PDF(Pubmed)
Abstract：
Photothermal materials have gained considerable attention in the field of anti-/de-icing due to its environmental friendliness and energy saving. However, it is always significantly challenging to obtain solar thermal materials with hierarchical structure and simultaneously demonstrate both the ultra-long icing delay ability and the superior photothermal de-icing ability. Here, a photothermal icephobic MOF-based micro and nanostructure surface (MOF-MNS) is presented, which consists of micron groove structure and fluorinated MOF nanowhiskers. The optimal MOF-M250 NS can achieve solar absorption of over 98% and produce a high temperature increment of 65.5 °C under 1-sun illumination. Such superior photothermal-conversion mechanism of MOF-M250 NS is elucidated in depth. In addition, the MOF-M250 NS generates an ultra-long icing delay time of ≈3960 s at -18 °C without solar illumination, achieving the longest delay time, which isn\'t reported before. Due to its excellent solar-to-heat conversation ability, accumulated ice and frost on MOF-M250 NS can be rapidly melted within 720 s under 1-sun illumination and it also holds a high de-icing rate of 5.8 kg m-2 h-1 . MOF-M250 NS possesses the versatility of mechanical robustness, chemical stability, and low temperature self-cleaning, which can synergistically reinforce the usage of icephobic surfaces in harsh conditions.
摘要：
光热材料由于其环境友好性和节能性在防冰/除冰领域得到了广泛的关注。然而,获得具有分层结构的太阳能热材料并同时表现出超长结冰延迟能力和优越的光热除冰能力始终是巨大的挑战。这里,提出了一种基于光热疏冰MOF的微米和纳米结构表面（MOF-MNS），由微米沟槽结构和氟化MOF纳米晶须组成。最佳的MOF-M250NS可以实现超过98％的太阳能吸收，并在1太阳照射下产生65.5°C的高温增量。深入阐明了MOF-M250NS的这种优越的光热转换机制。此外,MOF-M250NS在没有阳光照射的情况下，在-18°C下产生约3960s的超长结冰延迟时间，实现最长的延迟时间，这是之前没有报告的。由于其出色的太阳能与热能对话能力，MOF-M250NS上积聚的冰和霜可以在1太阳照射下在720s内迅速融化，并且还具有5.8kgm-2h-1的高除冰率。MOF-M250NS具有机械坚固性的多功能性，化学稳定性,和低温自清洁，这可以协同地加强在恶劣条件下的疏冰面的使用。
