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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) >Development of model surfaces for different pulp fibre components
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Development of model surfaces for different pulp fibre components

机译：为不同的纸浆纤维组件开发模型表面

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This paper introduces methods to produce model surfaces for the main pulp fibre components, cellulose, lignin and extractives. Model film for cellulose was prepared using Langmuir-Blodgett (LB) technique. Lignin and extractive model films were produced using spincoating. The primary aim for the use of these surfaces is adsorption studies performed with the quartz crystal microbalance with dissipation (QCM-D) instrument. Thus, all the model films were deposited on the hydrophobic, polystyrene coated QCM-D crystals. Based on the atomic force microscopy (AFM) and X-Ray photoelectron spectroscopy (XPS) analyses, smooth, thin and rigid model films were achieved and they were found to be evenly distributed on the polystyrene surface. The stability of the films in aqueous solutions at different ionic strengths (cellulose and lignin films) and pH (extractive film) were studied using QCM-D. Some swelling/deswelling but no layer softening was detected with cellulose film. Some water penetrated into the lignin film but no swelling was detected. Extractive film was stable in acidic and neutral conditions but saponification of the fatty and resin acids at basic conditions resulted an unstable film. Model films were shown to give reproducible results when studying the carbohydrate adsorption with QCM-D. It was found that the adsorbed mass, physical properties of the formed adsorbed layer and the layer formation within the time scale used were all reproducible.
机译：本文介绍了生产主要纸浆纤维成分，纤维素，木质素和提取物的模型表面的方法。使用Langmuir-Blodgett（LB）技术制备纤维素模型膜。使用旋涂法生产木质素和提取模型膜。使用这些表面的主要目的是利用带耗散的石英晶体微天平（QCM-D）仪器进行吸附研究。因此，所有模型膜均沉积在疏水的，聚苯乙烯涂层的QCM-D晶体上。基于原子力显微镜（AFM）和X射线光电子能谱（XPS）分析，获得了光滑，薄而刚性的模型膜，发现它们均匀地分布在聚苯乙烯表面上。使用QCM-D研究了膜在水溶液中在不同离子强度（纤维素和木质素膜）和pH（萃取膜）下的稳定性。纤维素膜检测到一些溶胀/溶胀，但没有软化。一些水渗透到木质素膜中，但是没有发现膨胀。萃取膜在酸性和中性条件下是稳定的，但是在碱性条件下脂肪酸和树脂酸的皂化作用会导致膜不稳定。当研究QCM-D对碳水化合物的吸附时，模型胶片显示出可再现的结果。发现所使用的时间范围内的吸附质量，所形成的吸附层的物理性质和层的形成都是可再现的。

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