冲击波对天然壳聚糖生物聚合物的影响

IF 1.7 4区 工程技术 Q4 POLYMER SCIENCE International Journal of Polymer Analysis and Characterization Pub Date : 2023-01-01 DOI:10.1080/1023666X.2022.2146917
H.A. Pranav , B. Sudarshan , Shashikant N. Joshi
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引用次数: 0

摘要

在本研究中,研究了冲击波对壳聚糖(CS)材料样品的影响。冲击管用于产生冲击波,实验是在1.6的冲击马赫数下进行的。CS材料样品通过固定在从动管端法兰处而暴露于冲击波中,并受到30、60和90个冲击脉冲的冲击。通过傅立叶变换红外光谱(FT-IR)、X射线衍射(XRD)、扫描电子显微镜(SEM)和粘度计对CS材料在冲击后的结构变化进行了表征。处理过的样品的FT-IR结果表明,随着酰胺的官能度通过降低样品的质量而增加,键长减小。对于暴露于90个冲击脉冲的CS样品,观察到显著的变化。脱乙酰度从75%提高到89%。XRD结果表明,处理后的样品中晶粒尺寸增加了109%,SEM图像中观察到显著的形态变化。粘度降低到88%,分子量降低92%表明冲击处理的CS样品含有高水溶性。结果强调,冲击管技术可以快速发现CS解聚反应的有利变化,并证明这是一种高效、成本效益高、耗时少的方法。
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Effect of shock wave impact on natural chitosan biopolymer

In the present study, the influence of shockwave impact on chitosan (CS) material samples is investigated. The shock tube is used to create the shock wave and the experiments are conducted for a shock Mach number of 1.6. CS material sample is exposed to the shock wave by fixing at the driven tube end flange and impacted to 30, 60 and 90 shock impulses. CS material after the impact was characterized for its structural changes by the Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and viscometer results. The FT-IR results of the treated sample indicate that the bond length is reduced as the functionality of amide increases by lowering the mass of the samples. Significant changes are observed for the CS samples exposed to 90 shock pulses. The degree of deacetylation is increased from 75% to 89%. XRD results indicate that the crystallite size is enhanced by 109% in the treated samples and significant morphological changes are noticed in the SEM images. The viscosity is decreased to 88% and the reduction in molecular weight by 92% indicates the shock-treated CS samples contain high water solubility. Results emphasized that the shock tube technique yields quick findings with favorable changes in the CS depolymerization reaction and demonstrated that it is an efficient, cost-effective and less time-consuming approach.

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来源期刊
CiteScore
3.50
自引率
5.30%
发文量
37
审稿时长
1.6 months
期刊介绍: The scope of the journal is to publish original contributions and reviews on studies, methodologies, instrumentation, and applications involving the analysis and characterization of polymers and polymeric-based materials, including synthetic polymers, blends, composites, fibers, coatings, supramolecular structures, polysaccharides, and biopolymers. The Journal will accept papers and review articles on the following topics and research areas involving fundamental and applied studies of polymer analysis and characterization: Characterization and analysis of new and existing polymers and polymeric-based materials. Design and evaluation of analytical instrumentation and physical testing equipment. Determination of molecular weight, size, conformation, branching, cross-linking, chemical structure, and sequence distribution. Using separation, spectroscopic, and scattering techniques. Surface characterization of polymeric materials. Measurement of solution and bulk properties and behavior of polymers. Studies involving structure-property-processing relationships, and polymer aging. Analysis of oligomeric materials. Analysis of polymer additives and decomposition products.
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