杂多酸催化处理对溶解浆反应性增强和粘度控制的作用。
Heteropoly acid catalytic treatment for reactivity enhancement and viscosity control of dissolving pulp.
机构信息
College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an 710021, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, Shaanxi University of Science and Technology, Xi'an 710021, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
出版信息
Bioresour Technol. 2018 Apr;253:182-187. doi: 10.1016/j.biortech.2018.01.022. Epub 2018 Jan 6.
The reactivity enhancement and viscosity control are of practical importance during the manufacture of high-quality cellulose (also known as dissolving pulp). In the study, the concept of using phosphotungstic acid (HPW) for this purpose was demonstrated. The Fock reactivity of resultant pulp increased from 49.1% to 74.1% after the HPW catalytic treatment at a dosage of 86.4 mg HPW/g odp. The improved results can be attributed to the increased fiber accessibility, thanks to the favorable fiber morphologic changes, such as increased pore volume/size, water retention value and specific surface area. HPW can be readily recycled/reused by evaporating method, where maintaining 87.1% catalytic activity after six recycle times. The HPW catalytic treatment concept may provide a green alternative for the manufacture of high-quality dissolving pulp.
在制造高质量纤维素（也称为溶解浆）的过程中，提高反应性和控制粘度具有实际意义。在这项研究中，展示了使用磷钨酸（HPW）实现这一目的的概念。在用量为 86.4mg HPW/g 绝干浆的 HPW 催化处理后，所得纸浆的 Fock 反应性从 49.1%提高到 74.1%。改进的结果可归因于纤维可及性的增加，这要归功于有利的纤维形态变化，例如增加的孔体积/尺寸、保水值和比表面积。通过蒸发法可以很容易地回收/再利用 HPW，在六次回收后仍保持 87.1%的催化活性。HPW 催化处理概念可为制造高质量溶解浆提供一种绿色替代方案。
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