通过聚乙二醇接枝实现具有优异分散稳定性的甲壳素纳米须/金纳米团簇杂化物

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Langmuir Pub Date : 2024-10-22 Epub Date: 2024-10-07 DOI:10.1021/acs.langmuir.4c02404

Jun Araki, Hyougo Okuda

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引用次数: 0

摘要

制备了由甲壳素纳米须（ChNWs）和金纳米团簇（AuNCs）组成的具有更高稳定性的混合纳米粒子。通过原位脱保护和还原胺化 ChNWs 的表面氨基（SAGs），接枝了带有末端甲酰基和二乙缩醛保护基团的 mPEGs。用 30% 的氢氧化钠溶液处理甲壳素可提高酸水解得到的 ChNW 的 SAG 含量，从而增强 mPEG 的接枝效果。获得的立体稳定 ChNW/AuNC 混合物在较高的 AuNC 和电解质浓度下表现出显著的分散稳定性。

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Chitin Nanowhisker/Gold Nanocluster Hybrids with an Excellent Dispersion Stability via Poly(ethylene glycol) Grafting.

Hybrid nanoparticles composed of chitin nanowhiskers (ChNWs) and gold nanoclusters (AuNCs) having an improved stability were prepared. The grafting of monomethoxypoly(ethylene glycol) (mPEG) and subsequent surface adsorption of AuNCs enabled the steric stabilization of ChNW/AuNC hybrids. mPEGs with terminal formyl groups and diethylacetal protecting groups were grafted via in situ deprotection and reductive amination with the surface amino groups (SAGs) of ChNWs. The treatment of chitin with a 30% sodium hydroxide solution improved the SAG contents of the ChNWs obtained from acid hydrolysis, resulting in an enhancement in mPEG grafting. The obtained sterically stabilized ChNW/AuNC hybrids exhibited remarkable dispersion stability at higher AuNC and electrolyte concentrations.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).