https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/Recent content in Polymers & materials on BioeconHugoen-UShttps://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biopolymers-bioplastics/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biopolymers-bioplastics/Bio-based and biodegradable are independent properties. Bio-PE is renewable and permanent; PBAT is fossil and compostable — and a label that gives one without the other has told you nothing useful.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-pet-bio-meg-bio-pta/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-pet-bio-meg-bio-pta/Thirty per cent of PET is easy to make from plants and seventy per cent is hard, and the split falls exactly where the benzene ring is. Renewable aromatics are the scarce thing.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-nylon/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-nylon/Every property that distinguishes one nylon from another follows from a single number: how many methylene groups sit between amide groups. That ratio explains the strength, the melting point and the water problem at once.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biosynthetic-latex/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biosynthetic-latex/Natural rubber crystallises when you stretch it, and that self-reinforcement at a crack tip is why truck tyres still cannot be made without it. Stereoregularity, not renewability, is the property in question.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-polyols-biopolyurethanes/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-polyols-biopolyurethanes/A vegetable oil’s hydroxyl sits in the middle of the fatty chain, not at its end — so the chain past it hangs loose, carries no load and softens the network. That geometry is the field’s defining limitation.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biodegradable-polyurethane-foams/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biodegradable-polyurethane-foams/Water is the blowing agent, and it blows by reacting with the isocyanate — so the gas that makes the foam and the network that holds it are made by two reactions competing for the same reagent.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-plasticizers/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-plasticizers/A plasticizer is not bonded to the polymer — that is how it works, and it is also why it leaves. Making it renewable does nothing about the leaving.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-antiflammables-flame-retardants/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-antiflammables-flame-retardants/A fire feeds itself: the flame heats the polymer, the polymer supplies fuel. You can break the loop in the gas or in the solid, and the bio-based options work almost entirely in the solid.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/industrial-bio-adhesives/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/industrial-bio-adhesives/A mussel glues itself to a wet rock, which is the hard version of the problem: the adhesive has to displace water from the surface before it can bond to it. Catechol chemistry is how it does that.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-barrier-films/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-barrier-films/The polymers that stop oxygen are ruined by water, and the ones that stop water let oxygen through. No single material does both — which is why packaging is laminated, and why laminates are so hard to compost.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biodegradable-tea-bags-coffee-capsules/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biodegradable-tea-bags-coffee-capsules/A paper tea bag is usually about a fifth plastic, because paper cannot be heat-sealed. And an espresso capsule has to hold nineteen bar, exclude oxygen for a year, then fall apart on command.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-disposable-tableware-for-consumers/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-disposable-tableware-for-consumers/To repel oil you need a surface energy lower than oil’s surface tension, and essentially only fluorine delivers that. Every PFAS-free grease barrier has to block instead of repel.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biosynthetic-paraffin-bio-wax/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/biosynthetic-paraffin-bio-wax/A wax barrier does not work because the molecule is hydrophobic. It works because the molecules crystallise into stacked plates, and everything that permeates has to find its way around them.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-impregnation-for-wood/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-impregnation-for-wood/Brown-rot fungi attack wood with hydroxyl radicals, not enzymes, because radicals are small enough to enter a cell wall an enzyme cannot. Modern wood modification answers that by removing the water instead of poisoning the fungus.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-fdm-filaments-for-3d-printing/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-fdm-filaments-for-3d-printing/PLA prints beautifully and softens in a hot car, and both facts are the same number — a glass transition near 55–60 °C. It is also the number that decides whether the part will compost.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-resins-3d-printing/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-resins-3d-printing/Photopolymerisation turns van der Waals gaps into covalent bonds, so the liquid shrinks as it cures. Managing that shrinkage, and the oxygen that stops the reaction at the surface, is most of the craft.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-printing-filaments-medical/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-printing-filaments-medical/PLGA degrades from the inside out, because its own acidic degradation products catalyse further hydrolysis faster than they can diffuse away. That autocatalysis is why resorbable implants lose strength suddenly rather than gradually.