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相关概念视频

Wood Products01:21

Wood Products

79
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...
79
Wood Panel Products01:18

Wood Panel Products

70
Wood panel products are essential materials used in construction for applications such as flooring, siding, and roofing, typically available in standard dimensions of 4 feet by 8 feet, with thicknesses varying from one-quarter of an inch to one and one-eighth inches. Among the most common types of wood panels is plywood, which is produced by gluing multiple layers of thin wood veneers under pressure. The grain of the outer veneers runs lengthwise, while the grains of the interior layers run...
70
Thermal Insulation in Masonry Walls01:22

Thermal Insulation in Masonry Walls

104
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....
104
Introduction to Wood01:19

Introduction to Wood

204
Wood, derived from trees, is a versatile and widely used construction material. Trees feature a trunk surrounded by a protective layer of dead bark. Beneath this outer layer lies the living bark, followed by the cambium, and then the sapwood which transitions into heartwood as it matures. At the center of the trunk is the pith. The age of a tree can be discerned by examining its growth rings, which are concentric bands visible in the trunk's cross-section.
The structural integrity of the...
204
Composite Masonry Walls01:18

Composite Masonry Walls

808
Composite masonry walls combine multiple wythes of the same or different masonry materials to create a unified structure. These walls feature wythes that are bonded together either through mortar-filled collar joints, grouted spaces, or more commonly, with rigid metal ties and reinforcements, with the use of masonry header units being rare. Metal ties are preferred because they effectively minimize water penetration, as these walls primarily absorb moisture and then release it into the...
808
Softwoods and Hardwoods01:28

Softwoods and Hardwoods

137
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,...
137

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相关实验视频

Updated: Jun 2, 2025

Fabrication and Design of Wood-Based High-Performance Composites
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Fabrication and Design of Wood-Based High-Performance Composites

Published on: November 9, 2019

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超紫外屏蔽透明木材,用于隔热窗户的改进接口.

Jingyu Wu1, Yun Shi1, Xiaolu Wen1

  • 1MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China.

ACS applied materials & interfaces
|January 16, 2025
PubMed
概括

透明木材复合材料为节能窗户提供了改进的光学和机械性能. 这种新材料有效地阻紫外线辐射,并提供出色的隔热,性能优于传统玻璃.

关键词:
4 - 乙烯基 - 乙烯基酸 - 乙烯基酸绝缘的绝缘是一种绝缘.透明的木材 透明的木材阻紫外线的紫外线

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相关实验视频

Last Updated: Jun 2, 2025

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科学领域:

  • 材料科学 材料科学 材料科学
  • 可持续建筑材料 可持续建筑材料
  • 聚合物复合材料 聚合物复合材料

背景情况:

  • 透明木材 (TW) 正在探索节能建筑产品,但在尺寸,厚度和功能填充物集成方面面临限制.
  • 现有的TW技术正在与光学和机械性能妥协作斗争,这阻碍了在窗口应用中广泛使用.

研究的目的:

  • 开发一种具有增强光学,机械,隔热和紫外线屏蔽性能的木材复合材料 (WCM).
  • 为了克服现有的透明木材的局限性,利用 peracetic acid (PAA) 脱,并将4-vinylphenylboric acid (VPBA) 纳入.

主要方法:

  • 使用 peracetic acid (PAA) 制备了脱木材 (DW),以获得更好的结构完整性和聚合物透.
  • 甲基甲酸盐 (MMA) 和4-乙烯基酸 (VPBA) 用于创建木材复合材料 (WCM).
  • 评估了WCM的光学,机械,紫外线阻断和隔热性能.

主要成果:

  • 通过PAA脱,保留了半纤维素和孔状结构,使得木材更厚,更大,更透明.
  • 该WCM实现了大约90%的透射率和55%的雾,机械强度为64.5MPa.
  • 该材料有效地阻断了100%的UV-C和UV-B,以及90%的UV-A辐射,同时保持了可见光透射率.
  • 与传统玻璃相比,WCM的导热率较低,表明其绝热性能优越.

结论:

  • 开发的WCM为窗户应用提供了对传统玻璃的有希望的替代品,因为其优越的光学,机械,UV阻断和热绝缘性能.
  • 使用PAA和VPBA为克服透明木材技术现有的局限性提供了一条途径.
  • 这种先进的材料非常适合节能建筑产品和可持续建筑.