喷涂纤维素纳米纤维膜的阻隔性能

IF 1.5 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Micro & Nano Letters Pub Date : 2023-02-03 DOI:10.3390/micro3010014
K. Shanmugam, N. Chandrasekar, R. Balaji
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引用次数: 1

摘要

纤维素纳米纤维(CNF)是一种可持续的纳米材料,用于开发可再生、可回收和可生物降解的高性能屏障材料。CNF膜的透氧性很低;但其透气性明显高于常规包装塑料。制备方法对薄膜的阻挡性能有影响。在不锈钢板上喷涂CNF,形成具有两个独特表面的致密膜,即基侧光滑层和自由侧粗糙层。通过简单地调整悬浮液中CNF的含量来调整膜的基本重量和厚度,从而提高了膜的制备便利性和降低了水蒸气的渗透性。在1.0 wt.%至2.0 wt.% CNF悬浮液中,薄膜的空气持久性小于0.003 μ m/Pa·S,证实了薄膜是一种不渗透的薄膜,证明了它是一种良好的包装材料。扫描电镜(SEM)、光学轮廓仪(opilometry)和原子力显微镜(AFM)显示,喷涂表面光滑、有光泽。基重为86.26±13.61 ~ 155.85±18.01 g/m2的CNF膜,WVP为6.99±1.17 × 10−11 ~ 4.19±1.45 × 10−11 g/m·Pa·S。相比之下,100 g/m2真空过滤CNF膜的WVP为5.50±0.84 × 10−11 g/m·Pa·S,喷涂膜(96.6 g/m2)也表现出相似的渗透率,约为5.34±0.603 × 10−11 g/m·Pa·S。当CNF用量为2.0 wt.%时,其水蒸气渗透率为3.91 × 10−11 g/m·s·Pa。喷涂CNF薄膜对空气和水蒸气是不渗透的,是合成塑料的潜在替代品。
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Barrier Performance of Spray Coated Cellulose Nanofibre Film
Cellulose nanofibre (CNF) is the sustainable nanomaterial used for developing high-performance barrier materials that are renewable, recyclable, and biodegradable. The CNF film has very low oxygen permeability; however, its water vapor permeability is significantly higher than that of conventional packaging plastics. The fabrication method influences their barrier properties of the film. A spray-coating CNF on a stainless-steel plate was developed to form a compact film with two unique surfaces, namely a smooth layer on the base side and rough layer on the free side. It improves both the ease of preparation of the film and reduces the water vapour permeability via tailoring the basis weight and thickness of the film through simple adjusting CNF content in the suspension. The air permanence of the film from 1.0 wt.% to 2.0 wt.% CNF suspension is less than 0.003 µm/Pa·S confirming that is an impermeable film and proves a good packaging material. SEM, optical profilometry, and AFM revealed that the spray-coated surface was smooth and glossy. For sprayed CNF films with basis weight between 86.26 ± 13.61 and 155.85 ± 18.01 g/m2, WVP were ranged from 6.99 ± 1.17 × 10−11 to 4.19 ± 1.45 × 10−11 g/m·Pa·S. In comparison, the WVP of 100 g/m2 vacuum filtered CNF film was 5.50 ± 0.84 × 10−11 g/m·Pa·S, spray-coated film (of 96.6 g/m2) also show similar permeability at around 5.34 ± 0.603 × 10−11 g/m·Pa·S. The best performance was achieved with spraying of 2.0 wt.% CNF and a water vapour permeability of 3.91 × 10−11 g/m·s·Pa. Spray coated CNF film is impermeable against air and water vapour and a potential alternative to synthetic plastics.
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来源期刊
Micro & Nano Letters
Micro & Nano Letters 工程技术-材料科学:综合
CiteScore
3.30
自引率
0.00%
发文量
58
审稿时长
2.8 months
期刊介绍: Micro & Nano Letters offers express online publication of short research papers containing the latest advances in miniature and ultraminiature structures and systems. With an average of six weeks to decision, and publication online in advance of each issue, Micro & Nano Letters offers a rapid route for the international dissemination of high quality research findings from both the micro and nano communities. Scope Micro & Nano Letters offers express online publication of short research papers containing the latest advances in micro and nano-scale science, engineering and technology, with at least one dimension ranging from micrometers to nanometers. Micro & Nano Letters offers readers high-quality original research from both the micro and nano communities, and the materials and devices communities. Bridging this gap between materials science and micro and nano-scale devices, Micro & Nano Letters addresses issues in the disciplines of engineering, physical, chemical, and biological science. It places particular emphasis on cross-disciplinary activities and applications. Typical topics include: Micro and nanostructures for the device communities MEMS and NEMS Modelling, simulation and realisation of micro and nanoscale structures, devices and systems, with comparisons to experimental data Synthesis and processing Micro and nano-photonics Molecular machines, circuits and self-assembly Organic and inorganic micro and nanostructures Micro and nano-fluidics
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