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Wood surfacing is a critical finishing process designed to smoothen the wood surface, enhance its dimensional accuracy, and make handling safer. This process compensates for potential shrinkage during the seasoning phase by marginally increasing the wood dimensions before surfacing. It also helps correct some distortions that may occur as the wood dries.
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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.
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Softwoods and hardwoods, derived from different types of trees, are distinguished by their leaf structures and cellular compositions, each serving unique purposes in construction and manufacturing. Softwoods come from cone-bearing trees with needle-like leaves and are predominantly composed of longitudinal cells called tracheids and a smaller proportion of radial cells known as rays. Due to their cellular structure, softwoods are commonly used in construction for structural frames, sheathing,...
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The process of manufacturing concrete masonry units begins by mixing stiff concrete composed of Portland cement, aggregates, and water. This mixture is then poured into metal molds. To ensure the concrete settles uniformly and to avoid separation of its components, the mixture in the molds is subjected to vibration. Shortly after, the still-wet blocks are removed from the molds and placed on racks.
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An Efficient, Low-Cost Surface Activation toward Multifunctional Wood Manufacturing.

Kun Zhang1, Xiaozhen Liu2, Xueqin Fan1

  • 1Key Laboratory of Bio-based Material Science & Technology (Ministry of Education), Northeast Forestry University, Harbin 150040, China.

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Summary

A novel UV-assisted hydrogen peroxide (H2O2) surface activation method simplifies wood functionalization for sustainable applications. This efficient process enhances wood properties like fire resistance and mold prevention, offering cost and environmental benefits.

Keywords:
functionalizationimpregnation treatmentphotoassisted oxidationsurface activationwood nanomodification

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Area of Science:

  • Materials Science
  • Sustainable Chemistry
  • Wood Science

Background:

  • Traditional wood modification methods are often complex and hinder practical applications.
  • Sustainable development goals necessitate efficient and eco-friendly wood functionalization techniques.

Purpose of the Study:

  • To develop a simple, efficient, and low-cost surface activation method for multifunctional wood manufacturing.
  • To enhance wood properties for applications in energy-efficient buildings, lightweight vehicles, and water treatment.

Main Methods:

  • UV-assisted hydrogen peroxide (H2O2) treatment for photoassisted oxidation of wood surfaces.
  • Utilizing capillary forces for automatic impregnation of functional precursors.
  • Incorporating ammonium polyphosphate for fire and mold resistance.

Main Results:

  • Oxidized wood cell walls showed increased hydroxyl groups, enhancing impregnation.
  • Ammonium polyphosphate-activated wood exhibited significantly improved fire resistance (39% lower heat release, 1.71x longer ignition time) and mold prevention.
  • Techno-economic analysis indicated substantial reductions in energy (92.5%) and reagent costs (76.8%), with increased market profitability (169.1%).
  • Life cycle assessment revealed a 43% reduction in carbon emissions compared to traditional methods.
  • Surface activation enabled fluorescence and photothermal conversion through fluorophore and graphite impregnation.

Conclusions:

  • The UV-assisted H2O2 surface activation is a highly efficient, cost-effective, and customizable approach for creating multifunctional wood materials.
  • This method significantly advances low-carbon manufacturing of wood products with enhanced properties and reduced environmental impact.