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Characterization and Performance Enhancement of Bio-Based Polyurethane-Modified Cement Mortar Utilizing Polyglycerol
Renzo Miguel R Hisona1,2, Christine Joy M Omisol1, Tomas Ralph B Tomon1
1Center for Sustainable Polymers, Mindanao State University - Iligan Institute of Technology, Iligan City 9200, Philippines.
ACS Omega
|November 25, 2024
Summary
This study enhanced cementitious mortar performance using bio-based polyurethane (PU) additives. Optimal 2% PU addition significantly boosted strength and flow, offering a sustainable solution for construction materials.
Area of Science:
- Materials Science
- Sustainable Construction
- Polymer Chemistry
Background:
- Growing demand for sustainable building materials necessitates eco-friendly additives for traditional composites.
- Bio-based additives offer a promising route to enhance cementitious materials' functionality and environmental profile.
Purpose of the Study:
- To develop a novel polymer-modified cementitious mortar (PUMC) using bio-based polyurethane (PU).
- To evaluate the impact of varying PU content on the mechanical, physicochemical, and microstructural properties of cementitious mortar.
- To explore the potential of PUMC for industrial flooring applications.
Main Methods:
- Incorporation of 0-6% bio-based PU into cementitious mortar.
- Evaluation of mechanical properties (compressive and flexural strength, abrasion resistance).
- Physicochemical and microstructural analysis using BET-BJH, SEM-EDX, FTIR, and TGA.
Main Results:
- 2% PU addition significantly improved compressive strength (58.2%) and flexural strength (37.0%).
- Enhanced initial flow performance (20.0%) observed with 2% PU incorporation.
- 6% PU addition yielded the best abrasion resistance.
- Improved properties attributed to uniform particle/pore distribution and interpenetrating polymer network (IPN) formation.
- FTIR and TGA confirmed metal-ligand coordination strengthening interfacial connectivity via noncovalent bonding.
Conclusions:
- Bio-based PU is an effective eco-friendly additive for cementitious mortars.
- PUMC exhibits significantly enhanced mechanical performance and durability.
- The developed material shows strong potential for sustainable industrial flooring solutions.
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