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首页> 外文会议>Appita Annual Conference and Exhibition incorporating the ISWFPC(International Symposium on Wood, Fibre and Pulping Chemistry) vol.2: 13th ISWFPC Sessions - Oral Papers; 20050516-19; Auckland(NZ) >Detecting wood extractives on pulp fibre surfaces using AFM and ESCA
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Detecting wood extractives on pulp fibre surfaces using AFM and ESCA

机译：使用AFM和ESCA检测纸浆纤维表面的木材提取物

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摘要

The morphology of wood resin precipitated on bleached kraft pulp surfaces has been investigated using AFM and ESCA techniques. We show how an alternative approach, i.e. elemental depth distributions derived from spectral background can be used in combination with the surface concentrations data to facilitate the interpretation of AFM data in geometrically complex systems. Extractives, leached from thermomechanical pulp using hexane, were dissolved in acetone and then precipitated in water. Different amounts of extractives dispersion was thereafter applied on pulp surfaces. AFM phase images suggested that the precipitated extractives formed a thin film on the fibre surface. Conventional ESCA analyses verified the presence of extractives on the pulp surfaces. Furthermore, the changing peak-to-background ratio of the oxygen signal in the measured ESCA spectra indicated that the depth distribution of oxygen was changing with the addition of the dispersed extractives. The background data supported the hypothesis that the extractives were adsorbed as a thin film covering the pulp substrate. The results were also compared to AFM images of deposited resin on other surfaces.
机译：已使用AFM和ESCA技术研究了沉淀在漂白牛皮纸浆表面上的木质树脂的形态。我们展示了如何将替代方法（即从光谱背景得出的元素深度分布）与表面浓度数据结合使用，以促进在几何复杂系统中对AFM数据的解释。使用己烷从热机械浆中浸出的萃取物溶解在丙酮中，然后在水中沉淀。此后将不同量的提取物分散体施加在纸浆表面上。 AFM相图表明，沉淀的萃取物在纤维表面形成了薄膜。常规的ESCA分析证实了纸浆表面上存在提取物。此外，在测得的ESCA谱中，氧气信号的峰-峰-背景比的变化表明，氧气的深度分布随分散萃取物的添加而变化。背景数据支持这样的假设，即提取物被吸附为覆盖果肉基质的薄膜。还将结果与其他表面沉积的树脂的AFM图像进行了比较。

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