Converting plastic waste pyrolysis ash into flash graphene

Wyss, Kevin M.; Beckham, Jacob L.; Chen, Weiyin; Luong, Duy Xuan; Hundi, Prabhas; Raghuraman, Shivaranjan; Shahsavari, Rouzbeh; Tour, James M.

doi:10.1016/j.carbon.2020.12.063

Title: Converting plastic waste pyrolysis ash into flash graphene

Journal Article · 23 December 2021 · Carbon

DOI: https://doi.org/10.1016/j.carbon.2020.12.063 · OSTI ID:1798505

Wyss, Kevin M. ^[1]; Beckham, Jacob L. ^[2];

^[2]; Luong, Duy Xuan ^[2]; Hundi, Prabhas ^[2]; Raghuraman, Shivaranjan ^[3]; Shahsavari, Rouzbeh ^[3];

^[2]

Rice Univ., Houston, TX (United States); Rice University
Rice Univ., Houston, TX (United States)
C-Crete Technologies, Stafford, TX (United States)

Pyrolysis of plastic waste (PW), a commercial method of recycling, is currently economically challenging and produces up to 20% by mass valueless pyrolysis ash (PA) as a byproduct. Here, direct, facile upcycling of PW-derived PA into high purity turbostratic flash graphene (tFG) is demonstrated. The tFG displays excellent dispersibility, yielding a concentration of 2.84 mg/mL in aqueous surfactant solution. The tFG was used to fabricate tFG-PVA nanocomposites, and low doses of tFG (0.1%–1%) improve failure strain by 15%–30% when compared to the samples of neat PVA. Furthermore, the addition of tFG to PVA films showed decreased hydrophilic interactions, increasing the water contact angle by 235% and adsorbing 500% less water than neat PVA. The tFG was also added to Portland cement paste as well as concrete, and exhibited 43% and 25% increases in compressive strength, respectively. The tFG is used directly in both composite applications, requiring no purification or chemical functionalization, unlike many other products used in nanocomposites.

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Research Organization:: Rice University, Houston, TX (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FE0031794

OSTI ID:: 1798505

Journal Information:: Carbon, Journal Name: Carbon Vol. 174; ISSN 0008-6223

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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54 ENVIRONMENTAL SCIENCES
composites
flash joule heating
graphene
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plastic waste
pyrolysis ash
recycling
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upcycling

Title: Converting plastic waste pyrolysis ash into flash graphene

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