Cell Reports Physical Science<\/a>, this innovative coating could revolutionize how we think about energy use in \u00a0urban environments\u00a0.<\/p>\n<\/p>\n
Impressive Cooling Performance<\/h2>\n
The \u00a0field tests\u00a0, conducted on rooftops in Zhengzhou, produced astonishing results. During peak sunlight, the material achieved its maximum cooling effect of \u00a09.2 \u00b0C\u00a0 below the ambient temperature. On average, it recorded a cooling effect of \u00a0-4.9 \u00b0C\u00a0 during the day and \u00a0-5.1 \u00b0C\u00a0 at night, which translates to a cooling capacity of about \u00a0136 watts per square meter\u00a0. This level of performance could significantly alleviate the pressure on electrical grids in urban areas, especially during hot summer months.<\/p>\n
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The Science Behind Passive Radiative Cooling<\/h2>\n
The new cooling material employs a well-known phenomenon called \u00a0“passive radiative cooling” (PRC)\u00a0. In essence, it does two crucial things: it reflects \u00a0sunlight\u00a0, preventing heat buildup, and emits internal heat into the atmosphere. The researchers revealed that applying this film on rooftops in a city like \u00a0Lhasa, Tibet\u00a0, could potentially reduce annual cooling energy consumption by up to \u00a020.3%\u00a0.<\/p>\n
<\/p>\n
Innovative Material Composition<\/h2>\n
This revolutionary film, referred to as \u00a0\u201cmetaphilm,\u201d\u00a0 is made from polylactic acid (PLA), which is produced from plant sources like corn or sugarcane, thereby making it biodegradable. Remarkably, researchers have developed a method to create a highly porous and continuous structure using a novel \u00a0phase separation\u00a0 technique at low temperatures.<\/p>\n
<\/p>\n
Exceptional Thermal Properties<\/h2>\n
This \u00a0microstructure\u00a0 exhibits ultra-low thermal conductivity (0.049 W\/m\u00b7K) and reflects almost all solar radiation (98.7%), thereby minimizing heat transfer into the interior spaces. Additionally, the material’s porosity allows it to effectively emit heat, further enhancing its cooling ability.<\/p>\n
<\/p>\n
Scalable Manufacturing Process<\/h2>\n
The manufacturing steps are quite straightforward: PLA is dissolved in \u00a0chloroform\u00a0, crystallized at a chilling temperature of \u00a0-20 \u00b0C\u00a0, and \u00a0ethanol\u00a0 is employed to cause phase separation before the film is dried. This efficient manufacturing technique positions the product well for large-scale commercial production, making it an appealing option for builders and architects focusing on sustainability.<\/p>\n
<\/p>\n
Durability and Longevity of the Material<\/h2>\n
While many biodegradable materials struggle with durability, this new coating has exhibited exceptional resilience. Researchers put the material through rigorous tests, including submersion in \u00a0acid\u00a0 for \u00a0120 hours\u00a0 followed by exposure to ultraviolet radiation equivalent to eight months of weathering. Remarkably, this product maintained a cooling performance between \u00a05 \u00b0C\u00a0 and \u00a06.5 \u00b0C\u00a0 below ambient temperature despite enduring these harsh conditions. The success is attributed to its high \u00a0crystallinity\u00a0, which grants it enhanced thermal and chemical stability over other materials in its class.<\/p>\n
<\/p>\n
Broad Applications Beyond Building Cooling<\/h2>\n
The potential applications of this innovative bioplastic extend well beyond just cooling buildings. Researchers are already exploring possibilities in \u00a0transportation\u00a0\u2014to cool vehicles, in \u00a0agriculture\u00a0\u2014to protect crops, in \u00a0electronics\u00a0, and even in the \u00a0biomedical sector\u00a0\u2014for temperature-regulating dressings. This versatility showcases the vast potential of the material in tackling various \u00a0environmental\u00a0 and \u00a0energy\u00a0 challenges.<\/p>\n
<\/p>\n
In summary, the development of this bioplastic cooling film represents a significant stride towards energy-efficient sustainable construction. By mitigating the heat from sunlight without the need for electricity, this research could redefine our approach to cooling in urban settings and contribute meaningfully to global sustainability goals.<\/p>\n
\n
General News – 2<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"A Revolutionary Bioplastic Material for Sustainable Cooling A world where buildings require no electricity for \u00a0cooling\u00a0 is not just a dream anymore. \u00a0Chinese\u00a0 and \u00a0Australian\u00a0 scientists have unveiled a groundbreaking bioplastic material that promises to keep interiors cool without consuming a single watt of electricity. This innovative work signifies a potential leap forward for sustainable […]<\/p>\n","protected":false},"author":1,"featured_media":152660,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36399],"tags":[42,2397,37887,8964,1845,3618],"class_list":["post-152659","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-buildings","tag-china","tag-cools","tag-developed","tag-electricity","tag-material"],"_links":{"self":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/152659","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/comments?post=152659"}],"version-history":[{"count":0,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/152659\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media\/152660"}],"wp:attachment":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media?parent=152659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/categories?post=152659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/tags?post=152659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}