Barrier materials are crucial in preserving product quality, safety and longevity across numerous applications, thereby contributing to sustainability, reducing waste and advancing technology. Among these materials, cellulose nanomaterials (CNs) have emerged as promising alternatives for traditional petroleum-based polymers. However, the wide range of sources and the different methods used to isolate and process CN-based materials can result in significant variations in moisture and oxygen barrier performance. In this review, we provide an in-depth discussion on the latest advancements in CN-based green barrier materials. We begin by offering a critical assessment of the barrier performance of CNs, both in their isolated form and when combined as hybrid materials. This includes their applications as standalone films, fillers and coatings in nanocomposites. This review also covers the influence of the isolation process and the stages of film formation on barrier efficacy. We further discuss the implications of the recycling process on barrier properties of CN-based materials, drawing a connection between barrier characteristics and the product's end-of-life. We conclude by highlighting the significant developments over the past five years, the present challenges, and the prospective future of CN-based materials in barrier applications.

中文翻译：

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从生产到性能：为可持续应用定制纤维素纳米材料的水分和氧气阻隔性——综述

阻隔材料对于在众多应用中保持产品质量、安全性和使用寿命至关重要，从而有助于可持续发展、减少浪费和先进技术。在这些材料中，纤维素纳米材料（CN）已成为传统石油基聚合物的有前途的替代品。然而，不同的来源以及用于分离和加工 CN 基材料的不同方法可能会导致水分和氧气阻隔性能的显着变化。在这篇综述中，我们深入讨论了基于 CN 的绿色阻隔材料的最新进展。我们首先对氯化萘的阻隔性能进行严格评估，无论是单独形式还是作为混合材料组合时。这包括它们在纳米复合材料中作为独立薄膜、填料和涂层的应用。本综述还涵盖了隔离过程和成膜阶段对屏障功效的影响。我们进一步讨论了回收过程对 CN 基材料阻隔性能的影响，并在阻隔特性和产品寿命结束之间建立了联系。最后，我们强调了过去五年中 CN 基材料在阻隔应用中的重大发展、当前的挑战以及未来的前景。