Coaxial electrospinning uses a spinneret with two concentric nozzles to produce core-shell nanofibers — a distinct inner core inside an outer shell. Linari NanoTech supplies modular and sealed coaxial needle kits that integrate with our systems and with third-party setups, so you can encapsulate drugs, protect sensitive cores, and combine materials that cannot be spun on their own. Why core-shell fibers - Protect a sensitive core: The shell shields fragile payloads — proteins, growth factors, or drugs that degrade on contact with solvents, oxygen, or moisture. - Control and sustain release: A shell barrier slows and smooths the release of a drug held in the core, avoiding a sudden burst and extending it over time. - Spin the unspinnable: A spinnable shell can carry a core that could not form a fiber alone, including some liquids and non-spinnable actives. Frequently asked questions What equipment do I need for coaxial electrospinning? A coaxial spinneret with two concentric nozzles and two independent pumps, one for the core and one for the shell. Our coaxial needle kits add this capability to our systems and to compatible third-party setups. How do I confirm a core-shell structure? With imaging — transmission electron microscopy (TEM) is the standard, often combined with a dye or marker in one layer. Surface inspection alone is not enough.
Wire drum collector designed to produce very thin, easy-to-peel nanofiber mats. MINIMAL CONTACT POINTS FOR EASY FIBER RELEASE The wire construction minimizes the contact points between fibers and drum. With few contact points you can easily peel your nanofiber mats, even at very low thickness where a solid drum would make the delicate fibers stick and tear. Made of high-resistance hollow aluminum, weight and moment of inertia are reduced to the minimum, allowing high rotation speeds without triggering dangerous vibrations — so you also get aligned fibers along the wire direction. SPECIFICATIONS - Outer wire diameter: 80 mm - Grip diameter: 10 mm - Wire length: 120 mm - Wire diameter: 3 mm - Number of wires: 12 COMPATIBILITY Compatible with our Easy Drum rotary system. FREQUENTLY ASKED QUESTIONS When should I use a wire drum instead of a solid drum? Choose the wire drum when your nanofiber mat is very thin and delicate: the reduced contact area lets you peel it off intact. A solid aluminum drum is better for thicker mats and continuous surfaces. Does the wire drum align the fibers? Yes — at high rotation speed the fibers align along the wires, and the gaps between wires enhance alignment compared with a full surface.
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Easy Drum rotary collector with mounted collector for electrospinning
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The two solutions were fed through plastic tubing from separate syringe pumps into a coaxial needle (Linari Engineering, Pisa, Italy) at controlled flow rates - the core-shell configuration that allows one material to be enclosed within another during spinning.
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