A thermal insulation composite from hollow silica particles mixed with cellulose fibers

 https://phys.org/news/2022-09-thermal-insulation-composite-hollow-silica.html

"thermal insulation composite by mixing cellulose fibers and HSPs in water, then pouring the mixture in molds and removing the water through a freeze-drying technique. We demonstrated that our composite is highly stable to moisture... This addresses the long-standing issue of using HSPs as thermal materials"

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