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热老化对细胞壁生物聚合物黏附力的影响。

Effects of Thermal Aging on the Adhesion Forces of Biopolymers of Wood Cell Walls.

机构信息

Division of Organic and Wood-Based Materials, TU Braunschweig, Hopfengarten 20, 38102 Braunschweig, Germany.

Fraunhofer Wilhelm-Klauditz-Institut WKI, Bienroder Weg 54E, 38108 Braunschweig, Germany.

出版信息

Biomacromolecules. 2022 Apr 11;23(4):1601-1609. doi: 10.1021/acs.biomac.1c01397. Epub 2022 Mar 18.

DOI:10.1021/acs.biomac.1c01397
PMID:35303409
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9006222/
Abstract

Wood is the most important, industrially used renewable resource on the planet, but the aging mechanism of biopolymers on cell walls is poorly understood. Adhesion properties are of critical importance for wood and many other lignocellulosic materials. We used atomic force microscopy and defined the jump-off force ratio in the retract force-displacement curve to study the adhesion force phenomenon and the effects of heat treatments. Here, we identified two sigmoidal curves describing the shift of the adhesion force and the jump-off force ratio: the first curve was attributed to the movement of extractives and the second to the degradation of the hemicellulose-lignin matrix. We confirmed the hypothesis formulated in this paper by the cell wall surface topography, the analysis of the treated samples by Fourier transform infrared spectroscopy, and the analysis of volatiles during heating by headspace gas chromatography-mass spectrometry.

摘要

木材是地球上最重要的工业用可再生资源，但细胞壁中生物聚合物的老化机制还了解甚少。对于木材和许多其他木质纤维素材料而言，粘附性能至关重要。我们使用原子力显微镜并在回缩力-位移曲线中定义了起跳力比，以研究粘附力现象和热处理的影响。在这里，我们确定了两个描述粘附力和起跳力比变化的 S 形曲线：第一个曲线归因于提取物的运动，第二个曲线归因于半纤维素-木质素基质的降解。我们通过细胞壁表面形貌、傅里叶变换红外光谱对处理样品的分析以及顶空气相色谱-质谱法对加热过程中挥发性物质的分析，证实了本文提出的假设。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/7e988d80ed23/bm1c01397_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/89e138d3b755/bm1c01397_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/a4a842a0e2e0/bm1c01397_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/267464404b78/bm1c01397_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/bd2e862efe5c/bm1c01397_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/f80e64ce82f2/bm1c01397_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/8ad4d8358354/bm1c01397_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/7e988d80ed23/bm1c01397_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/89e138d3b755/bm1c01397_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/a4a842a0e2e0/bm1c01397_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/267464404b78/bm1c01397_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/bd2e862efe5c/bm1c01397_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/f80e64ce82f2/bm1c01397_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/8ad4d8358354/bm1c01397_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e37d/9006222/7e988d80ed23/bm1c01397_0008.jpg

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