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Fig. 2 | Biotechnology for Biofuels

Fig. 2

From: Lignin valorization: lignin nanoparticles as high-value bio-additive for multifunctional nanocomposites

Fig. 2

UV–Vis light transmittance spectra and digital photographs of a and b DLNPs/PVA and c and d OLNPs/PVA composite films with 0–4 wt% lignin nanoparticles. The digital photographs show the high optical transparency of the lignin nanoparticles/PVA composite films (from top to bottom, the content of lignin nanoparticles in the film was increasing from 0 to 4 wt%)

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