journal article·2024-06-11

Chitin Nanofibers Enable the Colloidal Dispersion of Carbon Nanomaterials in Aqueous Phase and Hybrid Material Coassembly

Tianyu Guo, Zhangmin Wan, Mahyar Panahi-Sarmad, Gabriel Banvillet, Yi Lu, Shiva Zargar, Jing Tian, Feng Jiang, Yimin Mao, Qingshi Tu, Orlando J. Rojas

ACS Nano· Volume 18· Issue 23
Publisher page

Abstract

Chitin nanofibrils (ChNF) sourced from discarded marine biomass are shown as effective stabilizers of carbon nanomaterials in aqueous media. Such stabilization is evaluated for carbon nanotubes (CNT) considering spatial and temporal perspectives by using experimental (small-angle X-ray scattering, among others) and theoretical (atomistic simulation) approaches. We reveal that the coassembly of ChNF and CNT is governed by hydrophobic interactions, while electrostatic repulsion drives the colloidal stabilization of the hybrid ChNF/CNT system. Related effects are found to be transferable to multiwalled carbon nanotubes and graphene nanosheets. The observations explain the functionality of hybrid membranes obtained by aqueous phase processing, which benefit from an excellent areal mass distribution (correlated to piezoresistivity), also contributing to high electromechanical performance. The water resistance and flexibility of the ChNF/CNT membranes (along with its tensile strength at break of 190 MPa, conductivity of up to 426 S/cm, and piezoresistivity and light absorption properties) are conveniently combined in a device demonstration, a sunlight water evaporator. The latter is shown to present a high evaporation rate (as high as 1.425 kg water m –2 h –1 under one sun illumination) and recyclability.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Supramolecular Self-Assembly in Materials · Polydiacetylene-based materials and applications · Carbon Nanotubes in Composites

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada

Sustainable Functional Biomaterials Laboratory, Department of Wood Science, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada

Sustainable Bioeconomy Research Group, Department of Wood Science, The University of British Columbia, 2424 Main Mall, Vancouver, British Columbia V6T 1 Z4, Canada

Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States

NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States

Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada

Department of Wood Science, The University of British Columbia, 2900-2424 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada

Funding

Canada Foundation for Innovation · Canada Excellence Research Chairs, Government of Canada · Pacific Economic Development Canada

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