (1:15 aspect ratio) was mixed with urea-formaldehyde (UF) resin at 10% by dry weight.
  • OSL panels were manufactured with 8% and 10% resin content, with and without sepiolite.
  • Core temperature, thermal conductivity (Fourier's Law), and Janka ball hardness were measured.

Main Results:

  • Sepiolite addition increased OSL thermal conductivity by 36% (8% resin) and 40% (10% resin).
  • Sepiolite-treated panels exhibited higher core temperatures, indicating improved heat transfer.
  • Panel hardness significantly increased with sepiolite content, attributed to enhanced resin curing.

Conclusions:

  • Nanoscale sepiolite effectively enhances the thermal conductivity of OSL panels.
  • Improved thermal conductivity leads to more complete resin polymerization and increased panel hardness.
  • Sepiolite is a promising additive for improving the performance of engineered wood products.