In this section, you can access to the latest technical information related to the FUTURE project topic.

Strong and tough PVA/PAA hydrogel fiber with highly strain sensitivity enabled by coating MWCNTs

A super strong poly (vinyl alcohol)/poly (acrylic acid) (PVA/PAA) anti-freezing hydrogel fiber has been successfully constructed and studied. The introduction of PVA chains significantly improves tensile strength and toughness to 3.8?MPa and 13.7?MJ/m3, respectively. In addition, glycerol in the hydrogel fiber ensures its good flexibility even in ?15 ?C. We coat hydrogel fiber with multi-walled carbon nanotubes (MWCNTs) and study their strain sensing properties. The composite hydrogel fiber has a high gauge factor of 25 at the strain of 40%, which is superior to those common hydrogel-based strain sensors. Notably, the composite hydrogel fiber shows a high stability and repeatability of 5000 cycles, and a fast response time of 225?ms. Besides, the composite hydrogel fiber can detect the large and subtle body movements accurately and timely. Therefore, this composite hydrogel fiber may be a very hopeful candidate for wearable sensing devices.

» Author: Lu Wu, Longwei Li, Mingshuai Fan, Ping Tang, Shuaitao Yang, Lujun Pan, Hai Wang, Yuezhen Bin

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