Projects per year
Abstract
As a contribution to expand accessibility in the territory of bio-based nanomaterials, we demonstrate a novel material strategy to convert amorphous xylan preserved in wood biomass to hierarchical assemblies of crystalline nanoxylan on a multi-length scale. By reducing the end group in pressurized hot water extracted (PHWE) xylan to primary alcohol as a xylitol form with borohydride reduction, the endwise-peeling depolymerization is effectively impeded in the alkali-catalyzed hydrolytic cleavage of side substitutions in xylan. Nanoprecipitation by a gradual pH decrease resulted in a stable hydrocolloid dispersion in the form of worm-like nanoclusters assembled with primary crystallites, owing to the self-assembly of debranched xylan driven by strong intra- and inter-chain H-bonds. With evaporation-induced self-assembly, we can further construct the hydrocolloids as dry submicron spheroids of crystalline nanoxylan (CNX) with a high average elastic modulus of 47–83 GPa. Taking the advantage that the chain length and homogeneity of PHWE-xylan can be tailored, a structure-performance correlation was established between the structural order in CNX and the phosphorescent emission of this crystalline biopolymer. Rigid clusterization and high crystallinity that are constructed by strong intra- and inter-molecule interactions within the nanoxylan effectively restrict the molecular motion, thereby promoting the emission of ultralong organic phosphorescence.
Original language | English |
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Article number | 122089 |
Journal | Carbohydrate Polymers |
Volume | 335 |
DOIs | |
Publication status | Published - 26 Mar 2024 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Xylan
- Crystalline nanoxylan
- Nanocluster hydrocolloids
- Bio-based nanomaterials
- Phosphorescence
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Dive into the research topics of 'Crystalline nanoxylan from hot water extracted wood xylan at multi-length scale: Molecular assembly from nanocluster hydrocolloids to submicron spheroids'. Together they form a unique fingerprint.Equipment
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Åbo Akademi Functional Printing Center
Martti Toivakka (PI), Jessica Rosenholm (PI), Nicklas Anttu (PI), Johan Bobacka (PI), Tan Phat Huynh (PI), Jouko Peltonen (PI), Xiaoju Wang (PI), Carl-Eric Wilen (PI), Chunlin Xu (PI), Hongbo Zhang (PI) & Ronald Österbacka (PI)
Faculty of Science and EngineeringFacility/equipment: Facility
Projects
- 1 Active
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SusCellInk: Sustainable nanocellulose-based bioinks towards diverse material functionalities and therapeutic delivery of bioactive cues
01/09/20 → 31/08/25
Project: Research Council of Finland/Other Research Councils