The nano- to microscale structures at the interface between materials can define the macroscopic material properties. These structures are extremely difficult to investigate for complex material systems, such as cellulose-rich materials. The development of new model cellulose materials and measuring techniques has opened new possibilities to resolve this problem. We present a straightforward approach combining micro-focusing grazing-incidence small-angle X-ray scattering and atomic force microscopy (AFM) to investigate the structural rearrangements of cellulose/cellulose interfaces in situ during drying. Based on the results, we propose that molecular interdiffusion and structural rearrangement play a major role in the development of the properties of the cellulose/cellulose interphase; this model is representative of the development of the properties of joint/contact points between macroscopic cellulose fibers.

中文翻译：

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原位掠入射小角度X射线散射揭示干燥纤维素材料间相的结构发展

材料界面处的纳米到微米级结构可以定义宏观材料特性。对于复杂的材料系统，例如富含纤维素的材料，研究这些结构极其困难。新型纤维素材料和测量技术的发展为解决这一问题开辟了新的可能性。我们提出了一种结合微聚焦掠入射小角度 X 射线散射和原子力显微镜 (AFM) 的直接方法，以研究干燥过程中原位纤维素/纤维素界面的结构重排。基于这些结果，我们提出分子相互扩散和结构重排在纤维素/纤维素界面性质的发展中起主要作用；