文献类型：期刊文献

英文题名：Strong double networked hybrid cellulosic foam for passive cooling

作者：Geng, Aobo[1] Han, Yanming[1] Cao, Jingyun[1] Cai, Chenyang[2]

第一作者：耿奥博

通信作者：Geng, AB[1];Cai, CY[2]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Key Lab Wood Sci & Technol, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ, Coll Mat Sci & Engn, Nanjing 210037, Jiangsu, Peoples R China

年份：2024

卷号：264

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20241115725493);Scopus(收录号：2-s2.0-85187200048);WOS:【SCI-EXPANDED(收录号:WOS:001221145400001)】；

基金：C.C. thanks the support of the Start-up Funds for Scientific Research at the Nanjing Forestry University (163020337) , Natural Science Foundation of Jiangsu Province (BK20230404) .

语种：英文

外文关键词：Cellulose nanofiber; Foam; Passive cooling

摘要：Up to now, energy conservation, emission reduction, and environmental protection are still the goals that humanity continuously pursues. Passive radiative cooling is a zero-consumption cooling technology, which gains more and more attention. However, the contraction between mechanical strength and cooling performance of traditional radiative cooling materials still limits their scalable production. In this work, we developed a strong double-networked hybrid cellulosic foam via crosslinking recyclable CNF and PVA with a silane coupling agent in the freeze-drying process. Meanwhile, nano zinc oxide and MOF were added to improve the mechanical and solar scattering of foam. Benefiting from the synergistic solar scattering of ZnO and MOF and the stable double crosslinking network, the as-prepared hybrid cellulosic foam exhibits high solar reflectivity of 0.965, high IR emissivity of 0.94, ultrahigh mechanical strength of and low thermal conductivity. Based on above results, the hybrid cellulosic foam shows high-performance daytime cooling efficiency of 7.5 degrees C under direct sunlight in the hot region (Nanjing, China), which can serve as outdoor thermal-regulation materials. This work demonstrates that biomass materials possess the enormous potential of in thermal regulating materials, and also provides great possibilities for their applications in energy conservation, environmental protection and green building materials.