Dual-functional anti-adhesion barrier prepared using micro-hierarchical structured and neutralized shellac films for...

Area of Science:

• Biomaterials Science
• Surface Engineering
• Polymer Chemistry

Background:

• Shellac, a natural resin, offers biodegradability and biocompatibility.
• Developing advanced materials for medical implants requires surfaces that minimize adverse biological interactions.
• Superhydrophobic surfaces can exhibit unique anti-fouling properties.

Purpose of the Study:

• To engineer micro-hierarchical structured shellac films with superhydrophobic properties.
• To evaluate the anti-adhesion capabilities of these films for medical applications.
• To assess the durability and biocompatibility of the novel shellac films.

Main Methods:

• Solution casting method utilizing immobilized shellac microparticles.
• Preparation of films with varying shellac and calcium phosphate compositions.
• Spray deposition of functionalized shellac microparticles onto film surfaces.
• Evaluation of mechanical properties (bending strength, surface hardness).
• Surface characterization using contact angle measurements.
• Assessment of cell and platelet adhesion using WST assay, SEM, and hemocytometry.

Main Results:

• Optimal film durability achieved with 15% shellac and 10% calcium phosphate.
• Micro-hierarchical structured surface exhibited a superhydrophobic contact angle of ~150°.
• Spray-deposited films showed a significant reduction in cell and platelet adhesion (20% lower than untreated films).
• Increased shellac solubility observed with higher pH levels.

Conclusions:

• The developed micro-hierarchical structured shellac film possesses unique superhydrophobic properties.
• This biodegradable material demonstrates excellent anti-adhesion characteristics, reducing cell and platelet attachment.
• The novel shellac film is a promising candidate for blood/tissue-compatible, biodegradable materials in implantable medical devices requiring an anti-adhesion barrier.