Cellulose nanofiber (CNF) is the most effective reinforcement fiber for enhancing the physical properties of water-soluble polymers. Here, effect of CNF on the Young’s modulus of a polyvinyl alcohol (PVA) hydrogel produced through the freeze/thaw method is examined. PVA/CNF composite gels with different contents of CNF and PVA were produced without significant aggregation of CNFs during the freeze/thaw process. The Young’s modulus of the produced PVA/CNF gel gradually increased as the CNF content increased, and it was confirmed that CNF had a marked reinforcement effect. In gel with PVA = 7 vol%, percolation networks formed at CNF ≥ 0.6 vol%. Furthermore, adding ca. CNF = 1.5 vol% resulted in a 250% increase in the gel’s Young’s modulus. In addition, mechanical interaction was observed between the PVA and CNF networks. It was suggested that, similarly to CNF networks, PVA networks also limit the deformation of CNF networks.

纤维素纳米纤维（CNF）是增强水溶性聚合物物理性能的最有效的增强纤维。在此，研究了CNF对通过冻融法制得的聚乙烯醇（PVA）水凝胶的杨氏模量的影响。制备具有不同含量的CNF和PVA的PVA / CNF复合凝胶，在冷冻/融化过程中CNF没有明显聚集。随着CNF含量的增加，所生产的PVA / CNF凝胶的杨氏模量逐渐增加，并且证实了CNF具有显着的增强作用。在PVA = 7 vol％的凝胶中，渗滤网络在CNF≥0.6 vol％时形成。此外，添加ca。CNF = 1.5 vol％使凝胶的杨氏模量增加250％。另外，在PVA和CNF网络之间观察到机械相互作用。有人建议，