Banana Fiber Reinforced Fibrin Clots

ISEF Category: Materials Science

Subcategory: Biomaterials  ·  Difficulty: Advanced  ·  Setup: University Lab  ·  Time: Full Year

The Hook

A blood clot has one job, stop a leak fast. If it fails, a surgeon can lose precious time. That makes clot strength a real engineering problem, not just a biology one. Your project asks whether banana waste fibers can help build a stronger clot model.

What Is It?

Fibrin is the sticky protein mesh that helps blood clot. Think of it like a net made from tiny threads. In this project, you study whether cellulose nanofibers from banana pseudostems can reinforce that net and help it recover after stretching.

That matters because surgeons often want materials that stop bleeding fast and hold together under stress. A hemostatic scaffold is a support material that helps clotting happen. You are not trying to replace blood. You are testing whether a plant-based fiber can change the mechanical behavior of a clot model in a measurable way.

Cellulose nanofibers are very small plant fibers. They can act like rebar inside concrete. If they interact well with the fibrin network, they may improve tensile recovery, which means the material springs back better after being pulled.

Why This Is a Good Topic

This is a strong science fair topic because you can change one material variable, measure a clear mechanical response, and compare results across groups. The project connects to wound care, surgery, and low-cost biomaterials. You can learn materials prep, experimental controls, tensile testing, and data analysis without needing to invent a new lab method from scratch.

Research Questions

• How does banana-pseudostem cellulose nanofiber loading affect the tensile recovery of fibrin clot models?
• What is the effect of fiber length on the peak tensile strength of fibrin-based scaffolds?
• Does the ratio of cellulose nanofibers to fibrin change how much deformation the clot model can recover from?
• To what extent does banana-derived cellulose improve elastic behavior compared with a no-fiber control?
• Which preparation method gives the most uniform fiber dispersion in a fibrin matrix?
• How does moisture content affect the measured strength of fibrin and banana-fiber composites?

Basic Materials

• Banana pseudostem fiber source or pre-isolated cellulose nanofiber sample.
• Fibrinogen or a safe fibrin-like gelatin-based substitute, depending on lab access.
• Calcium chloride or another clotting trigger used in the chosen model.
• Digital kitchen scale with 0.1 g accuracy.
• Graduated cylinders and disposable transfer pipettes.
• Beakers, mixing cups, and stirring rods.
• Flat molds or small casting trays for making repeatable samples.
• Ruler or digital caliper.
• Spring scale, force gauge, or school tensile tester.
• Smartphone camera with fixed tripod or stand.
• Nitrile gloves, lab coat, and eye protection.

Advanced Materials

• Purified banana-pseudostem cellulose nanofibers.
• Human fibrinogen and thrombin, if approved by the supervising lab.
• UV-Vis spectrophotometer for sample quality checks.
• Universal testing machine with a low-force load cell.
• Texture analyzer for small soft samples.
• Scanning electron microscope for fiber dispersion imaging.
• Freeze dryer or controlled drying setup.
• Analytical balance.
• Phosphate-buffered saline and standard biomaterials lab consumables.
• ImageJ for fracture and deformation image analysis.

Software & Tools

• Google Sheets: Organizes tensile data, calculates averages, and makes comparison charts.
• ImageJ: Measures sample width change, deformation, and visible fracture patterns from photos.
• R: Runs statistics, plots distributions, and compares treatment groups.
• Python: Automates data cleanup and repeatable analysis for larger sample sets.
• PubMed: Helps you find review articles and primary papers on fibrin, cellulose, and hemostatic scaffolds.

Experiment Steps

1. Define the exact material comparison you want to test, such as different fiber loadings, fiber lengths, or a control versus reinforced scaffold.
2. Choose a clot model that you can prepare the same way every time, and decide how you will keep sample shape and size consistent.
3. Plan a measurement method for tensile recovery, then pick one signal you will track, such as stretch, force, or percent recovery.
4. Build a control set that can rule out water content, mixing quality, and sample thickness as hidden causes of strength changes.
5. Design a data table and a repeat count before you start, so you know how you will compare groups and handle outliers.
6. Decide how you will present the final result as both a material comparison and a biological design question tied to hemostatic scaffolds.

Common Pitfalls

• Using banana fibers that are not cleaned or sized consistently, which makes the material behave differently from sample to sample.
• Letting the fibrin or gel samples dry at different rates, which changes stiffness more than the fiber treatment does.
• Mixing fibers poorly, which creates clumps that act like defects instead of reinforcement.
• Comparing samples with different thicknesses or shapes, which makes tensile data impossible to compare fairly.
• Treating a force reading as proof of better clotting without checking recovery, fracture pattern, or a matched control.

What Makes This Competitive

A competitive version of this project does more than compare one fiber mix against another. It uses tight controls, repeatable geometry, and a clear mechanical metric that tells a real story about scaffold performance. Strong projects also test more than one variable, such as fiber length and loading, or compare banana cellulose with another plant fiber. If you add careful statistics and a good explanation of why the trend matters for hemostatic design, the work becomes much stronger.

Project Variations

• Compare banana-pseudostem fibers with coconut coir or paper pulp to see whether fiber source changes clot reinforcement.
• Test whether surface-treated banana fibers bond better with the fibrin matrix than untreated fibers.
• Analyze fracture recovery with phone video tracking instead of only peak force measurements.

Learn More

• PubMed: Search for review articles on fibrin scaffolds, cellulose nanofibers, and hemostatic biomaterials.
• NIH NCBI Bookshelf: Find free background chapters on biomaterials, wound healing, and extracellular matrix mechanics.
• MIT OpenCourseWare: Look for materials science and biomaterials lecture notes that explain polymer networks and mechanical testing.
• NIST: Search for free resources on measurement uncertainty, calibration, and data quality.
• Biomaterials: Read recent peer-reviewed papers on scaffold mechanics and hemostatic materials through your school library or abstract search.
• NASA Technical Reports Server: Search for materials testing and fiber composite methods that can inspire careful experimental design.