Mechanochemically accelerated deconstruction of chemically recyclable plastics

Hua, Mutian; Peng, Zhengxing; Guha, Rishabh D.; Ruan, Xiaoxu; Ng, Ka Chon; Demarteau, Jeremy; Haber, Shira; Fricke, Sophia N.; Reimer, Jeffrey A.; Salmeron, Miquel B.; Persson, Kristin A.; Wang, Cheng; Helms, Brett A.

doi:10.1126/sciadv.adq3801

Mechanochemically accelerated deconstruction of chemically recyclable plastics

Journal Article · Fri Sep 20 00:00:00 EDT 2024 · Science Advances

DOI:https://doi.org/10.1126/sciadv.adq3801· OSTI ID:2476944

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Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
University of California, Berkeley, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Molecular Foundry
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)

Plastics redesign for circularity has primarily focused on monomer chemistries enabling faster deconstruction rates concomitant with high monomer yields. Yet, during deconstruction, polymer chains interact with their reaction medium, which remains underexplored in polymer reactivity. Here, we show that, when plastics are deconstructed in reaction media that promote swelling, initial rates are accelerated by over sixfold beyond those in small-molecule analogs. This unexpected acceleration is primarily tied to mechanochemical activation of strained polymer chains; however, changes in the activity of water under polymer confinement and bond activation in solvent-separated ion pairs are also important. Together, deconstruction times can be shortened by seven times by codesigning plastics and their deconstruction processes.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); National Science Foundation (NSF)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2476944

Journal Information:: Science Advances, Journal Name: Science Advances Journal Issue: 38 Vol. 10; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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