Strengthening of Porcine Plasma Protein Superabsorbent Materials through a Solubilization-Freeze-Drying Process

Area of Science:

• Materials Science
• Biotechnology
• Sustainable Chemistry

Background:

• Conventional superabsorbent materials rely on acrylic derivatives, posing environmental concerns.
• Utilizing food industry by-products, like plasma protein, supports a circular economy and reduces waste.
• Developing biodegradable alternatives is crucial for environmental sustainability.

Purpose of the Study:

• To develop novel biodegradable superabsorbent materials from meat industry plasma protein.
• To investigate the impact of a freeze-drying stage on material properties.
• To enhance mechanical properties of superabsorbent materials without compromising water uptake.

Main Methods:

• Superabsorbent materials were formulated using plasma protein, glycerol, and processed via injection molding.
• A freeze-drying step was applied either directly to protein flour or after solubilization in 10% w/w deionized water.
• Mechanical properties (Young's modulus, tensile strength) and water uptake capacity were evaluated.

Main Results:

• Superabsorbent materials processed via solubilization-freeze-drying exhibited significantly higher Young's modulus and tensile strength.
• The freeze-drying process did not negatively impact the water uptake capacity of the materials.
• This indicates a successful strategy for creating mechanically robust hydrophilic materials.

Conclusions:

• The solubilization-freeze-drying method is effective for producing strengthened biodegradable superabsorbent materials from plasma protein.
• This approach offers a sustainable alternative to conventional acrylic-based superabsorbents.
• The findings contribute to the development of eco-friendly materials and waste valorization in the food industry.