Leaf-vein-inspired robust and UV-resistant nanocomposite paper for passive building cooling and fire protection

被引：0

作者：

Wu, Jianyu ^{[1
,2
]}

Xia, Linmin ^{[3
]}

Shen, Yiqin ^{[1
]}

Tan, Chenshu ^{[1
,2
]}

Su, Jiayun ^{[1
,2
]}

Yang, Yuying ^{[1
,2
]}

Yu, Yan ^{[1
,2
]}

Yang, Rilong ^{[1
,2
]}

机构：

[1] Fujian Agr & Forestry Univ, Coll Mat Engn, Fuzhou 350108, Peoples R China

[2] Natl Forestry & Grassland Adm, Key Lab Plant Fiber Funct Mat, Fuzhou 350002, Peoples R China

[3] Sichuan Univ Sci & Engn, Coll Biotechnol, Yibin 644000, Peoples R China

来源：

SUSTAINABLE MATERIALS AND TECHNOLOGIES | 2025年 / 43卷

关键词：

Radiative cooling; Hydroxyapatite nanowire; Nanocellulose; Flame resistance; Anti-UV aging; FIBER;

D O I：

10.1016/j.susmat.2024.e01202

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Passive daytime radiative cooling (PDRC) technology is a promising technology that can realize zero-energy consumption. The flexible PDRC materials attract much attention owing to their broad applicability. However, the flexible PDRC materials always show unsatisfactory mechanical performance, especially when exposed to prolonged sunlight irradiation. In addition, their fire resistance is also a cause for concern. Herein, inspired by the hierarchical leaf vein structure, a pliable, UV-resistant, nonflammable, robust nanocomposite cooling paper (HTP) composed of hydroxyapatite nanowires (HNWs) and TEMPO-oxidized cellulose nanofibers (TOCNFs) is developed. Through customizing interfacial engineering to introduce physical entanglement and multiple bonding, the leaf-vein-analogous hollow networks formed by HNWs are reinforced by TOCNFs, fully leveraging the advantages of one-dimensional inorganic HNWs and organic TOCNFs at the nanoscale. This enables the HTP to achieve excellent mechanical strength and PDRC performance with a small amount of TOCNFs doping. HTP exhibit a high tensile strength of 48.56 MPa and Young's modulus of 3.07 GPa, surpassing most previously reported flexible PDRC materials. Furthermore, HTP demonstrates outstanding flame resistance and anti-UV aging properties, which benefit from frameworks formed by HNWs and TOCNFs. The exceptional overall performance overcomes the limitations of conventional polymer-based flexible PDRC materials, significantly advancing the practical application of flexible PDRC materials, especially for building cooling.

引用

页数：10