Chitin & Chitosan Nanomaterials

Take the chitin you already know and slice its cross-section a hundredfold. A white, inert-looking powder becomes a colloidal suspension that stays stable for months. What was opaque turns faintly blue and optically clear. One gram of polymer unfolds into tens of square metres of accessible surface, and suddenly the chemistry that mattered in bulk — charge, hydrogen bonding, crystallinity — is happening almost entirely at the interface. This is why nanomaterials are not a marketing suffix for us. They are a different product governed by different physics, and they deserve specifications written in nanometres rather than mesh sizes.

Eata Marisource supplies the full nanoscale ladder built on traceable marine crustacean shell: individualised chitin nanofibrils separated from the native fibre bundle, acid-hydrolysed chitin nanocrystals, chitosan nanoparticles assembled by ionic gelation, and electrospun chitosan nanofibre mats. Whichever format you source, the measurements that define it — diameter, length, polydispersity, zeta potential, degree of acetylation, suspension solids — arrive on the certificate with the drum.

Individualised chitin nanofibrils under the electron microscope — the entangled network that gives nanocomposite films their strength.

Why the Size Change Changes Everything

Native chitin is already a nanomaterial in disguise. Inside a crab shell, fibres run 2–5 nm across and roughly 300 nm long, bundled into the hierarchy that makes the material both light and tough. Pull those fibrils apart and each property that depended on the bundle now depends on the single fibre:

• Aspect ratio — native fibrils carry aspect ratios above 100, so a small mass builds long load-bearing networks in films, gels and composites
• Surface area — surface-to-volume ratios climb by orders of magnitude, which multiplies adsorption sites, reinforcement contacts and reaction surfaces per gram
• Optics — well-dispersed suspensions scatter so little light that thick films look glass-clear — a property bulk chitin powder can never offer
• Charge density — surface amines and carboxylates dominate colloidal behaviour, so zeta potential becomes the number that predicts whether your dispersion lives or flocculates
• Rheology — even at low solids, fibril entanglement builds yield stress and shear-thinning flow that stabilises emulsions and suspensions

Four Formats, One Specification Sheet

We keep the catalogue short and the data long. These are the formats research and industrial customers order most, together with the windows we routinely hit:

Probe sonication under cooling: once chemical swelling has loosened the bundle, mechanical energy finishes the separation.

The Top-Down Route, Told Plainly

Individualised nanofibrils do not come from a reaction flask; they come from work. Demineralised, deproteinised chitin is first swelled so water can creep between the fibrils, then broken down mechanically — probe sonication, wet grinding or high-pressure homogenisation, chosen to match the dimension window you need. Push harder and the fibrils shorten and narrow; ease off and you keep more of the native length. That dial is yours to set.

Where colloidal stability matters more than a pristine native surface, we offer TEMPO-mediated oxidation, which plants carboxylate groups along the fibril and lets the suspension repel itself into stability. The trade-off is honest and worth knowing before you order: oxidation consumes some of the surface amines and acetyl groups that make chitin interesting elsewhere. Tell us which surface your application needs and we will tell you which route suits it.

High-pressure homogenisation — the workhorse behind consistent fibril diameters at pilot scale.

Chitosan Nanoparticles: Small Spheres, Tuned from the Outside

The bottom-up route inverts the logic. Instead of cutting a big fibre down, we let nanoparticles assemble themselves. Chitosan dissolved in dilute acid meets sodium tripolyphosphate, opposite charges meet, and spherical particles precipitate out of solution in seconds. Nothing exotic is required — the polymer's own polycationic backbone does the assembly work.

What is controllable is everything around the assembly. The chitosan grade, its deacetylation degree, the solution pH, the TPP-to-polymer ratio, the mixing energy and the addition rate all push the outcome. Depending on those settings the mean diameter lands anywhere from about 90 nm to 400 nm, with zeta potentials typically between +20 and +50 mV and polydispersity indices near 0.2 under controlled mixing. Every batch is reported by dynamic light scattering at fixed conditions, so the size on the certificate is the size in your vial — not an average of averages.

Chitosan–TPP nanoparticle dispersions, from faintly opalescent to fully turbid as solids content rises.

What We Measure Before Anything Ships

Nanomaterials punish vague documentation, so our release panel reads like an instrument schedule rather than a sales sheet:

• Dimension — mean hydrodynamic diameter and polydispersity index by DLS, always quoted with the measurement conditions
• Colloidal stability — zeta potential across the pH points relevant to your process
• Morphology — representative SEM or AFM micrographs retained for every lot
• Chemistry — degree of acetylation by FTIR, plus residual ash and protein on the parent polymer
• Handling — total solids, suspension pH, and viscosity of the feed solution where relevant
• Format — storage form at dispatch — never-dried gel, spray-dried or lyophilised — since redispersion behaviour differs between them

Nanofibre membrane discs: electrospun nonwovens ready for filtration and scaffold work, supplied on support liner.

Where These Materials Earn Their Keep

Customers rarely buy a nanofibre for its own sake. They buy it to solve something specific. Across our order book, the recurring jobs look like this:

• Films and coatings — mechanical reinforcement and barrier improvement of starch, alginate, gelatin and biodegradable packaging films at low loading levels
• Separation — nanofibre mats for fine-particle filtration and functional membranes, where fibre diameter sets the capture curve
• Agriculture research — seed coatings and foliar research formulations, where chitin's natural elicitor role meets nanoscale coverage
• Personal care research — emulsion stabilisation and skin-friendly film formers for personal care research, using the cationic surface to anchor active molecules
• Advanced research systems — encapsulation studies, hydrogel and aerogel platforms, and sensing substrates built on chitin nanofibre paper

Lyophilised chitosan nanoparticles rehydrate to their original colloid in seconds — logistics gain, no sacrifice in dispersion quality.

Built to Your Specification, Not Ours

Because every format above starts from parameters rather than a fixed recipe, custom work is the normal case here rather than the exception. Practical starting points we routinely adjust:

• parent polymer selection — deacetylation degree and molecular weight of the chitosan, or allomorph and source of the chitin feedstock
• dimension windows — target fibril diameter and length, or particle size band, verified batch by batch
• surface chemistry — TEMPO oxidation level, carboxymethylation, quaternisation or coupling of functional groups onto the nanosurface
• dispatch format — aqueous suspension at your solids target, spray-dried powder, or lyophilised solid with redispersion instructions
• scale — research quantities for method development through to pilot volumes with consistent process records

If your project lives between two catalogue entries — say, oxidised nanofibrils at 4% solids in a specific buffer, or 250 nm nanoparticles at a defined zeta window — that conversation starts with our technical team, not a shopping cart.

Contact us with the dimensions your work depends on, and we will match the format, the surface and the certificate to it.

For Research or Industrial Raw Materials, Not For Personal Medical Use!