Cellulose-Based Hybrid Structural Material for Radiative Cooling,Nano Letters

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Cellulose-Based Hybrid Structural Material for Radiative Cooling
Nano Letters ( IF 9.6 ) Pub Date : 2020-12-10 , DOI: 10.1021/acs.nanolett.0c03738
Yipeng Chen ₁ , Baokang Dang ₁ , Jinzhou Fu ₂ , Chao Wang ₁ , Caicai Li ₁ , Qingfeng Sun ₁ , Huiqiao Li _{2,

3}

Affiliation

Structural materials with excellent mechanical properties are vitally important for architectural application. However, the traditional structural materials with complex manufacturing processes cannot effectively regulate heat flow, causing a large impact on global energy consumption. Here, we processed a high-performance and inexpensive cooling structural material by bottom-up assembling delignified biomass cellulose fiber and inorganic microspheres into a 3D network bulk followed by a hot-pressing process; we constructed a cooling lignocellulosic bulk that exhibits strong mechanical strength more than eight times that of the pure wood fiber bulk and greater specific strength than the majority of structural materials. The cellulose acts as a photonic solar reflector and thermal emitter, enabling a material that can accomplish 24-h continuous cooling with an average dT of 6 and 8 °C during day and night, respectively. Combined with excellent fire-retardant and outdoor antibacterial performance, it will pave the way for the design of high-performance cooling structural materials.

中文翻译：

用于辐射冷却的纤维素基混合结构材料

具有优异机械性能的结构材料对于建筑应用至关重要。但是，传统的制造工艺复杂的结构材料无法有效调节热流，对全球能源消耗造成很大影响。在这里，我们通过将脱木质素的生物质纤维素纤维和无机微球自底向上组装到3D网络主体中，然后进行热压工艺，来加工了一种高性能且价格便宜的冷却结构材料；我们构建了一种冷却的木质纤维素散装材料，其机械强度比纯木纤维散装材料强八倍，并且比大多数结构材料具有更高的比强度。纤维素充当光子太阳能反射器和热辐射器，使材料能够在白天和晚上分别以6和8°C的平均dT完成24小时连续冷却。结合出色的阻燃性和户外抗菌性能，将为高性能冷却结构材料的设计铺平道路。

更新日期：2021-01-13

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