We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Novel and Accessible Physical Recycling for Expanded Polystyrene Waste with the Use of Acetone as a Solvent and Additive Manufacturing (Direct Ink-Write 3D Printing)
Summary
Researchers developed a low-cost method to recycle expanded polystyrene (EPS) waste by dissolving it in acetone and reforming it, offering an accessible alternative to conventional recycling. Keeping polystyrene out of landfills and the environment is relevant to microplastic reduction, since EPS readily breaks down into persistent polystyrene microparticles.
The current high production of plastics has prompted the exploration of alternative pathways to facilitate recycling, aiming for a progressively sustainable society. This paper presents an alternative and affordable technology for treating waste expanded polystyrene (EPS) mixed with acetone in a 100:1 volume ratio to be used as 3D printing ink for Direct Ink Write technology. In order to optimize the printing parameters, a comprehensive study was conducted, evaluating different needle diameters, printing speeds, and bed temperature values to achieve homogenous pieces and a highly repeatable 3D printing process. Results showed that the main optimum printing parameters were using needles with diameters of 14 to 16 G and printing speeds ranging from 2 to 12 mm/s, which were found to yield the most uniform ribbons. Increasing the bed temperature, despite favoring acetone evaporation, led to the generation of more heterogeneous structures due to void growth inside the printed ribbons. Thus, employing room temperature for the bed proved to be the optimal value. Lastly, a comparative study between the starting material and the EPS after the printing process was conducted using FTIR-ATR and GPC analyses, ensuring the preservation of the original polymer's integrity during physical recycling.
Sign in to start a discussion.
More Papers Like This
A mini-review on expanded polystyrene waste recycling and its applications
This mini-review summarizes recycling technologies and emerging applications for expanded polystyrene waste, examining mechanical, chemical, and dissolution recycling methods and their practical feasibility for diverting EPS from landfill in both developed and developing countries.
Iced block method: An efficient method for preparation of micro-sized expanded polystyrene foams
Researchers developed a new method for producing micro-sized expanded polystyrene (EPS) foam particles in the lab, enabling better-controlled experiments on EPS microplastic toxicity and environmental behavior. EPS foam is widely found in the environment but has been understudied compared to other microplastic types.
Expanded beads of polyethylene moldable at low steam pressure
Researchers developed an expanded polyethylene bead foam that can be molded at very low steam pressures, making it cheaper and more flexible to manufacture than conventional expanded polystyrene (Styrofoam). Unlike polystyrene, polyethylene foam is more readily recyclable and the study explicitly notes this approach avoids contributing to microplastic pollution. This represents a step toward replacing one of the most environmentally persistent foam plastics with a more manageable alternative.
Upcycling Polystyrene
This review surveys promising approaches for upcycling polystyrene waste, covering both mechanical and thermochemical recycling routes developed over the past five years. Researchers found that no single technology is fully effective on its own, but hybrid approaches combining multiple methods show the highest potential for creating a circular economy for polystyrene. The study also explores connections to emerging technologies including 3D printing, vertical farming, and green hydrogen production.
EPS waste management from coastal cleaning actions: identification of contamination sources, collection, treatment, and re-use in cement-based materials
This study developed an integrated approach for managing expanded polystyrene (EPS) waste from coastal cleanup activities, including collection, treatment, and incorporation into cement-based building materials. Reusing EPS waste from beaches reduces the amount of plastic that breaks down into microplastics in marine environments.