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Project title

Investigation and mitigation of surface stress-induced microplastics release from daily-use plastic products

Primary Funding Agency

Environmental Protection Agency (EPA)

Co-Funding Organisation(s)

n/a

Lead Organisation

Taighde Eireann Research Ireland (TCD)

Lead Applicant

Dunzhu Li

Project Abstract

Microplastics (MPs) are a global concern due to their potential threat to the environment and human health. Recent studies confirmed that daily-use plastic products (DPPs, e.g., plastic bottles and syringes) are local and immediate sources of high-level MPs, which raises huge public concern. To date, little is known about the MPs release mechanism. Typical DPPs are semi-crystalline (crystallinity ranging 10-80%) containing amorphous and crystalline regions. We recently confirmed that the phase separation of amorphous regions in bulk plastics is largely responsible for MP release (contribution >95%) while surface stress is a fundamental driver. To protect both human and environmental health, I propose to (i) systematically investigate surface stress-induced polymer phase separation and MP release from DPPs, (ii) undertake numerical studies of surface stress and polymer phase separation and modification of DPP design and related processing conditions, (iii) design and develop prototype of typical DPPs (plastic bottles and syringes) using moulding method to lower the surface stress and suppress microplastics release, and (iv) communicate the outputs and impacts of the Pathway Project through journal publications and media reports, engagement with MP research community and regulators and to disseminate results to the widest possible local audience via participation in Bloom Festival 2027.

Grant Approved

€337,442.70

Research Hub

Delivering a Healthy Environment

Research Theme

n/a

Start Date

11/07/2025

Initial Projected Completion Date

11/07/2029