12:20 PM - SF02.17.10
3D Printed Schwarzites for Nanoplastics Water Remediation
Raphael Tromer1,Bramha Gupta2,Rushikesh Ambekar2,Partha Ghosal2,Rupal Sinha2,Abhradeep Majumder2,Partha Kumbhakar2,Pulickel Ajayan3,Douglas Galvao1,Ashok Gupta2,C Tiwary2
Universidade Estadual de Campinas1,Indian Institute of Technology Kharagpur2,Rice University3
Nanoplastics contamination has increasingly become one important environmental problem
because of their presence in rivers and oceans, toxicity and difficulty in separation and removal.
Here we report the development of a 3D printed water filter system , which is topologically
based on schwarzites, which can perform as an efficient nanoplastic scavenger. Schwarzites are
mathematical, 3D porous solids with periodic minimal surfaces having negative Gaussian
curvatures. The atomic-scale models obtained from molecular dynamics simulations are
converted into .stl format. This approach has been proved effective to other classes of 3D
printed materials [2-4]. The FlashForge Adventure 3 Printer (Fused Deposition Modeling) was
used to fabricate the water filters. The ABS (acrylonitrile butadiene styrene) filament used to
print the filter was melted in the extruder at 210 °C and extruded through a nozzle onto the
heated bed. The proposed filtration mechanism of surface-charge-based water cleaning was
further validated using ab initio and molecular dynamics simulations. The fabricated filters
proved to be effective in removing nanoplastics from samples from various sources, such as
sea, river, and pond. These new classes of 3D printed water filters represent a significant low-
cost, energy-efficient, and feasible advanced system to address the problem of nanoplastics
 B. Gupta, R. S. Ambekar, R. M. Tromer, P. S. Ghosal, R. Sinha, A. Majumder, P. Kumbhakar, P.
M. Ajayan, D. S. Galvao, A. K. Guptaf, C. S. Tiwary, RSC Advances 11, 19788 (2021).
 S. M. Sajadi, P. S. Owuor, S. Schara, C. F. Woellner, V. Rodrigues, R. Vajtai, J. Lou, D. S.
Galvão, C. S. Tiwary, and P. M. Ajayan, Adv. Mater. 30, 1704820 (2018).
 S. M. Sajadi, C. F. Woellner, P. Ramesh, S. L. Eichmann, Q. Sun, P. J. Boul, C. J. Thaemlitz, M.
M. Rahman, R. H. Baughman, D. S Galvao, C. S. Tiwary, and P. M. Ajayan, Small 15, 1904747
 R. S. Ambekar, E. F. Oliveira, B. Kushwaha, V. Pal, L. D. Machado, M. Sajadi, R. H. Baughman,
P. M. Ajayan, A. K. Roy, D. S. Galvao and C. S. Tiwary, Addit. Manuf. 101628 (2020).