Zimmerleiter Robert, Kovacevic Jovana, Leitner Gerhard, Wimberger David, Lager Daniel, Friedl Sebastian, Pleschutznig Eduard, Barz Tilman, Brandstetter Markus
Research Center for Non-Destructive Testing GmbH, Altenberger Straße 69, 4040, Linz, Austria.
AIT Austrian Institute of Technology GmbH, Giefinggasse 2, 1210, Vienna, Austria.
Anal Bioanal Chem. 2025 Jul 3. doi: 10.1007/s00216-025-05983-0.
We describe a comprehensive analysis of the drying and curing kinetics of resol phenol-formaldehyde (PF) resin utilizing multiple different thermophysical and optical measurement techniques and combinations thereof to gain a comprehensive understanding of the physicochemical processes that take place during large-scale production of paper-based PF laminates. This included thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier-transform infrared evolved gas analysis (FTIR-EGA), and near-infrared (NIR) spectroscopy. In particular, the tailored integration of TGA with simultaneous near-infrared (NIR) spectroscopy in reflection geometry facilitated the evaluation of NIR spectroscopy's suitability for monitoring the ongoing process. This led to the implementation of an NIR-based real-time measurement setup at an industrial production site for a feasibility assessment. NIR spectroscopy in combination with partial least squares (PLS) regression modeling showed highly promising results highlighting the advantages of NIR spectroscopy as a tool for real-time inline quality control for large-scale production of PF resin laminates.
我们描述了一种对甲阶酚醛（PF）树脂干燥和固化动力学的全面分析，利用多种不同的热物理和光学测量技术及其组合，以全面了解在大规模生产纸质PF层压板过程中发生的物理化学过程。这包括热重分析（TGA）、差示扫描量热法（DSC）、傅里叶变换红外逸出气体分析（FTIR-EGA）和近红外（NIR）光谱。特别是，TGA与反射几何结构中的同步近红外（NIR）光谱的定制集成有助于评估NIR光谱对监测正在进行的过程的适用性。这导致在工业生产现场实施基于NIR的实时测量装置以进行可行性评估。NIR光谱与偏最小二乘法（PLS）回归建模相结合显示出非常有前景的结果，突出了NIR光谱作为大规模生产PF树脂层压板实时在线质量控制工具的优势。
