在水性和干燥绝缘泡中的木材颗粒的尺寸-结构-特性关系
Elizabeth Dobrzanski1, Elisa S Ferreira2, Praphulla Tiwary3
1Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Bioproducts Institute, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
Carbohydrate polymers
|April 14, 2024
概括
松虫杀死的木质颗粒产生轻质的绝缘泡. 较小的木质颗粒产生较低的密度和更好的隔热,适合建筑应用.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续材料 可持续材料
- 木材科学 木材科学 木材科学
背景情况:
- 松虫的侵袭造成了大量的木材废物.
- 轻质绝缘泡对于节能建筑至关重要.
- 从木材废料中开发可持续的绝缘材料是一个活跃的研究领域.
研究的目的:
- 为了研究木质颗粒大小对轻质绝缘泡性能的影响.
- 为了建立粒子大小,泡结构和绝缘性能之间的关系.
- 评估这些泡作为可持续建筑绝缘材料的潜力.
主要方法:
- 使用粉碎尺寸的松虫杀死木材颗粒 (125-1000微米),聚合物粘合剂和表面活性剂制备绝缘泡.
- 形成水性泥的泡,然后在烤箱中干燥.
- 泡的稳定性,结构 (使用X射线微型计算机断层扫描),密度,导热率和压力强度的表征.
主要成果:
- 水性泡的稳定性随着木材颗粒大小的减少而增加.
- 干泡表现出类似的细胞大小分布,但细胞壁结构的差异被观察到.
- 较小的木质颗粒导致密度较低,导热率降低 (<0.047 W m-1 K-1),压力强度降低.
- 较大的木质颗粒导致更密集的细胞壁,具有更高的抗变形能力.
结论:
- 木材颗粒大小显著影响绝缘泡的结构性质关系.
- 由较小的木质颗粒制成的泡具有优越的绝热性能.
- 这些木制泡的性能与扩展聚钢/聚氨相美,表明它们作为可持续建筑绝缘材料的可行性.
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