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Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization

[Image: see text] Highly charged (zeta potential ζ = +105 mV, acetate counterions) chitin nanoparticles (NCh) of three different average aspect ratios (∼5, 25, and >60) were obtained by low-energy deconstruction of partially deacetylated chitin. The nanoparticles were effective in reducing the in...

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Autores principales: Bai, Long, Huan, Siqi, Xiang, Wenchao, Liu, Liang, Yang, Yang, Nugroho, Robertus Wahyu N., Fan, Yimin, Rojas, Orlando J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6448262/
https://www.ncbi.nlm.nih.gov/pubmed/30956906
http://dx.doi.org/10.1021/acssuschemeng.8b04023
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author Bai, Long
Huan, Siqi
Xiang, Wenchao
Liu, Liang
Yang, Yang
Nugroho, Robertus Wahyu N.
Fan, Yimin
Rojas, Orlando J.
author_facet Bai, Long
Huan, Siqi
Xiang, Wenchao
Liu, Liang
Yang, Yang
Nugroho, Robertus Wahyu N.
Fan, Yimin
Rojas, Orlando J.
author_sort Bai, Long
collection PubMed
description [Image: see text] Highly charged (zeta potential ζ = +105 mV, acetate counterions) chitin nanoparticles (NCh) of three different average aspect ratios (∼5, 25, and >60) were obtained by low-energy deconstruction of partially deacetylated chitin. The nanoparticles were effective in reducing the interfacial tension and stabilized the oil/water interface via network formation (interfacial dilatational rheology data) becoming effective in stabilizing Pickering systems, depending on NCh size, composition, and formulation variables. The improved interfacial wettability and electrosteric repulsion facilitated control over the nanoparticle’s surface coverage on the oil droplets, their aspect ratio and stability against coalescence during long-term storage. Emulsion superstabilization (oil fractions below 0.5) occurred by the microstructuring and thickening effect of NCh that formed networks at concentrations as low as 0.0005 wt %. The ultrasound energy used during emulsion preparation simultaneously reduced the longer nanoparticles, producing very stable, fine oil droplets (diameter ∼1 μm). Our findings indicate that NCh surpasses any reported biobased nanoparticle, including nanocelluloses, for its ability to stabilize interfaces at ultralow concentrations and represent a step-forward in efforts to fully replace surfactants in multiphase systems.
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spelling pubmed-64482622019-04-05 Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization Bai, Long Huan, Siqi Xiang, Wenchao Liu, Liang Yang, Yang Nugroho, Robertus Wahyu N. Fan, Yimin Rojas, Orlando J. ACS Sustain Chem Eng [Image: see text] Highly charged (zeta potential ζ = +105 mV, acetate counterions) chitin nanoparticles (NCh) of three different average aspect ratios (∼5, 25, and >60) were obtained by low-energy deconstruction of partially deacetylated chitin. The nanoparticles were effective in reducing the interfacial tension and stabilized the oil/water interface via network formation (interfacial dilatational rheology data) becoming effective in stabilizing Pickering systems, depending on NCh size, composition, and formulation variables. The improved interfacial wettability and electrosteric repulsion facilitated control over the nanoparticle’s surface coverage on the oil droplets, their aspect ratio and stability against coalescence during long-term storage. Emulsion superstabilization (oil fractions below 0.5) occurred by the microstructuring and thickening effect of NCh that formed networks at concentrations as low as 0.0005 wt %. The ultrasound energy used during emulsion preparation simultaneously reduced the longer nanoparticles, producing very stable, fine oil droplets (diameter ∼1 μm). Our findings indicate that NCh surpasses any reported biobased nanoparticle, including nanocelluloses, for its ability to stabilize interfaces at ultralow concentrations and represent a step-forward in efforts to fully replace surfactants in multiphase systems. American Chemical Society 2019-03-03 2019-04-01 /pmc/articles/PMC6448262/ /pubmed/30956906 http://dx.doi.org/10.1021/acssuschemeng.8b04023 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Bai, Long
Huan, Siqi
Xiang, Wenchao
Liu, Liang
Yang, Yang
Nugroho, Robertus Wahyu N.
Fan, Yimin
Rojas, Orlando J.
Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization
title Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization
title_full Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization
title_fullStr Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization
title_full_unstemmed Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization
title_short Self-Assembled Networks of Short and Long Chitin Nanoparticles for Oil/Water Interfacial Superstabilization
title_sort self-assembled networks of short and long chitin nanoparticles for oil/water interfacial superstabilization
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6448262/
https://www.ncbi.nlm.nih.gov/pubmed/30956906
http://dx.doi.org/10.1021/acssuschemeng.8b04023
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