Monitoring of Liquid Based Microbial Bioplastic Degradation by Differential Scanning Calorimetry (DSC)

IF 3.2 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Su Hyun Kim, Yebin Han, Gaeun Lim, Jeong Chan Joo, Shashi Kant Bhatia, Jungoh Ahn, Woo-Young Jeon, Hee Taek Kim, Yung-Hun Yang
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引用次数: 0

Abstract

To monitor the degradation of bioplastics by microbes and enzymes, conventional weight-based and chromatography-based methods have been commonly used. However, these approaches require time-consuming sample preparation and often suffer from low reproducibility from different recovery method. As an alternative, this study proposes a quantitative approach using differential scanning calorimetry (DSC), a technique traditionally used to analyze the thermal properties of polymers. This method directly applies lyophilization without washing and drying samples and uses DSC analysis to quantify the enthalpy change (ΔH) at the melting temperature of bioplastic residues. When PHB films were analyzed after optimizations, a strong linear correlation (R2 > 0.99) between ΔH and film mass was observed across all cases. Compared to conventional, the DSC method showed less than 3.5% deviation from the gas chromatography (GC) method, contrary to the weight-based method showing more than 14% difference from the GC-based method. This method expands the ability to quantify different types of bioplastics such as poly(butylene succinate) (PBS) and polycaprolactone (PCL), simultaneously. This research highlights DSC as a simple, reproducible, and broadly applicable approach for monitoring bioplastic degradation quantitatively, offering a promising alternative to labor-intensive conventional methods.

差示扫描量热法(DSC)监测液体微生物降解生物塑料
为了监测微生物和酶对生物塑料的降解,传统的基于重量的方法和基于色谱的方法是常用的。然而,这些方法需要花费大量的时间来制备样品,而且不同的回收方法往往存在重复性低的问题。作为替代方案,本研究提出了一种定量方法,使用差示扫描量热法(DSC),这是一种传统上用于分析聚合物热性能的技术。该方法直接采用冻干法,无需洗涤和干燥样品,并使用DSC分析来量化生物塑料残留物在熔化温度下的焓变(ΔH)。优化后对PHB膜进行分析,发现ΔH与膜质量之间存在很强的线性相关(R2 > 0.99)。与常规方法相比,DSC方法与气相色谱(GC)方法的偏差小于3.5%,而基于重量的方法与基于GC的方法的偏差大于14%。该方法扩展了同时量化不同类型生物塑料的能力,如聚丁二酸丁二烯(PBS)和聚己内酯(PCL)。本研究强调DSC是一种简单、可重复、广泛适用的定量监测生物塑料降解的方法,为劳动密集型的传统方法提供了一种有希望的替代方法。
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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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