Research on the brightening effect of miscible wetting additives on fly ash coatings

IF 0.9 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD

Nordic Pulp & Paper Research Journal Pub Date : 2024-02-14 DOI:10.1515/npprj-2023-0020

Zehao Wang, Jingkun Yang, Hangtian Gao, Jianan Liu, Fengyu Li, Deli Zeng, Hongyan Mou, Huiming Fan

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Abstract

The resource utilization of fly ash has always been a popular topic in the field of solid waste recycling. This paper is based on the three-phase reaction system of “fly ash (s)-[Ca(OH)2–H2O/ethanol] (l)-CO2 (g)”, using the bubble carbonization method to carry out heterogeneous phase reaction with fly ash as the core crystallized to form a fly ash-based calcium carbonate composite with higher brightness. The composite material is used in the filling of paper instead of calcium carbonate filler. Based on the previous research of our team, we focused on exploring the addition of miscible wettability additives (ethanol and acetone) to improve the wettability of the reaction system, thereby improving the whitening and modification effect of fly ash. The results showed that the addition of ethanol and acetone can significantly improve the coating effect of fly ash, however, acetone is slightly toxic, more volatile, and expensive than ethanol, so ethanol is more suitable as a wetting agent to be added to the reaction system. Under the optimal coating conditions, when the ratio of ethanol and water is 1:1, the brightness of fly ash can reach 71.62 % ISO, which is 17.29 % ISO higher than that without ethanol.

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混溶润湿添加剂对粉煤灰涂料增白效果的研究

粉煤灰的资源化利用一直是固废回收领域的热门话题。本文以 "粉煤灰（s）-[Ca（OH）2-H2O/乙醇]（l）-CO2（g）"三相反应体系为基础，采用气泡碳化法进行以粉煤灰为核心结晶的异相反应，形成白度较高的粉煤灰基碳酸钙复合材料。该复合材料可代替碳酸钙填料用于纸张的填充。在本团队前期研究的基础上，我们重点探索了添加可混溶的润湿添加剂（乙醇和丙酮）来改善反应体系的润湿性，从而提高粉煤灰的增白和改性效果。结果表明，添加乙醇和丙酮可显著改善粉煤灰的涂布效果，但丙酮比乙醇略毒、易挥发、价格昂贵，因此乙醇更适合作为润湿剂添加到反应体系中。在最佳涂布条件下，当乙醇和水的比例为 1:1 时，粉煤灰的白度可达 71.62 % ISO，比不添加乙醇时的白度高出 17.29 % ISO。

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来源期刊

Nordic Pulp & Paper Research Journal 工程技术-材料科学：纸与木材

CiteScore

2.50

自引率

16.70%

发文量

审稿时长

1 months

期刊介绍： Nordic Pulp & Paper Research Journal (NPPRJ) is a peer-reviewed, international scientific journal covering to-date science and technology research in the areas of wood-based biomass: Pulp and paper: products and processes Wood constituents: characterization and nanotechnologies Bio-refining, recovery and energy issues Utilization of side-streams from pulping processes Novel fibre-based, sustainable and smart materials. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes. Topics Cutting-edge topics such as, but not limited to, the following: Biorefining, energy issues Wood fibre characterization and nanotechnology Side-streams and new products from wood pulping processes Mechanical pulping Chemical pulping, recovery and bleaching Paper technology Paper chemistry and physics Coating Paper-ink-interactions Recycling Environmental issues.