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The surface morphology and plasticity of real samples. (a,b) Digital photos of sulfur cottonseed oil (SCO) and sulfur fatty acid of cottonseed oil (SCOF), respectively; (c–e) digital images of sulfur–sodium soap of cottonseed oil (SCOS): (c) cubic SCOS, (d) ring-shaped SCOS and (e) U-shaped SCOS; (f,g) SEM images of SCO and SCOS, respectively (mS: mCOX = 1:1).
