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Biodegradable and transparent films with tunable UV-blocking property from Lignocellulosic waste by a top-down approach

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Abstract

As over exposure of the earth to ultraviolet (UV) light and increased amount of petroleum-based plastic waste, biodegradable UV-blocking materials are desired for diverse sustainable applications. The corncob residue from xylitol production (CRXP), as a kind of lignocellulosic waste, is mainly composed of cellulose and lignin. Here, we developed a series of CRXP films through a top-down approach (i.e., tunable delignification and regeneration) without any additional additives. Regenerated films, prepared from treated CRXP with lignin contents of 4.4%–29.7%, had excellent UV-blocking capability: 68.6–99.2% for UVB (290–320 nm) and 47.1–98.2% for UVA (320–400 nm). Moreover, these films showed high optical transparency (50.6–86.6%), enhanced water vapor barrier property (2.17–2.76 × 10–11 g cm cm−2 s−1 mmHg−1), great surface hydrophobicity (water contact angle = 73.3°–86.6°), and good thermal stability. Overall, our sustainable UV-blocking films based on CRXP have potential applications in the fields of electronics, food packaging, windshields, and so forth. This study provides new insights into converting lignocellulosic waste directly to high value-added functional bioproducts.

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Funding

This study was funded by National Key R&D Program of China (No. 2019YFB1503804) and Hot-Spots Tracking Project of Bei**g Forestry University (No. 2019BLRD12).

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Correspondence to Sheng Chen or Feng Xu.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors. In the experiment, we did not collect any samples of humans and animals.

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Song, Y., Chen, S., Chen, Y. et al. Biodegradable and transparent films with tunable UV-blocking property from Lignocellulosic waste by a top-down approach. Cellulose 28, 8629–8640 (2021). https://doi.org/10.1007/s10570-021-03994-5

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  • DOI: https://doi.org/10.1007/s10570-021-03994-5

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