Cellulose nanofiber (CNF) is a crystalline fiber composed of a bundle of cellulose molecular chains and is expected to be used as a new biomass-derived nanomaterial. The CNF has a unique morphology: a few to tens of nanometer width and a submicrometer to micrometer length. Its application to various materials, in particular its utilization as a polymer reinforcing material, has been anticipated due to its excellent mechanical properties. However, CNFs and plastics are generally hard to mix, and thus, it is difficult to combine them at the nanolevel. In this review, we describe the CNF/polymer nanocompositing process from Pickering emulsion. We use ~3 nm-wide wood-derived CNFs and report on the preparation of CNF/polymer homogenous composite films. We also introduce a new type of CNF/polymer composite, a core-shell microparticle, using this Pickering emulsion as a template. Our recent studies on the cellulose nanofibrils (CNFs)/polymer nanocomposites prepared via Pickering emulsion templating are reviewed. CNF-stabilized monomer-in-water emulsions were used as starting materials to design the composite structures. In the first part of this review, we summarize the preparation of transparent films. The second part describes the approaches to prepare a composite microparticles having CNF shells.

中文翻译：

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基于 Pickering 乳液模板的纳米纤维素/聚合物复合材料的材料设计

纤维素纳米纤维（CNF）是由一束纤维素分子链组成的结晶纤维，有望作为一种新型的生物质衍生纳米材料。CNF 具有独特的形态：几纳米到几十纳米的宽度和亚微米到微米的长度。由于其优异的机械性能，它在各种材料中的应用，特别是它作为聚合物增强材料的应用，已被期待。然而，CNFs和塑料通常很难混合，因此很难在纳米级将它们结合起来。在这篇综述中，我们描述了来自 Pickering 乳液的 CNF/聚合物纳米复合工艺。我们使用~3 nm 宽的木材衍生的 CNF，并报告了 CNF/聚合物均质复合膜的制备。我们还介绍了一种新型的 CNF/聚合物复合材料，一种核壳微粒，使用这种 Pickering 乳液作为模板。综述了我们最近对通过 Pickering 乳液模板制备的纤维素纳米纤维 (CNF)/聚合物纳米复合材料的研究。CNF稳定的水包单体乳液被用作设计复合结构的起始材料。在本综述的第一部分，我们总结了透明薄膜的制备。第二部分描述了制备具有 CNF 壳的复合微粒的方法。