Recyclable Polycarbosilane from a Biomass-Derived Bifuran-Based Monomer

Area of Science:

• Polymer Chemistry
• Materials Science
• Organic Synthesis

Background:

• Next-generation polymers require sustainable sourcing from renewable biomass and efficient recyclability.
• Bifuran derivatives offer rigidity, strong interchain interactions, and extended π-conjugation for functional polymers.

Purpose of the Study:

• To synthesize and characterize a novel polycarbosilane incorporating a bifuran-based repeat unit.
• To evaluate the thermal, optical, and recycling properties of the bifuran-containing polycarbosilane.

Main Methods:

• Hydrosilylation reaction between dihydrosilylbifuran and 1,5-hexadiene to prepare the polycarbosilane.
• Analysis of crystallinity, thermal properties, UV-Vis absorption, and fluorescence spectroscopy.
• Investigation of chemical recyclability using trifluoroacetic acid treatment.

Main Results:

• The bifuran-containing polycarbosilane demonstrated superior crystallinity and thermal stability compared to single-furan and benzene analogues.
• The bifuran moiety induced a red-shift in UV absorption and strong fluorescence, attributed to extended σ-π conjugation.
• The polymer exhibited unique chemical recyclability, regenerating the bifuran monomer and up-cycling silane byproducts.

Conclusions:

• The bifuran motif significantly enhances the thermal, optical (UV absorption and fluorescence), and chemical recycling properties of polycarbosilanes.
• This bifuran-based polycarbosilane represents a promising sustainable material with advanced functionalities.
• The study highlights the potential of bifuran derivatives in developing high-performance, recyclable polymers.