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(A) Photographs of lignin-based bioplastic materials. (B) Normalized transmittance measurements of lignin-based samples. Top inset: UV–vis spectra of CLX-0, CLX-25, and CLX-50 samples with the same thickness in the range of the visible light spectrum. Bottom insets: macroscopic appearance of CLX-0, CLX-25, and CLX-50 samples (credits for the logo to Istituto Italiano di Tecnologia). (C) XRD patterns of lignin-based bioplastics.
