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Synthesis of Soft Polysiloxane-urea Elastomers for Intraocular Lens Application
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Multifunctional polysulfone/strontium silicate composites with tunable properties through silane functionalization.

Yun-Ru Huang1, Shinn-Jyh Ding1,2

  • 1Institute of Oral Science, Chung Shan Medical University, Taichung City 402, Taiwan. sjding@csmu.edu.tw.

Journal of Materials Chemistry. B
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Summary

This study developed advanced bone implants using recycled polysulfone (PSF) and strontium silicate (SrSi). Composites modified with (3-aminopropyl)triethoxysilane (APE) showed superior mechanical strength and osteogenic properties for load-bearing applications.

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Area of Science:

  • Biomaterials Engineering
  • Polymer Science
  • Biomedical Materials

Background:

  • Osteogenic polymer-based bone implants are crucial for load-bearing applications.
  • Upcycling polysulfone (PSF) waste offers environmental sustainability.
  • Developing functional bone implants requires robust matrix-filler interactions.

Purpose of the Study:

  • To create novel bone implant composites from recycled polysulfone (PSF) and strontium silicate (SrSi).
  • To enhance the bonding between SrSi filler and PSF matrix using silane coupling agents.
  • To evaluate the mechanical, degradation, and biological performance of the developed composites.

Main Methods:

  • PSF derived from medical waste was used as the matrix, with SrSi as the filler.
  • Four silanes, including (3-aminopropyl)triethoxysilane (APE), were used to functionalize SrSi.
  • Mechanical testing, in vitro degradation studies, and cell culture assays (hMSCs, RAW 264.7) were performed.

Main Results:

  • Composites modified with 5% APE exhibited a 42% increase in compressive strength and 21% in bending strength.
  • The 5% APE-modified composite retained significant strength after 12 months of degradation.
  • SrSi enhanced antibacterial activity and promoted hMSC osteogenic differentiation.

Conclusions:

  • The 5% APE-modified PSF/SrSi composites demonstrate promising mechanical and biological properties.
  • These composites show potential for use in load-bearing bone implant applications.
  • Recycled PSF and SrSi offer a sustainable route for developing advanced bone biomaterials.