Cleaning wipes with electrospun germ-killing hydrogel nanofibers

Overview

This solution proposes a new class of antimicrobial cleaning wipes built from electrospun hydrogel nanofibers. The core idea is to graft short-chain chitosan polymers—bearing carboxylic and amine or ammonium functional groups—onto a suitable carrier polymer (most likely a cellulose derivative) to create soft, hydrophilic nanofibrous fabrics. These fabrics are designed to trap, remove, and kill microorganisms on contact, offering a potentially safer and more effective alternative to conventional disinfectant wipes for consumer and healthcare cleaning applications.

The technology addresses growing demand for advanced hygiene products that combine high antimicrobial performance with consumer safety and material sustainability. Chitosan is a well-known biopolymer with demonstrated bactericidal and antifungal activity, and its biological performance can be tuned by controlling molecular weight and the fraction of glucosamine units in the polymer chain.

Technical specifications

Key features:

• Electrospun nanofiber matrix providing high surface area for microbial capture
• Short-chain chitosan (target molecular weight 1–4 kDa) grafted onto a carboxylic polymer backbone, likely a cellulose derivative
• Amine, ammonium, and carboxylic functional groups enabling both germ trapping and germ killing
• Soft, hydrophilic, nonwoven fabric format suitable for wipe applications
• Tunable antimicrobial activity through control of chitosan molecular weight and glucosamine content
• Biopolymer-based composition supporting consumer-safe and environmentally friendlier end products

How it works:

The approach combines two well-established material strategies. First, chitosan chains are degraded to the 1–4 kDa range to optimize antimicrobial function. Second, these short chains are grafted onto a carboxylic-functional polymer carrier. The resulting material is electrospun into a conformal nanofibrous web. The amine/ammonium and carboxylic groups on the grafted chitosan interact with microbial cell walls and membranes, disrupting them and providing antibacterial and antifungal action, while the nanofiber morphology enhances physical trapping and removal of germs from surfaces.

Technology readiness level

The concept is at an early research stage (TRL 2–3). Published literature and existing patents support the feasibility of both modified chitosan antimicrobials and electrospun conformal wipes, and the research team has prior hands-on experience electrospinning chitosan nanofibers. The next validation steps include optimizing chitosan degradation and grafting methods, producing electrospun fabrics, and conducting structured antimicrobial testing in collaboration with a biochemical laboratory. Preliminary results are anticipated within approximately six months of project initiation.