Seed-semi batch emulsion synthesis of terpene-based latex for exterior wood protection
摘要
The demand for sustainable wood coatings has driven increasing interest in bio-based alternatives to traditional petroleum-derived latexes. Despite this, few studies have successfully developed bio-based solutions viable for industrial-scale production. Terpenes, with their renewable origin and functional properties, present a promising avenue for increasing the bio-based content of latexes. This study aimed to establish an industrially feasible emulsion polymerization protocol incorporating terpene (meth) acrylate monomers to produce high-performance bio-based coatings for exterior wood protection. Latexes were synthesized via semi batch emulsion polymerization using terpene-based monomers, including isobornyl methacrylate, isobornyl acrylate, tetrahydrogeraniol acrylate, and β-pinene acrylate. The resulting films were evaluated mechanically and for their application-specific performance as wood coatings. Key parameters included glass transition temperature (Tg), solids content, stress at 350% strain, and opacity. Films derived from terpene monomers demonstrated comparable results to petroleum-based latexes, with enhanced moisture resistance and satisfactory thermal stability. This study highlights the potential of terpene monomers as bio-based, high-performance components for wood coatings. Further optimization to enhance hardness could position these bio-based latexes as sustainable and industrially relevant alternatives for exterior wood protection.