Holocellulose nanocrystals: amphiphilicity, oil/water emulsion, and self-assembly

Biomacromolecules
Feng Jiang, You-Lo Hsieh

Abstract

Amphiphilic holoCNCs were derived from rice straw holocellulose by sulfuric acid hydrolysis (64%, 45 °C, 45 min) at 11.6% yield (8.8% of rice straw). HoloCNCs are similar in lateral dimensions (4.1 ± 1.6 nm thick, 6.4 ± 1.8 nm wide), but shorter and more heterogeneous in lengths (113 ± 70 nm long), less negatively charged (0.128 mmol/g) and less crystalline (CrI 84.4%) than CNCs. HoloCNCs were also more thermally stable (Tmax =284 °C), attributed to the presence of residual lignosulfonate, hemicellulose, and silica. Most remarkable, the amphiphilic holoCNCs were more hydrophobic than CNCs, exhibiting distinct surface active behaviors and lowering equilibrium surface tension to 49.2 mN/m at above 0.57% critical aggregation concentration. HoloCNCs not only stabilize 30% more oil-in-water (O/W) emulsion and formed droplets (1.2-1.6 μm) doubled the sizes of those with CNCs, but also self-assembled into highly mesoporous structures with up to 3× higher specific surface (111 m(2)/g) and total pore volume (0.40 cm(3)/g) than that from CNCs upon freeze-drying. The unique surface active, amphiphilic, and less self-assembling properties of holoCNCs offer new desirable characteristics but without additional isolation process nor surface m...Continue Reading

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Apr 27, 2013·Carbohydrate Polymers·Feng Jiang, You-Lo Hsieh
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Mar 31, 2015·Carbohydrate Polymers·Feng Jiang, You-Lo Hsieh

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Citations

Mar 6, 2018·Advanced Materials·Eero KontturiOlli Ikkala
Feb 20, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Han TaoNing Lin
Dec 6, 2017·Advanced Materials·Feng JiangLiangbing Hu
Nov 13, 2019·Biomacromolecules·Pascal BertschPeter Fischer
Aug 17, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Hua-Neng XuLianfu Zhang
Jun 13, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·M Mahbubul BasharMasaya Mitsuishi

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