LDHs基气体阻隔薄膜材料的研究进展

doi:10.16085/j.issn.1000-6613.2020-0251

摘要/Abstract

摘要：

透明且具有柔性的气体阻隔材料在电子器件封装、食品和药品保存等方面显示出广阔的应用前景。本文从材料的结构设计、制备方法和性能强化途径几个方面综述了层状双金属氢氧化物（LDHs）基气体阻隔薄膜材料的研究发展现状。研究指出，以绕道理论模型为理论支撑展开的主体、客体及主客体间的相互作用设计是材料性能提升的关键。首先，主体LDHs纳米片具有可调节的长径比，这对于调控气体阻隔性能来说是一种理想的填充材料；其次，聚合物客体的种类多样性赋予了LDH/聚合物气体阻隔薄膜独特的力学、光学和电化学特性，为气体阻隔薄膜的实际应用提供了更广阔的空间，同时对聚合物基体的物理化学特性的调节可提升阻隔性能；再者，调节LDHs和聚合物之间的相互作用力可进一步减小主客体间的自由体积，使得气体阻隔特性进一步提升，同时，有序的2D结构赋予了LDHs纳米片的高取向，可以延长气体分子的扩散路径而提高薄膜材料的非渗透性。最后，提出LDHs基气体阻隔薄膜材料性能强化将成为LDHs基气体阻隔薄膜材料发展的新方向。

关键词: 膜, 纳米材料, 气体阻隔, 复合材料, 结构设计, 组装方法, 性能强化

Abstract:

Transparent and flexible gas barrier materials have wide application prospects in electronic device packaging, food and drug preservation and so on. This article reviews the research and development progress of layered double hydroxides (LDHs)-based gas barrier thin film materials from the aspects of structural design, preparation methods and performance enhancement. The design of the interaction between the guest and the host is the key to the improvement of material properties. Firstly, the host LDH nanosheet has an adjustable aspect ratio, which is an ideal filling material for enhancing the gas barrier property. Secondly, the variety of polymer guest gives unique mechanical, optical and electrochemical, properties to LDH/polymer gas barrier films, providing wide space for the practical application of the barrier materials, and the adjustment of physical and chemical properties of polymer matrix can improve the barrier performance. Furthermore, adjusting the interaction between LDHs and polymers can reduce the free volume between the host and the guest, which further improves the gas barrier properties. At the same time, the ordered 2D structure giving the LDHs nanosheets a high degree of orientation can extend the diffusion path of gas molecules and improve the non-permeability of thin film materials. Finally, it is proposed that the performance enhancement of LDHs-based gas barrier film materials will become a new direction for the development of high-performance gas barrier materials.

Key words: film, nanomaterials, gas barrier, composite materials, structural design, assembly method, performance enhancement

中图分类号:

许晓芝, 李彪, 施凯强, 董思源, 靳祖超, 韩景宾. LDHs基气体阻隔薄膜材料的研究进展[J]. 化工进展, 2020, 39(6): 2177-2186.

Xiaozhi XU, Biao LI, Kaiqiang SHI, Siyuan DONG, Zuchao JIN, Jingbin HAN. Recent advances in LDHs-based gas barrier materials[J]. Chemical Industry and Engineering Progress, 2020, 39(6): 2177-2186.

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