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-printing-inks/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-printing-inks/Linseed oil dries by polymerising with atmospheric oxygen, not by evaporating. Soybean oil is less unsaturated and therefore dries more slowly — which is why soy ink’s real advantages lie elsewhere.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-soot-carbon-black-replacement/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-soot-carbon-black-replacement/Carbon black is not filler in the sense of bulk. It reinforces rubber through surface area and aggregate shape, and a renewable carbon with the wrong morphology is a diluent, not a replacement.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/hempcrete-hemp-construction-materials/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/hempcrete-hemp-construction-materials/Hempcrete is not concrete and cannot carry a building. Its actual mechanisms — insulation from porosity, moisture buffering from hygroscopicity, and a binder that reabsorbs the CO2 its own manufacture released — are more interesting than the name.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/living-concrete-natural-resins/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/living-concrete-natural-resins/Bacteria precipitate limestone by making ammonia, which raises pH until carbonate forms. It works, it heals cracks, and the ammonia it produces is the reason it has not displaced Portland cement.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-isolation/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-isolation/Insulation does not insulate; the trapped air does. Every bio-insulation product is a different engineering route to the same objective: an open pore network that holds air perfectly still.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-bitumen-bio-asphalt-lignin-binders/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-bitumen-bio-asphalt-lignin-binders/Asphalt is stones glued by a colloidal black grease whose stiffness is set by how oxidised it is. Both uses of biology here follow from that sentence: reversing the oxidation restores the glue; lignin supplies an aromatic replacement.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-flooring-bio-based-carpets-cork/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-flooring-bio-based-carpets-cork/The two classic bio-flooring materials predate synthetic polymers entirely, and each gets its defining property from a different mechanism: linoleum polymerises itself in place through oil oxidation; cork was grown with its structure already finished.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-drilling-fluids/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-based-drilling-fluids/A drilling mud must flow fast through the bit and stand still around the cuttings the moment pumps stop. Fermentation polysaccharides do both because their molecules are stiff rods that shed and rebuild their structure with every change in shear.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-furniture-mycelium-grown-wood-bacterial-cellulose/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-furniture-mycelium-grown-wood-bacterial-cellulose/What unites mycelium panels, tree-trained furniture and 3D-printed citrus waste is not a material family but a division of labour: the forming work happens inside a biological process, so the factory’s job shrinks to finishing.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-bedding-mycelium-foam-natural-latex/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-bedding-mycelium-foam-natural-latex/A mattress is two engineering problems solved with one shopping list: an elastomer whose springiness comes from molecular coils, and a protein fibre whose combustion chemistry fights fire by itself.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/living-filtering-materials/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/living-filtering-materials/An ordinary filter separates and fills up; a living one transforms and renews itself. Four quite different technologies — worm beds, electrified biofilms, protein channels, sealed digesters — are answers to what changes when the treatment element stays alive.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-jewelry-grown-pearls-biomineralized-gems/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-jewelry-grown-pearls-biomineralized-gems/Pearl nacre is a ceramic-composite built brick-by-brick by a mollusc at seawater temperature, with fracture resistance orders of magnitude beyond its own mineral. Cultured pearls work because the builder can be transplanted.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-materials-electronics/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-materials-electronics/A gadget holds two different plastic problems — the board inside and the case outside. Biology enters both, but the decisive property on the board is not being bio-based; it is being willing to let go.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/transient-biodegradable-electronics/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/transient-biodegradable-electronics/Every consumer electronic treats water as its final enemy; a transient device makes water its clock. Conductors that corrode on schedule and capsules tuned like drug depots turn disposal into dissolution.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bioplastic-optics-optical-films/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bioplastic-optics-optical-films/Ordinary colour comes from molecules absorbing light; wood pulp can instead produce colour from geometry alone. Renewable optics splits into these two surprises: crystals that self-arrange into mirrors, and sugar-derived plastics clear enough for displays.https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-pet-products-pet-microbiome-bio-cat-litter/Mon, 01 Jan 0001 00:00:00 +0000https://en.bioecon.ru/docs/biochem-industrial/polymers-materials/bio-pet-products-pet-microbiome-bio-cat-litter/A litter box is an adsorption reactor audited daily by its household. Three competing mechanisms do its work — clay that swells, starch that glues, pellets that spring apart — and each hands back different chores.