木材/细菌纤维素和几丁质纳米水凝胶的流变性能随浓度的变化及其纳米膜特性

IF 3.8 4区工程技术 Q1 BIOCHEMICAL RESEARCH METHODS

IET nanobiotechnology Pub Date : 2022-04-04 DOI:10.1049/nbt2.12083

Hesamoddin Jannatamani, A. Motamedzadegan, M. Farsi, H. Yousefi

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引用次数: 4

摘要

摘要在本研究中，研究了木纤维纳米纤维（WCNF）、细菌纤维素纳米纤维（BCNF）和甲壳素纳米纤维（ChNF）的流变性能以及由每种纳米水凝胶制备的薄膜的物理性能。每种纳米水凝胶以0.5和1wt%的2种浓度制备，用于流变学研究。使用旋转流变仪测量流变特性。流动行为数据与流变模型进行了拟合。纳米水凝胶浓度越高，表观粘度越高。赫歇尔-Bulkley模型是流动行为数据拟合的最佳模型。BCNF纳米水凝胶具有最高的磁滞回线，而WCNF纳米水凝胶的结构恢复率最好，磁滞回线最低。在LVE（线性粘弹性区），G′（储能模量）和G〃（损失模量）具有恒定值，但随着应变的增加，它们的值减小。在频率扫描测试期间，发现所有样品的储能模量都大于损耗模量。BCNF纳米水凝胶显示出最低的频率依赖性。甲壳素纳米膜具有最高的伸长率和应力值。

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Rheological properties of wood/bacterial cellulose and chitin nano‐hydrogels as a function of concentration and their nano‐films properties

Abstract In this study, rheological properties of the Wood Cellulose NanoFibers (WCNF), Bacterial Cellulose NanoFibers (BCNF), and Chitin NanoFibers (ChNF) as well as physical properties of films prepared from each nano‐hydrogel were investigated. Each nano‐hydrogel was prepared in 2 concentrations of 0.5 and 1 wt% for rheological study. Rheological properties were measured using a rotational rheometer. The flow behaviour data were fitted with rheological models. Apparent viscosity was higher in higher concentrations of nano‐hydrogels. Herschel‐Bulkley model was the best model for flow behaviour data fitting. BCNF nano‐hydrogels had the highest hysteresis loop while WCNF nano‐hydrogels had the best structure recovery and lowest hysteresis loop. At LVE (Linear Viscoelastic Region), G′ (storage modulus) and G″ (loss modulus) had a constant value, but as strain increased their values decreased. Storage modulus was found to be greater than loss modulus in all samples during frequency sweep test. BCNF nano‐hydrogel showed the lowest frequency dependency. Chitin nanofilms had the highest elongation and stress value.

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来源期刊

IET nanobiotechnology 工程技术-纳米科技

CiteScore

6.20

自引率

4.30%

发文量

审稿时长

1 months

期刊介绍： Electrical and electronic engineers have a long and illustrious history of contributing new theories and technologies to the biomedical sciences. This includes the cable theory for understanding the transmission of electrical signals in nerve axons and muscle fibres; dielectric techniques that advanced the understanding of cell membrane structures and membrane ion channels; electron and atomic force microscopy for investigating cells at the molecular level. Other engineering disciplines, along with contributions from the biological, chemical, materials and physical sciences, continue to provide groundbreaking contributions to this subject at the molecular and submolecular level. Our subject now extends from single molecule measurements using scanning probe techniques, through to interactions between cells and microstructures, micro- and nano-fluidics, and aspects of lab-on-chip technologies. The primary aim of IET Nanobiotechnology is to provide a vital resource for academic and industrial researchers operating in this exciting cross-disciplinary activity. We can only achieve this by publishing cutting edge research papers and expert review articles from the international engineering and scientific community. To attract such contributions we will exercise a commitment to our authors by ensuring that their manuscripts receive rapid constructive peer opinions and feedback across interdisciplinary boundaries. IET Nanobiotechnology covers all aspects of research and emerging technologies including, but not limited to: Fundamental theories and concepts applied to biomedical-related devices and methods at the micro- and nano-scale (including methods that employ electrokinetic, electrohydrodynamic, and optical trapping techniques) Micromachining and microfabrication tools and techniques applied to the top-down approach to nanobiotechnology Nanomachining and nanofabrication tools and techniques directed towards biomedical and biotechnological applications (e.g. applications of atomic force microscopy, scanning probe microscopy and related tools) Colloid chemistry applied to nanobiotechnology (e.g. cosmetics, suntan lotions, bio-active nanoparticles) Biosynthesis (also known as green synthesis) of nanoparticles; to be considered for publication, research papers in this area must be directed principally towards biomedical research and especially if they encompass in vivo models or proofs of concept. We welcome papers that are application-orientated or offer new concepts of substantial biomedical importance Techniques for probing cell physiology, cell adhesion sites and cell-cell communication Molecular self-assembly, including concepts of supramolecular chemistry, molecular recognition, and DNA nanotechnology Societal issues such as health and the environment Special issues. Call for papers: Smart Nanobiosensors for Next-generation Biomedical Applications - https://digital-library.theiet.org/files/IET_NBT_CFP_SNNBA.pdf Selected extended papers from the International conference of the 19th Asian BioCeramic Symposium - https://digital-library.theiet.org/files/IET_NBT_CFP_ABS.pdf