Effect of Lignin Particle Size on the Properties of Cellulose Nanofiber/Lignin Composite Sheets

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Interfaces Pub Date : 2024-07-31 DOI:10.1002/admi.202400455

Yasuaki Inoue, Kevin H. Putera, Leonie van ‘t Hag, Warren Batchelor

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Abstract

Cellulose and lignin have been widely studied to develop a bio‐based alternative to replace fossil‐based packaging materials and coatings. Lignin can be used to improve the water vapor barrier properties of cellulose‐based sheets due to its hydrophobicity. In this study, composite sheets based on cellulose nanofiber (CNF) and lignin are formed via spray deposition the effects of lignin particle size and concentration on the properties of the composite sheets are investigated. Scanning electron microscopy and atomic force microscopy with infrared spectroscopy analysis show that lignin nanoparticles (LNPs, particle diameter <100 nm) migrate to the top surface during drying to form a dense layer. The water vapor permeability of the sheet including LNPs is reduced to 4.5 × 10−11 g·s−1·m−1·Pa−1, which is ≈20% lower than the value for CNF alone. This improvement is related to the dense LNP layer on the top surface. Water contact angle measurements indicate that the layer of LNPs also increases the surface hydrophobicity. Overall, this study provides a simple process to produce a fully bio‐based option for packaging material with enhanced water vapor barrier properties and surface hydrophobicity.

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木质素粒度对纤维素纳米纤维/木质素复合片材性能的影响

人们广泛研究纤维素和木质素，以开发生物基替代品，取代化石基包装材料和涂料。木质素具有疏水性，可用于改善纤维素基薄片的水蒸气阻隔性能。本研究通过喷雾沉积法形成了基于纤维素纳米纤维（CNF）和木质素的复合片材，并研究了木质素粒度和浓度对复合片材性能的影响。扫描电子显微镜和原子力显微镜以及红外光谱分析表明，木质素纳米颗粒（LNPs，颗粒直径为 100 nm）在干燥过程中迁移到顶部表面，形成致密层。包括 LNPs 的薄片的水蒸气渗透率降低到 4.5 × 10-11 g-s-1-m-1-Pa-1，比单独使用 CNF 时的值低≈20%。这一改善与顶面致密的 LNP 层有关。水接触角测量结果表明，LNPs 层也增加了表面疏水性。总之，这项研究提供了一种简单的工艺，可以生产出一种完全基于生物的包装材料，具有更强的水蒸气阻隔性能和表面疏水性。

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来源期刊

Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.40

自引率

5.60%

发文量

1174

审稿时长

1.3 months

期刊介绍： Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.