Use of carbonated cellulose micro/nanofibrils in the coating of sack kraft paper

IF 2.4 3区 农林科学 Q1 FORESTRY European Journal of Wood and Wood Products Pub Date : 2024-04-08 DOI:10.1007/s00107-024-02068-0
Lorran de Sousa Arantes, Adriano Reis Prazeres Mascarenhas, Ianca Oliveira Borges, Rafael Carvalho do Lago, Carlos Henrique da Silva, Murilo Daniel de Mello Innocentini, Lourival Marin Mendes, Gustavo Henrique Denzin Tonoli
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Abstract

Coating paper with cellulose micro/nanofibrils (CMF/CNF) can improve the performance of paper packaging. However, the cost of the process is high due to the significant energy consumption during the CMF/CNF production process, which can be reduced through pre-treatment of cellulosic fibers. The objective of this work was, therefore, to evaluate the performance of CMF/CNF subjected to accelerated carbonation with different concentrations of calcium hydroxide (5% and 10% m/m) as a paper coating for packaging production in terms of spreading properties of adhesives, air permeability, and water absorption. The CMF/CNF coating was able to fill pores contained in the papers, with the treatment with 10% carbonation (CMF/CNF 10%) being the one that adhered best to the surface. There was a reduction in surface roughness from 1.35 ± 0.53 μm (uncoated paper) to 0.72 ± 0.21 μm (CMF/CNF 10%). Similarly, air permeability in the coated treatments was decreased, indicating good barrier properties and possible CO2 absorption activity in the carbonated samples. Coated papers showed greater spreading of water, PVA, and PVOH. On the other hand, the Cobb value dropped from 41.55 ± 3.83 g m2 (uncoated paper) to 26.26 ± 2.36 g m2 (CMF/CNF 10%). CMF/CNF subjected to pre-treatment with accelerated carbonation have the potential for use as a coating material, being recommended for applications in food packaging and those that will be subjected to gluing/coating processes with other materials.

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在麻袋牛皮纸涂层中使用碳化纤维素微纤维/纳米纤维
用纤维素微/纳米纤维(CMF/CNF)涂布纸可以改善纸包装的性能。然而,由于 CMF/CNF 生产过程中需要消耗大量能源,因此工艺成本较高,而通过对纤维素纤维进行预处理可以降低能耗。因此,这项工作的目的是评估使用不同浓度的氢氧化钙(5% 和 10% m/m)对 CMF/CNF 进行加速碳化处理后作为包装生产用纸涂层的性能,包括粘合剂的铺展性、透气性和吸水性。CMF/CNF 涂层能够填充纸张中的孔隙,其中碳化 10% 处理(CMF/CNF 10%)的涂层与纸张表面的粘附性最好。表面粗糙度从 1.35 ± 0.53 μm(未涂布纸)降至 0.72 ± 0.21 μm(CMF/CNF 10%)。同样,涂布处理的透气性也降低了,这表明碳酸纸样品具有良好的阻隔性和可能的二氧化碳吸收活性。涂布纸显示出更大的水、PVA 和 PVOH 扩散性。另一方面,Cobb 值从 41.55 ± 3.83 g m2(未涂布纸)降至 26.26 ± 2.36 g m2(CMF/CNF 10%)。经过加速碳化预处理的 CMF/CNF 有潜力用作涂层材料,建议用于食品包装和需要与其他材料进行粘合/涂层处理的包装。
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来源期刊
European Journal of Wood and Wood Products
European Journal of Wood and Wood Products 工程技术-材料科学:纸与木材
CiteScore
5.40
自引率
3.80%
发文量
124
审稿时长
6.0 months
期刊介绍: European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.
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