The poroelasticity of cellulose hydrogels was studied by a series of compression tests. The stiffness of the cellulose hydrogel was found to be independent on the crystallinity of a skeletal gel matrix, suggesting that the poroelasticity made a significant contribution to mechanical properties of the hydrogel. Indeed, typical poroelastic responses were observed when the cellulose hydrogels were subjected to the compression tests with varied compression strain rates (i.e. softness upon slow compression but stiffness upon fast compression). The fluid mechanics theory showed that sub-micrometer-scale morphological difference of the gel matrix, which was observable by scanning electron microscopy, affected the flow behavior of water inside porous structure, leading to the increased stiffness upon fast compression.

通过一系列压缩试验研究了纤维素水凝胶的多孔弹性。发现纤维素水凝胶的刚度与骨架凝胶基质的结晶度无关，这表明多孔弹性对水凝胶的机械性能做出了重要贡献。实际上，当纤维素水凝胶以不同的压缩应变速率（即，缓慢压缩时的柔软性而快速压缩时的刚度）进行压缩测试时，观察到典型的多孔弹性响应。流体力学理论表明，可通过扫描电子显微镜观察到的凝胶基质的亚微米级形态差异会影响多孔结构内部水的流动行为，从而导致快速压缩时刚度增加。