biostudies-literatureUnknown11(1)Jha SKThis work presents a novel method to synthesize polyurethane (PU) with a disulfide linkage and embed graphene nanoplatelet (GnP) to form composite films for wearable strain sensors. These films are highly sensitive and flexible. The PU was chain-extended with a disulfide chain extender, which improved molecular flexibility. This modification provided greater flexibility in comparison to traditional butanediol-extended PU. The chemical structure of the samples was qualitatively analyzed utilizing FTIR spectroscopy. Purity of GnP was characterized using Raman spectroscopy. The shape and structure of the nanocomposite were analyzed by using scanning electron microscopy (SEM), which showed the distribution of GnP in the PU matrix. Atomic force microscopy (AFM) was used to analyze the three-dimACS omega1836-1848https://www.ebi.ac.uk/biostudies/studies/S-EPMC12809336biostudies-literatureDevelopment of a Robust and Flexible Wearable Sensor Derived from Disulfide-Linked Polyurethane/Graphene Nanoplatelets with Enhanced Temperature Tolerance.PMC12809336Jha SKRohini RSrivastava PfalseDevelopment of a Robust and Flexible Wearable Sensor Derived from Disulfide-Linked Polyurethane/Graphene Nanoplatelets with Enhanced Temperature Tolerance.This work presents a novel method to synthesize polyurethane (PU) with a disulfide linkage and embed graphene nanoplatelet (GnP) to form composite films for wearable strain sensors. These films are highly sensitive and flexible. The PU was chain-extended with a disulfide chain extender, which improved molecular flexibility. This modification provided greater flexibility in comparison to traditional butanediol-extended PU. The chemical structure of the samples was qualitatively analyzed utilizing FTIR spectroscopy. Purity of GnP was characterized using Raman spectroscopy. The shape and structure of the nanocomposite were analyzed by using scanning electron microscopy (SEM), which showed the distribution of GnP in the PU matrix. Atomic force microscopy (AFM) was used to analyze the three-dim2026-01-01T00:00:00Z2026 Jan2026-06-06T15:36:10.275Z2026-06-02T03:09:14.451ZS-EPMC128093364155252010.1021/acsomega.5c09964