Functionalized polyurethane foam composites for enhanced surface and oil cleaning

Overview

This solution addresses the persistent challenge of efficient oil and contaminant cleanup with a new class of functionalized polyurethane foam composites. Conventional polyurethane foams already offer internal void space capable of storing oil and water, but their cleaning efficiency and mechanical durability are limited. By combining polysiloxane modification with graphene oxide or lignin fillers, optional nanoparticle reinforcement, and long-chain alkyl surface functionalization, the resulting foams achieve superhydrophobicity, enhanced oil adsorption, and improved mechanical strength. The target applications include oil spill remediation, industrial surface cleaning, and environmental cleanup operations where durable, recyclable, and cost-effective absorbent materials are needed.

Technical specifications

• Polysiloxane-modified polyurethane base: Provides hydrophobicity, elasticity, and recyclability; siloxane chain length is tuned to control surface energy and absorption capacity.
• Composite reinforcement: Graphene oxide and lignin are incorporated through dopamine-assisted chemistry to leverage their oxygen-rich structures for swelling, intercalation, and mechanical strengthening.
• Nanoparticle enhancement: Metallic nanoparticles such as titanium dioxide can be added to further increase mechanical strength depending on application requirements.
• Surface functionalization: Long-chain alkyl groups including octadecyl amine or dodecyltrimethoxysilane decorate the foam surface to deliver superhydrophobicity and selective oil affinity.
• Key performance benefits: High absorption capacity, tunable hydrophobicity, improved mechanical durability, recyclability, and cost-effective production.

Technology readiness level

The research is at an early-to-mid development stage. Published literature supports the individual contributions of polysiloxane-based polyurethane strength, graphene oxide and titanium dioxide enhancements to oil cleanup capacity, and alkyl-chain-driven hydrophobicity. The proposed work will synthesize composite foams by systematically tuning siloxane ratios, filler loadings, and alkyl chain lengths, followed by controlled testing of surface cleaning and oil absorbability. Further validation and scale-up studies are needed before commercial deployment.