-Alkylated Chitin Nanocrystals As a Collector in Malachite Flotation

Overview

Journal ACS Sustain Chem Eng

Publisher American Chemical Society

Date 2022 Aug 22

PMID 35991757

Authors

Robert Hartmann

Marco Beaumont

Eva Pasquie

Thomas Rosenau

Rodrigo Serna-Guerrero

Affiliations

Soon will be listed here.

Abstract

The majority of reagents currently used in mineral flotation processes are fossil-based and potentially harmful to the environment. Therefore, it is necessary to find environmentally-friendly alternatives to reduce the impact of mineral processing activities. Chitin nanocrystals are a renewable resource that, due to the natural presence of amino groups on its surface, represents a promising collector for various minerals of economic relevance. This study examines the one-pot functionalization of chitin nanocrystals with aldehyde structures to obtain hydrophobized colloids suitable for mineral flotation. The chemical properties of these nano-colloids were investigated by nuclear magnetic resonance spectroscopy, their colloidal behavior and structure by electrophoretic light scattering and atomic force microscopy, and their wettability through water contact angle measurements. The functionalized -alkylated chitin nanocrystals possessed a hydrophobic character, were able to dress mineral particles and featured a performance in the flotation of malachite similar to commercial collectors, which proves the high potential of chitin nanocrystals in this field of application.

References

Facchinatto W, Dos Santos D, Fiamingo A, Bernardes-Filho R, Campana-Filho S, de Azevedo E . Evaluation of chitosan crystallinity: A high-resolution solid-state NMR spectroscopy approach. Carbohydr Polym. 2020; 250:116891. DOI: 10.1016/j.carbpol.2020.116891. View

Yang S, Pelton R, Raegen A, Montgomery M, Dalnoki-Veress K . Nanoparticle flotation collectors: mechanisms behind a new technology. Langmuir. 2011; 27(17):10438-46. DOI: 10.1021/la2016534. View

Ling S, Kaplan D, Buehler M . Nanofibrils in nature and materials engineering. Nat Rev Mater. 2021; 3(4). PMC: 8221570. DOI: 10.1038/natrevmats.2018.16. View

Duan B, Gao H, He M, Zhang L . Hydrophobic modification on surface of chitin sponges for highly effective separation of oil. ACS Appl Mater Interfaces. 2014; 6(22):19933-42. DOI: 10.1021/am505414y. View

Bai L, Huan S, Xiang W, Liu L, Yang Y, Nugroho R . Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization. ACS Sustain Chem Eng. 2019; 7(7):6497-6511. PMC: 6448262. DOI: 10.1021/acssuschemeng.8b04023. View

Bai L, Kamarainen T, Xiang W, Majoinen J, Seitsonen J, Grande R . Chirality from Cryo-Electron Tomograms of Nanocrystals Obtained by Lateral Disassembly and Surface Etching of Never-Dried Chitin. ACS Nano. 2020; 14(6):6921-6930. DOI: 10.1021/acsnano.0c01327. View

Bombarda E, Ullmann G . pH-dependent pKa values in proteins--a theoretical analysis of protonation energies with practical consequences for enzymatic reactions. J Phys Chem B. 2010; 114(5):1994-2003. DOI: 10.1021/jp908926w. View

Wu D, Ma W, Mao Y, Deng J, Wen S . Enhanced sulfidation xanthate flotation of malachite using ammonium ions as activator. Sci Rep. 2017; 7(1):2086. PMC: 5437049. DOI: 10.1038/s41598-017-02136-x. View

Liu H, Feng Y, Cao X, Luo B, Liu M . Chitin Nanocrystals as an Eco-friendly and Strong Anisotropic Adhesive. ACS Appl Mater Interfaces. 2021; 13(9):11356-11368. DOI: 10.1021/acsami.1c02000. View

10.

Hartmann R, Rinne T, Serna-Guerrero R . On the Colloidal Behavior of Cellulose Nanocrystals as a Hydrophobization Reagent for Mineral Particles. Langmuir. 2021; 37(7):2322-2333. PMC: 8023700. DOI: 10.1021/acs.langmuir.0c03131. View

11.

Yang S, Pelton R, Montgomery M, Cui Y . Nanoparticle flotation collectors III: the role of nanoparticle diameter. ACS Appl Mater Interfaces. 2012; 4(9):4882-90. DOI: 10.1021/am301215h. View

12.

Visanko M, Liimatainen H, Sirvio J, Heiskanen J, Niinimaki J, Hormi O . Amphiphilic cellulose nanocrystals from acid-free oxidative treatment: physicochemical characteristics and use as an oil-water stabilizer. Biomacromolecules. 2014; 15(7):2769-75. DOI: 10.1021/bm500628g. View

13.

Li L, Yang L, Li F . Synthesis of 1-(2-Hydroxyphenyl) Dec-2-en-1-One Oxime and Its Flotation and Adsorption Behavior for Malachite. Front Chem. 2020; 8:592771. PMC: 7726417. DOI: 10.3389/fchem.2020.592771. View

14.

Dong X, Price M, Dai Z, Xu M, Pelton R . Mineral-mineral particle collisions during flotation remove adsorbed nanoparticle flotation collectors. J Colloid Interface Sci. 2017; 504:178-185. DOI: 10.1016/j.jcis.2017.05.050. View

15.

Narkevicius A, Steiner L, Parker R, Ogawa Y, Frka-Petesic B, Vignolini S . Controlling the Self-Assembly Behavior of Aqueous Chitin Nanocrystal Suspensions. Biomacromolecules. 2019; 20(7):2830-2838. DOI: 10.1021/acs.biomac.9b00589. View

16.

Larbi F, Garcia A, Del Valle L, Hamou A, Puiggali J, Belgacem N . Comparison of nanocrystals and nanofibers produced from shrimp shell α-chitin: From energy production to material cytotoxicity and Pickering emulsion properties. Carbohydr Polym. 2018; 196:385-397. DOI: 10.1016/j.carbpol.2018.04.094. View

17.

Tardy B, Mattos B, Otoni C, Beaumont M, Majoinen J, Kamarainen T . Deconstruction and Reassembly of Renewable Polymers and Biocolloids into Next Generation Structured Materials. Chem Rev. 2021; 121(22):14088-14188. PMC: 8630709. DOI: 10.1021/acs.chemrev.0c01333. View

18.

Huan S, Zhu Y, Xu W, McClements D, Bai L, Rojas O . Pickering Emulsions Interfacial Nanoparticle Complexation of Oppositely Charged Nanopolysaccharides. ACS Appl Mater Interfaces. 2021; 13(10):12581-12593. DOI: 10.1021/acsami.0c22560. View

19.

Zhu Y, Huan S, Bai L, Ketola A, Shi X, Zhang X . High Internal Phase Oil-in-Water Pickering Emulsions Stabilized by Chitin Nanofibrils: 3D Structuring and Solid Foam . ACS Appl Mater Interfaces. 2020; 12(9):11240-11251. PMC: 7735654. DOI: 10.1021/acsami.9b23430. View

20.

Wang Z, Xu J, Li M, Su C, Wu X, Zhang Y . Separation of Caustic Nano-Emulsions and Macromolecular Conformations with Nanofibrous Membranes of Marine Chitin. ACS Appl Mater Interfaces. 2019; 11(8):8576-8583. DOI: 10.1021/acsami.8b21847. View