Pre-treatment with calcium hydroxide and accelerated carbonation for cellulosic pulp fibrillation

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

Nordic Pulp & Paper Research Journal Pub Date : 2023-03-24 DOI:10.1515/npprj-2022-0101

Lorran de Sousa Arantes, Adriano Reis Prazeres Mascarenhas, M. V. Scatolino, Gustavo Henrique Denzin Tonoli, L. Mendes, Ianca Oliveira Borges, J. B. Guimarães Júnior

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Abstract

Abstract In this study, the effect of different concentrations of calcium hydroxide (Ca(OH)2) was evaluated as a pre-treatment for accelerated carbonation and its influence on the fibrillation of cellulosic pulps to obtain nanofibrils, and its application as a coating agent for papers. Eucalyptus (EUC) and Pine (PIN) unbleached cellulosic fibers were submitted to pre-treatment with Ca(OH)2 at concentrations of 5 and 10% and subjected to accelerated carbonation, being subsequently mechanically fibrillated to produce cellulose nanofibrils (CNF). Pretreatment with calcium hydroxide followed by accelerated carbonation provided a 35% reduction in energy consumption. Cellulosic pulps EUC and PIN pretreated with calcium hydroxide showed higher fibrillation efficiency. There was a reduction in the cobb test values for papers coated with CNF in PIN. The WVP was lower for papers coated with CNF of EUC and control PIN. The CNF coating of EUC and PIN provided an oil barrier for the kit 11 solution. The CNF coating improved the dispersion of PVA and PVOH. The papers coated in this work have the potential to be used as packaging for fatty and oily foods or as a spreading agent for other industrial coatings.

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氢氧化钙预处理和加速碳酸化处理纤维素浆原纤化

摘要在本研究中，评估了不同浓度的氢氧化钙（Ca（OH）2）作为加速碳酸化的预处理的效果及其对纤维素纸浆原纤化以获得纳米纤维的影响，以及其作为纸张涂布剂的应用。将桉树（EUC）和松树（PIN）未漂白的纤维素纤维用浓度为5%和10%的Ca（OH）2进行预处理，并进行加速碳酸化，随后进行机械原纤化以生产纤维素纳米纤维（CNF）。用氢氧化钙预处理，然后加速碳酸化，可以减少35%的能耗。用氢氧化钙预处理的纤维素浆EUC和PIN显示出较高的纤化效率。在PIN中用CNF涂布的纸张的cobb测试值降低。涂布有EUC的CNF和对照PIN的纸张的WVP较低。EUC和PIN的CNF涂层为试剂盒11溶液提供了油屏障。CNF涂层改善了PVA和PVOH的分散性。这项工作中涂布的纸张有潜力用作脂肪和油性食品的包装，或用作其他工业涂料的铺展剂。

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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.