Strategies for enhancing mechanical performances of long-term zwitterionic biomedical implants

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Science

Background:

• Zwitterionic polymers possess superior antifouling characteristics due to strong hydration, ideal for biomedical implant interfaces.
• A key limitation is their insufficient mechanical strength, hindering long-term physiological performance.

Purpose of the Study:

• To review and analyze strategies for enhancing the mechanical properties of zwitterionic materials.
• To explore the application of mechanically robust zwitterionic materials in biomedical fields.
• To provide insights for developing next-generation zwitterionic biomedical implants.

Main Methods:

• Focus on strengthening intermolecular interactions through combined chemical and physical methods.
• Investigating chain structural design for improved mechanical integrity.
• Utilizing nanofiller reinforcement to enhance material performance.

Main Results:

• Discussed applications include interface coatings, zwitterionic hydrogels, and modified biomedical polymers.
• Explored the design of carboxybetaine (CB) ester hydrophobic analogues.
• Evaluated the trade-offs of different approaches for achieving durable, antifouling implants.

Conclusions:

• Mechanical enhancement strategies are crucial for realizing the full potential of zwitterionic polymers in biomedical applications.
• Standardized in vivo evaluations are needed to translate laboratory findings into clinical practice.
• Balancing mechanical robustness and biofunctionality is key for advanced zwitterionic implants.