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nn Experts at the University of Warwick have recently devised a new class of high-tech foams, when they have realized that exposing particular mixtures of polymer particles and other materials to sudden freeze-drying drastically modifies their internal structure. Chemists and engineers at the university report that the new materials could have a wide range of possible, real-life applications, including in creating new types of low-power room temperature gas sensors. Details of the innovation appear in a paper entitled “Conducting Nanocomposite Polymer Foams from Ice-Crystal-Templated Assembly of Mixtures of Colloids,†which made the front cover in the latest issue of the scientific journal Advanced Materials. “This new process allows us to create interesting foam-based nanocomposite materials which show promising results as gas sensors that can operate at room temperature and differ from traditional metal-oxide-based sensors,†University of Warwick Department of !
Chemistry expert Dr. Stefan Bon, who has also been the lead researcher on the new investigation, explains. This is not the first time experts use dry-freezing to create structured foams, but other methods have either yielded weaker structures, or are too complex to introduce at the large scale.
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http://news.softpedia.com/news/Armor-Foam-Made-from-Dry-Frozen-Polymer-Nanoparticles-117763.shtml
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