The surface stability of polymers with adsorbed fibronectin

Area of Science:

• Polymer Science
• Surface Chemistry
• Biomaterials

Background:

• Understanding polymer surface modification is crucial for advanced material applications.
• Fibronectin, a key extracellular matrix protein, can alter polymer surface properties.
• Assessing the stability of protein-modified polymers is essential for their practical use.

Purpose of the Study:

• To investigate the effect of fibronectin adsorption on the wettability of various polymer films.
• To evaluate the stability of these protein-modified polymer surfaces under different conditions.
• To determine the influence of organic solvent extraction on protein-modified polymer stability.

Main Methods:

• Surface wettability was measured using advancing contact angles of water.
• Polymer films (LLDPE, PP, PS, PE-EAA) were treated with fibronectin solution.
• Stability was assessed after exposure to buffered aqueous solutions and ambient air.
• Soxhlet extraction was used to pre-treat some polymer samples.

Main Results:

• Fibronectin adsorption increased water wettability for LLDPE, PP, and PS films.
• Protein-modified surfaces showed good stability in buffered solutions but changed in air over 2 months.
• Pre-extraction of polymers had minimal effect on wettability changes after protein modification.
• Extraction slightly altered the thermal reconstruction rates for modified PS and PP films.

Conclusions:

• Fibronectin effectively modifies the surface wettability of common polymer films.
• The stability of protein-modified polymer surfaces is dependent on the polymer type and environmental exposure.
• Organic solvent extraction does not significantly alter the protein adsorption-induced wettability changes but can influence thermal reconstruction.