Monodispersed Renewable Particles by Cascade and Density Gradient Size Fractionation to Advance Lignin Nanotechnologies
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-08-22
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en
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Small, Volume 20, issue 34
Abstract
Control over particle size and shape heterogeneity is highly relevant to the design of photonic coatings and supracolloidal assemblies. Most developments in the area have relied on mineral and petroleum-derived polymers that achieve well-defined chemical and dimensional characteristics. Unfortunately, it is challenging to attain such control when considering renewable nanoparticles. Herein, a pathway toward selectable biobased particle size and physicochemical profiles is proposed. Specifically, lignin is fractionated, a widely available heterogeneous polymer that can be dissolved in aqueous solution, to obtain a variety of monodispersed particle fractions. A two-stage cascade and density gradient centrifugation that relieves the need for solvent pre-extraction or other pretreatments but achieves particle bins of uniform size (~60 to 860 nm and polydispersity, PDI<0.06, dynamic light scattering) along with characteristic surface chemical features is introduced. It is found that the properties and associated colloidal behavior of the particles are suitably classified in distinctive size populations, namely, i) nanoscale (50–100 nm), ii) photonic (100–300 nm) and iii) near-micron (300–1000 nm). The strong correlation that exists between size and physicochemical characteristics (molar mass, surface charge, bonding and functional groups, among others) is introduced as a powerful pathway to identify nanotechnological uses that benefit from the functionality and cost-effectiveness of biogenic particles.Description
The authors acknowledge funding support from the Canada Excellence Research Chair Program (CERC-2018-00006), Canada Foundation for Innovation (Project 38623), the Pacific Economic Development Canada (PacifiCAN) and the British Columbia Ministry of Forests. The authors acknowledge Yuki Liang and Maria Ezhova (UBC Chemistry NMR Facilities) for NMR data collection and the UBC Bioimaging facility (RRID: SCR_021304) along with Naoji Yubuki, Derrick Horne, EunKyoung Lee, and Miki Fujita for TEM and SEM technical support.
Keywords
centrifugation, functional groups, Lignin particles, photonic colloidal glass, photonic color, size fractionation, zeta potential
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Chen, J, Tian, J, Feng, N, Ning, L, Wang, D, Zhao, B, Guo, T, Song, J & Rojas, O J 2024, ' Monodispersed Renewable Particles by Cascade and Density Gradient Size Fractionation to Advance Lignin Nanotechnologies ', Small, vol. 20, no. 34, 2309756 . https://doi.org/10.1002/smll.202309756