Reusable Macroporous Oil Sorbent Films from Plastic Wastes

Area of Science:

• Materials Science
• Environmental Science
• Polymer Chemistry

Background:

• Plastic waste, particularly polyethylene (PE) and polypropylene (PP), constitutes a significant portion of municipal solid waste.
• The low-end applications and single-use nature of PE and PP contribute to their substantial environmental accumulation.
• Waste plastics represent a valuable, underutilized resource for creating advanced materials.

Purpose of the Study:

• To develop reusable oil sorbent films by upcycling waste PE and PP.
• To characterize the structure, properties, and performance of the novel oil sorbent films.
• To evaluate the efficiency of oil sorption and recovery from the upcycled materials.

Main Methods:

• Upcycling of waste polyethylene (PE) and polypropylene (PP) into sorbent films.
• Scanning Electron Microscopy (SEM) for structural analysis (macroporous structure, 1-10 µm pore size).
• Contact angle measurements to determine oleophilic nature.
• Differential Scanning Calorimetry (DSC) for thermal properties and crystallinity.
• Tensile testing for mechanical property evaluation.

Main Results:

• The developed oil sorbent films exhibited a high oil uptake capacity of 55 g/g.
• SEM confirmed a macroporous structure conducive to efficient oil sorption.
• Contact angle measurements indicated a strong oleophilic character.
• Thermal and mechanical properties were characterized, demonstrating material integrity.
• Over 95% of the sorbed oil was recoverable through simple mechanical squeezing.

Conclusions:

• Waste PE and PP can be effectively upcycled into high-performance, reusable oil sorbent films.
• The macroporous structure and oleophilic nature of the films are key to their excellent sorption capabilities.
• The developed sorbent offers a sustainable and efficient method for oil spill cleanup and oil recovery, addressing plastic waste challenges.