The Effect of Hemicellulose Content on Mechanical Strength, Thermal Stability, and Water Resistance of Cellulose-rich Fiber Material from Poplar

Here, a highly flexible and anisotropic strain sensor based on sustainable biomass-derived materials is fabricated through a facile, low-cost, and scalable approach. The commercially available crepe paper made of the abundant and renewable cellulose is converted into a conductive network by carbonization. The fabricated strain sensor based on this carbonized crepe paper (CCP) exhibits high flexibility, fast response time (<115 ms), high durability (>10 000 cycles), and negligible hysteresis. Especially, the CCP strain sensor shows dramatically different gauge factors (10.10 and 0.14, respectively) between tensile bending perpendicular and parallel to the fibers direction. This anisotropic sensing performance is inherited from the crepe paper's unique anisotropic structure, i.e., aligned cellulose fibers and a corrugated surface, which is well maintained in the CCP.