Superhydrophobic stereocomplex-type polylactide/ultra-fine glass fibers aerogel for passive daytime radiative cooling

被引：0

作者：

Liao, Shichang ^{[1
,2
]}

Bai, Dongyu ^{[2
]}

Jia, Yijing ^{[2
]}

Sun, Jiahui ^{[1
,2
]}

Liu, Huili ^{[3
]}

Li, Lu ^{[2
]}

Xu, Maowen ^{[1
]}

机构：

[1] Southwest Univ, Sch Mat & Energy, Chongqing 400715, Peoples R China

[2] Chongqing Univ Arts & Sci, Sch Mat Sci & Engn, Chongqing Key Lab Mat Surface & Interface Sci, Chongqing 402160, Peoples R China

[3] Chongqing Univ Arts & Sci, Chongqing Key Lab Resource Utilizat Heavy Met Wast, Chongqing 402160, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2024年 / 274卷

基金：

中国国家自然科学基金;

关键词：

Passive daytime radiative cooling; Polylactide; Stereocomplex; Aerogel; Ultra -fine glass fiber; POLY(LACTIC ACID); CELLULOSE;

D O I：

10.1016/j.ijbiomac.2024.133470

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Passive daytime radiative cooling (PDRC) technology offers a green and sustainable strategy for cooling, eliminating the need for external energy sources through its exceptional efficiency in heat radiation and sunlight reflection. Despite its benefits, the widespread usage of non-biodegradable PDRC materials has unfortunately caused environmental pollution and resource wastage. Furthermore, the effectiveness of outdoor PDRC materials can be significantly diminished by rainfall. In this work, a superhydrophobic composite aerogel composed of stereocomplex-type polylactide and ultra-fine glass fiber has been successfully developed through simple physical blending and freeze-drying, which exhibits low thermal conductivity (36.26 mW m-1 K- 1) and superhydrophobicity (water contact angle up to 150 degrees). Additionally, its high solar reflectance (91.68 %) and strong infrared emissivity (93.95 %) enable it to effectively lower surface temperatures during daytime, resulting in a cooling effect of approximately 3.8 degrees C below the ambient temperature during the midday heat of summer, with a cooling power of 68 W/m2. This aerogel offers an environmentally friendly and sustainable approach for the utilization of radiative refrigeration materials, paving the way for environmental protection and sustainable development.

引用

页数：9