Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 58, SE-100 44 Stockholm, Sweden.
Department of Physics, AlbaNova University Center, Stockholm University, Stockholm 10691, Sweden.
Biomacromolecules. 2021 Oct 11;22(10):4274-4283. doi: 10.1021/acs.biomac.1c00845. Epub 2021 Sep 20.
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.
材料界面的纳米到微观结构可以定义宏观材料性能。对于纤维素丰富的复杂材料体系，这些结构极难研究。新型模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。我们提出了一种简单的方法，结合微聚焦掠入射小角 X 射线散射和原子力显微镜（AFM）原位研究纤维素/纤维素界面在干燥过程中的结构重排。基于这些结果，我们提出分子扩散和结构重排在纤维素/纤维素相间性质的发展中起着重要作用；该模型代表了宏观纤维素纤维之间的连接/接触点性质的发展。
