Archive
Tag: Materials Science
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What PFAS actually are: one definition, thousands of substances
PFAS is not a substance or a class of similar substances but a structural definition covering roughly 10,000 chemicals. What the carbon–fluorine bond does, why the families behave differently, and…
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Can paper block electromagnetic interference? Only if you stop it reflecting
Every powered device emits electromagnetic energy and is vulnerable to it, and shielding is a regulatory requirement. Cellulose shields nothing on its own, but its porosity enables absorption-dominant shielding that…
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Bark-based polyurethane foams: the hydroxyl groups are on the wrong backbone
Bark is rich in hydroxyl groups, which is exactly what a polyurethane polyol needs. The difficulty is that they sit on rigid aromatic rings, and almost every route to bark-based…
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Latex is not a raw material: it is a defence system
Latex is stored under pressure throughout the plant and released by injury itself, coagulating within minutes to seal the wound and trap insects. Reading it as defence rather than commodity…
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How mussels glue underwater, and why adhesives engineers keep studying them
Water defeats most adhesives. Mussels bond to wet rock in seconds using a single modified amino acid that both binds surfaces and cross-links protein, provided the chemistry is sequenced correctly.
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The pine cone: a material that opens and closes without energy
A pine cone opens when dry and closes when damp, using no cells, no energy and no moving parts. How the bilayer mechanism works, why the microfibril angle explains it,…
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Molecular Velcro: how the wood cell wall yields without weakening
A tree bends far past the point where an engineering material would be permanently damaged, then stands up again. The explanation is a stick–slip mechanism inside the cell wall: weak…
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Was packaging invented in the twentieth century? Ask a Roman glassblower
Standardised volumes, inert food-contact surfaces, branded containers and a recycling trade: all present in the Roman world. How glassblowing turned a luxury material into everyday packaging, and what that history…
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Lignin: the polymer built without a blueprint
Lignin is the second most abundant biopolymer on Earth and the matrix that allows trees to stand upright. Unusually among biological macromolecules, it is assembled without a genetic template, and…