Microplastics (MPs) are a persistent environmental pollutant, composed of a variety of plastic types which have similar size, shape and chemical properties. Capture by polyacrylate-based adhesives (PAs) might be a useful innovation for remediation from the environment and the potential recycling of MPs, as PAs could selectively separate MPs based on plastic type. This work uses atomistic molecular dynamics simulations to quantify the work-of-adhesion between MPs and PAs as a guide to the design of materials that can effectively separate and purify MPs based on plastic type. The task of designing such materials, however, is complicated by the presence of surfactants and ions in the environment that could potentially interfere with adhesion. We will show that common surfactants found in laundry detergents, both ionic and non-ionic, can inhibit adhesion between PAs and MPs. The specific physical nature of the interactions will also be revealed through analysis of 2d Langmuir and 3d atomistic models. These interactions range in effect from strongly inhibitory of, to even enhancing of adhesion. This information can be used to predict overall adhesive ability in a wide variety of potential environments. Results of this work are being used in collaboration with the McNeil and Love groups at the University of Michigan, towards design of effective remediation and recycling techniques for MP waste.

How do ions and surfactants impact adhesion to microplastics?

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.