Polyelectrolyte Multilayer Films Based on Natural Polymers: From Fundamentals to Bio-Applications

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Nanotechnology

Background:

• Natural polymers offer biodegradability, biocompatibility, and non-toxicity, making them valuable for biomedical applications.
• Layer-by-layer (LbL) assembly is a versatile bottom-up technique for creating nanostructured materials with controlled thickness and composition.
• LbL offers advantages over traditional coating methods, including suitability for complex surfaces and precise nanoscale control.

Purpose of the Study:

• To review advances in multilayer assembly of natural polymers using LbL techniques.
• To discuss the influence of variables like pH, molar mass, and preparation method on LbL assembly.
• To explore the applications of resulting multilayer biopolymer films in tissue engineering, drug delivery, and thermal therapies.

Main Methods:

• Review of literature on layer-by-layer (LbL) assembly of natural polymers.
• Focus on common LbL techniques: dipping, spray coating, and spin coating.
• Analysis of factors influencing LbL assembly, including pH, molar mass, and preparation method.

Main Results:

• LbL assembly enables controlled fabrication of nanostructured multilayer natural polymer films.
• Variables such as pH, molar mass, and preparation method significantly impact the LbL assembly process.
• Multilayer biopolymer films demonstrate potential for advanced applications in biomedicine.

Conclusions:

• Layer-by-layer assembly is a powerful technique for developing advanced natural polymer nanostructures.
• Understanding process variables is crucial for optimizing multilayer film properties.
• These biopolymer films hold significant promise for future biomedical innovations.