TCF POST Report
Termez, Uzbekistan — Chemical researchers at Termez State University have built a new antimicrobial coating for cotton fabric out of copper acetate, sulfosalicylic acid, thiourea and kaolin clay, and say early lab results give it a shot at competing with the silver- and zinc-based treatments that currently dominate the hygienic and medical textile trade. The work appears this week in the journal Textiles.
The team applied the mixture to plain woven cotton by soaking the cloth in a water-based suspension of the compound and then curing it with heat — a process close enough to standard textile finishing that mills would not need new equipment to run it. Once treated, the fabric stopped or slowed the growth of Staphylococcus aureus, E. coli, Pseudomonas aeruginosa and the fungus Candida albicans in disk-diffusion tests.
The business case: copper instead of silver
Silver nanoparticles have been the workhorse antimicrobial agent in textiles for years, prized for killing a wide range of microbes but expensive to produce and increasingly questioned by regulators over how much silver eventually washes into wastewater. Copper costs a fraction of silver on a per-kilogram basis and is easier to source, which is the main reason researchers keep returning to it as a substitute. If a copper-based finish like this one proves as effective in practice as it did on the bench, it gives mills — particularly ones in cotton-growing regions such as Central Asia trying to move beyond raw fiber exports — a cheaper route into the higher-margin market for functional, “protective” fabric.
What it does to the cloth itself
Any antimicrobial finish lives or dies commercially on what it does to the feel and performance of the fabric, not just its kill rate in a petri dish. Here the paper’s authors report a fairly clean bill of health. Tensile strength barely moved between treated and untreated samples in either the warp or weft direction. Stretch before breaking stayed close to the untreated fabric’s numbers, which matters for anything meant to move with the body rather than sit stiff. Resistance to surface wear actually rose, from about 14,600 rub cycles untreated to 16,500 after treatment. Color fastness held steady across both samples. And air permeability went up rather than down, a result the authors call important for garments — hospital scrubs, underwear, bedding — where trapped heat and moisture are exactly what a hygiene-focused buyer wants to avoid.
Taken together, those numbers suggest the finish could travel beyond hospital linens into ordinary retail categories built around odor control and freshness: socks, base layers, gym wear, towels, sheets.
Where the story is still open
This is bench science, not a finished product, and a few gaps stand between it and a factory floor. The authors did not test how the finish holds up after repeated washing, which they themselves flag as the next priority — wash durability is usually the single biggest reason antimicrobial textile treatments fail to make it to market. Skin safety for prolonged contact also needs its own testing: copper ions can irritate skin or trigger allergic reactions at high release rates, so anything meant to sit against skin for hours a day would need dermatological clearance on top of the microbiology. And the lab batches were built and tested on cloth swatches roughly the size of a dish towel; nobody yet knows what the chemistry costs, or how it behaves, at the scale of a working textile mill.
Bigger picture
The push away from silver in antimicrobial textiles has been building for a while, partly on cost grounds and partly because regulators in Europe and elsewhere have tightened rules on nanomaterial shedding from consumer goods. A durable, cheap, copper-based alternative that keeps a fabric’s strength, drape and breathability intact would matter to two different buyers at once: hospitals and care facilities looking for infection control on a budget, and apparel brands chasing hygiene claims without asking customers to trade away comfort. Whether this particular formula gets there depends entirely on the washing and safety data still to come.