高强度有机无机复合材料具有优异的绝热和声衰减
Divya Iyer1, Mohammad Galadari1, Fernaldy Wirawan1
1Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, United States.
ACS polymers Au
|February 19, 2024
概括
研究人员创建了具有优良热和声学性能的轻质聚氨/克林诺皮托利特 (PUC) 复合材料. 这些可持续材料具有优越的强度,比传统水泥更轻,对先进的建筑应用有很大的希望.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 纳米技术 纳米技术
背景情况:
- 传统的复合材料通常在高填充载荷时遭受颗粒聚合的损害.
- 开发具有增强热和声学性能的轻质材料对于可持续建筑和先进应用至关重要.
- 聚氨 (PU) 和clinoptilolite (天然热带石) 是丰富的材料,具有复合材料制造的潜力.
研究的目的:
- 为了展示高填充,轻量级有机-无机复合材料的简单制造方法.
- 研究聚氨/克林诺皮托利特 (PUC) 复合材料的特性,重点是减轻颗粒聚合和增强功能特性.
- 通过系统地改变成分和有机成分来探索PUC复合材料性能的可调性.
主要方法:
- 聚氨与自然存在的克林诺皮托利特微粒的共价结合.
- 复合材料组成的系统变化 (二酸,聚氨,无机含量,聚来源).
- 孔隙性,密度,机械性能 (柔性强度,拉伸能力),隔热和声衰减的表征.
主要成果:
- PUC复合材料有效地减轻了在高填充量时的颗粒聚合.
- 与干燥墙和石膏相比,实现了增强的隔热和声衰减.
- 具有与普通波特兰水泥 (OPC) 相似的屈曲强度和更高的拉伸能力,密度比OPC低1.5倍.
- 通过调整复合材料组成和有机成分来证明属性的调整性.
结论:
- 在温和的条件下,可以使用易于获得的试剂轻松制造高填充,轻质的PUC复合材料.
- PUC复合材料为传统材料提供了有希望的替代品,提供了优越的功能和机械性能.
- 该制造方法具有可扩展性和多功能性,可以容纳原始和回收聚合物,突出其可持续材料利用的潜力.
相关概念视频
01:22Thermal Insulation in Masonry Walls
124
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....
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....
124
01:18Composite Masonry Walls
1.2K
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...
1.2K
01:26Masonry Cavity Walls
1.0K
Cavity walls feature a hollow space between the outer and inner wythes, connected only by corrosion-resistant metal ties. When water seeps through the outer wythe, it descends within this cavity, intercepted by flashing and eventually exiting through weep holes. To enhance moisture resistance, the inner wythe's cavity side often receives damp-proofing, doubling as an air barrier. The cavity can also house insulation to mitigate heat transfer.
Maintaining a clean cavity during construction...
Maintaining a clean cavity during construction...
1.0K
01:22Waterproofing and Anti-Bacterial Admixtures in Concrete
79
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
79
01:28Effects of Air-entrainment in Concrete
85
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
85
01:18Wood Panel Products
72
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...
72